/*
 * Copyright (c) 2014-2015 The Linux Foundation. All rights reserved.
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <robdclark@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "mdp5_kms.h"

#include <linux/sort.h>
#include <drm/drm_mode.h>
#include "drm_crtc.h"
#include "drm_crtc_helper.h"
#include "drm_flip_work.h"

#define CURSOR_WIDTH    64
#define CURSOR_HEIGHT   64

#define SSPP_MAX        (SSPP_RGB3 + 1) /* TODO: Add SSPP_MAX in mdp5.xml.h */

struct mdp5_crtc {
        struct drm_crtc base;
        char name[8];
        int id;
        bool enabled;

        /* layer mixer used for this CRTC (+ its lock): */
#define GET_LM_ID(crtc_id)      ((crtc_id == 3) ? 5 : crtc_id)
        int lm;
        spinlock_t lm_lock;     /* protect REG_MDP5_LM_* registers */

        /* CTL used for this CRTC: */
        struct mdp5_ctl *ctl;

        /* if there is a pending flip, these will be non-null: */
        struct drm_pending_vblank_event *event;

        /* Bits have been flushed at the last commit,
         * used to decide if a vsync has happened since last commit.
         */
        u32 flushed_mask;

#define PENDING_CURSOR 0x1
#define PENDING_FLIP   0x2
        atomic_t pending;

        /* for unref'ing cursor bo's after scanout completes: */
        struct drm_flip_work unref_cursor_work;

        struct mdp_irq vblank;
        struct mdp_irq err;
        struct mdp_irq pp_done;

        struct completion pp_completion;

        bool cmd_mode;

        struct {
                /* protect REG_MDP5_LM_CURSOR* registers and cursor scanout_bo*/
                spinlock_t lock;

                /* current cursor being scanned out: */
                struct drm_gem_object *scanout_bo;
                uint32_t width, height;
                uint32_t x, y;
        } cursor;
};
#define to_mdp5_crtc(x) container_of(x, struct mdp5_crtc, base)

static struct mdp5_kms *get_kms(struct drm_crtc *crtc)
{
        struct msm_drm_private *priv = crtc->dev->dev_private;
        return to_mdp5_kms(to_mdp_kms(priv->kms));
}

static void request_pending(struct drm_crtc *crtc, uint32_t pending)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);

        atomic_or(pending, &mdp5_crtc->pending);
        mdp_irq_register(&get_kms(crtc)->base, &mdp5_crtc->vblank);
}

static void request_pp_done_pending(struct drm_crtc *crtc)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        reinit_completion(&mdp5_crtc->pp_completion);
}

static u32 crtc_flush(struct drm_crtc *crtc, u32 flush_mask)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);

        DBG("%s: flush=%08x", mdp5_crtc->name, flush_mask);
        return mdp5_ctl_commit(mdp5_crtc->ctl, flush_mask);
}

/*
 * flush updates, to make sure hw is updated to new scanout fb,
 * so that we can safely queue unref to current fb (ie. next
 * vblank we know hw is done w/ previous scanout_fb).
 */
static u32 crtc_flush_all(struct drm_crtc *crtc)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        struct drm_plane *plane;
        uint32_t flush_mask = 0;

        /* this should not happen: */
        if (WARN_ON(!mdp5_crtc->ctl))
                return 0;

        drm_atomic_crtc_for_each_plane(plane, crtc) {
                flush_mask |= mdp5_plane_get_flush(plane);
        }

        flush_mask |= mdp_ctl_flush_mask_lm(mdp5_crtc->lm);

        return crtc_flush(crtc, flush_mask);
}

/* if file!=NULL, this is preclose potential cancel-flip path */
static void complete_flip(struct drm_crtc *crtc, struct drm_file *file)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        struct drm_device *dev = crtc->dev;
        struct drm_pending_vblank_event *event;
        struct drm_plane *plane;
        unsigned long flags;

