// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <robdclark@gmail.com>
 */

#define pr_fmt(fmt)     "[drm:%s:%d] " fmt, __func__, __LINE__
#include <linux/kthread.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>

#include "msm_drv.h"
#include "dpu_kms.h"
#include <drm/drm_crtc.h>
#include <drm/drm_probe_helper.h>
#include "dpu_hwio.h"
#include "dpu_hw_catalog.h"
#include "dpu_hw_intf.h"
#include "dpu_hw_ctl.h"
#include "dpu_formats.h"
#include "dpu_encoder_phys.h"
#include "dpu_crtc.h"
#include "dpu_trace.h"
#include "dpu_core_irq.h"

#define DPU_DEBUG_ENC(e, fmt, ...) DPU_DEBUG("enc%d " fmt,\
                (e) ? (e)->base.base.id : -1, ##__VA_ARGS__)

#define DPU_ERROR_ENC(e, fmt, ...) DPU_ERROR("enc%d " fmt,\
                (e) ? (e)->base.base.id : -1, ##__VA_ARGS__)

#define DPU_DEBUG_PHYS(p, fmt, ...) DPU_DEBUG("enc%d intf%d pp%d " fmt,\
                (p) ? (p)->parent->base.id : -1, \
                (p) ? (p)->intf_idx - INTF_0 : -1, \
                (p) ? ((p)->hw_pp ? (p)->hw_pp->idx - PINGPONG_0 : -1) : -1, \
                ##__VA_ARGS__)

#define DPU_ERROR_PHYS(p, fmt, ...) DPU_ERROR("enc%d intf%d pp%d " fmt,\
                (p) ? (p)->parent->base.id : -1, \
                (p) ? (p)->intf_idx - INTF_0 : -1, \
                (p) ? ((p)->hw_pp ? (p)->hw_pp->idx - PINGPONG_0 : -1) : -1, \
                ##__VA_ARGS__)

/*
 * Two to anticipate panels that can do cmd/vid dynamic switching
 * plan is to create all possible physical encoder types, and switch between
 * them at runtime
 */
#define NUM_PHYS_ENCODER_TYPES 2

#define MAX_PHYS_ENCODERS_PER_VIRTUAL \
        (MAX_H_TILES_PER_DISPLAY * NUM_PHYS_ENCODER_TYPES)

#define MAX_CHANNELS_PER_ENC 2

#define IDLE_SHORT_TIMEOUT      1

#define MAX_VDISPLAY_SPLIT 1080

/* timeout in frames waiting for frame done */
#define DPU_ENCODER_FRAME_DONE_TIMEOUT_FRAMES 5

/**
 * enum dpu_enc_rc_events - events for resource control state machine
 * @DPU_ENC_RC_EVENT_KICKOFF:
 *      This event happens at NORMAL priority.
 *      Event that signals the start of the transfer. When this event is
 *      received, enable MDP/DSI core clocks. Regardless of the previous
 *      state, the resource should be in ON state at the end of this event.
 * @DPU_ENC_RC_EVENT_FRAME_DONE:
 *      This event happens at INTERRUPT level.
 *      Event signals the end of the data transfer after the PP FRAME_DONE
 *      event. At the end of this event, a delayed work is scheduled to go to
 *      IDLE_PC state after IDLE_TIMEOUT time.
 * @DPU_ENC_RC_EVENT_PRE_STOP:
 *      This event happens at NORMAL priority.
 *      This event, when received during the ON state, leave the RC STATE
 *      in the PRE_OFF state. It should be followed by the STOP event as
 *      part of encoder disable.
 *      If received during IDLE or OFF states, it will do nothing.
 * @DPU_ENC_RC_EVENT_STOP:
 *      This event happens at NORMAL priority.
 *      When this event is received, disable all the MDP/DSI core clocks, and
 *      disable IRQs. It should be called from the PRE_OFF or IDLE states.
 *      IDLE is expected when IDLE_PC has run, and PRE_OFF did nothing.
 *      PRE_OFF is expected when PRE_STOP was executed during the ON state.
 *      Resource state should be in OFF at the end of the event.
 * @DPU_ENC_RC_EVENT_ENTER_IDLE:
 *      This event happens at NORMAL priority from a work item.
 *      Event signals that there were no frame updates for IDLE_TIMEOUT time.
 *      This would disable MDP/DSI core clocks and change the resource state
 *      to IDLE.
 */
enum dpu_enc_rc_events {
        DPU_ENC_RC_EVENT_KICKOFF = 1,
        DPU_ENC_RC_EVENT_FRAME_DONE,
        DPU_ENC_RC_EVENT_PRE_STOP,
        DPU_ENC_RC_EVENT_STOP,
        DPU_ENC_RC_EVENT_ENTER_IDLE
};

