/*
 * Copyright 2015 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 */
#include "drmP.h"
#include "amdgpu.h"
#include "amdgpu_pm.h"
#include "amdgpu_i2c.h"
#include "atom.h"
#include "amdgpu_atombios.h"
#include "atombios_crtc.h"
#include "atombios_encoders.h"
#include "amdgpu_pll.h"
#include "amdgpu_connectors.h"

#include "bif/bif_3_0_d.h"
#include "bif/bif_3_0_sh_mask.h"
#include "oss/oss_1_0_d.h"
#include "oss/oss_1_0_sh_mask.h"
#include "gca/gfx_6_0_d.h"
#include "gca/gfx_6_0_sh_mask.h"
#include "gmc/gmc_6_0_d.h"
#include "gmc/gmc_6_0_sh_mask.h"
#include "dce/dce_6_0_d.h"
#include "dce/dce_6_0_sh_mask.h"
#include "gca/gfx_7_2_enum.h"
#include "si_enums.h"

static void dce_v6_0_set_display_funcs(struct amdgpu_device *adev);
static void dce_v6_0_set_irq_funcs(struct amdgpu_device *adev);

static const u32 crtc_offsets[6] =
{
        SI_CRTC0_REGISTER_OFFSET,
        SI_CRTC1_REGISTER_OFFSET,
        SI_CRTC2_REGISTER_OFFSET,
        SI_CRTC3_REGISTER_OFFSET,
        SI_CRTC4_REGISTER_OFFSET,
        SI_CRTC5_REGISTER_OFFSET
};

static const u32 hpd_offsets[] =
{
        mmDC_HPD1_INT_STATUS - mmDC_HPD1_INT_STATUS,
        mmDC_HPD2_INT_STATUS - mmDC_HPD1_INT_STATUS,
        mmDC_HPD3_INT_STATUS - mmDC_HPD1_INT_STATUS,
        mmDC_HPD4_INT_STATUS - mmDC_HPD1_INT_STATUS,
        mmDC_HPD5_INT_STATUS - mmDC_HPD1_INT_STATUS,
        mmDC_HPD6_INT_STATUS - mmDC_HPD1_INT_STATUS,
};

static const uint32_t dig_offsets[] = {
        SI_CRTC0_REGISTER_OFFSET,
        SI_CRTC1_REGISTER_OFFSET,
        SI_CRTC2_REGISTER_OFFSET,
        SI_CRTC3_REGISTER_OFFSET,
        SI_CRTC4_REGISTER_OFFSET,
        SI_CRTC5_REGISTER_OFFSET,
        (0x13830 - 0x7030) >> 2,
};

static const struct {
        uint32_t        reg;
        uint32_t        vblank;
        uint32_t        vline;
        uint32_t        hpd;

} interrupt_status_offsets[6] = { {
        .reg = mmDISP_INTERRUPT_STATUS,
        .vblank = DISP_INTERRUPT_STATUS__LB_D1_VBLANK_INTERRUPT_MASK,
        .vline = DISP_INTERRUPT_STATUS__LB_D1_VLINE_INTERRUPT_MASK,
        .hpd = DISP_INTERRUPT_STATUS__DC_HPD1_INTERRUPT_MASK
}, {
        .reg = mmDISP_INTERRUPT_STATUS_CONTINUE,
        .vblank = DISP_INTERRUPT_STATUS_CONTINUE__LB_D2_VBLANK_INTERRUPT_MASK,
        .vline = DISP_INTERRUPT_STATUS_CONTINUE__LB_D2_VLINE_INTERRUPT_MASK,
        .hpd = DISP_INTERRUPT_STATUS_CONTINUE__DC_HPD2_INTERRUPT_MASK
}, {
        .reg = mmDISP_INTERRUPT_STATUS_CONTINUE2,
        .vblank = DISP_INTERRUPT_STATUS_CONTINUE2__LB_D3_VBLANK_INTERRUPT_MASK,
        .vline = DISP_INTERRUPT_STATUS_CONTINUE2__LB_D3_VLINE_INTERRUPT_MASK,
        .hpd = DISP_INTERRUPT_STATUS_CONTINUE2__DC_HPD3_INTERRUPT_MASK
}, {
        .reg = mmDISP_INTERRUPT_STATUS_CONTINUE3,
        .vblank = DISP_INTERRUPT_STATUS_CONTINUE3__LB_D4_VBLANK_INTERRUPT_MASK,
        .vline = DISP_INTERRUPT_STATUS_CONTINUE3__LB_D4_VLINE_INTERRUPT_MASK,
        .hpd = DISP_INTERRUPT_STATUS_CONTINUE3__DC_HPD4_INTERRUPT_MASK
}, {
        .reg = mmDISP_INTERRUPT_STATUS_CONTINUE4,
        .vblank = DISP_INTERRUPT_STATUS_CONTINUE4__LB_D5_VBLANK_INTERRUPT_MASK,
        .vline = DISP_INTERRUPT_STATUS_CONTINUE4__LB_D5_VLINE_INTERRUPT_MASK,
        .hpd = DISP_INTERRUPT_STATUS_CONTINUE4__DC_HPD5_INTERRUPT_MASK
}, {
        .reg = mmDISP_INTERRUPT_STATUS_CONTINUE5,
        .vblank = DISP_INTERRUPT_STATUS_CONTINUE5__LB_D6_VBLANK_INTERRUPT_MASK,
        .vline = DISP_INTERRUPT_STATUS_CONTINUE5__LB_D6_VLINE_INTERRUPT_MASK,
        .hpd = DISP_INTERRUPT_STATUS_CONTINUE5__DC_HPD6_INTERRUPT_MASK
} };

static u32 dce_v6_0_audio_endpt_rreg(struct amdgpu_device *adev,
                                     u32 block_offset, u32 reg)
{
        DRM_INFO("xxxx: dce_v6_0_audio_endpt_rreg ----no impl!!!!\n");
        return 0;
}

static void dce_v6_0_audio_endpt_wreg(struct amdgpu_device *adev,
                                      u32 block_offset, u32 reg, u32 v)
{
        DRM_INFO("xxxx: dce_v6_0_audio_endpt_wreg ----no impl!!!!\n");
}

static bool dce_v6_0_is_in_vblank(struct amdgpu_device *adev, int crtc)
{
        if (RREG32(mmCRTC_STATUS + crtc_offsets[crtc]) & CRTC_STATUS__CRTC_V_BLANK_MASK)
                return true;
        else
                return false;
}

static bool dce_v6_0_is_counter_moving(struct amdgpu_device *adev, int crtc)
{
        u32 pos1, pos2;

        pos1 = RREG32(mmCRTC_STATUS_POSITION + crtc_offsets[crtc]);
        pos2 = RREG32(mmCRTC_STATUS_POSITION + crtc_offsets[crtc]);

        if (pos1 != pos2)
                return true;
        else
                return false;
}

/**
 * dce_v6_0_wait_for_vblank - vblank wait asic callback.
 *
 * @crtc: crtc to wait for vblank on
 *
 * Wait for vblank on the requested crtc (evergreen+).
 */
static void dce_v6_0_vblank_wait(struct amdgpu_device *adev, int crtc)
{
        unsigned i = 100;

        if (crtc >= adev->mode_info.num_crtc)
                return;

        if (!(RREG32(mmCRTC_CONTROL + crtc_offsets[crtc]) & CRTC_CONTROL__CRTC_MASTER_EN_MASK))
                return;

        /* depending on when we hit vblank, we may be close to active; if so,
         * wait for another frame.
         */
        while (dce_v6_0_is_in_vblank(adev, crtc)) {
                if (i++ == 100) {
                        i = 0;
                        if (!dce_v6_0_is_counter_moving(adev, crtc))
                                break;
                }
        }

        while (!dce_v6_0_is_in_vblank(adev, crtc)) {
                if (i++ == 100) {
                        i = 0;
                        if (!dce_v6_0_is_counter_moving(adev, crtc))
                                break;
                }
        }
}

static u32 dce_v6_0_vblank_get_counter(struct amdgpu_device *adev, int crtc)
{
        if (crtc >= adev->mode_info.num_crtc)
                return 0;
        else
                return RREG32(mmCRTC_STATUS_FRAME_COUNT + crtc_offsets[crtc]);
}

static void dce_v6_0_pageflip_interrupt_init(struct amdgpu_device *adev)
{
        unsigned i;

        /* Enable pflip interrupts */
        for (i = 0; i < adev->mode_info.num_crtc; i++)
                amdgpu_irq_get(adev, &adev->pageflip_irq, i);
}

static void dce_v6_0_pageflip_interrupt_fini(struct amdgpu_device *adev)
{
        unsigned i;

        /* Disable pflip interrupts */
        for (i = 0; i < adev->mode_info.num_crtc; i++)
                amdgpu_irq_put(adev, &adev->pageflip_irq, i);
}

/**
 * dce_v6_0_page_flip - pageflip callback.
 *
 * @adev: amdgpu_device pointer
 * @crtc_id: crtc to cleanup pageflip on
 * @crtc_base: new address of the crtc (GPU MC address)
 *
 * Does the actual pageflip (evergreen+).
 * During vblank we take the crtc lock and wait for the update_pending
 * bit to go high, when it does, we release the lock, and allow the
 * double buffered update to take place.
 * Returns the current update pending status.
 */
static void dce_v6_0_page_flip(struct amdgpu_device *adev,
                               int crtc_id, u64 crtc_base, bool async)
{
        struct amdgpu_crtc *amdgpu_crtc = adev->mode_info.crtcs[crtc_id];

        /* flip at hsync for async, default is vsync */
        WREG32(mmGRPH_FLIP_CONTROL + amdgpu_crtc->crtc_offset, async ?
               GRPH_FLIP_CONTROL__GRPH_SURFACE_UPDATE_H_RETRACE_EN_MASK : 0);
        /* update the scanout addresses */
        WREG32(mmGRPH_PRIMARY_SURFACE_ADDRESS_HIGH + amdgpu_crtc->crtc_offset,
               upper_32_bits(crtc_base));
        WREG32(mmGRPH_PRIMARY_SURFACE_ADDRESS + amdgpu_crtc->crtc_offset,
               (u32)crtc_base);

        /* post the write */
        RREG32(mmGRPH_PRIMARY_SURFACE_ADDRESS + amdgpu_crtc->crtc_offset);
}

static int dce_v6_0_crtc_get_scanoutpos(struct amdgpu_device *adev, int crtc,
                                        u32 *vbl, u32 *position)
{
        if ((crtc < 0) || (crtc >= adev->mode_info.num_crtc))
                return -EINVAL;
        *vbl = RREG32(mmCRTC_V_BLANK_START_END + crtc_offsets[crtc]);
        *position = RREG32(mmCRTC_STATUS_POSITION + crtc_offsets[crtc]);

        return 0;

}

/**
 * dce_v6_0_hpd_sense - hpd sense callback.
 *
 * @adev: amdgpu_device pointer
 * @hpd: hpd (hotplug detect) pin
 *
 * Checks if a digital monitor is connected (evergreen+).
 * Returns true if connected, false if not connected.
 */
static bool dce_v6_0_hpd_sense(struct amdgpu_device *adev,
                               enum amdgpu_hpd_id hpd)
{
        bool connected = false;

        if (hpd >= adev->mode_info.num_hpd)
                return connected;

        if (RREG32(mmDC_HPD1_INT_STATUS + hpd_offsets[hpd]) & DC_HPD1_INT_STATUS__DC_HPD1_SENSE_MASK)
                connected = true;

        return connected;
}

/**
 * dce_v6_0_hpd_set_polarity - hpd set polarity callback.
 *
 * @adev: amdgpu_device pointer
 * @hpd: hpd (hotplug detect) pin
 *
 * Set the polarity of the hpd pin (evergreen+).
 */
static void dce_v6_0_hpd_set_polarity(struct amdgpu_device *adev,
                                      enum amdgpu_hpd_id hpd)
{
        u32 tmp;
        bool connected = dce_v6_0_hpd_sense(adev, hpd);

        if (hpd >= adev->mode_info.num_hpd)
                return;

        tmp = RREG32(mmDC_HPD1_INT_CONTROL + hpd_offsets[hpd]);
        if (connected)
                tmp &= ~DC_HPD1_INT_CONTROL__DC_HPD1_INT_POLARITY_MASK;
        else
                tmp |= DC_HPD1_INT_CONTROL__DC_HPD1_INT_POLARITY_MASK;
        WREG32(mmDC_HPD1_INT_CONTROL + hpd_offsets[hpd], tmp);
}

/**
 * dce_v6_0_hpd_init - hpd setup callback.
 *
 * @adev: amdgpu_device pointer
 *
 * Setup the hpd pins used by the card (evergreen+).
 * Enable the pin, set the polarity, and enable the hpd interrupts.
 */
static void dce_v6_0_hpd_init(struct amdgpu_device *adev)
{
        struct drm_device *dev = adev->ddev;
        struct drm_connector *connector;
        u32 tmp;

        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
                struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);

                if (amdgpu_connector->hpd.hpd >= adev->mode_info.num_hpd)
                        continue;

                tmp = RREG32(mmDC_HPD1_CONTROL + hpd_offsets[amdgpu_connector->hpd.hpd]);
                tmp |= DC_HPD1_CONTROL__DC_HPD1_EN_MASK;
                WREG32(mmDC_HPD1_CONTROL + hpd_offsets[amdgpu_connector->hpd.hpd], tmp);

                if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
                    connector->connector_type == DRM_MODE_CONNECTOR_LVDS) {
                        /* don't try to enable hpd on eDP or LVDS avoid breaking the
                         * aux dp channel on imac and help (but not completely fix)
                         * https://bugzilla.redhat.com/show_bug.cgi?id=726143
                         * also avoid interrupt storms during dpms.
                         */
                        tmp = RREG32(mmDC_HPD1_INT_CONTROL + hpd_offsets[amdgpu_connector->hpd.hpd]);
                        tmp &= ~DC_HPD1_INT_CONTROL__DC_HPD1_INT_EN_MASK;
                        WREG32(mmDC_HPD1_INT_CONTROL + hpd_offsets[amdgpu_connector->hpd.hpd], tmp);
                        continue;
                }

                dce_v6_0_hpd_set_polarity(adev, amdgpu_connector->hpd.hpd);
                amdgpu_irq_get(adev, &adev->hpd_irq, amdgpu_connector->hpd.hpd);
        }

}

/**
 * dce_v6_0_hpd_fini - hpd tear down callback.
 *
 * @adev: amdgpu_device pointer
 *
 * Tear down the hpd pins used by the card (evergreen+).
 * Disable the hpd interrupts.
 */
static void dce_v6_0_hpd_fini(struct amdgpu_device *adev)
{
        struct drm_device *dev = adev->ddev;
        struct drm_connector *connector;
        u32 tmp;

