// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
 * Author:Mark Yao <mark.yao@rock-chips.com>
 */

#include <drm/drm.h>
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_uapi.h>
#include <drm/drm_crtc.h>
#include <drm/drm_flip_work.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_probe_helper.h>
#ifdef CONFIG_DRM_ANALOGIX_DP
#include <drm/bridge/analogix_dp.h>
#endif

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/iopoll.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/component.h>
#include <linux/overflow.h>

#include <linux/reset.h>
#include <linux/delay.h>

#include "rockchip_drm_drv.h"
#include "rockchip_drm_gem.h"
#include "rockchip_drm_fb.h"
#include "rockchip_drm_psr.h"
#include "rockchip_drm_vop.h"
#include "rockchip_rgb.h"

#define VOP_WIN_SET(vop, win, name, v) \
                vop_reg_set(vop, &win->phy->name, win->base, ~0, v, #name)
#define VOP_SCL_SET(vop, win, name, v) \
                vop_reg_set(vop, &win->phy->scl->name, win->base, ~0, v, #name)
#define VOP_SCL_SET_EXT(vop, win, name, v) \
                vop_reg_set(vop, &win->phy->scl->ext->name, \
                            win->base, ~0, v, #name)

#define VOP_WIN_YUV2YUV_SET(vop, win_yuv2yuv, name, v) \
        do { \
                if (win_yuv2yuv && win_yuv2yuv->name.mask) \
                        vop_reg_set(vop, &win_yuv2yuv->name, 0, ~0, v, #name); \
        } while (0)

#define VOP_WIN_YUV2YUV_COEFFICIENT_SET(vop, win_yuv2yuv, name, v) \
        do { \
                if (win_yuv2yuv && win_yuv2yuv->phy->name.mask) \
                        vop_reg_set(vop, &win_yuv2yuv->phy->name, win_yuv2yuv->base, ~0, v, #name); \
        } while (0)

#define VOP_INTR_SET_MASK(vop, name, mask, v) \
                vop_reg_set(vop, &vop->data->intr->name, 0, mask, v, #name)

#define VOP_REG_SET(vop, group, name, v) \
                    vop_reg_set(vop, &vop->data->group->name, 0, ~0, v, #name)

#define VOP_INTR_SET_TYPE(vop, name, type, v) \
        do { \
                int i, reg = 0, mask = 0; \
                for (i = 0; i < vop->data->intr->nintrs; i++) { \
                        if (vop->data->intr->intrs[i] & type) { \
                                reg |= (v) << i; \
                                mask |= 1 << i; \
                        } \
                } \
                VOP_INTR_SET_MASK(vop, name, mask, reg); \
        } while (0)
#define VOP_INTR_GET_TYPE(vop, name, type) \
                vop_get_intr_type(vop, &vop->data->intr->name, type)

#define VOP_WIN_GET(vop, win, name) \
                vop_read_reg(vop, win->offset, win->phy->name)

#define VOP_WIN_HAS_REG(win, name) \
        (!!(win->phy->name.mask))

#define VOP_WIN_GET_YRGBADDR(vop, win) \
                vop_readl(vop, win->base + win->phy->yrgb_mst.offset)

#define VOP_WIN_TO_INDEX(vop_win) \
        ((vop_win) - (vop_win)->vop->win)

#define to_vop(x) container_of(x, struct vop, crtc)
#define to_vop_win(x) container_of(x, struct vop_win, base)

/*
 * The coefficients of the following matrix are all fixed points.
 * The format is S2.10 for the 3x3 part of the matrix, and S9.12 for the offsets.
 * They are all represented in two's complement.
 */
static const uint32_t bt601_yuv2rgb[] = {
        0x4A8, 0x0,    0x662,
        0x4A8, 0x1E6F, 0x1CBF,
        0x4A8, 0x812,  0x0,
        0x321168, 0x0877CF, 0x2EB127
};

enum vop_pending {
        VOP_PENDING_FB_UNREF,
};

struct vop_win {
        struct drm_plane base;
        const struct vop_win_data *data;
        const struct vop_win_yuv2yuv_data *yuv2yuv_data;
        struct vop *vop;
};

struct rockchip_rgb;
struct vop {
        struct drm_crtc crtc;
        struct device *dev;
        struct drm_device *drm_dev;
        bool is_enabled;

        struct completion dsp_hold_completion;

        /* protected by dev->event_lock */
        struct drm_pending_vblank_event *event;

        struct drm_flip_work fb_unref_work;
        unsigned long pending;

        struct completion line_flag_completion;

        const struct vop_data *data;

        uint32_t *regsbak;
        void __iomem *regs;

        /* physical map length of vop register */
        uint32_t len;

        /* one time only one process allowed to config the register */
        spinlock_t reg_lock;
        /* lock vop irq reg */
        spinlock_t irq_lock;
        /* protects crtc enable/disable */
        struct mutex vop_lock;

        unsigned int irq;

        /* vop AHP clk */
        struct clk *hclk;
        /* vop dclk */
        struct clk *dclk;
        /* vop share memory frequency */
        struct clk *aclk;

        /* vop dclk reset */
        struct reset_control *dclk_rst;

        /* optional internal rgb encoder */
        struct rockchip_rgb *rgb;

        struct vop_win win[];
};

static inline void vop_writel(struct vop *vop, uint32_t offset, uint32_t v)
{
        writel(v, vop->regs + offset);
        vop->regsbak[offset >> 2] = v;
}

static inline uint32_t vop_readl(struct vop *vop, uint32_t offset)
{
        return readl(vop->regs + offset);
}

static inline uint32_t vop_read_reg(struct vop *vop, uint32_t base,
                                    const struct vop_reg *reg)
{
        return (vop_readl(vop, base + reg->offset) >> reg->shift) & reg->mask;
}

static void vop_reg_set(struct vop *vop, const struct vop_reg *reg,
                        uint32_t _offset, uint32_t _mask, uint32_t v,
                        const char *reg_name)
{
        int offset, mask, shift;

        if (!reg || !reg->mask) {
                DRM_DEV_DEBUG(vop->dev, "Warning: not support %s\n", reg_name);
                return;
        }

        offset = reg->offset + _offset;
        mask = reg->mask & _mask;
        shift = reg->shift;

        if (reg->write_mask) {
                v = ((v << shift) & 0xffff) | (mask << (shift + 16));
        } else {
                uint32_t cached_val = vop->regsbak[offset >> 2];

                v = (cached_val & ~(mask << shift)) | ((v & mask) << shift);
                vop->regsbak[offset >> 2] = v;
        }

        if (reg->relaxed)
                writel_relaxed(v, vop->regs + offset);
        else
                writel(v, vop->regs + offset);
}

static inline uint32_t vop_get_intr_type(struct vop *vop,
                                         const struct vop_reg *reg, int type)
{
        uint32_t i, ret = 0;
        uint32_t regs = vop_read_reg(vop, 0, reg);

        for (i = 0; i < vop->data->intr->nintrs; i++) {
                if ((type & vop->data->intr->intrs[i]) && (regs & 1 << i))
                        ret |= vop->data->intr->intrs[i];
        }

        return ret;
}

static inline void vop_cfg_done(struct vop *vop)
{
        VOP_REG_SET(vop, common, cfg_done, 1);
}

static bool has_rb_swapped(uint32_t format)
{
        switch (format) {
        case DRM_FORMAT_XBGR8888:
        case DRM_FORMAT_ABGR8888:
        case DRM_FORMAT_BGR888:
        case DRM_FORMAT_BGR565:
                return true;
        default:
                return false;
        }
}

static enum vop_data_format vop_convert_format(uint32_t format)
{
        switch (format) {
        case DRM_FORMAT_XRGB8888:
        case DRM_FORMAT_ARGB8888:
        case DRM_FORMAT_XBGR8888:
        case DRM_FORMAT_ABGR8888:
                return VOP_FMT_ARGB8888;
        case DRM_FORMAT_RGB888:
        case DRM_FORMAT_BGR888:
                return VOP_FMT_RGB888;
        case DRM_FORMAT_RGB565:
        case DRM_FORMAT_BGR565:
                return VOP_FMT_RGB565;
        case DRM_FORMAT_NV12:
                return VOP_FMT_YUV420SP;
        case DRM_FORMAT_NV16:
                return VOP_FMT_YUV422SP;
        case DRM_FORMAT_NV24:
                return VOP_FMT_YUV444SP;
        default:
                DRM_ERROR("unsupported format[%08x]\n", format);
                return -EINVAL;
        }
}