/*
 * enum dpu_enc_rc_states - states that the resource control maintains
 * @DPU_ENC_RC_STATE_OFF: Resource is in OFF state
 * @DPU_ENC_RC_STATE_PRE_OFF: Resource is transitioning to OFF state
 * @DPU_ENC_RC_STATE_ON: Resource is in ON state
 * @DPU_ENC_RC_STATE_MODESET: Resource is in modeset state
 * @DPU_ENC_RC_STATE_IDLE: Resource is in IDLE state
 */
enum dpu_enc_rc_states {
        DPU_ENC_RC_STATE_OFF,
        DPU_ENC_RC_STATE_PRE_OFF,
        DPU_ENC_RC_STATE_ON,
        DPU_ENC_RC_STATE_IDLE
};

/**
 * struct dpu_encoder_virt - virtual encoder. Container of one or more physical
 *      encoders. Virtual encoder manages one "logical" display. Physical
 *      encoders manage one intf block, tied to a specific panel/sub-panel.
 *      Virtual encoder defers as much as possible to the physical encoders.
 *      Virtual encoder registers itself with the DRM Framework as the encoder.
 * @base:               drm_encoder base class for registration with DRM
 * @enc_spinlock:       Virtual-Encoder-Wide Spin Lock for IRQ purposes
 * @bus_scaling_client: Client handle to the bus scaling interface
 * @enabled:            True if the encoder is active, protected by enc_lock
 * @num_phys_encs:      Actual number of physical encoders contained.
 * @phys_encs:          Container of physical encoders managed.
 * @cur_master:         Pointer to the current master in this mode. Optimization
 *                      Only valid after enable. Cleared as disable.
 * @hw_pp               Handle to the pingpong blocks used for the display. No.
 *                      pingpong blocks can be different than num_phys_encs.
 * @intfs_swapped       Whether or not the phys_enc interfaces have been swapped
 *                      for partial update right-only cases, such as pingpong
 *                      split where virtual pingpong does not generate IRQs
 * @crtc:               Pointer to the currently assigned crtc. Normally you
 *                      would use crtc->state->encoder_mask to determine the
 *                      link between encoder/crtc. However in this case we need
 *                      to track crtc in the disable() hook which is called
 *                      _after_ encoder_mask is cleared.
 * @crtc_kickoff_cb:            Callback into CRTC that will flush & start
 *                              all CTL paths
 * @crtc_kickoff_cb_data:       Opaque user data given to crtc_kickoff_cb
 * @debugfs_root:               Debug file system root file node
 * @enc_lock:                   Lock around physical encoder
 *                              create/destroy/enable/disable
 * @frame_busy_mask:            Bitmask tracking which phys_enc we are still
 *                              busy processing current command.
 *                              Bit0 = phys_encs[0] etc.
 * @crtc_frame_event_cb:        callback handler for frame event
 * @crtc_frame_event_cb_data:   callback handler private data
 * @frame_done_timeout_ms:      frame done timeout in ms
 * @frame_done_timer:           watchdog timer for frame done event
 * @vsync_event_timer:          vsync timer
 * @disp_info:                  local copy of msm_display_info struct
 * @idle_pc_supported:          indicate if idle power collaps is supported
 * @rc_lock:                    resource control mutex lock to protect
 *                              virt encoder over various state changes
 * @rc_state:                   resource controller state
 * @delayed_off_work:           delayed worker to schedule disabling of
 *                              clks and resources after IDLE_TIMEOUT time.
 * @vsync_event_work:           worker to handle vsync event for autorefresh
 * @topology:                   topology of the display
 * @mode_set_complete:          flag to indicate modeset completion
 * @idle_timeout:               idle timeout duration in milliseconds
 */
struct dpu_encoder_virt {
        struct drm_encoder base;
        spinlock_t enc_spinlock;
        uint32_t bus_scaling_client;