        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
                struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);

                if (amdgpu_connector->hpd.hpd >= adev->mode_info.num_hpd)
                        continue;

                tmp = RREG32(mmDC_HPD1_CONTROL + hpd_offsets[amdgpu_connector->hpd.hpd]);
                tmp &= ~DC_HPD1_CONTROL__DC_HPD1_EN_MASK;
                WREG32(mmDC_HPD1_CONTROL + hpd_offsets[amdgpu_connector->hpd.hpd], 0);

                amdgpu_irq_put(adev, &adev->hpd_irq, amdgpu_connector->hpd.hpd);
        }
}

static u32 dce_v6_0_hpd_get_gpio_reg(struct amdgpu_device *adev)
{
        return mmDC_GPIO_HPD_A;
}

static u32 evergreen_get_vblank_counter(struct amdgpu_device* adev, int crtc)
{
        if (crtc >= adev->mode_info.num_crtc)
                return 0;
        else
                return RREG32(mmCRTC_STATUS_FRAME_COUNT + crtc_offsets[crtc]);
}

static void dce_v6_0_stop_mc_access(struct amdgpu_device *adev,
                                    struct amdgpu_mode_mc_save *save)
{
        u32 crtc_enabled, tmp, frame_count;
        int i, j;

        save->vga_render_control = RREG32(mmVGA_RENDER_CONTROL);
        save->vga_hdp_control = RREG32(mmVGA_HDP_CONTROL);

        /* disable VGA render */
        WREG32(mmVGA_RENDER_CONTROL, 0);

        /* blank the display controllers */
        for (i = 0; i < adev->mode_info.num_crtc; i++) {
                crtc_enabled = RREG32(mmCRTC_CONTROL + crtc_offsets[i]) & CRTC_CONTROL__CRTC_MASTER_EN_MASK;
                if (crtc_enabled) {
                        save->crtc_enabled[i] = true;
                        tmp = RREG32(mmCRTC_BLANK_CONTROL + crtc_offsets[i]);

                        if (!(tmp & CRTC_BLANK_CONTROL__CRTC_BLANK_DATA_EN_MASK)) {
                                dce_v6_0_vblank_wait(adev, i);
                                WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 1);
                                tmp |= CRTC_BLANK_CONTROL__CRTC_BLANK_DATA_EN_MASK;
                                WREG32(mmCRTC_BLANK_CONTROL + crtc_offsets[i], tmp);
                                WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 0);
                        }
                        /* wait for the next frame */
                        frame_count = evergreen_get_vblank_counter(adev, i);
                        for (j = 0; j < adev->usec_timeout; j++) {
                                if (evergreen_get_vblank_counter(adev, i) != frame_count)
                                        break;
                                udelay(1);
                        }

                        /* XXX this is a hack to avoid strange behavior with EFI on certain systems */
                        WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 1);
                        tmp = RREG32(mmCRTC_CONTROL + crtc_offsets[i]);
                        tmp &= ~CRTC_CONTROL__CRTC_MASTER_EN_MASK;
                        WREG32(mmCRTC_CONTROL + crtc_offsets[i], tmp);
                        WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 0);
                        save->crtc_enabled[i] = false;
                        /* ***** */
                } else {
                        save->crtc_enabled[i] = false;
                }
        }
}

static void dce_v6_0_resume_mc_access(struct amdgpu_device *adev,
                                      struct amdgpu_mode_mc_save *save)
{
        u32 tmp;
        int i, j;

        /* update crtc base addresses */
        for (i = 0; i < adev->mode_info.num_crtc; i++) {
                WREG32(mmGRPH_PRIMARY_SURFACE_ADDRESS_HIGH + crtc_offsets[i],
                       upper_32_bits(adev->mc.vram_start));
                WREG32(mmGRPH_SECONDARY_SURFACE_ADDRESS_HIGH + crtc_offsets[i],
                       upper_32_bits(adev->mc.vram_start));
                WREG32(mmGRPH_PRIMARY_SURFACE_ADDRESS + crtc_offsets[i],
                       (u32)adev->mc.vram_start);
                WREG32(mmGRPH_SECONDARY_SURFACE_ADDRESS + crtc_offsets[i],
                       (u32)adev->mc.vram_start);
        }

        WREG32(mmVGA_MEMORY_BASE_ADDRESS_HIGH, upper_32_bits(adev->mc.vram_start));
        WREG32(mmVGA_MEMORY_BASE_ADDRESS, (u32)adev->mc.vram_start);

        /* unlock regs and wait for update */
        for (i = 0; i < adev->mode_info.num_crtc; i++) {
                if (save->crtc_enabled[i]) {
                        tmp = RREG32(mmMASTER_UPDATE_MODE + crtc_offsets[i]);
                        if ((tmp & 0x7) != 0) {
                                tmp &= ~0x7;
                                WREG32(mmMASTER_UPDATE_MODE + crtc_offsets[i], tmp);
                        }
                        tmp = RREG32(mmGRPH_UPDATE + crtc_offsets[i]);
                        if (tmp & GRPH_UPDATE__GRPH_UPDATE_LOCK_MASK) {
                                tmp &= ~GRPH_UPDATE__GRPH_UPDATE_LOCK_MASK;
                                WREG32(mmGRPH_UPDATE + crtc_offsets[i], tmp);
                        }
                        tmp = RREG32(mmMASTER_UPDATE_LOCK + crtc_offsets[i]);
                        if (tmp & 1) {
                                tmp &= ~1;
                                WREG32(mmMASTER_UPDATE_LOCK + crtc_offsets[i], tmp);
                        }
                        for (j = 0; j < adev->usec_timeout; j++) {
                                tmp = RREG32(mmGRPH_UPDATE + crtc_offsets[i]);
                                if ((tmp & GRPH_UPDATE__GRPH_SURFACE_UPDATE_PENDING_MASK) == 0)
                                        break;
                                udelay(1);
                        }
                }
        }

        /* Unlock vga access */
        WREG32(mmVGA_HDP_CONTROL, save->vga_hdp_control);
        mdelay(1);
        WREG32(mmVGA_RENDER_CONTROL, save->vga_render_control);

}

static void dce_v6_0_set_vga_render_state(struct amdgpu_device *adev,
                                          bool render)
{
        if (!render)
                WREG32(mmVGA_RENDER_CONTROL,
                        RREG32(mmVGA_RENDER_CONTROL) & VGA_VSTATUS_CNTL);

}

static int dce_v6_0_get_num_crtc(struct amdgpu_device *adev)
{
        int num_crtc = 0;

        switch (adev->asic_type) {
        case CHIP_TAHITI:
        case CHIP_PITCAIRN:
        case CHIP_VERDE:
                num_crtc = 6;
                break;
        case CHIP_OLAND:
                num_crtc = 2;
                break;
        default:
                num_crtc = 0;
        }
        return num_crtc;
}

void dce_v6_0_disable_dce(struct amdgpu_device *adev)
{
        /*Disable VGA render and enabled crtc, if has DCE engine*/
        if (amdgpu_atombios_has_dce_engine_info(adev)) {
                u32 tmp;
                int crtc_enabled, i;

                dce_v6_0_set_vga_render_state(adev, false);

                /*Disable crtc*/
                for (i = 0; i < dce_v6_0_get_num_crtc(adev); i++) {
                        crtc_enabled = RREG32(mmCRTC_CONTROL + crtc_offsets[i]) &
                                CRTC_CONTROL__CRTC_MASTER_EN_MASK;
                        if (crtc_enabled) {
                                WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 1);
                                tmp = RREG32(mmCRTC_CONTROL + crtc_offsets[i]);
                                tmp &= ~CRTC_CONTROL__CRTC_MASTER_EN_MASK;
                                WREG32(mmCRTC_CONTROL + crtc_offsets[i], tmp);
                                WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 0);
                        }
                }
        }
}

static void dce_v6_0_program_fmt(struct drm_encoder *encoder)
{

        struct drm_device *dev = encoder->dev;
        struct amdgpu_device *adev = dev->dev_private;
        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
        struct drm_connector *connector = amdgpu_get_connector_for_encoder(encoder);
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(encoder->crtc);
        int bpc = 0;
        u32 tmp = 0;
        enum amdgpu_connector_dither dither = AMDGPU_FMT_DITHER_DISABLE;

        if (connector) {
                struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
                bpc = amdgpu_connector_get_monitor_bpc(connector);
                dither = amdgpu_connector->dither;
        }

        /* LVDS FMT is set up by atom */
        if (amdgpu_encoder->devices & ATOM_DEVICE_LCD_SUPPORT)
                return;

        if (bpc == 0)
                return;


        switch (bpc) {
        case 6:
                if (dither == AMDGPU_FMT_DITHER_ENABLE)
                        /* XXX sort out optimal dither settings */
                        tmp |= (FMT_BIT_DEPTH_CONTROL__FMT_FRAME_RANDOM_ENABLE_MASK |
                                FMT_BIT_DEPTH_CONTROL__FMT_HIGHPASS_RANDOM_ENABLE_MASK |
                                FMT_BIT_DEPTH_CONTROL__FMT_SPATIAL_DITHER_EN_MASK);
                else
                        tmp |= FMT_BIT_DEPTH_CONTROL__FMT_TRUNCATE_EN_MASK;
                break;
        case 8:
                if (dither == AMDGPU_FMT_DITHER_ENABLE)
                        /* XXX sort out optimal dither settings */
                        tmp |= (FMT_BIT_DEPTH_CONTROL__FMT_FRAME_RANDOM_ENABLE_MASK |
                                FMT_BIT_DEPTH_CONTROL__FMT_HIGHPASS_RANDOM_ENABLE_MASK |
                                FMT_BIT_DEPTH_CONTROL__FMT_RGB_RANDOM_ENABLE_MASK |
                                FMT_BIT_DEPTH_CONTROL__FMT_SPATIAL_DITHER_EN_MASK |
                                FMT_BIT_DEPTH_CONTROL__FMT_SPATIAL_DITHER_DEPTH_MASK);
                else
                        tmp |= (FMT_BIT_DEPTH_CONTROL__FMT_TRUNCATE_EN_MASK |
                                FMT_BIT_DEPTH_CONTROL__FMT_TRUNCATE_DEPTH_MASK);
                break;
        case 10:
        default:
                /* not needed */
                break;
        }

        WREG32(mmFMT_BIT_DEPTH_CONTROL + amdgpu_crtc->crtc_offset, tmp);
}

/**
 * cik_get_number_of_dram_channels - get the number of dram channels
 *
 * @adev: amdgpu_device pointer
 *
 * Look up the number of video ram channels (CIK).
 * Used for display watermark bandwidth calculations
 * Returns the number of dram channels
 */
static u32 si_get_number_of_dram_channels(struct amdgpu_device *adev)
{
        u32 tmp = RREG32(mmMC_SHARED_CHMAP);

        switch ((tmp & MC_SHARED_CHMAP__NOOFCHAN_MASK) >> MC_SHARED_CHMAP__NOOFCHAN__SHIFT) {
        case 0:
        default:
                return 1;
        case 1:
                return 2;
        case 2:
                return 4;
        case 3:
                return 8;
        case 4:
                return 3;
        case 5:
                return 6;
        case 6:
                return 10;
        case 7:
                return 12;
        case 8:
                return 16;
        }
}

struct dce6_wm_params {
        u32 dram_channels; /* number of dram channels */
        u32 yclk;          /* bandwidth per dram data pin in kHz */
        u32 sclk;          /* engine clock in kHz */
        u32 disp_clk;      /* display clock in kHz */
        u32 src_width;     /* viewport width */
        u32 active_time;   /* active display time in ns */
        u32 blank_time;    /* blank time in ns */
        bool interlaced;    /* mode is interlaced */
        fixed20_12 vsc;    /* vertical scale ratio */
        u32 num_heads;     /* number of active crtcs */
        u32 bytes_per_pixel; /* bytes per pixel display + overlay */
        u32 lb_size;       /* line buffer allocated to pipe */
        u32 vtaps;         /* vertical scaler taps */
};

/**
 * dce_v6_0_dram_bandwidth - get the dram bandwidth
 *
 * @wm: watermark calculation data
 *
 * Calculate the raw dram bandwidth (CIK).
 * Used for display watermark bandwidth calculations
 * Returns the dram bandwidth in MBytes/s
 */
static u32 dce_v6_0_dram_bandwidth(struct dce6_wm_params *wm)
{
        /* Calculate raw DRAM Bandwidth */
        fixed20_12 dram_efficiency; /* 0.7 */
        fixed20_12 yclk, dram_channels, bandwidth;
        fixed20_12 a;

        a.full = dfixed_const(1000);
        yclk.full = dfixed_const(wm->yclk);
        yclk.full = dfixed_div(yclk, a);
        dram_channels.full = dfixed_const(wm->dram_channels * 4);
        a.full = dfixed_const(10);
        dram_efficiency.full = dfixed_const(7);
        dram_efficiency.full = dfixed_div(dram_efficiency, a);
        bandwidth.full = dfixed_mul(dram_channels, yclk);
        bandwidth.full = dfixed_mul(bandwidth, dram_efficiency);

        return dfixed_trunc(bandwidth);
}

/**
 * dce_v6_0_dram_bandwidth_for_display - get the dram bandwidth for display
 *
 * @wm: watermark calculation data
 *
 * Calculate the dram bandwidth used for display (CIK).
 * Used for display watermark bandwidth calculations
 * Returns the dram bandwidth for display in MBytes/s
 */
static u32 dce_v6_0_dram_bandwidth_for_display(struct dce6_wm_params *wm)
{
        /* Calculate DRAM Bandwidth and the part allocated to display. */
        fixed20_12 disp_dram_allocation; /* 0.3 to 0.7 */
        fixed20_12 yclk, dram_channels, bandwidth;
        fixed20_12 a;

        a.full = dfixed_const(1000);
        yclk.full = dfixed_const(wm->yclk);
        yclk.full = dfixed_div(yclk, a);
        dram_channels.full = dfixed_const(wm->dram_channels * 4);
        a.full = dfixed_const(10);
        disp_dram_allocation.full = dfixed_const(3); /* XXX worse case value 0.3 */
        disp_dram_allocation.full = dfixed_div(disp_dram_allocation, a);
        bandwidth.full = dfixed_mul(dram_channels, yclk);
        bandwidth.full = dfixed_mul(bandwidth, disp_dram_allocation);

        return dfixed_trunc(bandwidth);
}

/**
 * dce_v6_0_data_return_bandwidth - get the data return bandwidth
 *
 * @wm: watermark calculation data
 *
 * Calculate the data return bandwidth used for display (CIK).
 * Used for display watermark bandwidth calculations
 * Returns the data return bandwidth in MBytes/s
 */
static u32 dce_v6_0_data_return_bandwidth(struct dce6_wm_params *wm)
{
        /* Calculate the display Data return Bandwidth */
        fixed20_12 return_efficiency; /* 0.8 */
        fixed20_12 sclk, bandwidth;
        fixed20_12 a;

        a.full = dfixed_const(1000);
        sclk.full = dfixed_const(wm->sclk);
        sclk.full = dfixed_div(sclk, a);
        a.full = dfixed_const(10);
        return_efficiency.full = dfixed_const(8);
        return_efficiency.full = dfixed_div(return_efficiency, a);
        a.full = dfixed_const(32);
        bandwidth.full = dfixed_mul(a, sclk);
        bandwidth.full = dfixed_mul(bandwidth, return_efficiency);