static uint16_t scl_vop_cal_scale(enum scale_mode mode, uint32_t src,
                                  uint32_t dst, bool is_horizontal,
                                  int vsu_mode, int *vskiplines)
{
        uint16_t val = 1 << SCL_FT_DEFAULT_FIXPOINT_SHIFT;

        if (vskiplines)
                *vskiplines = 0;

        if (is_horizontal) {
                if (mode == SCALE_UP)
                        val = GET_SCL_FT_BIC(src, dst);
                else if (mode == SCALE_DOWN)
                        val = GET_SCL_FT_BILI_DN(src, dst);
        } else {
                if (mode == SCALE_UP) {
                        if (vsu_mode == SCALE_UP_BIL)
                                val = GET_SCL_FT_BILI_UP(src, dst);
                        else
                                val = GET_SCL_FT_BIC(src, dst);
                } else if (mode == SCALE_DOWN) {
                        if (vskiplines) {
                                *vskiplines = scl_get_vskiplines(src, dst);
                                val = scl_get_bili_dn_vskip(src, dst,
                                                            *vskiplines);
                        } else {
                                val = GET_SCL_FT_BILI_DN(src, dst);
                        }
                }
        }

        return val;
}

static void scl_vop_cal_scl_fac(struct vop *vop, const struct vop_win_data *win,
                             uint32_t src_w, uint32_t src_h, uint32_t dst_w,
                             uint32_t dst_h, const struct drm_format_info *info)
{
        uint16_t yrgb_hor_scl_mode, yrgb_ver_scl_mode;
        uint16_t cbcr_hor_scl_mode = SCALE_NONE;
        uint16_t cbcr_ver_scl_mode = SCALE_NONE;
        bool is_yuv = false;
        uint16_t cbcr_src_w = src_w / info->hsub;
        uint16_t cbcr_src_h = src_h / info->vsub;
        uint16_t vsu_mode;
        uint16_t lb_mode;
        uint32_t val;
        int vskiplines;

        if (info->is_yuv)
                is_yuv = true;

        if (dst_w > 3840) {
                DRM_DEV_ERROR(vop->dev, "Maximum dst width (3840) exceeded\n");
                return;
        }

        if (!win->phy->scl->ext) {
                VOP_SCL_SET(vop, win, scale_yrgb_x,
                            scl_cal_scale2(src_w, dst_w));
                VOP_SCL_SET(vop, win, scale_yrgb_y,
                            scl_cal_scale2(src_h, dst_h));
                if (is_yuv) {
                        VOP_SCL_SET(vop, win, scale_cbcr_x,
                                    scl_cal_scale2(cbcr_src_w, dst_w));
                        VOP_SCL_SET(vop, win, scale_cbcr_y,
                                    scl_cal_scale2(cbcr_src_h, dst_h));
                }
                return;
        }

        yrgb_hor_scl_mode = scl_get_scl_mode(src_w, dst_w);
        yrgb_ver_scl_mode = scl_get_scl_mode(src_h, dst_h);

        if (is_yuv) {
                cbcr_hor_scl_mode = scl_get_scl_mode(cbcr_src_w, dst_w);
                cbcr_ver_scl_mode = scl_get_scl_mode(cbcr_src_h, dst_h);
                if (cbcr_hor_scl_mode == SCALE_DOWN)
                        lb_mode = scl_vop_cal_lb_mode(dst_w, true);
                else
                        lb_mode = scl_vop_cal_lb_mode(cbcr_src_w, true);
        } else {
                if (yrgb_hor_scl_mode == SCALE_DOWN)
                        lb_mode = scl_vop_cal_lb_mode(dst_w, false);
                else
                        lb_mode = scl_vop_cal_lb_mode(src_w, false);
        }

        VOP_SCL_SET_EXT(vop, win, lb_mode, lb_mode);
        if (lb_mode == LB_RGB_3840X2) {
                if (yrgb_ver_scl_mode != SCALE_NONE) {
                        DRM_DEV_ERROR(vop->dev, "not allow yrgb ver scale\n");
                        return;
                }
                if (cbcr_ver_scl_mode != SCALE_NONE) {
                        DRM_DEV_ERROR(vop->dev, "not allow cbcr ver scale\n");
                        return;
                }
                vsu_mode = SCALE_UP_BIL;
        } else if (lb_mode == LB_RGB_2560X4) {
                vsu_mode = SCALE_UP_BIL;
        } else {
                vsu_mode = SCALE_UP_BIC;
        }

        val = scl_vop_cal_scale(yrgb_hor_scl_mode, src_w, dst_w,
                                true, 0, NULL);
        VOP_SCL_SET(vop, win, scale_yrgb_x, val);
        val = scl_vop_cal_scale(yrgb_ver_scl_mode, src_h, dst_h,
                                false, vsu_mode, &vskiplines);
        VOP_SCL_SET(vop, win, scale_yrgb_y, val);

        VOP_SCL_SET_EXT(vop, win, vsd_yrgb_gt4, vskiplines == 4);
        VOP_SCL_SET_EXT(vop, win, vsd_yrgb_gt2, vskiplines == 2);

        VOP_SCL_SET_EXT(vop, win, yrgb_hor_scl_mode, yrgb_hor_scl_mode);
        VOP_SCL_SET_EXT(vop, win, yrgb_ver_scl_mode, yrgb_ver_scl_mode);
        VOP_SCL_SET_EXT(vop, win, yrgb_hsd_mode, SCALE_DOWN_BIL);
        VOP_SCL_SET_EXT(vop, win, yrgb_vsd_mode, SCALE_DOWN_BIL);
        VOP_SCL_SET_EXT(vop, win, yrgb_vsu_mode, vsu_mode);
        if (is_yuv) {
                val = scl_vop_cal_scale(cbcr_hor_scl_mode, cbcr_src_w,
                                        dst_w, true, 0, NULL);
                VOP_SCL_SET(vop, win, scale_cbcr_x, val);
                val = scl_vop_cal_scale(cbcr_ver_scl_mode, cbcr_src_h,
                                        dst_h, false, vsu_mode, &vskiplines);
                VOP_SCL_SET(vop, win, scale_cbcr_y, val);

                VOP_SCL_SET_EXT(vop, win, vsd_cbcr_gt4, vskiplines == 4);
                VOP_SCL_SET_EXT(vop, win, vsd_cbcr_gt2, vskiplines == 2);
                VOP_SCL_SET_EXT(vop, win, cbcr_hor_scl_mode, cbcr_hor_scl_mode);
                VOP_SCL_SET_EXT(vop, win, cbcr_ver_scl_mode, cbcr_ver_scl_mode);
                VOP_SCL_SET_EXT(vop, win, cbcr_hsd_mode, SCALE_DOWN_BIL);
                VOP_SCL_SET_EXT(vop, win, cbcr_vsd_mode, SCALE_DOWN_BIL);
                VOP_SCL_SET_EXT(vop, win, cbcr_vsu_mode, vsu_mode);
        }
}

static void vop_dsp_hold_valid_irq_enable(struct vop *vop)
{
        unsigned long flags;

        if (WARN_ON(!vop->is_enabled))
                return;

        spin_lock_irqsave(&vop->irq_lock, flags);

        VOP_INTR_SET_TYPE(vop, clear, DSP_HOLD_VALID_INTR, 1);
        VOP_INTR_SET_TYPE(vop, enable, DSP_HOLD_VALID_INTR, 1);

        spin_unlock_irqrestore(&vop->irq_lock, flags);
}

static void vop_dsp_hold_valid_irq_disable(struct vop *vop)
{
        unsigned long flags;

        if (WARN_ON(!vop->is_enabled))
                return;

        spin_lock_irqsave(&vop->irq_lock, flags);