        bool enabled;

        unsigned int num_phys_encs;
        struct dpu_encoder_phys *phys_encs[MAX_PHYS_ENCODERS_PER_VIRTUAL];
        struct dpu_encoder_phys *cur_master;
        struct dpu_encoder_phys *cur_slave;
        struct dpu_hw_pingpong *hw_pp[MAX_CHANNELS_PER_ENC];

        bool intfs_swapped;

        struct drm_crtc *crtc;

        struct dentry *debugfs_root;
        struct mutex enc_lock;
        DECLARE_BITMAP(frame_busy_mask, MAX_PHYS_ENCODERS_PER_VIRTUAL);
        void (*crtc_frame_event_cb)(void *, u32 event);
        void *crtc_frame_event_cb_data;

        atomic_t frame_done_timeout_ms;
        struct timer_list frame_done_timer;
        struct timer_list vsync_event_timer;

        struct msm_display_info disp_info;

        bool idle_pc_supported;
        struct mutex rc_lock;
        enum dpu_enc_rc_states rc_state;
        struct delayed_work delayed_off_work;
        struct kthread_work vsync_event_work;
        struct msm_display_topology topology;
        bool mode_set_complete;

        u32 idle_timeout;
};

#define to_dpu_encoder_virt(x) container_of(x, struct dpu_encoder_virt, base)

void dpu_encoder_helper_report_irq_timeout(struct dpu_encoder_phys *phys_enc,
                enum dpu_intr_idx intr_idx)
{
        DRM_ERROR("irq timeout id=%u, intf=%d, pp=%d, intr=%d\n",
                  DRMID(phys_enc->parent), phys_enc->intf_idx - INTF_0,
                  phys_enc->hw_pp->idx - PINGPONG_0, intr_idx);

        if (phys_enc->parent_ops->handle_frame_done)
                phys_enc->parent_ops->handle_frame_done(
                                phys_enc->parent, phys_enc,
                                DPU_ENCODER_FRAME_EVENT_ERROR);
}

static int dpu_encoder_helper_wait_event_timeout(int32_t drm_id,
                int32_t hw_id, struct dpu_encoder_wait_info *info);

int dpu_encoder_helper_wait_for_irq(struct dpu_encoder_phys *phys_enc,
                enum dpu_intr_idx intr_idx,
                struct dpu_encoder_wait_info *wait_info)
{
        struct dpu_encoder_irq *irq;
        u32 irq_status;
        int ret;

        if (!phys_enc || !wait_info || intr_idx >= INTR_IDX_MAX) {
                DPU_ERROR("invalid params\n");
                return -EINVAL;
        }
        irq = &phys_enc->irq[intr_idx];

        /* note: do master / slave checking outside */

        /* return EWOULDBLOCK since we know the wait isn't necessary */
        if (phys_enc->enable_state == DPU_ENC_DISABLED) {
                DRM_ERROR("encoder is disabled id=%u, intr=%d, hw=%d, irq=%d",
                          DRMID(phys_enc->parent), intr_idx, irq->hw_idx,
                          irq->irq_idx);
                return -EWOULDBLOCK;
        }

        if (irq->irq_idx < 0) {
                DRM_DEBUG_KMS("skip irq wait id=%u, intr=%d, hw=%d, irq=%s",
                              DRMID(phys_enc->parent), intr_idx, irq->hw_idx,
                              irq->name);
                return 0;
        }