        return dfixed_trunc(bandwidth);
}

/**
 * dce_v6_0_dmif_request_bandwidth - get the dmif bandwidth
 *
 * @wm: watermark calculation data
 *
 * Calculate the dmif bandwidth used for display (CIK).
 * Used for display watermark bandwidth calculations
 * Returns the dmif bandwidth in MBytes/s
 */
static u32 dce_v6_0_dmif_request_bandwidth(struct dce6_wm_params *wm)
{
        /* Calculate the DMIF Request Bandwidth */
        fixed20_12 disp_clk_request_efficiency; /* 0.8 */
        fixed20_12 disp_clk, bandwidth;
        fixed20_12 a, b;

        a.full = dfixed_const(1000);
        disp_clk.full = dfixed_const(wm->disp_clk);
        disp_clk.full = dfixed_div(disp_clk, a);
        a.full = dfixed_const(32);
        b.full = dfixed_mul(a, disp_clk);

        a.full = dfixed_const(10);
        disp_clk_request_efficiency.full = dfixed_const(8);
        disp_clk_request_efficiency.full = dfixed_div(disp_clk_request_efficiency, a);

        bandwidth.full = dfixed_mul(b, disp_clk_request_efficiency);

        return dfixed_trunc(bandwidth);
}

/**
 * dce_v6_0_available_bandwidth - get the min available bandwidth
 *
 * @wm: watermark calculation data
 *
 * Calculate the min available bandwidth used for display (CIK).
 * Used for display watermark bandwidth calculations
 * Returns the min available bandwidth in MBytes/s
 */
static u32 dce_v6_0_available_bandwidth(struct dce6_wm_params *wm)
{
        /* Calculate the Available bandwidth. Display can use this temporarily but not in average. */
        u32 dram_bandwidth = dce_v6_0_dram_bandwidth(wm);
        u32 data_return_bandwidth = dce_v6_0_data_return_bandwidth(wm);
        u32 dmif_req_bandwidth = dce_v6_0_dmif_request_bandwidth(wm);

        return min(dram_bandwidth, min(data_return_bandwidth, dmif_req_bandwidth));
}

/**
 * dce_v6_0_average_bandwidth - get the average available bandwidth
 *
 * @wm: watermark calculation data
 *
 * Calculate the average available bandwidth used for display (CIK).
 * Used for display watermark bandwidth calculations
 * Returns the average available bandwidth in MBytes/s
 */
static u32 dce_v6_0_average_bandwidth(struct dce6_wm_params *wm)
{
        /* Calculate the display mode Average Bandwidth
         * DisplayMode should contain the source and destination dimensions,
         * timing, etc.
         */
        fixed20_12 bpp;
        fixed20_12 line_time;
        fixed20_12 src_width;
        fixed20_12 bandwidth;
        fixed20_12 a;

        a.full = dfixed_const(1000);
        line_time.full = dfixed_const(wm->active_time + wm->blank_time);
        line_time.full = dfixed_div(line_time, a);
        bpp.full = dfixed_const(wm->bytes_per_pixel);
        src_width.full = dfixed_const(wm->src_width);
        bandwidth.full = dfixed_mul(src_width, bpp);
        bandwidth.full = dfixed_mul(bandwidth, wm->vsc);
        bandwidth.full = dfixed_div(bandwidth, line_time);

        return dfixed_trunc(bandwidth);
}

/**
 * dce_v6_0_latency_watermark - get the latency watermark
 *
 * @wm: watermark calculation data
 *
 * Calculate the latency watermark (CIK).
 * Used for display watermark bandwidth calculations
 * Returns the latency watermark in ns
 */
static u32 dce_v6_0_latency_watermark(struct dce6_wm_params *wm)
{
        /* First calculate the latency in ns */
        u32 mc_latency = 2000; /* 2000 ns. */
        u32 available_bandwidth = dce_v6_0_available_bandwidth(wm);
        u32 worst_chunk_return_time = (512 * 8 * 1000) / available_bandwidth;
        u32 cursor_line_pair_return_time = (128 * 4 * 1000) / available_bandwidth;
        u32 dc_latency = 40000000 / wm->disp_clk; /* dc pipe latency */
        u32 other_heads_data_return_time = ((wm->num_heads + 1) * worst_chunk_return_time) +
                (wm->num_heads * cursor_line_pair_return_time);
        u32 latency = mc_latency + other_heads_data_return_time + dc_latency;
        u32 max_src_lines_per_dst_line, lb_fill_bw, line_fill_time;
        u32 tmp, dmif_size = 12288;
        fixed20_12 a, b, c;

        if (wm->num_heads == 0)
                return 0;

        a.full = dfixed_const(2);
        b.full = dfixed_const(1);
        if ((wm->vsc.full > a.full) ||
            ((wm->vsc.full > b.full) && (wm->vtaps >= 3)) ||
            (wm->vtaps >= 5) ||
            ((wm->vsc.full >= a.full) && wm->interlaced))
                max_src_lines_per_dst_line = 4;
        else
                max_src_lines_per_dst_line = 2;

        a.full = dfixed_const(available_bandwidth);
        b.full = dfixed_const(wm->num_heads);
        a.full = dfixed_div(a, b);

        b.full = dfixed_const(mc_latency + 512);
        c.full = dfixed_const(wm->disp_clk);
        b.full = dfixed_div(b, c);

        c.full = dfixed_const(dmif_size);
        b.full = dfixed_div(c, b);

        tmp = min(dfixed_trunc(a), dfixed_trunc(b));

        b.full = dfixed_const(1000);
        c.full = dfixed_const(wm->disp_clk);
        b.full = dfixed_div(c, b);
        c.full = dfixed_const(wm->bytes_per_pixel);
        b.full = dfixed_mul(b, c);

        lb_fill_bw = min(tmp, dfixed_trunc(b));

        a.full = dfixed_const(max_src_lines_per_dst_line * wm->src_width * wm->bytes_per_pixel);
        b.full = dfixed_const(1000);
        c.full = dfixed_const(lb_fill_bw);
        b.full = dfixed_div(c, b);
        a.full = dfixed_div(a, b);
        line_fill_time = dfixed_trunc(a);

        if (line_fill_time < wm->active_time)
                return latency;
        else
                return latency + (line_fill_time - wm->active_time);

}

/**
 * dce_v6_0_average_bandwidth_vs_dram_bandwidth_for_display - check
 * average and available dram bandwidth
 *
 * @wm: watermark calculation data
 *
 * Check if the display average bandwidth fits in the display
 * dram bandwidth (CIK).
 * Used for display watermark bandwidth calculations
 * Returns true if the display fits, false if not.
 */
static bool dce_v6_0_average_bandwidth_vs_dram_bandwidth_for_display(struct dce6_wm_params *wm)
{
        if (dce_v6_0_average_bandwidth(wm) <=
            (dce_v6_0_dram_bandwidth_for_display(wm) / wm->num_heads))
                return true;
        else
                return false;
}

/**
 * dce_v6_0_average_bandwidth_vs_available_bandwidth - check
 * average and available bandwidth
 *
 * @wm: watermark calculation data
 *
 * Check if the display average bandwidth fits in the display
 * available bandwidth (CIK).
 * Used for display watermark bandwidth calculations
 * Returns true if the display fits, false if not.
 */
static bool dce_v6_0_average_bandwidth_vs_available_bandwidth(struct dce6_wm_params *wm)
{
        if (dce_v6_0_average_bandwidth(wm) <=
            (dce_v6_0_available_bandwidth(wm) / wm->num_heads))
                return true;
        else
                return false;
}

/**
 * dce_v6_0_check_latency_hiding - check latency hiding
 *
 * @wm: watermark calculation data
 *
 * Check latency hiding (CIK).
 * Used for display watermark bandwidth calculations
 * Returns true if the display fits, false if not.
 */
static bool dce_v6_0_check_latency_hiding(struct dce6_wm_params *wm)
{
        u32 lb_partitions = wm->lb_size / wm->src_width;
        u32 line_time = wm->active_time + wm->blank_time;
        u32 latency_tolerant_lines;
        u32 latency_hiding;
        fixed20_12 a;

        a.full = dfixed_const(1);
        if (wm->vsc.full > a.full)
                latency_tolerant_lines = 1;
        else {
                if (lb_partitions <= (wm->vtaps + 1))
                        latency_tolerant_lines = 1;
                else
                        latency_tolerant_lines = 2;
        }

        latency_hiding = (latency_tolerant_lines * line_time + wm->blank_time);

        if (dce_v6_0_latency_watermark(wm) <= latency_hiding)
                return true;
        else
                return false;
}

/**
 * dce_v6_0_program_watermarks - program display watermarks
 *
 * @adev: amdgpu_device pointer
 * @amdgpu_crtc: the selected display controller
 * @lb_size: line buffer size
 * @num_heads: number of display controllers in use
 *
 * Calculate and program the display watermarks for the
 * selected display controller (CIK).
 */
static void dce_v6_0_program_watermarks(struct amdgpu_device *adev,
                                        struct amdgpu_crtc *amdgpu_crtc,
                                        u32 lb_size, u32 num_heads)
{
        struct drm_display_mode *mode = &amdgpu_crtc->base.mode;
        struct dce6_wm_params wm_low, wm_high;
        u32 dram_channels;
        u32 pixel_period;
        u32 line_time = 0;
        u32 latency_watermark_a = 0, latency_watermark_b = 0;
        u32 priority_a_mark = 0, priority_b_mark = 0;
        u32 priority_a_cnt = PRIORITY_OFF;
        u32 priority_b_cnt = PRIORITY_OFF;
        u32 tmp, arb_control3;
        fixed20_12 a, b, c;

        if (amdgpu_crtc->base.enabled && num_heads && mode) {
                pixel_period = 1000000 / (u32)mode->clock;
                line_time = min((u32)mode->crtc_htotal * pixel_period, (u32)65535);

                priority_a_cnt = 0;
                priority_b_cnt = 0;

                dram_channels = si_get_number_of_dram_channels(adev);

                /* watermark for high clocks */
                if (adev->pm.dpm_enabled) {
                        wm_high.yclk =
                                amdgpu_dpm_get_mclk(adev, false) * 10;
                        wm_high.sclk =
                                amdgpu_dpm_get_sclk(adev, false) * 10;
                } else {
                        wm_high.yclk = adev->pm.current_mclk * 10;
                        wm_high.sclk = adev->pm.current_sclk * 10;
                }

                wm_high.disp_clk = mode->clock;
                wm_high.src_width = mode->crtc_hdisplay;
                wm_high.active_time = mode->crtc_hdisplay * pixel_period;
                wm_high.blank_time = line_time - wm_high.active_time;
                wm_high.interlaced = false;
                if (mode->flags & DRM_MODE_FLAG_INTERLACE)
                        wm_high.interlaced = true;
                wm_high.vsc = amdgpu_crtc->vsc;
                wm_high.vtaps = 1;
                if (amdgpu_crtc->rmx_type != RMX_OFF)
                        wm_high.vtaps = 2;
                wm_high.bytes_per_pixel = 4; /* XXX: get this from fb config */
                wm_high.lb_size = lb_size;
                wm_high.dram_channels = dram_channels;
                wm_high.num_heads = num_heads;

                if (adev->pm.dpm_enabled) {
                /* watermark for low clocks */
                        wm_low.yclk =
                                amdgpu_dpm_get_mclk(adev, true) * 10;
                        wm_low.sclk =
                                amdgpu_dpm_get_sclk(adev, true) * 10;
                } else {
                        wm_low.yclk = adev->pm.current_mclk * 10;
                        wm_low.sclk = adev->pm.current_sclk * 10;
                }

                wm_low.disp_clk = mode->clock;
                wm_low.src_width = mode->crtc_hdisplay;
                wm_low.active_time = mode->crtc_hdisplay * pixel_period;
                wm_low.blank_time = line_time - wm_low.active_time;
                wm_low.interlaced = false;
                if (mode->flags & DRM_MODE_FLAG_INTERLACE)
                        wm_low.interlaced = true;
                wm_low.vsc = amdgpu_crtc->vsc;
                wm_low.vtaps = 1;
                if (amdgpu_crtc->rmx_type != RMX_OFF)
                        wm_low.vtaps = 2;
                wm_low.bytes_per_pixel = 4; /* XXX: get this from fb config */
                wm_low.lb_size = lb_size;
                wm_low.dram_channels = dram_channels;
                wm_low.num_heads = num_heads;

                /* set for high clocks */
                latency_watermark_a = min(dce_v6_0_latency_watermark(&wm_high), (u32)65535);
                /* set for low clocks */
                latency_watermark_b = min(dce_v6_0_latency_watermark(&wm_low), (u32)65535);

                /* possibly force display priority to high */
                /* should really do this at mode validation time... */
                if (!dce_v6_0_average_bandwidth_vs_dram_bandwidth_for_display(&wm_high) ||
                    !dce_v6_0_average_bandwidth_vs_available_bandwidth(&wm_high) ||
                    !dce_v6_0_check_latency_hiding(&wm_high) ||
                    (adev->mode_info.disp_priority == 2)) {
                        DRM_DEBUG_KMS("force priority to high\n");
                        priority_a_cnt |= PRIORITY_ALWAYS_ON;
                        priority_b_cnt |= PRIORITY_ALWAYS_ON;
                }
                if (!dce_v6_0_average_bandwidth_vs_dram_bandwidth_for_display(&wm_low) ||
                    !dce_v6_0_average_bandwidth_vs_available_bandwidth(&wm_low) ||
                    !dce_v6_0_check_latency_hiding(&wm_low) ||
                    (adev->mode_info.disp_priority == 2)) {
                        DRM_DEBUG_KMS("force priority to high\n");
                        priority_a_cnt |= PRIORITY_ALWAYS_ON;
                        priority_b_cnt |= PRIORITY_ALWAYS_ON;
                }

                a.full = dfixed_const(1000);
                b.full = dfixed_const(mode->clock);
                b.full = dfixed_div(b, a);
                c.full = dfixed_const(latency_watermark_a);
                c.full = dfixed_mul(c, b);
                c.full = dfixed_mul(c, amdgpu_crtc->hsc);
                c.full = dfixed_div(c, a);
                a.full = dfixed_const(16);
                c.full = dfixed_div(c, a);
                priority_a_mark = dfixed_trunc(c);
                priority_a_cnt |= priority_a_mark & PRIORITY_MARK_MASK;

                a.full = dfixed_const(1000);
                b.full = dfixed_const(mode->clock);
                b.full = dfixed_div(b, a);
                c.full = dfixed_const(latency_watermark_b);
                c.full = dfixed_mul(c, b);
                c.full = dfixed_mul(c, amdgpu_crtc->hsc);
                c.full = dfixed_div(c, a);
                a.full = dfixed_const(16);
                c.full = dfixed_div(c, a);
                priority_b_mark = dfixed_trunc(c);
                priority_b_cnt |= priority_b_mark & PRIORITY_MARK_MASK;
        }