        spin_lock_irqsave(&dev->event_lock, flags);
        event = mdp5_crtc->event;
        if (event) {
                /* if regular vblank case (!file) or if cancel-flip from
                 * preclose on file that requested flip, then send the
                 * event:
                 */
                if (!file || (event->base.file_priv == file)) {
                        mdp5_crtc->event = NULL;
                        DBG("%s: send event: %p", mdp5_crtc->name, event);
                        drm_send_vblank_event(dev, mdp5_crtc->id, event);
                }
        }
        spin_unlock_irqrestore(&dev->event_lock, flags);

        drm_atomic_crtc_for_each_plane(plane, crtc) {
                mdp5_plane_complete_flip(plane);
        }

        if (mdp5_crtc->ctl && !crtc->state->enable) {
                /* set STAGE_UNUSED for all layers */
                mdp5_ctl_blend(mdp5_crtc->ctl, NULL, 0, 0);
                mdp5_crtc->ctl = NULL;
        }
}

static void unref_cursor_worker(struct drm_flip_work *work, void *val)
{
        struct mdp5_crtc *mdp5_crtc =
                container_of(work, struct mdp5_crtc, unref_cursor_work);
        struct mdp5_kms *mdp5_kms = get_kms(&mdp5_crtc->base);

        msm_gem_put_iova(val, mdp5_kms->id);
        drm_gem_object_unreference_unlocked(val);
}

static void mdp5_crtc_destroy(struct drm_crtc *crtc)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);

        drm_crtc_cleanup(crtc);
        drm_flip_work_cleanup(&mdp5_crtc->unref_cursor_work);

        kfree(mdp5_crtc);
}

/*
 * blend_setup() - blend all the planes of a CRTC
 *
 * If no base layer is available, border will be enabled as the base layer.
 * Otherwise all layers will be blended based on their stage calculated
 * in mdp5_crtc_atomic_check.
 */
static void blend_setup(struct drm_crtc *crtc)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        struct mdp5_kms *mdp5_kms = get_kms(crtc);
        struct drm_plane *plane;
        const struct mdp5_cfg_hw *hw_cfg;
        struct mdp5_plane_state *pstate, *pstates[STAGE_MAX + 1] = {NULL};
        const struct mdp_format *format;
        uint32_t lm = mdp5_crtc->lm;
        uint32_t blend_op, fg_alpha, bg_alpha, ctl_blend_flags = 0;
        unsigned long flags;
        uint8_t stage[STAGE_MAX + 1];
        int i, plane_cnt = 0;
#define blender(stage)  ((stage) - STAGE0)

        hw_cfg = mdp5_cfg_get_hw_config(mdp5_kms->cfg);

        spin_lock_irqsave(&mdp5_crtc->lm_lock, flags);

        /* ctl could be released already when we are shutting down: */
        if (!mdp5_crtc->ctl)
                goto out;

        /* Collect all plane information */
        drm_atomic_crtc_for_each_plane(plane, crtc) {
                pstate = to_mdp5_plane_state(plane->state);
                pstates[pstate->stage] = pstate;
                stage[pstate->stage] = mdp5_plane_pipe(plane);
                plane_cnt++;
        }

        /*
        * If there is no base layer, enable border color.
        * Although it's not possbile in current blend logic,
        * put it here as a reminder.
        */
        if (!pstates[STAGE_BASE] && plane_cnt) {
                ctl_blend_flags |= MDP5_CTL_BLEND_OP_FLAG_BORDER_OUT;
                DBG("Border Color is enabled");
        }

        /* The reset for blending */
        for (i = STAGE0; i <= STAGE_MAX; i++) {
                if (!pstates[i])
                        continue;

                format = to_mdp_format(
                        msm_framebuffer_format(pstates[i]->base.fb));
                plane = pstates[i]->base.plane;
                blend_op = MDP5_LM_BLEND_OP_MODE_FG_ALPHA(FG_CONST) |
                        MDP5_LM_BLEND_OP_MODE_BG_ALPHA(BG_CONST);
                fg_alpha = pstates[i]->alpha;
                bg_alpha = 0xFF - pstates[i]->alpha;
                DBG("Stage %d fg_alpha %x bg_alpha %x", i, fg_alpha, bg_alpha);