        DRM_DEBUG_KMS("id=%u, intr=%d, hw=%d, irq=%d, pp=%d, pending_cnt=%d",
                      DRMID(phys_enc->parent), intr_idx, irq->hw_idx,
                      irq->irq_idx, phys_enc->hw_pp->idx - PINGPONG_0,
                      atomic_read(wait_info->atomic_cnt));

        ret = dpu_encoder_helper_wait_event_timeout(
                        DRMID(phys_enc->parent),
                        irq->hw_idx,
                        wait_info);

        if (ret <= 0) {
                irq_status = dpu_core_irq_read(phys_enc->dpu_kms,
                                irq->irq_idx, true);
                if (irq_status) {
                        unsigned long flags;

                        DRM_DEBUG_KMS("irq not triggered id=%u, intr=%d, "
                                      "hw=%d, irq=%d, pp=%d, atomic_cnt=%d",
                                      DRMID(phys_enc->parent), intr_idx,
                                      irq->hw_idx, irq->irq_idx,
                                      phys_enc->hw_pp->idx - PINGPONG_0,
                                      atomic_read(wait_info->atomic_cnt));
                        local_irq_save(flags);
                        irq->cb.func(phys_enc, irq->irq_idx);
                        local_irq_restore(flags);
                        ret = 0;
                } else {
                        ret = -ETIMEDOUT;
                        DRM_DEBUG_KMS("irq timeout id=%u, intr=%d, "
                                      "hw=%d, irq=%d, pp=%d, atomic_cnt=%d",
                                      DRMID(phys_enc->parent), intr_idx,
                                      irq->hw_idx, irq->irq_idx,
                                      phys_enc->hw_pp->idx - PINGPONG_0,
                                      atomic_read(wait_info->atomic_cnt));
                }
        } else {
                ret = 0;
                trace_dpu_enc_irq_wait_success(DRMID(phys_enc->parent),
                        intr_idx, irq->hw_idx, irq->irq_idx,
                        phys_enc->hw_pp->idx - PINGPONG_0,
                        atomic_read(wait_info->atomic_cnt));
        }

        return ret;
}

int dpu_encoder_helper_register_irq(struct dpu_encoder_phys *phys_enc,
                enum dpu_intr_idx intr_idx)
{
        struct dpu_encoder_irq *irq;
        int ret = 0;

        if (!phys_enc || intr_idx >= INTR_IDX_MAX) {
                DPU_ERROR("invalid params\n");
                return -EINVAL;
        }
        irq = &phys_enc->irq[intr_idx];

        if (irq->irq_idx >= 0) {
                DPU_DEBUG_PHYS(phys_enc,
                                "skipping already registered irq %s type %d\n",
                                irq->name, irq->intr_type);
                return 0;
        }

        irq->irq_idx = dpu_core_irq_idx_lookup(phys_enc->dpu_kms,
                        irq->intr_type, irq->hw_idx);
        if (irq->irq_idx < 0) {
                DPU_ERROR_PHYS(phys_enc,
                        "failed to lookup IRQ index for %s type:%d\n",
                        irq->name, irq->intr_type);
                return -EINVAL;
        }

        ret = dpu_core_irq_register_callback(phys_enc->dpu_kms, irq->irq_idx,
                        &irq->cb);
        if (ret) {
                DPU_ERROR_PHYS(phys_enc,
                        "failed to register IRQ callback for %s\n",
                        irq->name);
                irq->irq_idx = -EINVAL;
                return ret;
        }

        ret = dpu_core_irq_enable(phys_enc->dpu_kms, &irq->irq_idx, 1);
        if (ret) {
                DRM_ERROR("enable failed id=%u, intr=%d, hw=%d, irq=%d",
                          DRMID(phys_enc->parent), intr_idx, irq->hw_idx,
                          irq->irq_idx);
                dpu_core_irq_unregister_callback(phys_enc->dpu_kms,
                                irq->irq_idx, &irq->cb);
                irq->irq_idx = -EINVAL;
                return ret;
        }

        trace_dpu_enc_irq_register_success(DRMID(phys_enc->parent), intr_idx,
                                irq->hw_idx, irq->irq_idx);

        return ret;
}

int dpu_encoder_helper_unregister_irq(struct dpu_encoder_phys *phys_enc,
                enum dpu_intr_idx intr_idx)
{
        struct dpu_encoder_irq *irq;
        int ret;

        if (!phys_enc) {
                DPU_ERROR("invalid encoder\n");
                return -EINVAL;
        }
        irq = &phys_enc->irq[intr_idx];