        /* select wm A */
        arb_control3 = RREG32(mmDPG_PIPE_ARBITRATION_CONTROL3 + amdgpu_crtc->crtc_offset);
        tmp = arb_control3;
        tmp &= ~LATENCY_WATERMARK_MASK(3);
        tmp |= LATENCY_WATERMARK_MASK(1);
        WREG32(mmDPG_PIPE_ARBITRATION_CONTROL3 + amdgpu_crtc->crtc_offset, tmp);
        WREG32(mmDPG_PIPE_URGENCY_CONTROL + amdgpu_crtc->crtc_offset,
               ((latency_watermark_a << DPG_PIPE_URGENCY_CONTROL__URGENCY_LOW_WATERMARK__SHIFT)  |
                (line_time << DPG_PIPE_URGENCY_CONTROL__URGENCY_HIGH_WATERMARK__SHIFT)));
        /* select wm B */
        tmp = RREG32(mmDPG_PIPE_ARBITRATION_CONTROL3 + amdgpu_crtc->crtc_offset);
        tmp &= ~LATENCY_WATERMARK_MASK(3);
        tmp |= LATENCY_WATERMARK_MASK(2);
        WREG32(mmDPG_PIPE_ARBITRATION_CONTROL3 + amdgpu_crtc->crtc_offset, tmp);
        WREG32(mmDPG_PIPE_URGENCY_CONTROL + amdgpu_crtc->crtc_offset,
               ((latency_watermark_b << DPG_PIPE_URGENCY_CONTROL__URGENCY_LOW_WATERMARK__SHIFT) |
                (line_time << DPG_PIPE_URGENCY_CONTROL__URGENCY_HIGH_WATERMARK__SHIFT)));
        /* restore original selection */
        WREG32(mmDPG_PIPE_ARBITRATION_CONTROL3 + amdgpu_crtc->crtc_offset, arb_control3);

        /* write the priority marks */
        WREG32(mmPRIORITY_A_CNT + amdgpu_crtc->crtc_offset, priority_a_cnt);
        WREG32(mmPRIORITY_B_CNT + amdgpu_crtc->crtc_offset, priority_b_cnt);

        /* save values for DPM */
        amdgpu_crtc->line_time = line_time;
        amdgpu_crtc->wm_high = latency_watermark_a;
}

/* watermark setup */
static u32 dce_v6_0_line_buffer_adjust(struct amdgpu_device *adev,
                                   struct amdgpu_crtc *amdgpu_crtc,
                                   struct drm_display_mode *mode,
                                   struct drm_display_mode *other_mode)
{
        u32 tmp, buffer_alloc, i;
        u32 pipe_offset = amdgpu_crtc->crtc_id * 0x8;
        /*
         * Line Buffer Setup
         * There are 3 line buffers, each one shared by 2 display controllers.
         * mmDC_LB_MEMORY_SPLIT controls how that line buffer is shared between
         * the display controllers.  The paritioning is done via one of four
         * preset allocations specified in bits 21:20:
         *  0 - half lb
         *  2 - whole lb, other crtc must be disabled
         */
        /* this can get tricky if we have two large displays on a paired group
         * of crtcs.  Ideally for multiple large displays we'd assign them to
         * non-linked crtcs for maximum line buffer allocation.
         */
        if (amdgpu_crtc->base.enabled && mode) {
                if (other_mode) {
                        tmp = 0; /* 1/2 */
                        buffer_alloc = 1;
                } else {
                        tmp = 2; /* whole */
                        buffer_alloc = 2;
                }
        } else {
                tmp = 0;
                buffer_alloc = 0;
        }

        WREG32(mmDC_LB_MEMORY_SPLIT + amdgpu_crtc->crtc_offset,
               DC_LB_MEMORY_CONFIG(tmp));

        WREG32(mmPIPE0_DMIF_BUFFER_CONTROL + pipe_offset,
               (buffer_alloc << PIPE0_DMIF_BUFFER_CONTROL__DMIF_BUFFERS_ALLOCATED__SHIFT));
        for (i = 0; i < adev->usec_timeout; i++) {
                if (RREG32(mmPIPE0_DMIF_BUFFER_CONTROL + pipe_offset) &
                    PIPE0_DMIF_BUFFER_CONTROL__DMIF_BUFFERS_ALLOCATION_COMPLETED_MASK)
                        break;
                udelay(1);
        }

        if (amdgpu_crtc->base.enabled && mode) {
                switch (tmp) {
                case 0:
                default:
                        return 4096 * 2;
                case 2:
                        return 8192 * 2;
                }
        }

        /* controller not enabled, so no lb used */
        return 0;
}


/**
 *
 * dce_v6_0_bandwidth_update - program display watermarks
 *
 * @adev: amdgpu_device pointer
 *
 * Calculate and program the display watermarks and line
 * buffer allocation (CIK).
 */
static void dce_v6_0_bandwidth_update(struct amdgpu_device *adev)
{
        struct drm_display_mode *mode0 = NULL;
        struct drm_display_mode *mode1 = NULL;
        u32 num_heads = 0, lb_size;
        int i;

        if (!adev->mode_info.mode_config_initialized)
                return;

        amdgpu_update_display_priority(adev);

        for (i = 0; i < adev->mode_info.num_crtc; i++) {
                if (adev->mode_info.crtcs[i]->base.enabled)
                        num_heads++;
        }
        for (i = 0; i < adev->mode_info.num_crtc; i += 2) {
                mode0 = &adev->mode_info.crtcs[i]->base.mode;
                mode1 = &adev->mode_info.crtcs[i+1]->base.mode;
                lb_size = dce_v6_0_line_buffer_adjust(adev, adev->mode_info.crtcs[i], mode0, mode1);
                dce_v6_0_program_watermarks(adev, adev->mode_info.crtcs[i], lb_size, num_heads);
                lb_size = dce_v6_0_line_buffer_adjust(adev, adev->mode_info.crtcs[i+1], mode1, mode0);
                dce_v6_0_program_watermarks(adev, adev->mode_info.crtcs[i+1], lb_size, num_heads);
        }
}
/*
static void dce_v6_0_audio_get_connected_pins(struct amdgpu_device *adev)
{
        int i;
        u32 offset, tmp;

        for (i = 0; i < adev->mode_info.audio.num_pins; i++) {
                offset = adev->mode_info.audio.pin[i].offset;
                tmp = RREG32_AUDIO_ENDPT(offset,
                                      AZ_F0_CODEC_PIN_CONTROL_RESPONSE_CONFIGURATION_DEFAULT);
                if (((tmp & PORT_CONNECTIVITY_MASK) >> PORT_CONNECTIVITY_SHIFT) == 1)
                        adev->mode_info.audio.pin[i].connected = false;
                else
                        adev->mode_info.audio.pin[i].connected = true;
        }

}

static struct amdgpu_audio_pin *dce_v6_0_audio_get_pin(struct amdgpu_device *adev)
{
        int i;

        dce_v6_0_audio_get_connected_pins(adev);

        for (i = 0; i < adev->mode_info.audio.num_pins; i++) {
                if (adev->mode_info.audio.pin[i].connected)
                        return &adev->mode_info.audio.pin[i];
        }
        DRM_ERROR("No connected audio pins found!\n");
        return NULL;
}

static void dce_v6_0_afmt_audio_select_pin(struct drm_encoder *encoder)
{
        struct amdgpu_device *adev = encoder->dev->dev_private;
        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
        struct amdgpu_encoder_atom_dig *dig = amdgpu_encoder->enc_priv;
        u32 offset;

        if (!dig || !dig->afmt || !dig->afmt->pin)
                return;

        offset = dig->afmt->offset;

        WREG32(AFMT_AUDIO_SRC_CONTROL + offset,
               AFMT_AUDIO_SRC_SELECT(dig->afmt->pin->id));

}

static void dce_v6_0_audio_write_latency_fields(struct drm_encoder *encoder,
                                                struct drm_display_mode *mode)
{
        DRM_INFO("xxxx: dce_v6_0_audio_write_latency_fields---no imp!!!!!\n");
}

static void dce_v6_0_audio_write_speaker_allocation(struct drm_encoder *encoder)
{
        DRM_INFO("xxxx: dce_v6_0_audio_write_speaker_allocation---no imp!!!!!\n");
}

static void dce_v6_0_audio_write_sad_regs(struct drm_encoder *encoder)
{
        DRM_INFO("xxxx: dce_v6_0_audio_write_sad_regs---no imp!!!!!\n");

}
*/
static void dce_v6_0_audio_enable(struct amdgpu_device *adev,
                                  struct amdgpu_audio_pin *pin,
                                  bool enable)
{
        DRM_INFO("xxxx: dce_v6_0_audio_enable---no imp!!!!!\n");
}

static const u32 pin_offsets[7] =
{
        (0x1780 - 0x1780),
        (0x1786 - 0x1780),
        (0x178c - 0x1780),
        (0x1792 - 0x1780),
        (0x1798 - 0x1780),
        (0x179d - 0x1780),
        (0x17a4 - 0x1780),
};

static int dce_v6_0_audio_init(struct amdgpu_device *adev)
{
        return 0;
}

static void dce_v6_0_audio_fini(struct amdgpu_device *adev)
{

}

/*
static void dce_v6_0_afmt_update_ACR(struct drm_encoder *encoder, uint32_t clock)
{
        DRM_INFO("xxxx: dce_v6_0_afmt_update_ACR---no imp!!!!!\n");
}
*/
/*
 * build a HDMI Video Info Frame
 */
/*
static void dce_v6_0_afmt_update_avi_infoframe(struct drm_encoder *encoder,
                                               void *buffer, size_t size)
{
        DRM_INFO("xxxx: dce_v6_0_afmt_update_avi_infoframe---no imp!!!!!\n");
}

static void dce_v6_0_audio_set_dto(struct drm_encoder *encoder, u32 clock)
{
        DRM_INFO("xxxx: dce_v6_0_audio_set_dto---no imp!!!!!\n");
}
*/
/*
 * update the info frames with the data from the current display mode
 */
static void dce_v6_0_afmt_setmode(struct drm_encoder *encoder,
                                  struct drm_display_mode *mode)
{
        DRM_INFO("xxxx: dce_v6_0_afmt_setmode ----no impl !!!!!!!!\n");
}

static void dce_v6_0_afmt_enable(struct drm_encoder *encoder, bool enable)
{
        struct drm_device *dev = encoder->dev;
        struct amdgpu_device *adev = dev->dev_private;
        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
        struct amdgpu_encoder_atom_dig *dig = amdgpu_encoder->enc_priv;

        if (!dig || !dig->afmt)
                return;

        /* Silent, r600_hdmi_enable will raise WARN for us */
        if (enable && dig->afmt->enabled)
                return;
        if (!enable && !dig->afmt->enabled)
                return;

        if (!enable && dig->afmt->pin) {
                dce_v6_0_audio_enable(adev, dig->afmt->pin, false);
                dig->afmt->pin = NULL;
        }

        dig->afmt->enabled = enable;

        DRM_DEBUG("%sabling AFMT interface @ 0x%04X for encoder 0x%x\n",
                  enable ? "En" : "Dis", dig->afmt->offset, amdgpu_encoder->encoder_id);
}

static int dce_v6_0_afmt_init(struct amdgpu_device *adev)
{
        int i, j;

        for (i = 0; i < adev->mode_info.num_dig; i++)
                adev->mode_info.afmt[i] = NULL;

        /* DCE6 has audio blocks tied to DIG encoders */
        for (i = 0; i < adev->mode_info.num_dig; i++) {
                adev->mode_info.afmt[i] = kzalloc(sizeof(struct amdgpu_afmt), GFP_KERNEL);
                if (adev->mode_info.afmt[i]) {
                        adev->mode_info.afmt[i]->offset = dig_offsets[i];
                        adev->mode_info.afmt[i]->id = i;
                } else {
                        for (j = 0; j < i; j++) {
                                kfree(adev->mode_info.afmt[j]);
                                adev->mode_info.afmt[j] = NULL;
                        }
                        DRM_ERROR("Out of memory allocating afmt table\n");
                        return -ENOMEM;
                }
        }
        return 0;
}

static void dce_v6_0_afmt_fini(struct amdgpu_device *adev)
{
        int i;

        for (i = 0; i < adev->mode_info.num_dig; i++) {
                kfree(adev->mode_info.afmt[i]);
                adev->mode_info.afmt[i] = NULL;
        }
}

static const u32 vga_control_regs[6] =
{
        mmD1VGA_CONTROL,
        mmD2VGA_CONTROL,
        mmD3VGA_CONTROL,
        mmD4VGA_CONTROL,
        mmD5VGA_CONTROL,
        mmD6VGA_CONTROL,
};

static void dce_v6_0_vga_enable(struct drm_crtc *crtc, bool enable)
{
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        struct drm_device *dev = crtc->dev;
        struct amdgpu_device *adev = dev->dev_private;
        u32 vga_control;

        vga_control = RREG32(vga_control_regs[amdgpu_crtc->crtc_id]) & ~1;
        WREG32(vga_control_regs[amdgpu_crtc->crtc_id], vga_control | (enable ? 1 : 0));
}

static void dce_v6_0_grph_enable(struct drm_crtc *crtc, bool enable)
{
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        struct drm_device *dev = crtc->dev;
        struct amdgpu_device *adev = dev->dev_private;

        WREG32(mmGRPH_ENABLE + amdgpu_crtc->crtc_offset, enable ? 1 : 0);
}

static int dce_v6_0_crtc_do_set_base(struct drm_crtc *crtc,
                                     struct drm_framebuffer *fb,
                                     int x, int y, int atomic)
{
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        struct drm_device *dev = crtc->dev;
        struct amdgpu_device *adev = dev->dev_private;
        struct amdgpu_framebuffer *amdgpu_fb;
        struct drm_framebuffer *target_fb;
        struct drm_gem_object *obj;
        struct amdgpu_bo *abo;
        uint64_t fb_location, tiling_flags;
        uint32_t fb_format, fb_pitch_pixels, pipe_config;
        u32 fb_swap = GRPH_ENDIAN_SWAP(GRPH_ENDIAN_NONE);
        u32 viewport_w, viewport_h;
        int r;
        bool bypass_lut = false;
        struct drm_format_name_buf format_name;

        /* no fb bound */
        if (!atomic && !crtc->primary->fb) {
                DRM_DEBUG_KMS("No FB bound\n");
                return 0;
        }

        if (atomic) {
                amdgpu_fb = to_amdgpu_framebuffer(fb);
                target_fb = fb;
        } else {
                amdgpu_fb = to_amdgpu_framebuffer(crtc->primary->fb);
                target_fb = crtc->primary->fb;
        }