                if (format->alpha_enable && pstates[i]->premultiplied) {
                        blend_op = MDP5_LM_BLEND_OP_MODE_FG_ALPHA(FG_CONST) |
                                MDP5_LM_BLEND_OP_MODE_BG_ALPHA(FG_PIXEL);
                        if (fg_alpha != 0xff) {
                                bg_alpha = fg_alpha;
                                blend_op |=
                                        MDP5_LM_BLEND_OP_MODE_BG_MOD_ALPHA |
                                        MDP5_LM_BLEND_OP_MODE_BG_INV_MOD_ALPHA;
                        } else {
                                blend_op |= MDP5_LM_BLEND_OP_MODE_BG_INV_ALPHA;
                        }
                } else if (format->alpha_enable) {
                        blend_op = MDP5_LM_BLEND_OP_MODE_FG_ALPHA(FG_PIXEL) |
                                MDP5_LM_BLEND_OP_MODE_BG_ALPHA(FG_PIXEL);
                        if (fg_alpha != 0xff) {
                                bg_alpha = fg_alpha;
                                blend_op |=
                                       MDP5_LM_BLEND_OP_MODE_FG_MOD_ALPHA |
                                       MDP5_LM_BLEND_OP_MODE_FG_INV_MOD_ALPHA |
                                       MDP5_LM_BLEND_OP_MODE_BG_MOD_ALPHA |
                                       MDP5_LM_BLEND_OP_MODE_BG_INV_MOD_ALPHA;
                        } else {
                                blend_op |= MDP5_LM_BLEND_OP_MODE_BG_INV_ALPHA;
                        }
                }

                mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_OP_MODE(lm,
                                blender(i)), blend_op);
                mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_FG_ALPHA(lm,
                                blender(i)), fg_alpha);
                mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_BG_ALPHA(lm,
                                blender(i)), bg_alpha);
        }

        mdp5_ctl_blend(mdp5_crtc->ctl, stage, plane_cnt, ctl_blend_flags);

out:
        spin_unlock_irqrestore(&mdp5_crtc->lm_lock, flags);
}

static void mdp5_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        struct mdp5_kms *mdp5_kms = get_kms(crtc);
        unsigned long flags;
        struct drm_display_mode *mode;

        if (WARN_ON(!crtc->state))
                return;

        mode = &crtc->state->adjusted_mode;

        DBG("%s: set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
                        mdp5_crtc->name, mode->base.id, mode->name,
                        mode->vrefresh, mode->clock,
                        mode->hdisplay, mode->hsync_start,
                        mode->hsync_end, mode->htotal,
                        mode->vdisplay, mode->vsync_start,
                        mode->vsync_end, mode->vtotal,
                        mode->type, mode->flags);

        spin_lock_irqsave(&mdp5_crtc->lm_lock, flags);
        mdp5_write(mdp5_kms, REG_MDP5_LM_OUT_SIZE(mdp5_crtc->lm),
                        MDP5_LM_OUT_SIZE_WIDTH(mode->hdisplay) |
                        MDP5_LM_OUT_SIZE_HEIGHT(mode->vdisplay));
        spin_unlock_irqrestore(&mdp5_crtc->lm_lock, flags);
}

static void mdp5_crtc_disable(struct drm_crtc *crtc)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        struct mdp5_kms *mdp5_kms = get_kms(crtc);

        DBG("%s", mdp5_crtc->name);

        if (WARN_ON(!mdp5_crtc->enabled))
                return;

        if (mdp5_crtc->cmd_mode)
                mdp_irq_unregister(&mdp5_kms->base, &mdp5_crtc->pp_done);

        mdp_irq_unregister(&mdp5_kms->base, &mdp5_crtc->err);
        mdp5_disable(mdp5_kms);

        mdp5_crtc->enabled = false;
}

static void mdp5_crtc_enable(struct drm_crtc *crtc)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        struct mdp5_kms *mdp5_kms = get_kms(crtc);