        /* silently skip irqs that weren't registered */
        if (irq->irq_idx < 0) {
                DRM_ERROR("duplicate unregister id=%u, intr=%d, hw=%d, irq=%d",
                          DRMID(phys_enc->parent), intr_idx, irq->hw_idx,
                          irq->irq_idx);
                return 0;
        }

        ret = dpu_core_irq_disable(phys_enc->dpu_kms, &irq->irq_idx, 1);
        if (ret) {
                DRM_ERROR("disable failed id=%u, intr=%d, hw=%d, irq=%d ret=%d",
                          DRMID(phys_enc->parent), intr_idx, irq->hw_idx,
                          irq->irq_idx, ret);
        }

        ret = dpu_core_irq_unregister_callback(phys_enc->dpu_kms, irq->irq_idx,
                        &irq->cb);
        if (ret) {
                DRM_ERROR("unreg cb fail id=%u, intr=%d, hw=%d, irq=%d ret=%d",
                          DRMID(phys_enc->parent), intr_idx, irq->hw_idx,
                          irq->irq_idx, ret);
        }

        trace_dpu_enc_irq_unregister_success(DRMID(phys_enc->parent), intr_idx,
                                             irq->hw_idx, irq->irq_idx);

        irq->irq_idx = -EINVAL;

        return 0;
}

void dpu_encoder_get_hw_resources(struct drm_encoder *drm_enc,
                                  struct dpu_encoder_hw_resources *hw_res)
{
        struct dpu_encoder_virt *dpu_enc = NULL;
        int i = 0;

        dpu_enc = to_dpu_encoder_virt(drm_enc);
        DPU_DEBUG_ENC(dpu_enc, "\n");

        /* Query resources used by phys encs, expected to be without overlap */
        memset(hw_res, 0, sizeof(*hw_res));

        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];

                if (phys && phys->ops.get_hw_resources)
                        phys->ops.get_hw_resources(phys, hw_res);
        }
}

static void dpu_encoder_destroy(struct drm_encoder *drm_enc)
{
        struct dpu_encoder_virt *dpu_enc = NULL;
        int i = 0;

        if (!drm_enc) {
                DPU_ERROR("invalid encoder\n");
                return;
        }

        dpu_enc = to_dpu_encoder_virt(drm_enc);
        DPU_DEBUG_ENC(dpu_enc, "\n");

        mutex_lock(&dpu_enc->enc_lock);

        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];

                if (phys && phys->ops.destroy) {
                        phys->ops.destroy(phys);
                        --dpu_enc->num_phys_encs;
                        dpu_enc->phys_encs[i] = NULL;
                }
        }

        if (dpu_enc->num_phys_encs)
                DPU_ERROR_ENC(dpu_enc, "expected 0 num_phys_encs not %d\n",
                                dpu_enc->num_phys_encs);
        dpu_enc->num_phys_encs = 0;
        mutex_unlock(&dpu_enc->enc_lock);

        drm_encoder_cleanup(drm_enc);
        mutex_destroy(&dpu_enc->enc_lock);
}

void dpu_encoder_helper_split_config(
                struct dpu_encoder_phys *phys_enc,
                enum dpu_intf interface)
{
        struct dpu_encoder_virt *dpu_enc;
        struct split_pipe_cfg cfg = { 0 };
        struct dpu_hw_mdp *hw_mdptop;
        struct msm_display_info *disp_info;

        if (!phys_enc || !phys_enc->hw_mdptop || !phys_enc->parent) {
                DPU_ERROR("invalid arg(s), encoder %d\n", phys_enc != 0);
                return;
        }

        dpu_enc = to_dpu_encoder_virt(phys_enc->parent);
        hw_mdptop = phys_enc->hw_mdptop;
        disp_info = &dpu_enc->disp_info;

        if (disp_info->intf_type != DRM_MODE_ENCODER_DSI)
                return;