        /* If atomic, assume fb object is pinned & idle & fenced and
         * just update base pointers
         */
        obj = amdgpu_fb->obj;
        abo = gem_to_amdgpu_bo(obj);
        r = amdgpu_bo_reserve(abo, false);
        if (unlikely(r != 0))
                return r;

        if (atomic) {
                fb_location = amdgpu_bo_gpu_offset(abo);
        } else {
                r = amdgpu_bo_pin(abo, AMDGPU_GEM_DOMAIN_VRAM, &fb_location);
                if (unlikely(r != 0)) {
                        amdgpu_bo_unreserve(abo);
                        return -EINVAL;
                }
        }

        amdgpu_bo_get_tiling_flags(abo, &tiling_flags);
        amdgpu_bo_unreserve(abo);

        switch (target_fb->pixel_format) {
        case DRM_FORMAT_C8:
                fb_format = (GRPH_DEPTH(GRPH_DEPTH_8BPP) |
                             GRPH_FORMAT(GRPH_FORMAT_INDEXED));
                break;
        case DRM_FORMAT_XRGB4444:
        case DRM_FORMAT_ARGB4444:
                fb_format = (GRPH_DEPTH(GRPH_DEPTH_16BPP) |
                             GRPH_FORMAT(GRPH_FORMAT_ARGB4444));
#ifdef __BIG_ENDIAN
                fb_swap = GRPH_ENDIAN_SWAP(GRPH_ENDIAN_8IN16);
#endif
                break;
        case DRM_FORMAT_XRGB1555:
        case DRM_FORMAT_ARGB1555:
                fb_format = (GRPH_DEPTH(GRPH_DEPTH_16BPP) |
                             GRPH_FORMAT(GRPH_FORMAT_ARGB1555));
#ifdef __BIG_ENDIAN
                fb_swap = GRPH_ENDIAN_SWAP(GRPH_ENDIAN_8IN16);
#endif
                break;
        case DRM_FORMAT_BGRX5551:
        case DRM_FORMAT_BGRA5551:
                fb_format = (GRPH_DEPTH(GRPH_DEPTH_16BPP) |
                             GRPH_FORMAT(GRPH_FORMAT_BGRA5551));
#ifdef __BIG_ENDIAN
                fb_swap = GRPH_ENDIAN_SWAP(GRPH_ENDIAN_8IN16);
#endif
                break;
        case DRM_FORMAT_RGB565:
                fb_format = (GRPH_DEPTH(GRPH_DEPTH_16BPP) |
                             GRPH_FORMAT(GRPH_FORMAT_ARGB565));
#ifdef __BIG_ENDIAN
                fb_swap = GRPH_ENDIAN_SWAP(GRPH_ENDIAN_8IN16);
#endif
                break;
        case DRM_FORMAT_XRGB8888:
        case DRM_FORMAT_ARGB8888:
                fb_format = (GRPH_DEPTH(GRPH_DEPTH_32BPP) |
                             GRPH_FORMAT(GRPH_FORMAT_ARGB8888));
#ifdef __BIG_ENDIAN
                fb_swap = GRPH_ENDIAN_SWAP(GRPH_ENDIAN_8IN32);
#endif
                break;
        case DRM_FORMAT_XRGB2101010:
        case DRM_FORMAT_ARGB2101010:
                fb_format = (GRPH_DEPTH(GRPH_DEPTH_32BPP) |
                             GRPH_FORMAT(GRPH_FORMAT_ARGB2101010));
#ifdef __BIG_ENDIAN
                fb_swap = GRPH_ENDIAN_SWAP(GRPH_ENDIAN_8IN32);
#endif
                /* Greater 8 bpc fb needs to bypass hw-lut to retain precision */
                bypass_lut = true;
                break;
        case DRM_FORMAT_BGRX1010102:
        case DRM_FORMAT_BGRA1010102:
                fb_format = (GRPH_DEPTH(GRPH_DEPTH_32BPP) |
                             GRPH_FORMAT(GRPH_FORMAT_BGRA1010102));
#ifdef __BIG_ENDIAN
                fb_swap = GRPH_ENDIAN_SWAP(GRPH_ENDIAN_8IN32);
#endif
                /* Greater 8 bpc fb needs to bypass hw-lut to retain precision */
                bypass_lut = true;
                break;
        default:
                DRM_ERROR("Unsupported screen format %s\n",
                          drm_get_format_name(target_fb->pixel_format, &format_name));
                return -EINVAL;
        }

        if (AMDGPU_TILING_GET(tiling_flags, ARRAY_MODE) == ARRAY_2D_TILED_THIN1) {
                unsigned bankw, bankh, mtaspect, tile_split, num_banks;

                bankw = AMDGPU_TILING_GET(tiling_flags, BANK_WIDTH);
                bankh = AMDGPU_TILING_GET(tiling_flags, BANK_HEIGHT);
                mtaspect = AMDGPU_TILING_GET(tiling_flags, MACRO_TILE_ASPECT);
                tile_split = AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT);
                num_banks = AMDGPU_TILING_GET(tiling_flags, NUM_BANKS);

                fb_format |= GRPH_NUM_BANKS(num_banks);
                fb_format |= GRPH_ARRAY_MODE(GRPH_ARRAY_2D_TILED_THIN1);
                fb_format |= GRPH_TILE_SPLIT(tile_split);
                fb_format |= GRPH_BANK_WIDTH(bankw);
                fb_format |= GRPH_BANK_HEIGHT(bankh);
                fb_format |= GRPH_MACRO_TILE_ASPECT(mtaspect);
        } else if (AMDGPU_TILING_GET(tiling_flags, ARRAY_MODE) == ARRAY_1D_TILED_THIN1) {
                fb_format |= GRPH_ARRAY_MODE(GRPH_ARRAY_1D_TILED_THIN1);
        }

        pipe_config = AMDGPU_TILING_GET(tiling_flags, PIPE_CONFIG);
        fb_format |= GRPH_PIPE_CONFIG(pipe_config);

        dce_v6_0_vga_enable(crtc, false);

        /* Make sure surface address is updated at vertical blank rather than
         * horizontal blank
         */
        WREG32(mmGRPH_FLIP_CONTROL + amdgpu_crtc->crtc_offset, 0);

        WREG32(mmGRPH_PRIMARY_SURFACE_ADDRESS_HIGH + amdgpu_crtc->crtc_offset,
               upper_32_bits(fb_location));
        WREG32(mmGRPH_SECONDARY_SURFACE_ADDRESS_HIGH + amdgpu_crtc->crtc_offset,
               upper_32_bits(fb_location));
        WREG32(mmGRPH_PRIMARY_SURFACE_ADDRESS + amdgpu_crtc->crtc_offset,
               (u32)fb_location & GRPH_PRIMARY_SURFACE_ADDRESS__GRPH_PRIMARY_SURFACE_ADDRESS_MASK);
        WREG32(mmGRPH_SECONDARY_SURFACE_ADDRESS + amdgpu_crtc->crtc_offset,
               (u32) fb_location & GRPH_PRIMARY_SURFACE_ADDRESS__GRPH_PRIMARY_SURFACE_ADDRESS_MASK);
        WREG32(mmGRPH_CONTROL + amdgpu_crtc->crtc_offset, fb_format);
        WREG32(mmGRPH_SWAP_CNTL + amdgpu_crtc->crtc_offset, fb_swap);

        /*
         * The LUT only has 256 slots for indexing by a 8 bpc fb. Bypass the LUT
         * for > 8 bpc scanout to avoid truncation of fb indices to 8 msb's, to
         * retain the full precision throughout the pipeline.
         */
        WREG32_P(mmGRPH_LUT_10BIT_BYPASS + amdgpu_crtc->crtc_offset,
                 (bypass_lut ? GRPH_LUT_10BIT_BYPASS__GRPH_LUT_10BIT_BYPASS_EN_MASK : 0),
                 ~GRPH_LUT_10BIT_BYPASS__GRPH_LUT_10BIT_BYPASS_EN_MASK);

        if (bypass_lut)
                DRM_DEBUG_KMS("Bypassing hardware LUT due to 10 bit fb scanout.\n");

        WREG32(mmGRPH_SURFACE_OFFSET_X + amdgpu_crtc->crtc_offset, 0);
        WREG32(mmGRPH_SURFACE_OFFSET_Y + amdgpu_crtc->crtc_offset, 0);
        WREG32(mmGRPH_X_START + amdgpu_crtc->crtc_offset, 0);
        WREG32(mmGRPH_Y_START + amdgpu_crtc->crtc_offset, 0);
        WREG32(mmGRPH_X_END + amdgpu_crtc->crtc_offset, target_fb->width);
        WREG32(mmGRPH_Y_END + amdgpu_crtc->crtc_offset, target_fb->height);

        fb_pitch_pixels = target_fb->pitches[0] / (target_fb->bits_per_pixel / 8);
        WREG32(mmGRPH_PITCH + amdgpu_crtc->crtc_offset, fb_pitch_pixels);

        dce_v6_0_grph_enable(crtc, true);

        WREG32(mmDESKTOP_HEIGHT + amdgpu_crtc->crtc_offset,
                       target_fb->height);
        x &= ~3;
        y &= ~1;
        WREG32(mmVIEWPORT_START + amdgpu_crtc->crtc_offset,
               (x << 16) | y);
        viewport_w = crtc->mode.hdisplay;
        viewport_h = (crtc->mode.vdisplay + 1) & ~1;

        WREG32(mmVIEWPORT_SIZE + amdgpu_crtc->crtc_offset,
               (viewport_w << 16) | viewport_h);

        /* set pageflip to happen anywhere in vblank interval */
        WREG32(mmMASTER_UPDATE_MODE + amdgpu_crtc->crtc_offset, 0);

        if (!atomic && fb && fb != crtc->primary->fb) {
                amdgpu_fb = to_amdgpu_framebuffer(fb);
                abo = gem_to_amdgpu_bo(amdgpu_fb->obj);
                r = amdgpu_bo_reserve(abo, false);
                if (unlikely(r != 0))
                        return r;
                amdgpu_bo_unpin(abo);
                amdgpu_bo_unreserve(abo);
        }

        /* Bytes per pixel may have changed */
        dce_v6_0_bandwidth_update(adev);

        return 0;

}

static void dce_v6_0_set_interleave(struct drm_crtc *crtc,
                                    struct drm_display_mode *mode)
{
        struct drm_device *dev = crtc->dev;
        struct amdgpu_device *adev = dev->dev_private;
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);

        if (mode->flags & DRM_MODE_FLAG_INTERLACE)
                WREG32(mmDATA_FORMAT + amdgpu_crtc->crtc_offset,
                       INTERLEAVE_EN);
        else
                WREG32(mmDATA_FORMAT + amdgpu_crtc->crtc_offset, 0);
}

static void dce_v6_0_crtc_load_lut(struct drm_crtc *crtc)
{

        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        struct drm_device *dev = crtc->dev;
        struct amdgpu_device *adev = dev->dev_private;
        int i;

        DRM_DEBUG_KMS("%d\n", amdgpu_crtc->crtc_id);

        WREG32(mmINPUT_CSC_CONTROL + amdgpu_crtc->crtc_offset,
               ((0 << INPUT_CSC_CONTROL__INPUT_CSC_GRPH_MODE__SHIFT) |
                (0 << INPUT_CSC_CONTROL__INPUT_CSC_OVL_MODE__SHIFT)));
        WREG32(mmPRESCALE_GRPH_CONTROL + amdgpu_crtc->crtc_offset,
               PRESCALE_GRPH_CONTROL__GRPH_PRESCALE_BYPASS_MASK);
        WREG32(mmPRESCALE_OVL_CONTROL + amdgpu_crtc->crtc_offset,
               PRESCALE_OVL_CONTROL__OVL_PRESCALE_BYPASS_MASK);
        WREG32(mmINPUT_GAMMA_CONTROL + amdgpu_crtc->crtc_offset,
               ((0 << INPUT_GAMMA_CONTROL__GRPH_INPUT_GAMMA_MODE__SHIFT) |
                (0 << INPUT_GAMMA_CONTROL__OVL_INPUT_GAMMA_MODE__SHIFT)));

        WREG32(mmDC_LUT_CONTROL + amdgpu_crtc->crtc_offset, 0);

        WREG32(mmDC_LUT_BLACK_OFFSET_BLUE + amdgpu_crtc->crtc_offset, 0);
        WREG32(mmDC_LUT_BLACK_OFFSET_GREEN + amdgpu_crtc->crtc_offset, 0);
        WREG32(mmDC_LUT_BLACK_OFFSET_RED + amdgpu_crtc->crtc_offset, 0);

        WREG32(mmDC_LUT_WHITE_OFFSET_BLUE + amdgpu_crtc->crtc_offset, 0xffff);
        WREG32(mmDC_LUT_WHITE_OFFSET_GREEN + amdgpu_crtc->crtc_offset, 0xffff);
        WREG32(mmDC_LUT_WHITE_OFFSET_RED + amdgpu_crtc->crtc_offset, 0xffff);

        WREG32(mmDC_LUT_RW_MODE + amdgpu_crtc->crtc_offset, 0);
        WREG32(mmDC_LUT_WRITE_EN_MASK + amdgpu_crtc->crtc_offset, 0x00000007);

        WREG32(mmDC_LUT_RW_INDEX + amdgpu_crtc->crtc_offset, 0);
        for (i = 0; i < 256; i++) {
                WREG32(mmDC_LUT_30_COLOR + amdgpu_crtc->crtc_offset,
                       (amdgpu_crtc->lut_r[i] << 20) |
                       (amdgpu_crtc->lut_g[i] << 10) |
                       (amdgpu_crtc->lut_b[i] << 0));
        }

        WREG32(mmDEGAMMA_CONTROL + amdgpu_crtc->crtc_offset,
               ((0 << DEGAMMA_CONTROL__GRPH_DEGAMMA_MODE__SHIFT) |
                (0 << DEGAMMA_CONTROL__OVL_DEGAMMA_MODE__SHIFT) |
                ICON_DEGAMMA_MODE(0) |
                (0 << DEGAMMA_CONTROL__CURSOR_DEGAMMA_MODE__SHIFT)));
        WREG32(mmGAMUT_REMAP_CONTROL + amdgpu_crtc->crtc_offset,
               ((0 << GAMUT_REMAP_CONTROL__GRPH_GAMUT_REMAP_MODE__SHIFT) |
                (0 << GAMUT_REMAP_CONTROL__OVL_GAMUT_REMAP_MODE__SHIFT)));
        WREG32(mmREGAMMA_CONTROL + amdgpu_crtc->crtc_offset,
               ((0 << REGAMMA_CONTROL__GRPH_REGAMMA_MODE__SHIFT) |
                (0 << REGAMMA_CONTROL__OVL_REGAMMA_MODE__SHIFT)));
        WREG32(mmOUTPUT_CSC_CONTROL + amdgpu_crtc->crtc_offset,
               ((0 << OUTPUT_CSC_CONTROL__OUTPUT_CSC_GRPH_MODE__SHIFT) |
                (0 << OUTPUT_CSC_CONTROL__OUTPUT_CSC_OVL_MODE__SHIFT)));
        /* XXX match this to the depth of the crtc fmt block, move to modeset? */
        WREG32(0x1a50 + amdgpu_crtc->crtc_offset, 0);


}

static int dce_v6_0_pick_dig_encoder(struct drm_encoder *encoder)
{
        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
        struct amdgpu_encoder_atom_dig *dig = amdgpu_encoder->enc_priv;

        switch (amdgpu_encoder->encoder_id) {
        case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
                return dig->linkb ? 1 : 0;
        case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
                return dig->linkb ? 3 : 2;
        case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
                return dig->linkb ? 5 : 4;
        case ENCODER_OBJECT_ID_INTERNAL_UNIPHY3:
                return 6;
        default:
                DRM_ERROR("invalid encoder_id: 0x%x\n", amdgpu_encoder->encoder_id);
                return 0;
        }
}