        VOP_INTR_SET_TYPE(vop, enable, DSP_HOLD_VALID_INTR, 0);

        spin_unlock_irqrestore(&vop->irq_lock, flags);
}

/*
 * (1) each frame starts at the start of the Vsync pulse which is signaled by
 *     the "FRAME_SYNC" interrupt.
 * (2) the active data region of each frame ends at dsp_vact_end
 * (3) we should program this same number (dsp_vact_end) into dsp_line_frag_num,
 *      to get "LINE_FLAG" interrupt at the end of the active on screen data.
 *
 * VOP_INTR_CTRL0.dsp_line_frag_num = VOP_DSP_VACT_ST_END.dsp_vact_end
 * Interrupts
 * LINE_FLAG -------------------------------+
 * FRAME_SYNC ----+                         |
 *                |                         |
 *                v                         v
 *                | Vsync | Vbp |  Vactive  | Vfp |
 *                        ^     ^           ^     ^
 *                        |     |           |     |
 *                        |     |           |     |
 * dsp_vs_end ------------+     |           |     |   VOP_DSP_VTOTAL_VS_END
 * dsp_vact_start --------------+           |     |   VOP_DSP_VACT_ST_END
 * dsp_vact_end ----------------------------+     |   VOP_DSP_VACT_ST_END
 * dsp_total -------------------------------------+   VOP_DSP_VTOTAL_VS_END
 */
static bool vop_line_flag_irq_is_enabled(struct vop *vop)
{
        uint32_t line_flag_irq;
        unsigned long flags;

        spin_lock_irqsave(&vop->irq_lock, flags);

        line_flag_irq = VOP_INTR_GET_TYPE(vop, enable, LINE_FLAG_INTR);

        spin_unlock_irqrestore(&vop->irq_lock, flags);

        return !!line_flag_irq;
}

static void vop_line_flag_irq_enable(struct vop *vop)
{
        unsigned long flags;

        if (WARN_ON(!vop->is_enabled))
                return;

        spin_lock_irqsave(&vop->irq_lock, flags);

        VOP_INTR_SET_TYPE(vop, clear, LINE_FLAG_INTR, 1);
        VOP_INTR_SET_TYPE(vop, enable, LINE_FLAG_INTR, 1);

        spin_unlock_irqrestore(&vop->irq_lock, flags);
}

static void vop_line_flag_irq_disable(struct vop *vop)
{
        unsigned long flags;

        if (WARN_ON(!vop->is_enabled))
                return;

        spin_lock_irqsave(&vop->irq_lock, flags);

        VOP_INTR_SET_TYPE(vop, enable, LINE_FLAG_INTR, 0);

        spin_unlock_irqrestore(&vop->irq_lock, flags);
}

static int vop_core_clks_enable(struct vop *vop)
{
        int ret;

        ret = clk_enable(vop->hclk);
        if (ret < 0)
                return ret;

        ret = clk_enable(vop->aclk);
        if (ret < 0)
                goto err_disable_hclk;

        return 0;

err_disable_hclk:
        clk_disable(vop->hclk);
        return ret;
}

static void vop_core_clks_disable(struct vop *vop)
{
        clk_disable(vop->aclk);
        clk_disable(vop->hclk);
}

static void vop_win_disable(struct vop *vop, const struct vop_win_data *win)
{
        if (win->phy->scl && win->phy->scl->ext) {
                VOP_SCL_SET_EXT(vop, win, yrgb_hor_scl_mode, SCALE_NONE);
                VOP_SCL_SET_EXT(vop, win, yrgb_ver_scl_mode, SCALE_NONE);
                VOP_SCL_SET_EXT(vop, win, cbcr_hor_scl_mode, SCALE_NONE);
                VOP_SCL_SET_EXT(vop, win, cbcr_ver_scl_mode, SCALE_NONE);
        }

        VOP_WIN_SET(vop, win, enable, 0);
}

static int vop_enable(struct drm_crtc *crtc)
{
        struct vop *vop = to_vop(crtc);
        int ret, i;

        ret = pm_runtime_get_sync(vop->dev);
        if (ret < 0) {
                DRM_DEV_ERROR(vop->dev, "failed to get pm runtime: %d\n", ret);
                return ret;
        }

        ret = vop_core_clks_enable(vop);
        if (WARN_ON(ret < 0))
                goto err_put_pm_runtime;

        ret = clk_enable(vop->dclk);
        if (WARN_ON(ret < 0))
                goto err_disable_core;

        /*
         * Slave iommu shares power, irq and clock with vop.  It was associated
         * automatically with this master device via common driver code.
         * Now that we have enabled the clock we attach it to the shared drm
         * mapping.
         */
        ret = rockchip_drm_dma_attach_device(vop->drm_dev, vop->dev);
        if (ret) {
                DRM_DEV_ERROR(vop->dev,
                              "failed to attach dma mapping, %d\n", ret);
                goto err_disable_dclk;
        }

        spin_lock(&vop->reg_lock);
        for (i = 0; i < vop->len; i += 4)
                writel_relaxed(vop->regsbak[i / 4], vop->regs + i);

        /*
         * We need to make sure that all windows are disabled before we
         * enable the crtc. Otherwise we might try to scan from a destroyed
         * buffer later.
         */
        for (i = 0; i < vop->data->win_size; i++) {
                struct vop_win *vop_win = &vop->win[i];
                const struct vop_win_data *win = vop_win->data;

                vop_win_disable(vop, win);
        }
        spin_unlock(&vop->reg_lock);

        vop_cfg_done(vop);

        /*
         * At here, vop clock & iommu is enable, R/W vop regs would be safe.
         */
        vop->is_enabled = true;

        spin_lock(&vop->reg_lock);

        VOP_REG_SET(vop, common, standby, 1);

        spin_unlock(&vop->reg_lock);

        drm_crtc_vblank_on(crtc);

        return 0;

err_disable_dclk:
        clk_disable(vop->dclk);
err_disable_core:
        vop_core_clks_disable(vop);
err_put_pm_runtime:
        pm_runtime_put_sync(vop->dev);
        return ret;
}

static void vop_crtc_atomic_disable(struct drm_crtc *crtc,
                                    struct drm_crtc_state *old_state)
{
        struct vop *vop = to_vop(crtc);

        WARN_ON(vop->event);

        mutex_lock(&vop->vop_lock);
        drm_crtc_vblank_off(crtc);

        /*
         * Vop standby will take effect at end of current frame,
         * if dsp hold valid irq happen, it means standby complete.
         *
         * we must wait standby complete when we want to disable aclk,
         * if not, memory bus maybe dead.
         */
        reinit_completion(&vop->dsp_hold_completion);
        vop_dsp_hold_valid_irq_enable(vop);

        spin_lock(&vop->reg_lock);

        VOP_REG_SET(vop, common, standby, 1);

        spin_unlock(&vop->reg_lock);

        wait_for_completion(&vop->dsp_hold_completion);

        vop_dsp_hold_valid_irq_disable(vop);

        vop->is_enabled = false;

        /*
         * vop standby complete, so iommu detach is safe.
         */
        rockchip_drm_dma_detach_device(vop->drm_dev, vop->dev);

        clk_disable(vop->dclk);
        vop_core_clks_disable(vop);
        pm_runtime_put(vop->dev);
        mutex_unlock(&vop->vop_lock);

        if (crtc->state->event && !crtc->state->active) {
                spin_lock_irq(&crtc->dev->event_lock);
                drm_crtc_send_vblank_event(crtc, crtc->state->event);
                spin_unlock_irq(&crtc->dev->event_lock);

                crtc->state->event = NULL;
        }
}

static void vop_plane_destroy(struct drm_plane *plane)
{
        drm_plane_cleanup(plane);
}

static int vop_plane_atomic_check(struct drm_plane *plane,
                           struct drm_plane_state *state)
{
        struct drm_crtc *crtc = state->crtc;
        struct drm_crtc_state *crtc_state;
        struct drm_framebuffer *fb = state->fb;
        struct vop_win *vop_win = to_vop_win(plane);
        const struct vop_win_data *win = vop_win->data;
        int ret;
        int min_scale = win->phy->scl ? FRAC_16_16(1, 8) :
                                        DRM_PLANE_HELPER_NO_SCALING;
        int max_scale = win->phy->scl ? FRAC_16_16(8, 1) :
                                        DRM_PLANE_HELPER_NO_SCALING;

        if (!crtc || !fb)
                return 0;

        crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
        if (WARN_ON(!crtc_state))
                return -EINVAL;

        ret = drm_atomic_helper_check_plane_state(state, crtc_state,
                                                  min_scale, max_scale,
                                                  true, true);
        if (ret)
                return ret;

        if (!state->visible)
                return 0;

        ret = vop_convert_format(fb->format->format);
        if (ret < 0)
                return ret;