        DBG("%s", mdp5_crtc->name);

        if (WARN_ON(mdp5_crtc->enabled))
                return;

        mdp5_enable(mdp5_kms);
        mdp_irq_register(&mdp5_kms->base, &mdp5_crtc->err);

        if (mdp5_crtc->cmd_mode)
                mdp_irq_register(&mdp5_kms->base, &mdp5_crtc->pp_done);

        mdp5_crtc->enabled = true;
}

struct plane_state {
        struct drm_plane *plane;
        struct mdp5_plane_state *state;
};

static int pstate_cmp(const void *a, const void *b)
{
        struct plane_state *pa = (struct plane_state *)a;
        struct plane_state *pb = (struct plane_state *)b;
        return pa->state->zpos - pb->state->zpos;
}

static int mdp5_crtc_atomic_check(struct drm_crtc *crtc,
                struct drm_crtc_state *state)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        struct mdp5_kms *mdp5_kms = get_kms(crtc);
        struct drm_plane *plane;
        struct drm_device *dev = crtc->dev;
        struct plane_state pstates[STAGE_MAX + 1];
        const struct mdp5_cfg_hw *hw_cfg;
        int cnt = 0, i;

        DBG("%s: check", mdp5_crtc->name);

        /* verify that there are not too many planes attached to crtc
         * and that we don't have conflicting mixer stages:
         */
        hw_cfg = mdp5_cfg_get_hw_config(mdp5_kms->cfg);
        drm_atomic_crtc_state_for_each_plane(plane, state) {
                struct drm_plane_state *pstate;
                if (cnt >= (hw_cfg->lm.nb_stages)) {
                        dev_err(dev->dev, "too many planes!\n");
                        return -EINVAL;
                }

                pstate = state->state->plane_states[drm_plane_index(plane)];

                /* plane might not have changed, in which case take
                 * current state:
                 */
                if (!pstate)
                        pstate = plane->state;
                pstates[cnt].plane = plane;
                pstates[cnt].state = to_mdp5_plane_state(pstate);

                cnt++;
        }

        /* assign a stage based on sorted zpos property */
        sort(pstates, cnt, sizeof(pstates[0]), pstate_cmp, NULL);

        for (i = 0; i < cnt; i++) {
                pstates[i].state->stage = STAGE_BASE + i;
                DBG("%s: assign pipe %s on stage=%d", mdp5_crtc->name,
                                pipe2name(mdp5_plane_pipe(pstates[i].plane)),
                                pstates[i].state->stage);
        }

        return 0;
}

static void mdp5_crtc_atomic_begin(struct drm_crtc *crtc,
                                   struct drm_crtc_state *old_crtc_state)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        DBG("%s: begin", mdp5_crtc->name);
}

static void mdp5_crtc_atomic_flush(struct drm_crtc *crtc,
                                   struct drm_crtc_state *old_crtc_state)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        struct drm_device *dev = crtc->dev;
        unsigned long flags;

        DBG("%s: event: %p", mdp5_crtc->name, crtc->state->event);

        WARN_ON(mdp5_crtc->event);

        spin_lock_irqsave(&dev->event_lock, flags);
        mdp5_crtc->event = crtc->state->event;
        spin_unlock_irqrestore(&dev->event_lock, flags);

        /*
         * If no CTL has been allocated in mdp5_crtc_atomic_check(),
         * it means we are trying to flush a CRTC whose state is disabled:
         * nothing else needs to be done.
         */
        if (unlikely(!mdp5_crtc->ctl))
                return;

        blend_setup(crtc);

        /* PP_DONE irq is only used by command mode for now.
         * It is better to request pending before FLUSH and START trigger
         * to make sure no pp_done irq missed.
         * This is safe because no pp_done will happen before SW trigger
         * in command mode.
         */
        if (mdp5_crtc->cmd_mode)
                request_pp_done_pending(crtc);

        mdp5_crtc->flushed_mask = crtc_flush_all(crtc);

        request_pending(crtc, PENDING_FLIP);
}

static void get_roi(struct drm_crtc *crtc, uint32_t *roi_w, uint32_t *roi_h)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        uint32_t xres = crtc->mode.hdisplay;
        uint32_t yres = crtc->mode.vdisplay;