/**
 * dce_v6_0_pick_pll - Allocate a PPLL for use by the crtc.
 *
 * @crtc: drm crtc
 *
 * Returns the PPLL (Pixel PLL) to be used by the crtc.  For DP monitors
 * a single PPLL can be used for all DP crtcs/encoders.  For non-DP
 * monitors a dedicated PPLL must be used.  If a particular board has
 * an external DP PLL, return ATOM_PPLL_INVALID to skip PLL programming
 * as there is no need to program the PLL itself.  If we are not able to
 * allocate a PLL, return ATOM_PPLL_INVALID to skip PLL programming to
 * avoid messing up an existing monitor.
 *
 *
 */
static u32 dce_v6_0_pick_pll(struct drm_crtc *crtc)
{
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        struct drm_device *dev = crtc->dev;
        struct amdgpu_device *adev = dev->dev_private;
        u32 pll_in_use;
        int pll;

        if (ENCODER_MODE_IS_DP(amdgpu_atombios_encoder_get_encoder_mode(amdgpu_crtc->encoder))) {
                if (adev->clock.dp_extclk)
                        /* skip PPLL programming if using ext clock */
                        return ATOM_PPLL_INVALID;
                else
                        return ATOM_PPLL0;
        } else {
                /* use the same PPLL for all monitors with the same clock */
                pll = amdgpu_pll_get_shared_nondp_ppll(crtc);
                if (pll != ATOM_PPLL_INVALID)
                        return pll;
        }

        /*  PPLL1, and PPLL2 */
        pll_in_use = amdgpu_pll_get_use_mask(crtc);
        if (!(pll_in_use & (1 << ATOM_PPLL2)))
                return ATOM_PPLL2;
        if (!(pll_in_use & (1 << ATOM_PPLL1)))
                return ATOM_PPLL1;
        DRM_ERROR("unable to allocate a PPLL\n");
        return ATOM_PPLL_INVALID;
}

static void dce_v6_0_lock_cursor(struct drm_crtc *crtc, bool lock)
{
        struct amdgpu_device *adev = crtc->dev->dev_private;
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        uint32_t cur_lock;

        cur_lock = RREG32(mmCUR_UPDATE + amdgpu_crtc->crtc_offset);
        if (lock)
                cur_lock |= CUR_UPDATE__CURSOR_UPDATE_LOCK_MASK;
        else
                cur_lock &= ~CUR_UPDATE__CURSOR_UPDATE_LOCK_MASK;
        WREG32(mmCUR_UPDATE + amdgpu_crtc->crtc_offset, cur_lock);
}

static void dce_v6_0_hide_cursor(struct drm_crtc *crtc)
{
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        struct amdgpu_device *adev = crtc->dev->dev_private;

        WREG32_IDX(mmCUR_CONTROL + amdgpu_crtc->crtc_offset,
                   (CURSOR_24_8_PRE_MULT << CUR_CONTROL__CURSOR_MODE__SHIFT) |
                   (CURSOR_URGENT_1_2 << CUR_CONTROL__CURSOR_URGENT_CONTROL__SHIFT));


}

static void dce_v6_0_show_cursor(struct drm_crtc *crtc)
{
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        struct amdgpu_device *adev = crtc->dev->dev_private;

        WREG32(mmCUR_SURFACE_ADDRESS_HIGH + amdgpu_crtc->crtc_offset,
               upper_32_bits(amdgpu_crtc->cursor_addr));
        WREG32(mmCUR_SURFACE_ADDRESS + amdgpu_crtc->crtc_offset,
               lower_32_bits(amdgpu_crtc->cursor_addr));

        WREG32_IDX(mmCUR_CONTROL + amdgpu_crtc->crtc_offset,
                   CUR_CONTROL__CURSOR_EN_MASK |
                   (CURSOR_24_8_PRE_MULT << CUR_CONTROL__CURSOR_MODE__SHIFT) |
                   (CURSOR_URGENT_1_2 << CUR_CONTROL__CURSOR_URGENT_CONTROL__SHIFT));

}

static int dce_v6_0_cursor_move_locked(struct drm_crtc *crtc,
                                       int x, int y)
{
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        struct amdgpu_device *adev = crtc->dev->dev_private;
        int xorigin = 0, yorigin = 0;

        int w = amdgpu_crtc->cursor_width;

        amdgpu_crtc->cursor_x = x;
        amdgpu_crtc->cursor_y = y;

        /* avivo cursor are offset into the total surface */
        x += crtc->x;
        y += crtc->y;
        DRM_DEBUG("x %d y %d c->x %d c->y %d\n", x, y, crtc->x, crtc->y);

        if (x < 0) {
                xorigin = min(-x, amdgpu_crtc->max_cursor_width - 1);
                x = 0;
        }
        if (y < 0) {
                yorigin = min(-y, amdgpu_crtc->max_cursor_height - 1);
                y = 0;
        }

        WREG32(mmCUR_POSITION + amdgpu_crtc->crtc_offset, (x << 16) | y);
        WREG32(mmCUR_HOT_SPOT + amdgpu_crtc->crtc_offset, (xorigin << 16) | yorigin);
        WREG32(mmCUR_SIZE + amdgpu_crtc->crtc_offset,
               ((w - 1) << 16) | (amdgpu_crtc->cursor_height - 1));

        return 0;
}

static int dce_v6_0_crtc_cursor_move(struct drm_crtc *crtc,
                                     int x, int y)
{
        int ret;

        dce_v6_0_lock_cursor(crtc, true);
        ret = dce_v6_0_cursor_move_locked(crtc, x, y);
        dce_v6_0_lock_cursor(crtc, false);

        return ret;
}

static int dce_v6_0_crtc_cursor_set2(struct drm_crtc *crtc,
                                     struct drm_file *file_priv,
                                     uint32_t handle,
                                     uint32_t width,
                                     uint32_t height,
                                     int32_t hot_x,
                                     int32_t hot_y)
{
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        struct drm_gem_object *obj;
        struct amdgpu_bo *aobj;
        int ret;

        if (!handle) {
                /* turn off cursor */
                dce_v6_0_hide_cursor(crtc);
                obj = NULL;
                goto unpin;
        }

        if ((width > amdgpu_crtc->max_cursor_width) ||
            (height > amdgpu_crtc->max_cursor_height)) {
                DRM_ERROR("bad cursor width or height %d x %d\n", width, height);
                return -EINVAL;
        }

        obj = drm_gem_object_lookup(file_priv, handle);
        if (!obj) {
                DRM_ERROR("Cannot find cursor object %x for crtc %d\n", handle, amdgpu_crtc->crtc_id);
                return -ENOENT;
        }

        aobj = gem_to_amdgpu_bo(obj);
        ret = amdgpu_bo_reserve(aobj, false);
        if (ret != 0) {
                drm_gem_object_unreference_unlocked(obj);
                return ret;
        }

        ret = amdgpu_bo_pin(aobj, AMDGPU_GEM_DOMAIN_VRAM, &amdgpu_crtc->cursor_addr);
        amdgpu_bo_unreserve(aobj);
        if (ret) {
                DRM_ERROR("Failed to pin new cursor BO (%d)\n", ret);
                drm_gem_object_unreference_unlocked(obj);
                return ret;
        }

        dce_v6_0_lock_cursor(crtc, true);

        if (width != amdgpu_crtc->cursor_width ||
            height != amdgpu_crtc->cursor_height ||
            hot_x != amdgpu_crtc->cursor_hot_x ||
            hot_y != amdgpu_crtc->cursor_hot_y) {
                int x, y;

                x = amdgpu_crtc->cursor_x + amdgpu_crtc->cursor_hot_x - hot_x;
                y = amdgpu_crtc->cursor_y + amdgpu_crtc->cursor_hot_y - hot_y;

                dce_v6_0_cursor_move_locked(crtc, x, y);

                amdgpu_crtc->cursor_width = width;
                amdgpu_crtc->cursor_height = height;
                amdgpu_crtc->cursor_hot_x = hot_x;
                amdgpu_crtc->cursor_hot_y = hot_y;
        }

        dce_v6_0_show_cursor(crtc);
        dce_v6_0_lock_cursor(crtc, false);

unpin:
        if (amdgpu_crtc->cursor_bo) {
                struct amdgpu_bo *aobj = gem_to_amdgpu_bo(amdgpu_crtc->cursor_bo);
                ret = amdgpu_bo_reserve(aobj, false);
                if (likely(ret == 0)) {
                        amdgpu_bo_unpin(aobj);
                        amdgpu_bo_unreserve(aobj);
                }
                drm_gem_object_unreference_unlocked(amdgpu_crtc->cursor_bo);
        }

        amdgpu_crtc->cursor_bo = obj;
        return 0;
}

static void dce_v6_0_cursor_reset(struct drm_crtc *crtc)
{
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);

        if (amdgpu_crtc->cursor_bo) {
                dce_v6_0_lock_cursor(crtc, true);

                dce_v6_0_cursor_move_locked(crtc, amdgpu_crtc->cursor_x,
                                            amdgpu_crtc->cursor_y);

                dce_v6_0_show_cursor(crtc);
                dce_v6_0_lock_cursor(crtc, false);
        }
}

static int dce_v6_0_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,

                                   u16 *blue, uint32_t size)
{
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        int i;

        /* userspace palettes are always correct as is */
        for (i = 0; i < size; i++) {
                amdgpu_crtc->lut_r[i] = red[i] >> 6;
                amdgpu_crtc->lut_g[i] = green[i] >> 6;
                amdgpu_crtc->lut_b[i] = blue[i] >> 6;
        }
        dce_v6_0_crtc_load_lut(crtc);

        return 0;
}

static void dce_v6_0_crtc_destroy(struct drm_crtc *crtc)
{
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);

        drm_crtc_cleanup(crtc);
        kfree(amdgpu_crtc);
}

static const struct drm_crtc_funcs dce_v6_0_crtc_funcs = {
        .cursor_set2 = dce_v6_0_crtc_cursor_set2,
        .cursor_move = dce_v6_0_crtc_cursor_move,
        .gamma_set = dce_v6_0_crtc_gamma_set,
        .set_config = amdgpu_crtc_set_config,
        .destroy = dce_v6_0_crtc_destroy,
        .page_flip_target = amdgpu_crtc_page_flip_target,
};

static void dce_v6_0_crtc_dpms(struct drm_crtc *crtc, int mode)
{
        struct drm_device *dev = crtc->dev;
        struct amdgpu_device *adev = dev->dev_private;
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        unsigned type;

        switch (mode) {
        case DRM_MODE_DPMS_ON:
                amdgpu_crtc->enabled = true;
                amdgpu_atombios_crtc_enable(crtc, ATOM_ENABLE);
                amdgpu_atombios_crtc_blank(crtc, ATOM_DISABLE);
                /* Make sure VBLANK and PFLIP interrupts are still enabled */
                type = amdgpu_crtc_idx_to_irq_type(adev, amdgpu_crtc->crtc_id);
                amdgpu_irq_update(adev, &adev->crtc_irq, type);
                amdgpu_irq_update(adev, &adev->pageflip_irq, type);
                drm_crtc_vblank_on(crtc);
                dce_v6_0_crtc_load_lut(crtc);
                break;
        case DRM_MODE_DPMS_STANDBY:
        case DRM_MODE_DPMS_SUSPEND:
        case DRM_MODE_DPMS_OFF:
                drm_crtc_vblank_off(crtc);
                if (amdgpu_crtc->enabled)
                        amdgpu_atombios_crtc_blank(crtc, ATOM_ENABLE);
                amdgpu_atombios_crtc_enable(crtc, ATOM_DISABLE);
                amdgpu_crtc->enabled = false;
                break;
        }
        /* adjust pm to dpms */
        amdgpu_pm_compute_clocks(adev);
}

static void dce_v6_0_crtc_prepare(struct drm_crtc *crtc)
{
        /* disable crtc pair power gating before programming */
        amdgpu_atombios_crtc_powergate(crtc, ATOM_DISABLE);
        amdgpu_atombios_crtc_lock(crtc, ATOM_ENABLE);
        dce_v6_0_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
}

static void dce_v6_0_crtc_commit(struct drm_crtc *crtc)
{
        dce_v6_0_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
        amdgpu_atombios_crtc_lock(crtc, ATOM_DISABLE);
}

static void dce_v6_0_crtc_disable(struct drm_crtc *crtc)
{

        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        struct drm_device *dev = crtc->dev;
        struct amdgpu_device *adev = dev->dev_private;
        struct amdgpu_atom_ss ss;
        int i;

        dce_v6_0_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
        if (crtc->primary->fb) {
                int r;
                struct amdgpu_framebuffer *amdgpu_fb;
                struct amdgpu_bo *abo;

                amdgpu_fb = to_amdgpu_framebuffer(crtc->primary->fb);
                abo = gem_to_amdgpu_bo(amdgpu_fb->obj);
                r = amdgpu_bo_reserve(abo, false);
                if (unlikely(r))
                        DRM_ERROR("failed to reserve abo before unpin\n");
                else {
                        amdgpu_bo_unpin(abo);
                        amdgpu_bo_unreserve(abo);
                }
        }
        /* disable the GRPH */
        dce_v6_0_grph_enable(crtc, false);

        amdgpu_atombios_crtc_powergate(crtc, ATOM_ENABLE);

        for (i = 0; i < adev->mode_info.num_crtc; i++) {
                if (adev->mode_info.crtcs[i] &&
                    adev->mode_info.crtcs[i]->enabled &&
                    i != amdgpu_crtc->crtc_id &&
                    amdgpu_crtc->pll_id == adev->mode_info.crtcs[i]->pll_id) {
                        /* one other crtc is using this pll don't turn
                         * off the pll
                         */
                        goto done;
                }
        }

        switch (amdgpu_crtc->pll_id) {
        case ATOM_PPLL1:
        case ATOM_PPLL2:
                /* disable the ppll */
                amdgpu_atombios_crtc_program_pll(crtc, amdgpu_crtc->crtc_id, amdgpu_crtc->pll_id,
                                                 0, 0, ATOM_DISABLE, 0, 0, 0, 0, 0, false, &ss);
                break;
        default:
                break;
        }
done:
        amdgpu_crtc->pll_id = ATOM_PPLL_INVALID;
        amdgpu_crtc->adjusted_clock = 0;
        amdgpu_crtc->encoder = NULL;
        amdgpu_crtc->connector = NULL;
}

static int dce_v6_0_crtc_mode_set(struct drm_crtc *crtc,
                                  struct drm_display_mode *mode,
                                  struct drm_display_mode *adjusted_mode,
                                  int x, int y, struct drm_framebuffer *old_fb)
{
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);

        if (!amdgpu_crtc->adjusted_clock)
                return -EINVAL;

        amdgpu_atombios_crtc_set_pll(crtc, adjusted_mode);
        amdgpu_atombios_crtc_set_dtd_timing(crtc, adjusted_mode);
        dce_v6_0_crtc_do_set_base(crtc, old_fb, x, y, 0);
        amdgpu_atombios_crtc_overscan_setup(crtc, mode, adjusted_mode);
        amdgpu_atombios_crtc_scaler_setup(crtc);
        dce_v6_0_cursor_reset(crtc);
        /* update the hw version fpr dpm */
        amdgpu_crtc->hw_mode = *adjusted_mode;

        return 0;
}

static bool dce_v6_0_crtc_mode_fixup(struct drm_crtc *crtc,
                                     const struct drm_display_mode *mode,
                                     struct drm_display_mode *adjusted_mode)
{

        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        struct drm_device *dev = crtc->dev;
        struct drm_encoder *encoder;