        /*
         * Src.x1 can be odd when do clip, but yuv plane start point
         * need align with 2 pixel.
         */
        if (fb->format->is_yuv && ((state->src.x1 >> 16) % 2)) {
                DRM_ERROR("Invalid Source: Yuv format not support odd xpos\n");
                return -EINVAL;
        }

        if (fb->format->is_yuv && state->rotation & DRM_MODE_REFLECT_Y) {
                DRM_ERROR("Invalid Source: Yuv format does not support this rotation\n");
                return -EINVAL;
        }

        return 0;
}

static void vop_plane_atomic_disable(struct drm_plane *plane,
                                     struct drm_plane_state *old_state)
{
        struct vop_win *vop_win = to_vop_win(plane);
        const struct vop_win_data *win = vop_win->data;
        struct vop *vop = to_vop(old_state->crtc);

        if (!old_state->crtc)
                return;

        spin_lock(&vop->reg_lock);

        vop_win_disable(vop, win);

        spin_unlock(&vop->reg_lock);
}

static void vop_plane_atomic_update(struct drm_plane *plane,
                struct drm_plane_state *old_state)
{
        struct drm_plane_state *state = plane->state;
        struct drm_crtc *crtc = state->crtc;
        struct vop_win *vop_win = to_vop_win(plane);
        const struct vop_win_data *win = vop_win->data;
        const struct vop_win_yuv2yuv_data *win_yuv2yuv = vop_win->yuv2yuv_data;
        struct vop *vop = to_vop(state->crtc);
        struct drm_framebuffer *fb = state->fb;
        unsigned int actual_w, actual_h;
        unsigned int dsp_stx, dsp_sty;
        uint32_t act_info, dsp_info, dsp_st;
        struct drm_rect *src = &state->src;
        struct drm_rect *dest = &state->dst;
        struct drm_gem_object *obj, *uv_obj;
        struct rockchip_gem_object *rk_obj, *rk_uv_obj;
        unsigned long offset;
        dma_addr_t dma_addr;
        uint32_t val;
        bool rb_swap;
        int win_index = VOP_WIN_TO_INDEX(vop_win);
        int format;
        int is_yuv = fb->format->is_yuv;
        int i;

        /*
         * can't update plane when vop is disabled.
         */
        if (WARN_ON(!crtc))
                return;

        if (WARN_ON(!vop->is_enabled))
                return;

        if (!state->visible) {
                vop_plane_atomic_disable(plane, old_state);
                return;
        }

        obj = fb->obj[0];
        rk_obj = to_rockchip_obj(obj);

        actual_w = drm_rect_width(src) >> 16;
        actual_h = drm_rect_height(src) >> 16;
        act_info = (actual_h - 1) << 16 | ((actual_w - 1) & 0xffff);

        dsp_info = (drm_rect_height(dest) - 1) << 16;
        dsp_info |= (drm_rect_width(dest) - 1) & 0xffff;

        dsp_stx = dest->x1 + crtc->mode.htotal - crtc->mode.hsync_start;
        dsp_sty = dest->y1 + crtc->mode.vtotal - crtc->mode.vsync_start;
        dsp_st = dsp_sty << 16 | (dsp_stx & 0xffff);

        offset = (src->x1 >> 16) * fb->format->cpp[0];
        offset += (src->y1 >> 16) * fb->pitches[0];
        dma_addr = rk_obj->dma_addr + offset + fb->offsets[0];

        /*
         * For y-mirroring we need to move address
         * to the beginning of the last line.
         */
        if (state->rotation & DRM_MODE_REFLECT_Y)
                dma_addr += (actual_h - 1) * fb->pitches[0];

        format = vop_convert_format(fb->format->format);

        spin_lock(&vop->reg_lock);

        VOP_WIN_SET(vop, win, format, format);
        VOP_WIN_SET(vop, win, yrgb_vir, DIV_ROUND_UP(fb->pitches[0], 4));
        VOP_WIN_SET(vop, win, yrgb_mst, dma_addr);
        VOP_WIN_YUV2YUV_SET(vop, win_yuv2yuv, y2r_en, is_yuv);
        VOP_WIN_SET(vop, win, y_mir_en,
                    (state->rotation & DRM_MODE_REFLECT_Y) ? 1 : 0);
        VOP_WIN_SET(vop, win, x_mir_en,
                    (state->rotation & DRM_MODE_REFLECT_X) ? 1 : 0);

        if (is_yuv) {
                int hsub = fb->format->hsub;
                int vsub = fb->format->vsub;
                int bpp = fb->format->cpp[1];

                uv_obj = fb->obj[1];
                rk_uv_obj = to_rockchip_obj(uv_obj);

                offset = (src->x1 >> 16) * bpp / hsub;
                offset += (src->y1 >> 16) * fb->pitches[1] / vsub;

                dma_addr = rk_uv_obj->dma_addr + offset + fb->offsets[1];
                VOP_WIN_SET(vop, win, uv_vir, DIV_ROUND_UP(fb->pitches[1], 4));
                VOP_WIN_SET(vop, win, uv_mst, dma_addr);

                for (i = 0; i < NUM_YUV2YUV_COEFFICIENTS; i++) {
                        VOP_WIN_YUV2YUV_COEFFICIENT_SET(vop,
                                                        win_yuv2yuv,
                                                        y2r_coefficients[i],
                                                        bt601_yuv2rgb[i]);
                }
        }

        if (win->phy->scl)
                scl_vop_cal_scl_fac(vop, win, actual_w, actual_h,
                                    drm_rect_width(dest), drm_rect_height(dest),
                                    fb->format);

        VOP_WIN_SET(vop, win, act_info, act_info);
        VOP_WIN_SET(vop, win, dsp_info, dsp_info);
        VOP_WIN_SET(vop, win, dsp_st, dsp_st);

        rb_swap = has_rb_swapped(fb->format->format);
        VOP_WIN_SET(vop, win, rb_swap, rb_swap);

        /*
         * Blending win0 with the background color doesn't seem to work
         * correctly. We only get the background color, no matter the contents
         * of the win0 framebuffer.  However, blending pre-multiplied color
         * with the default opaque black default background color is a no-op,
         * so we can just disable blending to get the correct result.
         */
        if (fb->format->has_alpha && win_index > 0) {
                VOP_WIN_SET(vop, win, dst_alpha_ctl,
                            DST_FACTOR_M0(ALPHA_SRC_INVERSE));
                val = SRC_ALPHA_EN(1) | SRC_COLOR_M0(ALPHA_SRC_PRE_MUL) |
                        SRC_ALPHA_M0(ALPHA_STRAIGHT) |
                        SRC_BLEND_M0(ALPHA_PER_PIX) |
                        SRC_ALPHA_CAL_M0(ALPHA_NO_SATURATION) |
                        SRC_FACTOR_M0(ALPHA_ONE);
                VOP_WIN_SET(vop, win, src_alpha_ctl, val);
        } else {
                VOP_WIN_SET(vop, win, src_alpha_ctl, SRC_ALPHA_EN(0));
        }

        VOP_WIN_SET(vop, win, enable, 1);
        spin_unlock(&vop->reg_lock);
}

static int vop_plane_atomic_async_check(struct drm_plane *plane,
                                        struct drm_plane_state *state)
{
        struct vop_win *vop_win = to_vop_win(plane);
        const struct vop_win_data *win = vop_win->data;
        int min_scale = win->phy->scl ? FRAC_16_16(1, 8) :
                                        DRM_PLANE_HELPER_NO_SCALING;
        int max_scale = win->phy->scl ? FRAC_16_16(8, 1) :
                                        DRM_PLANE_HELPER_NO_SCALING;
        struct drm_crtc_state *crtc_state;

        if (plane != state->crtc->cursor)
                return -EINVAL;

        if (!plane->state)
                return -EINVAL;

        if (!plane->state->fb)
                return -EINVAL;

        if (state->state)
                crtc_state = drm_atomic_get_existing_crtc_state(state->state,
                                                                state->crtc);
        else /* Special case for asynchronous cursor updates. */
                crtc_state = plane->crtc->state;

        return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
                                                   min_scale, max_scale,
                                                   true, true);
}

static void vop_plane_atomic_async_update(struct drm_plane *plane,
                                          struct drm_plane_state *new_state)
{
        struct vop *vop = to_vop(plane->state->crtc);
        struct drm_framebuffer *old_fb = plane->state->fb;

        plane->state->crtc_x = new_state->crtc_x;
        plane->state->crtc_y = new_state->crtc_y;
        plane->state->crtc_h = new_state->crtc_h;
        plane->state->crtc_w = new_state->crtc_w;
        plane->state->src_x = new_state->src_x;
        plane->state->src_y = new_state->src_y;
        plane->state->src_h = new_state->src_h;
        plane->state->src_w = new_state->src_w;
        swap(plane->state->fb, new_state->fb);

        if (vop->is_enabled) {
                rockchip_drm_psr_inhibit_get_state(new_state->state);
                vop_plane_atomic_update(plane, plane->state);
                spin_lock(&vop->reg_lock);
                vop_cfg_done(vop);
                spin_unlock(&vop->reg_lock);
                rockchip_drm_psr_inhibit_put_state(new_state->state);