        /*
         * Cursor Region Of Interest (ROI) is a plane read from cursor
         * buffer to render. The ROI region is determined by the visibility of
         * the cursor point. In the default Cursor image the cursor point will
         * be at the top left of the cursor image, unless it is specified
         * otherwise using hotspot feature.
         *
         * If the cursor point reaches the right (xres - x < cursor.width) or
         * bottom (yres - y < cursor.height) boundary of the screen, then ROI
         * width and ROI height need to be evaluated to crop the cursor image
         * accordingly.
         * (xres-x) will be new cursor width when x > (xres - cursor.width)
         * (yres-y) will be new cursor height when y > (yres - cursor.height)
         */
        *roi_w = min(mdp5_crtc->cursor.width, xres -
                        mdp5_crtc->cursor.x);
        *roi_h = min(mdp5_crtc->cursor.height, yres -
                        mdp5_crtc->cursor.y);
}

static int mdp5_crtc_cursor_set(struct drm_crtc *crtc,
                struct drm_file *file, uint32_t handle,
                uint32_t width, uint32_t height)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        struct drm_device *dev = crtc->dev;
        struct mdp5_kms *mdp5_kms = get_kms(crtc);
        struct drm_gem_object *cursor_bo, *old_bo = NULL;
        uint32_t blendcfg, cursor_addr, stride;
        int ret, bpp, lm;
        unsigned int depth;
        enum mdp5_cursor_alpha cur_alpha = CURSOR_ALPHA_PER_PIXEL;
        uint32_t flush_mask = mdp_ctl_flush_mask_cursor(0);
        uint32_t roi_w, roi_h;
        bool cursor_enable = true;
        unsigned long flags;

        if ((width > CURSOR_WIDTH) || (height > CURSOR_HEIGHT)) {
                dev_err(dev->dev, "bad cursor size: %dx%d\n", width, height);
                return -EINVAL;
        }

        if (NULL == mdp5_crtc->ctl)
                return -EINVAL;

        if (!handle) {
                DBG("Cursor off");
                cursor_enable = false;
                goto set_cursor;
        }

        cursor_bo = drm_gem_object_lookup(dev, file, handle);
        if (!cursor_bo)
                return -ENOENT;

        ret = msm_gem_get_iova(cursor_bo, mdp5_kms->id, &cursor_addr);
        if (ret)
                return -EINVAL;

        lm = mdp5_crtc->lm;
        drm_fb_get_bpp_depth(DRM_FORMAT_ARGB8888, &depth, &bpp);
        stride = width * (bpp >> 3);

        spin_lock_irqsave(&mdp5_crtc->cursor.lock, flags);
        old_bo = mdp5_crtc->cursor.scanout_bo;

        mdp5_crtc->cursor.scanout_bo = cursor_bo;
        mdp5_crtc->cursor.width = width;
        mdp5_crtc->cursor.height = height;

        get_roi(crtc, &roi_w, &roi_h);

        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_STRIDE(lm), stride);
        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_FORMAT(lm),
                        MDP5_LM_CURSOR_FORMAT_FORMAT(CURSOR_FMT_ARGB8888));
        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_IMG_SIZE(lm),
                        MDP5_LM_CURSOR_IMG_SIZE_SRC_H(height) |
                        MDP5_LM_CURSOR_IMG_SIZE_SRC_W(width));
        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_SIZE(lm),
                        MDP5_LM_CURSOR_SIZE_ROI_H(roi_h) |
                        MDP5_LM_CURSOR_SIZE_ROI_W(roi_w));
        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_BASE_ADDR(lm), cursor_addr);

        blendcfg = MDP5_LM_CURSOR_BLEND_CONFIG_BLEND_EN;
        blendcfg |= MDP5_LM_CURSOR_BLEND_CONFIG_BLEND_ALPHA_SEL(cur_alpha);
        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_BLEND_CONFIG(lm), blendcfg);

        spin_unlock_irqrestore(&mdp5_crtc->cursor.lock, flags);

set_cursor:
        ret = mdp5_ctl_set_cursor(mdp5_crtc->ctl, 0, cursor_enable);
        if (ret) {
                dev_err(dev->dev, "failed to %sable cursor: %d\n",
                                cursor_enable ? "en" : "dis", ret);
                goto end;
        }

        crtc_flush(crtc, flush_mask);

end:
        if (old_bo) {
                drm_flip_work_queue(&mdp5_crtc->unref_cursor_work, old_bo);
                /* enable vblank to complete cursor work: */
                request_pending(crtc, PENDING_CURSOR);
        }
        return ret;
}

static int mdp5_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
{
        struct mdp5_kms *mdp5_kms = get_kms(crtc);
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        uint32_t flush_mask = mdp_ctl_flush_mask_cursor(0);
        uint32_t roi_w;
        uint32_t roi_h;
        unsigned long flags;