        /* assign the encoder to the amdgpu crtc to avoid repeated lookups later */
        list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
                if (encoder->crtc == crtc) {
                        amdgpu_crtc->encoder = encoder;
                        amdgpu_crtc->connector = amdgpu_get_connector_for_encoder(encoder);
                        break;
                }
        }
        if ((amdgpu_crtc->encoder == NULL) || (amdgpu_crtc->connector == NULL)) {
                amdgpu_crtc->encoder = NULL;
                amdgpu_crtc->connector = NULL;
                return false;
        }
        if (!amdgpu_crtc_scaling_mode_fixup(crtc, mode, adjusted_mode))
                return false;
        if (amdgpu_atombios_crtc_prepare_pll(crtc, adjusted_mode))
                return false;
        /* pick pll */
        amdgpu_crtc->pll_id = dce_v6_0_pick_pll(crtc);
        /* if we can't get a PPLL for a non-DP encoder, fail */
        if ((amdgpu_crtc->pll_id == ATOM_PPLL_INVALID) &&
            !ENCODER_MODE_IS_DP(amdgpu_atombios_encoder_get_encoder_mode(amdgpu_crtc->encoder)))
                return false;

        return true;
}

static int dce_v6_0_crtc_set_base(struct drm_crtc *crtc, int x, int y,
                                  struct drm_framebuffer *old_fb)
{
        return dce_v6_0_crtc_do_set_base(crtc, old_fb, x, y, 0);
}

static int dce_v6_0_crtc_set_base_atomic(struct drm_crtc *crtc,
                                         struct drm_framebuffer *fb,
                                         int x, int y, enum mode_set_atomic state)
{
       return dce_v6_0_crtc_do_set_base(crtc, fb, x, y, 1);
}

static const struct drm_crtc_helper_funcs dce_v6_0_crtc_helper_funcs = {
        .dpms = dce_v6_0_crtc_dpms,
        .mode_fixup = dce_v6_0_crtc_mode_fixup,
        .mode_set = dce_v6_0_crtc_mode_set,
        .mode_set_base = dce_v6_0_crtc_set_base,
        .mode_set_base_atomic = dce_v6_0_crtc_set_base_atomic,
        .prepare = dce_v6_0_crtc_prepare,
        .commit = dce_v6_0_crtc_commit,
        .load_lut = dce_v6_0_crtc_load_lut,
        .disable = dce_v6_0_crtc_disable,
};

static int dce_v6_0_crtc_init(struct amdgpu_device *adev, int index)
{
        struct amdgpu_crtc *amdgpu_crtc;
        int i;

        amdgpu_crtc = kzalloc(sizeof(struct amdgpu_crtc) +
                              (AMDGPUFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
        if (amdgpu_crtc == NULL)
                return -ENOMEM;

        drm_crtc_init(adev->ddev, &amdgpu_crtc->base, &dce_v6_0_crtc_funcs);

        drm_mode_crtc_set_gamma_size(&amdgpu_crtc->base, 256);
        amdgpu_crtc->crtc_id = index;
        adev->mode_info.crtcs[index] = amdgpu_crtc;

        amdgpu_crtc->max_cursor_width = CURSOR_WIDTH;
        amdgpu_crtc->max_cursor_height = CURSOR_HEIGHT;
        adev->ddev->mode_config.cursor_width = amdgpu_crtc->max_cursor_width;
        adev->ddev->mode_config.cursor_height = amdgpu_crtc->max_cursor_height;

        for (i = 0; i < 256; i++) {
                amdgpu_crtc->lut_r[i] = i << 2;
                amdgpu_crtc->lut_g[i] = i << 2;
                amdgpu_crtc->lut_b[i] = i << 2;
        }

        amdgpu_crtc->crtc_offset = crtc_offsets[amdgpu_crtc->crtc_id];

        amdgpu_crtc->pll_id = ATOM_PPLL_INVALID;
        amdgpu_crtc->adjusted_clock = 0;
        amdgpu_crtc->encoder = NULL;
        amdgpu_crtc->connector = NULL;
        drm_crtc_helper_add(&amdgpu_crtc->base, &dce_v6_0_crtc_helper_funcs);

        return 0;
}

static int dce_v6_0_early_init(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        adev->audio_endpt_rreg = &dce_v6_0_audio_endpt_rreg;
        adev->audio_endpt_wreg = &dce_v6_0_audio_endpt_wreg;

        dce_v6_0_set_display_funcs(adev);
        dce_v6_0_set_irq_funcs(adev);

        adev->mode_info.num_crtc = dce_v6_0_get_num_crtc(adev);

        switch (adev->asic_type) {
        case CHIP_TAHITI:
        case CHIP_PITCAIRN:
        case CHIP_VERDE:
                adev->mode_info.num_hpd = 6;
                adev->mode_info.num_dig = 6;
                break;
        case CHIP_OLAND:
                adev->mode_info.num_hpd = 2;
                adev->mode_info.num_dig = 2;
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static int dce_v6_0_sw_init(void *handle)
{
        int r, i;
        bool ret;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        for (i = 0; i < adev->mode_info.num_crtc; i++) {
                r = amdgpu_irq_add_id(adev, i + 1, &adev->crtc_irq);
                if (r)
                        return r;
        }

        for (i = 8; i < 20; i += 2) {
                r = amdgpu_irq_add_id(adev, i, &adev->pageflip_irq);
                if (r)
                        return r;
        }

        /* HPD hotplug */
        r = amdgpu_irq_add_id(adev, 42, &adev->hpd_irq);
        if (r)
                return r;

        adev->mode_info.mode_config_initialized = true;

        adev->ddev->mode_config.funcs = &amdgpu_mode_funcs;
        adev->ddev->mode_config.async_page_flip = true;
        adev->ddev->mode_config.max_width = 16384;
        adev->ddev->mode_config.max_height = 16384;
        adev->ddev->mode_config.preferred_depth = 24;
        adev->ddev->mode_config.prefer_shadow = 1;
        adev->ddev->mode_config.fb_base = adev->mc.aper_base;

        r = amdgpu_modeset_create_props(adev);
        if (r)
                return r;

        adev->ddev->mode_config.max_width = 16384;
        adev->ddev->mode_config.max_height = 16384;

        /* allocate crtcs */
        for (i = 0; i < adev->mode_info.num_crtc; i++) {
                r = dce_v6_0_crtc_init(adev, i);
                if (r)
                        return r;
        }

        ret = amdgpu_atombios_get_connector_info_from_object_table(adev);
        if (ret)
                amdgpu_print_display_setup(adev->ddev);
        else
                return -EINVAL;

        /* setup afmt */
        r = dce_v6_0_afmt_init(adev);
        if (r)
                return r;

        r = dce_v6_0_audio_init(adev);
        if (r)
                return r;

        drm_kms_helper_poll_init(adev->ddev);

        return r;
}

static int dce_v6_0_sw_fini(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        kfree(adev->mode_info.bios_hardcoded_edid);

        drm_kms_helper_poll_fini(adev->ddev);

        dce_v6_0_audio_fini(adev);
        dce_v6_0_afmt_fini(adev);

        drm_mode_config_cleanup(adev->ddev);
        adev->mode_info.mode_config_initialized = false;

        return 0;
}

static int dce_v6_0_hw_init(void *handle)
{
        int i;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        /* init dig PHYs, disp eng pll */
        amdgpu_atombios_encoder_init_dig(adev);
        amdgpu_atombios_crtc_set_disp_eng_pll(adev, adev->clock.default_dispclk);

        /* initialize hpd */
        dce_v6_0_hpd_init(adev);

        for (i = 0; i < adev->mode_info.audio.num_pins; i++) {
                dce_v6_0_audio_enable(adev, &adev->mode_info.audio.pin[i], false);
        }

        dce_v6_0_pageflip_interrupt_init(adev);

        return 0;
}

static int dce_v6_0_hw_fini(void *handle)
{
        int i;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        dce_v6_0_hpd_fini(adev);

        for (i = 0; i < adev->mode_info.audio.num_pins; i++) {
                dce_v6_0_audio_enable(adev, &adev->mode_info.audio.pin[i], false);
        }

        dce_v6_0_pageflip_interrupt_fini(adev);

        return 0;
}

static int dce_v6_0_suspend(void *handle)
{
        return dce_v6_0_hw_fini(handle);
}

static int dce_v6_0_resume(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
        int ret;

        ret = dce_v6_0_hw_init(handle);

        /* turn on the BL */
        if (adev->mode_info.bl_encoder) {
                u8 bl_level = amdgpu_display_backlight_get_level(adev,
                                                                  adev->mode_info.bl_encoder);
                amdgpu_display_backlight_set_level(adev, adev->mode_info.bl_encoder,
                                                    bl_level);
        }

        return ret;
}

static bool dce_v6_0_is_idle(void *handle)
{
        return true;
}

static int dce_v6_0_wait_for_idle(void *handle)
{
        return 0;
}

static int dce_v6_0_soft_reset(void *handle)
{
        DRM_INFO("xxxx: dce_v6_0_soft_reset --- no impl!!\n");
        return 0;
}

static void dce_v6_0_set_crtc_vblank_interrupt_state(struct amdgpu_device *adev,
                                                     int crtc,
                                                     enum amdgpu_interrupt_state state)
{
        u32 reg_block, interrupt_mask;

        if (crtc >= adev->mode_info.num_crtc) {
                DRM_DEBUG("invalid crtc %d\n", crtc);
                return;
        }

        switch (crtc) {
        case 0:
                reg_block = SI_CRTC0_REGISTER_OFFSET;
                break;
        case 1:
                reg_block = SI_CRTC1_REGISTER_OFFSET;
                break;
        case 2:
                reg_block = SI_CRTC2_REGISTER_OFFSET;
                break;
        case 3:
                reg_block = SI_CRTC3_REGISTER_OFFSET;
                break;
        case 4:
                reg_block = SI_CRTC4_REGISTER_OFFSET;
                break;
        case 5:
                reg_block = SI_CRTC5_REGISTER_OFFSET;
                break;
        default:
                DRM_DEBUG("invalid crtc %d\n", crtc);
                return;
        }

        switch (state) {
        case AMDGPU_IRQ_STATE_DISABLE:
                interrupt_mask = RREG32(mmINT_MASK + reg_block);
                interrupt_mask &= ~VBLANK_INT_MASK;
                WREG32(mmINT_MASK + reg_block, interrupt_mask);
                break;
        case AMDGPU_IRQ_STATE_ENABLE:
                interrupt_mask = RREG32(mmINT_MASK + reg_block);
                interrupt_mask |= VBLANK_INT_MASK;
                WREG32(mmINT_MASK + reg_block, interrupt_mask);
                break;
        default:
                break;
        }
}

static void dce_v6_0_set_crtc_vline_interrupt_state(struct amdgpu_device *adev,
                                                    int crtc,
                                                    enum amdgpu_interrupt_state state)
{

}

static int dce_v6_0_set_hpd_interrupt_state(struct amdgpu_device *adev,
                                            struct amdgpu_irq_src *src,
                                            unsigned type,
                                            enum amdgpu_interrupt_state state)
{
        u32 dc_hpd_int_cntl;

        if (type >= adev->mode_info.num_hpd) {
                DRM_DEBUG("invalid hdp %d\n", type);
                return 0;
        }

        switch (state) {
        case AMDGPU_IRQ_STATE_DISABLE:
                dc_hpd_int_cntl = RREG32(mmDC_HPD1_INT_CONTROL + hpd_offsets[type]);
                dc_hpd_int_cntl &= ~DC_HPDx_INT_EN;
                WREG32(mmDC_HPD1_INT_CONTROL + hpd_offsets[type], dc_hpd_int_cntl);
                break;
        case AMDGPU_IRQ_STATE_ENABLE:
                dc_hpd_int_cntl = RREG32(mmDC_HPD1_INT_CONTROL + hpd_offsets[type]);
                dc_hpd_int_cntl |= DC_HPDx_INT_EN;
                WREG32(mmDC_HPD1_INT_CONTROL + hpd_offsets[type], dc_hpd_int_cntl);
                break;
        default:
                break;
        }

        return 0;
}

static int dce_v6_0_set_crtc_interrupt_state(struct amdgpu_device *adev,
                                             struct amdgpu_irq_src *src,
                                             unsigned type,
                                             enum amdgpu_interrupt_state state)
{
        switch (type) {
        case AMDGPU_CRTC_IRQ_VBLANK1:
                dce_v6_0_set_crtc_vblank_interrupt_state(adev, 0, state);
                break;
        case AMDGPU_CRTC_IRQ_VBLANK2:
                dce_v6_0_set_crtc_vblank_interrupt_state(adev, 1, state);
                break;
        case AMDGPU_CRTC_IRQ_VBLANK3:
                dce_v6_0_set_crtc_vblank_interrupt_state(adev, 2, state);
                break;
        case AMDGPU_CRTC_IRQ_VBLANK4:
                dce_v6_0_set_crtc_vblank_interrupt_state(adev, 3, state);
                break;
        case AMDGPU_CRTC_IRQ_VBLANK5:
                dce_v6_0_set_crtc_vblank_interrupt_state(adev, 4, state);
                break;
        case AMDGPU_CRTC_IRQ_VBLANK6:
                dce_v6_0_set_crtc_vblank_interrupt_state(adev, 5, state);
                break;
        case AMDGPU_CRTC_IRQ_VLINE1:
                dce_v6_0_set_crtc_vline_interrupt_state(adev, 0, state);
                break;
        case AMDGPU_CRTC_IRQ_VLINE2:
                dce_v6_0_set_crtc_vline_interrupt_state(adev, 1, state);
                break;
        case AMDGPU_CRTC_IRQ_VLINE3:
                dce_v6_0_set_crtc_vline_interrupt_state(adev, 2, state);
                break;
        case AMDGPU_CRTC_IRQ_VLINE4:
                dce_v6_0_set_crtc_vline_interrupt_state(adev, 3, state);
                break;
        case AMDGPU_CRTC_IRQ_VLINE5:
                dce_v6_0_set_crtc_vline_interrupt_state(adev, 4, state);
                break;
        case AMDGPU_CRTC_IRQ_VLINE6:
                dce_v6_0_set_crtc_vline_interrupt_state(adev, 5, state);
                break;
        default:
                break;
        }
        return 0;
}

static int dce_v6_0_crtc_irq(struct amdgpu_device *adev,
                             struct amdgpu_irq_src *source,
                             struct amdgpu_iv_entry *entry)
{
        unsigned crtc = entry->src_id - 1;
        uint32_t disp_int = RREG32(interrupt_status_offsets[crtc].reg);
        unsigned irq_type = amdgpu_crtc_idx_to_irq_type(adev, crtc);

        switch (entry->src_data) {
        case 0: /* vblank */
                if (disp_int & interrupt_status_offsets[crtc].vblank)
                        WREG32(mmVBLANK_STATUS + crtc_offsets[crtc], VBLANK_ACK);
                else
                        DRM_DEBUG("IH: IH event w/o asserted irq bit?\n");

                if (amdgpu_irq_enabled(adev, source, irq_type)) {
                        drm_handle_vblank(adev->ddev, crtc);
                }
                DRM_DEBUG("IH: D%d vblank\n", crtc + 1);
                break;
        case 1: /* vline */
                if (disp_int & interrupt_status_offsets[crtc].vline)
                        WREG32(mmVLINE_STATUS + crtc_offsets[crtc], VLINE_ACK);
                else
                        DRM_DEBUG("IH: IH event w/o asserted irq bit?\n");