                /*
                 * A scanout can still be occurring, so we can't drop the
                 * reference to the old framebuffer. To solve this we get a
                 * reference to old_fb and set a worker to release it later.
                 * FIXME: if we perform 500 async_update calls before the
                 * vblank, then we can have 500 different framebuffers waiting
                 * to be released.
                 */
                if (old_fb && plane->state->fb != old_fb) {
                        drm_framebuffer_get(old_fb);
                        WARN_ON(drm_crtc_vblank_get(plane->state->crtc) != 0);
                        drm_flip_work_queue(&vop->fb_unref_work, old_fb);
                        set_bit(VOP_PENDING_FB_UNREF, &vop->pending);
                }
        }
}

static const struct drm_plane_helper_funcs plane_helper_funcs = {
        .atomic_check = vop_plane_atomic_check,
        .atomic_update = vop_plane_atomic_update,
        .atomic_disable = vop_plane_atomic_disable,
        .atomic_async_check = vop_plane_atomic_async_check,
        .atomic_async_update = vop_plane_atomic_async_update,
        .prepare_fb = drm_gem_fb_prepare_fb,
};

static const struct drm_plane_funcs vop_plane_funcs = {
        .update_plane   = drm_atomic_helper_update_plane,
        .disable_plane  = drm_atomic_helper_disable_plane,
        .destroy = vop_plane_destroy,
        .reset = drm_atomic_helper_plane_reset,
        .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
        .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
};

static int vop_crtc_enable_vblank(struct drm_crtc *crtc)
{
        struct vop *vop = to_vop(crtc);
        unsigned long flags;

        if (WARN_ON(!vop->is_enabled))
                return -EPERM;

        spin_lock_irqsave(&vop->irq_lock, flags);

        VOP_INTR_SET_TYPE(vop, clear, FS_INTR, 1);
        VOP_INTR_SET_TYPE(vop, enable, FS_INTR, 1);

        spin_unlock_irqrestore(&vop->irq_lock, flags);

        return 0;
}

static void vop_crtc_disable_vblank(struct drm_crtc *crtc)
{
        struct vop *vop = to_vop(crtc);
        unsigned long flags;

        if (WARN_ON(!vop->is_enabled))
                return;

        spin_lock_irqsave(&vop->irq_lock, flags);

        VOP_INTR_SET_TYPE(vop, enable, FS_INTR, 0);

        spin_unlock_irqrestore(&vop->irq_lock, flags);
}

static bool vop_crtc_mode_fixup(struct drm_crtc *crtc,
                                const struct drm_display_mode *mode,
                                struct drm_display_mode *adjusted_mode)
{
        struct vop *vop = to_vop(crtc);

        adjusted_mode->clock =
                DIV_ROUND_UP(clk_round_rate(vop->dclk,
                                            adjusted_mode->clock * 1000), 1000);

        return true;
}

static void vop_crtc_atomic_enable(struct drm_crtc *crtc,
                                   struct drm_crtc_state *old_state)
{
        struct vop *vop = to_vop(crtc);
        const struct vop_data *vop_data = vop->data;
        struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc->state);
        struct drm_display_mode *adjusted_mode = &crtc->state->adjusted_mode;
        u16 hsync_len = adjusted_mode->hsync_end - adjusted_mode->hsync_start;
        u16 hdisplay = adjusted_mode->hdisplay;
        u16 htotal = adjusted_mode->htotal;
        u16 hact_st = adjusted_mode->htotal - adjusted_mode->hsync_start;
        u16 hact_end = hact_st + hdisplay;
        u16 vdisplay = adjusted_mode->vdisplay;
        u16 vtotal = adjusted_mode->vtotal;
        u16 vsync_len = adjusted_mode->vsync_end - adjusted_mode->vsync_start;
        u16 vact_st = adjusted_mode->vtotal - adjusted_mode->vsync_start;
        u16 vact_end = vact_st + vdisplay;
        uint32_t pin_pol, val;
        int dither_bpc = s->output_bpc ? s->output_bpc : 10;
        int ret;

        mutex_lock(&vop->vop_lock);

        WARN_ON(vop->event);

        ret = vop_enable(crtc);
        if (ret) {
                mutex_unlock(&vop->vop_lock);
                DRM_DEV_ERROR(vop->dev, "Failed to enable vop (%d)\n", ret);
                return;
        }

        pin_pol = BIT(DCLK_INVERT);
        pin_pol |= (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) ?
                   BIT(HSYNC_POSITIVE) : 0;
        pin_pol |= (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) ?
                   BIT(VSYNC_POSITIVE) : 0;
        VOP_REG_SET(vop, output, pin_pol, pin_pol);
        VOP_REG_SET(vop, output, mipi_dual_channel_en, 0);

        switch (s->output_type) {
        case DRM_MODE_CONNECTOR_LVDS:
                VOP_REG_SET(vop, output, rgb_en, 1);
                VOP_REG_SET(vop, output, rgb_pin_pol, pin_pol);
                break;
        case DRM_MODE_CONNECTOR_eDP:
                VOP_REG_SET(vop, output, edp_pin_pol, pin_pol);
                VOP_REG_SET(vop, output, edp_en, 1);
                break;
        case DRM_MODE_CONNECTOR_HDMIA:
                VOP_REG_SET(vop, output, hdmi_pin_pol, pin_pol);
                VOP_REG_SET(vop, output, hdmi_en, 1);
                break;
        case DRM_MODE_CONNECTOR_DSI:
                VOP_REG_SET(vop, output, mipi_pin_pol, pin_pol);
                VOP_REG_SET(vop, output, mipi_en, 1);
                VOP_REG_SET(vop, output, mipi_dual_channel_en,
                            !!(s->output_flags & ROCKCHIP_OUTPUT_DSI_DUAL));
                break;
        case DRM_MODE_CONNECTOR_DisplayPort:
                pin_pol &= ~BIT(DCLK_INVERT);
                VOP_REG_SET(vop, output, dp_pin_pol, pin_pol);
                VOP_REG_SET(vop, output, dp_en, 1);
                break;
        default:
                DRM_DEV_ERROR(vop->dev, "unsupported connector_type [%d]\n",
                              s->output_type);
        }

        /*
         * if vop is not support RGB10 output, need force RGB10 to RGB888.
         */
        if (s->output_mode == ROCKCHIP_OUT_MODE_AAAA &&
            !(vop_data->feature & VOP_FEATURE_OUTPUT_RGB10))
                s->output_mode = ROCKCHIP_OUT_MODE_P888;

        if (s->output_mode == ROCKCHIP_OUT_MODE_AAAA && dither_bpc <= 8)
                VOP_REG_SET(vop, common, pre_dither_down, 1);
        else
                VOP_REG_SET(vop, common, pre_dither_down, 0);

        if (dither_bpc == 6) {
                VOP_REG_SET(vop, common, dither_down_sel, DITHER_DOWN_ALLEGRO);
                VOP_REG_SET(vop, common, dither_down_mode, RGB888_TO_RGB666);
                VOP_REG_SET(vop, common, dither_down_en, 1);
        } else {
                VOP_REG_SET(vop, common, dither_down_en, 0);
        }

        VOP_REG_SET(vop, common, out_mode, s->output_mode);