        /* In case the CRTC is disabled, just drop the cursor update */
        if (unlikely(!crtc->state->enable))
                return 0;

        mdp5_crtc->cursor.x = x = max(x, 0);
        mdp5_crtc->cursor.y = y = max(y, 0);

        get_roi(crtc, &roi_w, &roi_h);

        spin_lock_irqsave(&mdp5_crtc->cursor.lock, flags);
        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_SIZE(mdp5_crtc->lm),
                        MDP5_LM_CURSOR_SIZE_ROI_H(roi_h) |
                        MDP5_LM_CURSOR_SIZE_ROI_W(roi_w));
        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_START_XY(mdp5_crtc->lm),
                        MDP5_LM_CURSOR_START_XY_Y_START(y) |
                        MDP5_LM_CURSOR_START_XY_X_START(x));
        spin_unlock_irqrestore(&mdp5_crtc->cursor.lock, flags);

        crtc_flush(crtc, flush_mask);

        return 0;
}

static const struct drm_crtc_funcs mdp5_crtc_funcs = {
        .set_config = drm_atomic_helper_set_config,
        .destroy = mdp5_crtc_destroy,
        .page_flip = drm_atomic_helper_page_flip,
        .set_property = drm_atomic_helper_crtc_set_property,
        .reset = drm_atomic_helper_crtc_reset,
        .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
        .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
        .cursor_set = mdp5_crtc_cursor_set,
        .cursor_move = mdp5_crtc_cursor_move,
};

static const struct drm_crtc_helper_funcs mdp5_crtc_helper_funcs = {
        .mode_set_nofb = mdp5_crtc_mode_set_nofb,
        .disable = mdp5_crtc_disable,
        .enable = mdp5_crtc_enable,
        .atomic_check = mdp5_crtc_atomic_check,
        .atomic_begin = mdp5_crtc_atomic_begin,
        .atomic_flush = mdp5_crtc_atomic_flush,
};

static void mdp5_crtc_vblank_irq(struct mdp_irq *irq, uint32_t irqstatus)
{
        struct mdp5_crtc *mdp5_crtc = container_of(irq, struct mdp5_crtc, vblank);
        struct drm_crtc *crtc = &mdp5_crtc->base;
        struct msm_drm_private *priv = crtc->dev->dev_private;
        unsigned pending;

        mdp_irq_unregister(&get_kms(crtc)->base, &mdp5_crtc->vblank);

        pending = atomic_xchg(&mdp5_crtc->pending, 0);

        if (pending & PENDING_FLIP) {
                complete_flip(crtc, NULL);
        }

        if (pending & PENDING_CURSOR)
                drm_flip_work_commit(&mdp5_crtc->unref_cursor_work, priv->wq);
}

static void mdp5_crtc_err_irq(struct mdp_irq *irq, uint32_t irqstatus)
{
        struct mdp5_crtc *mdp5_crtc = container_of(irq, struct mdp5_crtc, err);

        DBG("%s: error: %08x", mdp5_crtc->name, irqstatus);
}

static void mdp5_crtc_pp_done_irq(struct mdp_irq *irq, uint32_t irqstatus)
{
        struct mdp5_crtc *mdp5_crtc = container_of(irq, struct mdp5_crtc,
                                                                pp_done);

        complete(&mdp5_crtc->pp_completion);
}

static void mdp5_crtc_wait_for_pp_done(struct drm_crtc *crtc)
{
        struct drm_device *dev = crtc->dev;
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        int ret;

        ret = wait_for_completion_timeout(&mdp5_crtc->pp_completion,
                                                msecs_to_jiffies(50));
        if (ret == 0)
                dev_warn(dev->dev, "pp done time out, lm=%d\n", mdp5_crtc->lm);
}

static void mdp5_crtc_wait_for_flush_done(struct drm_crtc *crtc)
{
        struct drm_device *dev = crtc->dev;
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        int ret;