                DRM_DEBUG("IH: D%d vline\n", crtc + 1);
                break;
        default:
                DRM_DEBUG("Unhandled interrupt: %d %d\n", entry->src_id, entry->src_data);
                break;
        }

        return 0;
}

static int dce_v6_0_set_pageflip_interrupt_state(struct amdgpu_device *adev,
                                                 struct amdgpu_irq_src *src,
                                                 unsigned type,
                                                 enum amdgpu_interrupt_state state)
{
        u32 reg;

        if (type >= adev->mode_info.num_crtc) {
                DRM_ERROR("invalid pageflip crtc %d\n", type);
                return -EINVAL;
        }

        reg = RREG32(mmGRPH_INTERRUPT_CONTROL + crtc_offsets[type]);
        if (state == AMDGPU_IRQ_STATE_DISABLE)
                WREG32(mmGRPH_INTERRUPT_CONTROL + crtc_offsets[type],
                       reg & ~GRPH_INTERRUPT_CONTROL__GRPH_PFLIP_INT_MASK_MASK);
        else
                WREG32(mmGRPH_INTERRUPT_CONTROL + crtc_offsets[type],
                       reg | GRPH_INTERRUPT_CONTROL__GRPH_PFLIP_INT_MASK_MASK);

        return 0;
}

static int dce_v6_0_pageflip_irq(struct amdgpu_device *adev,
                                 struct amdgpu_irq_src *source,
                                 struct amdgpu_iv_entry *entry)
{
                unsigned long flags;
        unsigned crtc_id;
        struct amdgpu_crtc *amdgpu_crtc;
        struct amdgpu_flip_work *works;

        crtc_id = (entry->src_id - 8) >> 1;
        amdgpu_crtc = adev->mode_info.crtcs[crtc_id];

        if (crtc_id >= adev->mode_info.num_crtc) {
                DRM_ERROR("invalid pageflip crtc %d\n", crtc_id);
                return -EINVAL;
        }

        if (RREG32(mmGRPH_INTERRUPT_STATUS + crtc_offsets[crtc_id]) &
            GRPH_INTERRUPT_STATUS__GRPH_PFLIP_INT_OCCURRED_MASK)
                WREG32(mmGRPH_INTERRUPT_STATUS + crtc_offsets[crtc_id],
                       GRPH_INTERRUPT_STATUS__GRPH_PFLIP_INT_CLEAR_MASK);

        /* IRQ could occur when in initial stage */
        if (amdgpu_crtc == NULL)
                return 0;

        spin_lock_irqsave(&adev->ddev->event_lock, flags);
        works = amdgpu_crtc->pflip_works;
        if (amdgpu_crtc->pflip_status != AMDGPU_FLIP_SUBMITTED){
                DRM_DEBUG_DRIVER("amdgpu_crtc->pflip_status = %d != "
                                                "AMDGPU_FLIP_SUBMITTED(%d)\n",
                                                amdgpu_crtc->pflip_status,
                                                AMDGPU_FLIP_SUBMITTED);
                spin_unlock_irqrestore(&adev->ddev->event_lock, flags);
                return 0;
        }

        /* page flip completed. clean up */
        amdgpu_crtc->pflip_status = AMDGPU_FLIP_NONE;
        amdgpu_crtc->pflip_works = NULL;

        /* wakeup usersapce */
        if (works->event)
                drm_crtc_send_vblank_event(&amdgpu_crtc->base, works->event);

        spin_unlock_irqrestore(&adev->ddev->event_lock, flags);

        drm_crtc_vblank_put(&amdgpu_crtc->base);
        schedule_work(&works->unpin_work);

        return 0;
}

static int dce_v6_0_hpd_irq(struct amdgpu_device *adev,
                            struct amdgpu_irq_src *source,
                            struct amdgpu_iv_entry *entry)
{
        uint32_t disp_int, mask, tmp;
        unsigned hpd;

        if (entry->src_data >= adev->mode_info.num_hpd) {
                DRM_DEBUG("Unhandled interrupt: %d %d\n", entry->src_id, entry->src_data);
                return 0;
        }

        hpd = entry->src_data;
        disp_int = RREG32(interrupt_status_offsets[hpd].reg);
        mask = interrupt_status_offsets[hpd].hpd;

        if (disp_int & mask) {
                tmp = RREG32(mmDC_HPD1_INT_CONTROL + hpd_offsets[hpd]);
                tmp |= DC_HPD1_INT_CONTROL__DC_HPD1_INT_ACK_MASK;
                WREG32(mmDC_HPD1_INT_CONTROL + hpd_offsets[hpd], tmp);
                schedule_work(&adev->hotplug_work);
                DRM_INFO("IH: HPD%d\n", hpd + 1);
        }

        return 0;

}

static int dce_v6_0_set_clockgating_state(void *handle,
                                          enum amd_clockgating_state state)
{
        return 0;
}

static int dce_v6_0_set_powergating_state(void *handle,
                                          enum amd_powergating_state state)
{
        return 0;
}

static const struct amd_ip_funcs dce_v6_0_ip_funcs = {
        .name = "dce_v6_0",
        .early_init = dce_v6_0_early_init,
        .late_init = NULL,
        .sw_init = dce_v6_0_sw_init,
        .sw_fini = dce_v6_0_sw_fini,
        .hw_init = dce_v6_0_hw_init,
        .hw_fini = dce_v6_0_hw_fini,
        .suspend = dce_v6_0_suspend,
        .resume = dce_v6_0_resume,
        .is_idle = dce_v6_0_is_idle,
        .wait_for_idle = dce_v6_0_wait_for_idle,
        .soft_reset = dce_v6_0_soft_reset,
        .set_clockgating_state = dce_v6_0_set_clockgating_state,
        .set_powergating_state = dce_v6_0_set_powergating_state,
};

static void
dce_v6_0_encoder_mode_set(struct drm_encoder *encoder,
                          struct drm_display_mode *mode,
                          struct drm_display_mode *adjusted_mode)
{

        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);

        amdgpu_encoder->pixel_clock = adjusted_mode->clock;

        /* need to call this here rather than in prepare() since we need some crtc info */
        amdgpu_atombios_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);

        /* set scaler clears this on some chips */
        dce_v6_0_set_interleave(encoder->crtc, mode);

        if (amdgpu_atombios_encoder_get_encoder_mode(encoder) == ATOM_ENCODER_MODE_HDMI) {
                dce_v6_0_afmt_enable(encoder, true);
                dce_v6_0_afmt_setmode(encoder, adjusted_mode);
        }
}

static void dce_v6_0_encoder_prepare(struct drm_encoder *encoder)
{

        struct amdgpu_device *adev = encoder->dev->dev_private;
        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
        struct drm_connector *connector = amdgpu_get_connector_for_encoder(encoder);

        if ((amdgpu_encoder->active_device &
             (ATOM_DEVICE_DFP_SUPPORT | ATOM_DEVICE_LCD_SUPPORT)) ||
            (amdgpu_encoder_get_dp_bridge_encoder_id(encoder) !=
             ENCODER_OBJECT_ID_NONE)) {
                struct amdgpu_encoder_atom_dig *dig = amdgpu_encoder->enc_priv;
                if (dig) {
                        dig->dig_encoder = dce_v6_0_pick_dig_encoder(encoder);
                        if (amdgpu_encoder->active_device & ATOM_DEVICE_DFP_SUPPORT)
                                dig->afmt = adev->mode_info.afmt[dig->dig_encoder];
                }
        }

        amdgpu_atombios_scratch_regs_lock(adev, true);

        if (connector) {
                struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);

                /* select the clock/data port if it uses a router */
                if (amdgpu_connector->router.cd_valid)
                        amdgpu_i2c_router_select_cd_port(amdgpu_connector);

                /* turn eDP panel on for mode set */
                if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
                        amdgpu_atombios_encoder_set_edp_panel_power(connector,
                                                             ATOM_TRANSMITTER_ACTION_POWER_ON);
        }

        /* this is needed for the pll/ss setup to work correctly in some cases */
        amdgpu_atombios_encoder_set_crtc_source(encoder);
        /* set up the FMT blocks */
        dce_v6_0_program_fmt(encoder);
}

static void dce_v6_0_encoder_commit(struct drm_encoder *encoder)
{

        struct drm_device *dev = encoder->dev;
        struct amdgpu_device *adev = dev->dev_private;

        /* need to call this here as we need the crtc set up */
        amdgpu_atombios_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
        amdgpu_atombios_scratch_regs_lock(adev, false);
}

static void dce_v6_0_encoder_disable(struct drm_encoder *encoder)
{

        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
        struct amdgpu_encoder_atom_dig *dig;

        amdgpu_atombios_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);

        if (amdgpu_atombios_encoder_is_digital(encoder)) {
                if (amdgpu_atombios_encoder_get_encoder_mode(encoder) == ATOM_ENCODER_MODE_HDMI)
                        dce_v6_0_afmt_enable(encoder, false);
                dig = amdgpu_encoder->enc_priv;
                dig->dig_encoder = -1;
        }
        amdgpu_encoder->active_device = 0;
}

/* these are handled by the primary encoders */
static void dce_v6_0_ext_prepare(struct drm_encoder *encoder)
{

}

static void dce_v6_0_ext_commit(struct drm_encoder *encoder)
{

}

static void
dce_v6_0_ext_mode_set(struct drm_encoder *encoder,
                      struct drm_display_mode *mode,
                      struct drm_display_mode *adjusted_mode)
{

}

static void dce_v6_0_ext_disable(struct drm_encoder *encoder)
{

}

static void
dce_v6_0_ext_dpms(struct drm_encoder *encoder, int mode)
{

}

static bool dce_v6_0_ext_mode_fixup(struct drm_encoder *encoder,
                                    const struct drm_display_mode *mode,
                                    struct drm_display_mode *adjusted_mode)
{
        return true;
}

static const struct drm_encoder_helper_funcs dce_v6_0_ext_helper_funcs = {
        .dpms = dce_v6_0_ext_dpms,
        .mode_fixup = dce_v6_0_ext_mode_fixup,
        .prepare = dce_v6_0_ext_prepare,
        .mode_set = dce_v6_0_ext_mode_set,
        .commit = dce_v6_0_ext_commit,
        .disable = dce_v6_0_ext_disable,
        /* no detect for TMDS/LVDS yet */
};

static const struct drm_encoder_helper_funcs dce_v6_0_dig_helper_funcs = {
        .dpms = amdgpu_atombios_encoder_dpms,
        .mode_fixup = amdgpu_atombios_encoder_mode_fixup,
        .prepare = dce_v6_0_encoder_prepare,
        .mode_set = dce_v6_0_encoder_mode_set,
        .commit = dce_v6_0_encoder_commit,
        .disable = dce_v6_0_encoder_disable,
        .detect = amdgpu_atombios_encoder_dig_detect,
};

static const struct drm_encoder_helper_funcs dce_v6_0_dac_helper_funcs = {
        .dpms = amdgpu_atombios_encoder_dpms,
        .mode_fixup = amdgpu_atombios_encoder_mode_fixup,
        .prepare = dce_v6_0_encoder_prepare,
        .mode_set = dce_v6_0_encoder_mode_set,
        .commit = dce_v6_0_encoder_commit,
        .detect = amdgpu_atombios_encoder_dac_detect,
};

static void dce_v6_0_encoder_destroy(struct drm_encoder *encoder)
{
        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
        if (amdgpu_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT))
                amdgpu_atombios_encoder_fini_backlight(amdgpu_encoder);
        kfree(amdgpu_encoder->enc_priv);
        drm_encoder_cleanup(encoder);
        kfree(amdgpu_encoder);
}

static const struct drm_encoder_funcs dce_v6_0_encoder_funcs = {
        .destroy = dce_v6_0_encoder_destroy,
};

static void dce_v6_0_encoder_add(struct amdgpu_device *adev,
                                 uint32_t encoder_enum,
                                 uint32_t supported_device,
                                 u16 caps)
{
        struct drm_device *dev = adev->ddev;
        struct drm_encoder *encoder;
        struct amdgpu_encoder *amdgpu_encoder;

        /* see if we already added it */
        list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
                amdgpu_encoder = to_amdgpu_encoder(encoder);
                if (amdgpu_encoder->encoder_enum == encoder_enum) {
                        amdgpu_encoder->devices |= supported_device;
                        return;
                }

        }

        /* add a new one */
        amdgpu_encoder = kzalloc(sizeof(struct amdgpu_encoder), GFP_KERNEL);
        if (!amdgpu_encoder)
                return;

        encoder = &amdgpu_encoder->base;
        switch (adev->mode_info.num_crtc) {
        case 1:
                encoder->possible_crtcs = 0x1;
                break;
        case 2:
        default:
                encoder->possible_crtcs = 0x3;
                break;
        case 4:
                encoder->possible_crtcs = 0xf;
                break;
        case 6:
                encoder->possible_crtcs = 0x3f;
                break;
        }

        amdgpu_encoder->enc_priv = NULL;
        amdgpu_encoder->encoder_enum = encoder_enum;
        amdgpu_encoder->encoder_id = (encoder_enum & OBJECT_ID_MASK) >> OBJECT_ID_SHIFT;
        amdgpu_encoder->devices = supported_device;
        amdgpu_encoder->rmx_type = RMX_OFF;
        amdgpu_encoder->underscan_type = UNDERSCAN_OFF;
        amdgpu_encoder->is_ext_encoder = false;
        amdgpu_encoder->caps = caps;

        switch (amdgpu_encoder->encoder_id) {
        case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DAC1:
        case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DAC2:
                drm_encoder_init(dev, encoder, &dce_v6_0_encoder_funcs,
                                 DRM_MODE_ENCODER_DAC, NULL);
                drm_encoder_helper_add(encoder, &dce_v6_0_dac_helper_funcs);
                break;
        case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:
        case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
        case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
        case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
        case ENCODER_OBJECT_ID_INTERNAL_UNIPHY3:
                if (amdgpu_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
                        amdgpu_encoder->rmx_type = RMX_FULL;
                        drm_encoder_init(dev, encoder, &dce_v6_0_encoder_funcs,
                                         DRM_MODE_ENCODER_LVDS, NULL);
                        amdgpu_encoder->enc_priv = amdgpu_atombios_encoder_get_lcd_info(amdgpu_encoder);
                } else if (amdgpu_encoder->devices & (ATOM_DEVICE_CRT_SUPPORT)) {
                        drm_encoder_init(dev, encoder, &dce_v6_0_encoder_funcs,
                                         DRM_MODE_ENCODER_DAC, NULL);
                        amdgpu_encoder->enc_priv = amdgpu_atombios_encoder_get_dig_info(amdgpu_encoder);
                } else {
                        drm_encoder_init(dev, encoder, &dce_v6_0_encoder_funcs,
                                         DRM_MODE_ENCODER_TMDS, NULL);
                        amdgpu_encoder->enc_priv = amdgpu_atombios_encoder_get_dig_info(amdgpu_encoder);