        VOP_REG_SET(vop, modeset, htotal_pw, (htotal << 16) | hsync_len);
        val = hact_st << 16;
        val |= hact_end;
        VOP_REG_SET(vop, modeset, hact_st_end, val);
        VOP_REG_SET(vop, modeset, hpost_st_end, val);

        VOP_REG_SET(vop, modeset, vtotal_pw, (vtotal << 16) | vsync_len);
        val = vact_st << 16;
        val |= vact_end;
        VOP_REG_SET(vop, modeset, vact_st_end, val);
        VOP_REG_SET(vop, modeset, vpost_st_end, val);

        VOP_REG_SET(vop, intr, line_flag_num[0], vact_end);

        clk_set_rate(vop->dclk, adjusted_mode->clock * 1000);

        VOP_REG_SET(vop, common, standby, 0);
        mutex_unlock(&vop->vop_lock);
}

static bool vop_fs_irq_is_pending(struct vop *vop)
{
        return VOP_INTR_GET_TYPE(vop, status, FS_INTR);
}

static void vop_wait_for_irq_handler(struct vop *vop)
{
        bool pending;
        int ret;

        /*
         * Spin until frame start interrupt status bit goes low, which means
         * that interrupt handler was invoked and cleared it. The timeout of
         * 10 msecs is really too long, but it is just a safety measure if
         * something goes really wrong. The wait will only happen in the very
         * unlikely case of a vblank happening exactly at the same time and
         * shouldn't exceed microseconds range.
         */
        ret = readx_poll_timeout_atomic(vop_fs_irq_is_pending, vop, pending,
                                        !pending, 0, 10 * 1000);
        if (ret)
                DRM_DEV_ERROR(vop->dev, "VOP vblank IRQ stuck for 10 ms\n");

        synchronize_irq(vop->irq);
}

static void vop_crtc_atomic_flush(struct drm_crtc *crtc,
                                  struct drm_crtc_state *old_crtc_state)
{
        struct drm_atomic_state *old_state = old_crtc_state->state;
        struct drm_plane_state *old_plane_state, *new_plane_state;
        struct vop *vop = to_vop(crtc);
        struct drm_plane *plane;
        int i;

        if (WARN_ON(!vop->is_enabled))
                return;

        spin_lock(&vop->reg_lock);

        vop_cfg_done(vop);

        spin_unlock(&vop->reg_lock);

        /*
         * There is a (rather unlikely) possiblity that a vblank interrupt
         * fired before we set the cfg_done bit. To avoid spuriously
         * signalling flip completion we need to wait for it to finish.
         */
        vop_wait_for_irq_handler(vop);

        spin_lock_irq(&crtc->dev->event_lock);
        if (crtc->state->event) {
                WARN_ON(drm_crtc_vblank_get(crtc) != 0);
                WARN_ON(vop->event);

                vop->event = crtc->state->event;
                crtc->state->event = NULL;
        }
        spin_unlock_irq(&crtc->dev->event_lock);

        for_each_oldnew_plane_in_state(old_state, plane, old_plane_state,
                                       new_plane_state, i) {
                if (!old_plane_state->fb)
                        continue;

                if (old_plane_state->fb == new_plane_state->fb)
                        continue;

                drm_framebuffer_get(old_plane_state->fb);
                WARN_ON(drm_crtc_vblank_get(crtc) != 0);
                drm_flip_work_queue(&vop->fb_unref_work, old_plane_state->fb);
                set_bit(VOP_PENDING_FB_UNREF, &vop->pending);
        }
}

static const struct drm_crtc_helper_funcs vop_crtc_helper_funcs = {
        .mode_fixup = vop_crtc_mode_fixup,
        .atomic_flush = vop_crtc_atomic_flush,
        .atomic_enable = vop_crtc_atomic_enable,
        .atomic_disable = vop_crtc_atomic_disable,
};

static void vop_crtc_destroy(struct drm_crtc *crtc)
{
        drm_crtc_cleanup(crtc);
}

static struct drm_crtc_state *vop_crtc_duplicate_state(struct drm_crtc *crtc)
{
        struct rockchip_crtc_state *rockchip_state;

        rockchip_state = kzalloc(sizeof(*rockchip_state), GFP_KERNEL);
        if (!rockchip_state)
                return NULL;

        __drm_atomic_helper_crtc_duplicate_state(crtc, &rockchip_state->base);
        return &rockchip_state->base;
}

static void vop_crtc_destroy_state(struct drm_crtc *crtc,
                                   struct drm_crtc_state *state)
{
        struct rockchip_crtc_state *s = to_rockchip_crtc_state(state);

        __drm_atomic_helper_crtc_destroy_state(&s->base);
        kfree(s);
}

static void vop_crtc_reset(struct drm_crtc *crtc)
{
        struct rockchip_crtc_state *crtc_state =
                kzalloc(sizeof(*crtc_state), GFP_KERNEL);

        if (crtc->state)
                vop_crtc_destroy_state(crtc, crtc->state);

        __drm_atomic_helper_crtc_reset(crtc, &crtc_state->base);
}

#ifdef CONFIG_DRM_ANALOGIX_DP
static struct drm_connector *vop_get_edp_connector(struct vop *vop)
{
        struct drm_connector *connector;
        struct drm_connector_list_iter conn_iter;

        drm_connector_list_iter_begin(vop->drm_dev, &conn_iter);
        drm_for_each_connector_iter(connector, &conn_iter) {
                if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
                        drm_connector_list_iter_end(&conn_iter);
                        return connector;
                }
        }
        drm_connector_list_iter_end(&conn_iter);

        return NULL;
}

static int vop_crtc_set_crc_source(struct drm_crtc *crtc,
                                   const char *source_name)
{
        struct vop *vop = to_vop(crtc);
        struct drm_connector *connector;
        int ret;

        connector = vop_get_edp_connector(vop);
        if (!connector)
                return -EINVAL;

        if (source_name && strcmp(source_name, "auto") == 0)
                ret = analogix_dp_start_crc(connector);
        else if (!source_name)
                ret = analogix_dp_stop_crc(connector);
        else
                ret = -EINVAL;

        return ret;
}

static int
vop_crtc_verify_crc_source(struct drm_crtc *crtc, const char *source_name,
                           size_t *values_cnt)
{
        if (source_name && strcmp(source_name, "auto") != 0)
                return -EINVAL;

        *values_cnt = 3;
        return 0;
}

#else
static int vop_crtc_set_crc_source(struct drm_crtc *crtc,
                                   const char *source_name)
{
        return -ENODEV;
}

static int
vop_crtc_verify_crc_source(struct drm_crtc *crtc, const char *source_name,
                           size_t *values_cnt)
{
        return -ENODEV;
}
#endif

static const struct drm_crtc_funcs vop_crtc_funcs = {
        .set_config = drm_atomic_helper_set_config,
        .page_flip = drm_atomic_helper_page_flip,
        .destroy = vop_crtc_destroy,
        .reset = vop_crtc_reset,
        .atomic_duplicate_state = vop_crtc_duplicate_state,
        .atomic_destroy_state = vop_crtc_destroy_state,
        .enable_vblank = vop_crtc_enable_vblank,
        .disable_vblank = vop_crtc_disable_vblank,
        .set_crc_source = vop_crtc_set_crc_source,
        .verify_crc_source = vop_crtc_verify_crc_source,
};

static void vop_fb_unref_worker(struct drm_flip_work *work, void *val)
{
        struct vop *vop = container_of(work, struct vop, fb_unref_work);
        struct drm_framebuffer *fb = val;

        drm_crtc_vblank_put(&vop->crtc);
        drm_framebuffer_put(fb);
}

static void vop_handle_vblank(struct vop *vop)
{
        struct drm_device *drm = vop->drm_dev;
        struct drm_crtc *crtc = &vop->crtc;

        spin_lock(&drm->event_lock);
        if (vop->event) {
                drm_crtc_send_vblank_event(crtc, vop->event);
                drm_crtc_vblank_put(crtc);
                vop->event = NULL;
        }
        spin_unlock(&drm->event_lock);

        if (test_and_clear_bit(VOP_PENDING_FB_UNREF, &vop->pending))
                drm_flip_work_commit(&vop->fb_unref_work, system_unbound_wq);
}

static irqreturn_t vop_isr(int irq, void *data)
{
        struct vop *vop = data;
        struct drm_crtc *crtc = &vop->crtc;
        uint32_t active_irqs;
        int ret = IRQ_NONE;