        /* Should not call this function if crtc is disabled. */
        if (!mdp5_crtc->ctl)
                return;

        ret = drm_crtc_vblank_get(crtc);
        if (ret)
                return;

        ret = wait_event_timeout(dev->vblank[drm_crtc_index(crtc)].queue,
                ((mdp5_ctl_get_commit_status(mdp5_crtc->ctl) &
                mdp5_crtc->flushed_mask) == 0),
                msecs_to_jiffies(50));
        if (ret <= 0)
                dev_warn(dev->dev, "vblank time out, crtc=%d\n", mdp5_crtc->id);

        mdp5_crtc->flushed_mask = 0;

        drm_crtc_vblank_put(crtc);
}

uint32_t mdp5_crtc_vblank(struct drm_crtc *crtc)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        return mdp5_crtc->vblank.irqmask;
}

void mdp5_crtc_set_pipeline(struct drm_crtc *crtc,
                struct mdp5_interface *intf, struct mdp5_ctl *ctl)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        struct mdp5_kms *mdp5_kms = get_kms(crtc);
        int lm = mdp5_crtc_get_lm(crtc);

        /* now that we know what irq's we want: */
        mdp5_crtc->err.irqmask = intf2err(intf->num);
        mdp5_crtc->vblank.irqmask = intf2vblank(lm, intf);

        if ((intf->type == INTF_DSI) &&
                (intf->mode == MDP5_INTF_DSI_MODE_COMMAND)) {
                mdp5_crtc->pp_done.irqmask = lm2ppdone(lm);
                mdp5_crtc->pp_done.irq = mdp5_crtc_pp_done_irq;
                mdp5_crtc->cmd_mode = true;
        } else {
                mdp5_crtc->pp_done.irqmask = 0;
                mdp5_crtc->pp_done.irq = NULL;
                mdp5_crtc->cmd_mode = false;
        }

        mdp_irq_update(&mdp5_kms->base);

        mdp5_crtc->ctl = ctl;
        mdp5_ctl_set_pipeline(ctl, intf, lm);
}

int mdp5_crtc_get_lm(struct drm_crtc *crtc)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        return WARN_ON(!crtc) ? -EINVAL : mdp5_crtc->lm;
}

void mdp5_crtc_wait_for_commit_done(struct drm_crtc *crtc)
{
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);

        if (mdp5_crtc->cmd_mode)
                mdp5_crtc_wait_for_pp_done(crtc);
        else
                mdp5_crtc_wait_for_flush_done(crtc);
}

/* initialize crtc */
struct drm_crtc *mdp5_crtc_init(struct drm_device *dev,
                struct drm_plane *plane, int id)
{
        struct drm_crtc *crtc = NULL;
        struct mdp5_crtc *mdp5_crtc;

        mdp5_crtc = kzalloc(sizeof(*mdp5_crtc), GFP_KERNEL);
        if (!mdp5_crtc)
                return ERR_PTR(-ENOMEM);

        crtc = &mdp5_crtc->base;

        mdp5_crtc->id = id;
        mdp5_crtc->lm = GET_LM_ID(id);

        spin_lock_init(&mdp5_crtc->lm_lock);
        spin_lock_init(&mdp5_crtc->cursor.lock);
        init_completion(&mdp5_crtc->pp_completion);

        mdp5_crtc->vblank.irq = mdp5_crtc_vblank_irq;
        mdp5_crtc->err.irq = mdp5_crtc_err_irq;

        snprintf(mdp5_crtc->name, sizeof(mdp5_crtc->name), "%s:%d",
                        pipe2name(mdp5_plane_pipe(plane)), id);

        drm_crtc_init_with_planes(dev, crtc, plane, NULL, &mdp5_crtc_funcs,
                                  NULL);

        drm_flip_work_init(&mdp5_crtc->unref_cursor_work,
                        "unref cursor", unref_cursor_worker);

        drm_crtc_helper_add(crtc, &mdp5_crtc_helper_funcs);
        plane->crtc = crtc;

        return crtc;
}