        /*
         * The irq is shared with the iommu. If the runtime-pm state of the
         * vop-device is disabled the irq has to be targeted at the iommu.
         */
        if (!pm_runtime_get_if_in_use(vop->dev))
                return IRQ_NONE;

        if (vop_core_clks_enable(vop)) {
                DRM_DEV_ERROR_RATELIMITED(vop->dev, "couldn't enable clocks\n");
                goto out;
        }

        /*
         * interrupt register has interrupt status, enable and clear bits, we
         * must hold irq_lock to avoid a race with enable/disable_vblank().
        */
        spin_lock(&vop->irq_lock);

        active_irqs = VOP_INTR_GET_TYPE(vop, status, INTR_MASK);
        /* Clear all active interrupt sources */
        if (active_irqs)
                VOP_INTR_SET_TYPE(vop, clear, active_irqs, 1);

        spin_unlock(&vop->irq_lock);

        /* This is expected for vop iommu irqs, since the irq is shared */
        if (!active_irqs)
                goto out_disable;

        if (active_irqs & DSP_HOLD_VALID_INTR) {
                complete(&vop->dsp_hold_completion);
                active_irqs &= ~DSP_HOLD_VALID_INTR;
                ret = IRQ_HANDLED;
        }

        if (active_irqs & LINE_FLAG_INTR) {
                complete(&vop->line_flag_completion);
                active_irqs &= ~LINE_FLAG_INTR;
                ret = IRQ_HANDLED;
        }

        if (active_irqs & FS_INTR) {
                drm_crtc_handle_vblank(crtc);
                vop_handle_vblank(vop);
                active_irqs &= ~FS_INTR;
                ret = IRQ_HANDLED;
        }

        /* Unhandled irqs are spurious. */
        if (active_irqs)
                DRM_DEV_ERROR(vop->dev, "Unknown VOP IRQs: %#02x\n",
                              active_irqs);

out_disable:
        vop_core_clks_disable(vop);
out:
        pm_runtime_put(vop->dev);
        return ret;
}

static void vop_plane_add_properties(struct drm_plane *plane,
                                     const struct vop_win_data *win_data)
{
        unsigned int flags = 0;

        flags |= VOP_WIN_HAS_REG(win_data, x_mir_en) ? DRM_MODE_REFLECT_X : 0;
        flags |= VOP_WIN_HAS_REG(win_data, y_mir_en) ? DRM_MODE_REFLECT_Y : 0;
        if (flags)
                drm_plane_create_rotation_property(plane, DRM_MODE_ROTATE_0,
                                                   DRM_MODE_ROTATE_0 | flags);
}

static int vop_create_crtc(struct vop *vop)
{
        const struct vop_data *vop_data = vop->data;
        struct device *dev = vop->dev;
        struct drm_device *drm_dev = vop->drm_dev;
        struct drm_plane *primary = NULL, *cursor = NULL, *plane, *tmp;
        struct drm_crtc *crtc = &vop->crtc;
        struct device_node *port;
        int ret;
        int i;

        /*
         * Create drm_plane for primary and cursor planes first, since we need
         * to pass them to drm_crtc_init_with_planes, which sets the
         * "possible_crtcs" to the newly initialized crtc.
         */
        for (i = 0; i < vop_data->win_size; i++) {
                struct vop_win *vop_win = &vop->win[i];
                const struct vop_win_data *win_data = vop_win->data;

                if (win_data->type != DRM_PLANE_TYPE_PRIMARY &&
                    win_data->type != DRM_PLANE_TYPE_CURSOR)
                        continue;

                ret = drm_universal_plane_init(vop->drm_dev, &vop_win->base,
                                               0, &vop_plane_funcs,
                                               win_data->phy->data_formats,
                                               win_data->phy->nformats,
                                               NULL, win_data->type, NULL);
                if (ret) {
                        DRM_DEV_ERROR(vop->dev, "failed to init plane %d\n",
                                      ret);
                        goto err_cleanup_planes;
                }

                plane = &vop_win->base;
                drm_plane_helper_add(plane, &plane_helper_funcs);
                vop_plane_add_properties(plane, win_data);
                if (plane->type == DRM_PLANE_TYPE_PRIMARY)
                        primary = plane;
                else if (plane->type == DRM_PLANE_TYPE_CURSOR)
                        cursor = plane;
        }

        ret = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
                                        &vop_crtc_funcs, NULL);
        if (ret)
                goto err_cleanup_planes;

        drm_crtc_helper_add(crtc, &vop_crtc_helper_funcs);

        /*
         * Create drm_planes for overlay windows with possible_crtcs restricted
         * to the newly created crtc.
         */
        for (i = 0; i < vop_data->win_size; i++) {
                struct vop_win *vop_win = &vop->win[i];
                const struct vop_win_data *win_data = vop_win->data;
                unsigned long possible_crtcs = drm_crtc_mask(crtc);

                if (win_data->type != DRM_PLANE_TYPE_OVERLAY)
                        continue;

                ret = drm_universal_plane_init(vop->drm_dev, &vop_win->base,
                                               possible_crtcs,
                                               &vop_plane_funcs,
                                               win_data->phy->data_formats,
                                               win_data->phy->nformats,
                                               NULL, win_data->type, NULL);
                if (ret) {
                        DRM_DEV_ERROR(vop->dev, "failed to init overlay %d\n",
                                      ret);
                        goto err_cleanup_crtc;
                }
                drm_plane_helper_add(&vop_win->base, &plane_helper_funcs);
                vop_plane_add_properties(&vop_win->base, win_data);
        }

        port = of_get_child_by_name(dev->of_node, "port");
        if (!port) {
                DRM_DEV_ERROR(vop->dev, "no port node found in %pOF\n",
                              dev->of_node);
                ret = -ENOENT;
                goto err_cleanup_crtc;
        }

        drm_flip_work_init(&vop->fb_unref_work, "fb_unref",
                           vop_fb_unref_worker);

        init_completion(&vop->dsp_hold_completion);
        init_completion(&vop->line_flag_completion);
        crtc->port = port;

        return 0;

err_cleanup_crtc:
        drm_crtc_cleanup(crtc);
err_cleanup_planes:
        list_for_each_entry_safe(plane, tmp, &drm_dev->mode_config.plane_list,
                                 head)
                drm_plane_cleanup(plane);
        return ret;
}

static void vop_destroy_crtc(struct vop *vop)
{
        struct drm_crtc *crtc = &vop->crtc;
        struct drm_device *drm_dev = vop->drm_dev;
        struct drm_plane *plane, *tmp;

        of_node_put(crtc->port);

        /*
         * We need to cleanup the planes now.  Why?
         *
         * The planes are "&vop->win[i].base".  That means the memory is
         * all part of the big "struct vop" chunk of memory.  That memory
         * was devm allocated and associated with this component.  We need to
         * free it ourselves before vop_unbind() finishes.
         */
        list_for_each_entry_safe(plane, tmp, &drm_dev->mode_config.plane_list,
                                 head)
                vop_plane_destroy(plane);

        /*
         * Destroy CRTC after vop_plane_destroy() since vop_disable_plane()
         * references the CRTC.
         */
        drm_crtc_cleanup(crtc);
        drm_flip_work_cleanup(&vop->fb_unref_work);
}

static int vop_initial(struct vop *vop)
{
        const struct vop_data *vop_data = vop->data;
        struct reset_control *ahb_rst;
        int i, ret;

        vop->hclk = devm_clk_get(vop->dev, "hclk_vop");
        if (IS_ERR(vop->hclk)) {
                DRM_DEV_ERROR(vop->dev, "failed to get hclk source\n");
                return PTR_ERR(vop->hclk);
        }
        vop->aclk = devm_clk_get(vop->dev, "aclk_vop");
        if (IS_ERR(vop->aclk)) {
                DRM_DEV_ERROR(vop->dev, "failed to get aclk source\n");
                return PTR_ERR(vop->aclk);
        }
        vop->dclk = devm_clk_get(vop->dev, "dclk_vop");
        if (IS_ERR(vop->dclk)) {
                DRM_DEV_ERROR(vop->dev, "failed to get dclk source\n");
                return PTR_ERR(vop->dclk);
        }

        ret = pm_runtime_get_sync(vop->dev);
        if (ret < 0) {
                DRM_DEV_ERROR(vop->dev, "failed to get pm runtime: %d\n", ret);
                return ret;
        }

        ret = clk_prepare(vop->dclk);
        if (ret < 0) {
                DRM_DEV_ERROR(vop->dev, "failed to prepare dclk\n");
                goto err_put_pm_runtime;
        }

        /* Enable both the hclk and aclk to setup the vop */
        ret = clk_prepare_enable(vop->hclk);
        if (ret < 0) {
                DRM_DEV_ERROR(vop->dev, "failed to prepare/enable hclk\n");
                goto err_unprepare_dclk;
        }

        ret = clk_prepare_enable(vop->aclk);
        if (ret < 0) {
                DRM_DEV_ERROR(vop->dev, "failed to prepare/enable aclk\n");
                goto err_disable_hclk;
        }

        /*
         * do hclk_reset, reset all vop registers.
         */
        ahb_rst = devm_reset_control_get(vop->dev, "ahb");
        if (IS_ERR(ahb_rst)) {
                DRM_DEV_ERROR(vop->dev, "failed to get ahb reset\n");
                ret = PTR_ERR(ahb_rst);
                goto err_disable_aclk;
        }
        reset_control_assert(ahb_rst);
        usleep_range(10, 20);
        reset_control_deassert(ahb_rst);

        VOP_INTR_SET_TYPE(vop, clear, INTR_MASK, 1);
        VOP_INTR_SET_TYPE(vop, enable, INTR_MASK, 0);

        for (i = 0; i < vop->len; i += sizeof(u32))
                vop->regsbak[i / 4] = readl_relaxed(vop->regs + i);

        VOP_REG_SET(vop, misc, global_regdone_en, 1);
        VOP_REG_SET(vop, common, dsp_blank, 0);

        for (i = 0; i < vop_data->win_size; i++) {
                const struct vop_win_data *win = &vop_data->win[i];
                int channel = i * 2 + 1;

                VOP_WIN_SET(vop, win, channel, (channel + 1) << 4 | channel);
                vop_win_disable(vop, win);
                VOP_WIN_SET(vop, win, gate, 1);
        }

        vop_cfg_done(vop);

        /*
         * do dclk_reset, let all config take affect.
         */
        vop->dclk_rst = devm_reset_control_get(vop->dev, "dclk");
        if (IS_ERR(vop->dclk_rst)) {
                DRM_DEV_ERROR(vop->dev, "failed to get dclk reset\n");
                ret = PTR_ERR(vop->dclk_rst);
                goto err_disable_aclk;
        }
        reset_control_assert(vop->dclk_rst);
        usleep_range(10, 20);
        reset_control_deassert(vop->dclk_rst);

        clk_disable(vop->hclk);
        clk_disable(vop->aclk);

        vop->is_enabled = false;

        pm_runtime_put_sync(vop->dev);

        return 0;

err_disable_aclk:
        clk_disable_unprepare(vop->aclk);
err_disable_hclk:
        clk_disable_unprepare(vop->hclk);
err_unprepare_dclk:
        clk_unprepare(vop->dclk);
err_put_pm_runtime:
        pm_runtime_put_sync(vop->dev);
        return ret;
}

/*
 * Initialize the vop->win array elements.
 */
static void vop_win_init(struct vop *vop)
{
        const struct vop_data *vop_data = vop->data;
        unsigned int i;

        for (i = 0; i < vop_data->win_size; i++) {
                struct vop_win *vop_win = &vop->win[i];
                const struct vop_win_data *win_data = &vop_data->win[i];

                vop_win->data = win_data;
                vop_win->vop = vop;

                if (vop_data->win_yuv2yuv)
                        vop_win->yuv2yuv_data = &vop_data->win_yuv2yuv[i];
        }
}

/**
 * rockchip_drm_wait_vact_end
 * @crtc: CRTC to enable line flag
 * @mstimeout: millisecond for timeout
 *
 * Wait for vact_end line flag irq or timeout.
 *
 * Returns:
 * Zero on success, negative errno on failure.
 */
int rockchip_drm_wait_vact_end(struct drm_crtc *crtc, unsigned int mstimeout)
{
        struct vop *vop = to_vop(crtc);
        unsigned long jiffies_left;
        int ret = 0;

        if (!crtc || !vop->is_enabled)
                return -ENODEV;

        mutex_lock(&vop->vop_lock);
        if (mstimeout <= 0) {
                ret = -EINVAL;
                goto out;
        }

        if (vop_line_flag_irq_is_enabled(vop)) {
                ret = -EBUSY;
                goto out;
        }

        reinit_completion(&vop->line_flag_completion);
        vop_line_flag_irq_enable(vop);

        jiffies_left = wait_for_completion_timeout(&vop->line_flag_completion,
                                                   msecs_to_jiffies(mstimeout));
        vop_line_flag_irq_disable(vop);

        if (jiffies_left == 0) {
                DRM_DEV_ERROR(vop->dev, "Timeout waiting for IRQ\n");
                ret = -ETIMEDOUT;
                goto out;
        }

out:
        mutex_unlock(&vop->vop_lock);
        return ret;
}
EXPORT_SYMBOL(rockchip_drm_wait_vact_end);

static int vop_bind(struct device *dev, struct device *master, void *data)
{
        struct platform_device *pdev = to_platform_device(dev);
        const struct vop_data *vop_data;
        struct drm_device *drm_dev = data;
        struct vop *vop;
        struct resource *res;
        int ret, irq;

        vop_data = of_device_get_match_data(dev);
        if (!vop_data)
                return -ENODEV;

        /* Allocate vop struct and its vop_win array */
        vop = devm_kzalloc(dev, struct_size(vop, win, vop_data->win_size),
                           GFP_KERNEL);
        if (!vop)
                return -ENOMEM;

        vop->dev = dev;
        vop->data = vop_data;
        vop->drm_dev = drm_dev;
        dev_set_drvdata(dev, vop);

        vop_win_init(vop);

        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        vop->len = resource_size(res);
        vop->regs = devm_ioremap_resource(dev, res);
        if (IS_ERR(vop->regs))
                return PTR_ERR(vop->regs);

        vop->regsbak = devm_kzalloc(dev, vop->len, GFP_KERNEL);
        if (!vop->regsbak)
                return -ENOMEM;

        irq = platform_get_irq(pdev, 0);
        if (irq < 0) {
                DRM_DEV_ERROR(dev, "cannot find irq for vop\n");
                return irq;
        }
        vop->irq = (unsigned int)irq;

        spin_lock_init(&vop->reg_lock);
        spin_lock_init(&vop->irq_lock);
        mutex_init(&vop->vop_lock);

        ret = vop_create_crtc(vop);
        if (ret)
                return ret;

        pm_runtime_enable(&pdev->dev);

        ret = vop_initial(vop);
        if (ret < 0) {
                DRM_DEV_ERROR(&pdev->dev,
                              "cannot initial vop dev - err %d\n", ret);
                goto err_disable_pm_runtime;
        }

        ret = devm_request_irq(dev, vop->irq, vop_isr,
                               IRQF_SHARED, dev_name(dev), vop);
        if (ret)
                goto err_disable_pm_runtime;

        if (vop->data->feature & VOP_FEATURE_INTERNAL_RGB) {
                vop->rgb = rockchip_rgb_init(dev, &vop->crtc, vop->drm_dev);
                if (IS_ERR(vop->rgb)) {
                        ret = PTR_ERR(vop->rgb);
                        goto err_disable_pm_runtime;
                }
        }

        return 0;

err_disable_pm_runtime:
        pm_runtime_disable(&pdev->dev);
        vop_destroy_crtc(vop);
        return ret;
}

static void vop_unbind(struct device *dev, struct device *master, void *data)
{
        struct vop *vop = dev_get_drvdata(dev);

        if (vop->rgb)
                rockchip_rgb_fini(vop->rgb);

        pm_runtime_disable(dev);
        vop_destroy_crtc(vop);

        clk_unprepare(vop->aclk);
        clk_unprepare(vop->hclk);
        clk_unprepare(vop->dclk);
}

const struct component_ops vop_component_ops = {
        .bind = vop_bind,
        .unbind = vop_unbind,
};
EXPORT_SYMBOL_GPL(vop_component_ops);