        /**
         * disable split modes since encoder will be operating in as the only
         * encoder, either for the entire use case in the case of, for example,
         * single DSI, or for this frame in the case of left/right only partial
         * update.
         */
        if (phys_enc->split_role == ENC_ROLE_SOLO) {
                if (hw_mdptop->ops.setup_split_pipe)
                        hw_mdptop->ops.setup_split_pipe(hw_mdptop, &cfg);
                return;
        }

        cfg.en = true;
        cfg.mode = phys_enc->intf_mode;
        cfg.intf = interface;

        if (cfg.en && phys_enc->ops.needs_single_flush &&
                        phys_enc->ops.needs_single_flush(phys_enc))
                cfg.split_flush_en = true;

        if (phys_enc->split_role == ENC_ROLE_MASTER) {
                DPU_DEBUG_ENC(dpu_enc, "enable %d\n", cfg.en);

                if (hw_mdptop->ops.setup_split_pipe)
                        hw_mdptop->ops.setup_split_pipe(hw_mdptop, &cfg);
        }
}

static void _dpu_encoder_adjust_mode(struct drm_connector *connector,
                struct drm_display_mode *adj_mode)
{
        struct drm_display_mode *cur_mode;

        if (!connector || !adj_mode)
                return;

        list_for_each_entry(cur_mode, &connector->modes, head) {
                if (cur_mode->vdisplay == adj_mode->vdisplay &&
                    cur_mode->hdisplay == adj_mode->hdisplay &&
                    drm_mode_vrefresh(cur_mode) == drm_mode_vrefresh(adj_mode)) {
                        adj_mode->private = cur_mode->private;
                        adj_mode->private_flags |= cur_mode->private_flags;
                }
        }
}

static struct msm_display_topology dpu_encoder_get_topology(
                        struct dpu_encoder_virt *dpu_enc,
                        struct dpu_kms *dpu_kms,
                        struct drm_display_mode *mode)
{
        struct msm_display_topology topology;
        int i, intf_count = 0;

        for (i = 0; i < MAX_PHYS_ENCODERS_PER_VIRTUAL; i++)
                if (dpu_enc->phys_encs[i])
                        intf_count++;

        /* User split topology for width > 1080 */
        topology.num_lm = (mode->vdisplay > MAX_VDISPLAY_SPLIT) ? 2 : 1;
        topology.num_enc = 0;
        topology.num_intf = intf_count;

        return topology;
}
static int dpu_encoder_virt_atomic_check(
                struct drm_encoder *drm_enc,
                struct drm_crtc_state *crtc_state,
                struct drm_connector_state *conn_state)
{
        struct dpu_encoder_virt *dpu_enc;
        struct msm_drm_private *priv;
        struct dpu_kms *dpu_kms;
        const struct drm_display_mode *mode;
        struct drm_display_mode *adj_mode;
        struct msm_display_topology topology;
        int i = 0;
        int ret = 0;

        if (!drm_enc || !crtc_state || !conn_state) {
                DPU_ERROR("invalid arg(s), drm_enc %d, crtc/conn state %d/%d\n",
                                drm_enc != 0, crtc_state != 0, conn_state != 0);
                return -EINVAL;
        }

        dpu_enc = to_dpu_encoder_virt(drm_enc);
        DPU_DEBUG_ENC(dpu_enc, "\n");

        priv = drm_enc->dev->dev_private;
        dpu_kms = to_dpu_kms(priv->kms);
        mode = &crtc_state->mode;
        adj_mode = &crtc_state->adjusted_mode;
        trace_dpu_enc_atomic_check(DRMID(drm_enc));

        /*
         * display drivers may populate private fields of the drm display mode
         * structure while registering possible modes of a connector with DRM.
         * These private fields are not populated back while DRM invokes
         * the mode_set callbacks. This module retrieves and populates the
         * private fields of the given mode.
         */
        _dpu_encoder_adjust_mode(conn_state->connector, adj_mode);

        /* perform atomic check on the first physical encoder (master) */
        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];

                if (phys && phys->ops.atomic_check)
                        ret = phys->ops.atomic_check(phys, crtc_state,
                                        conn_state);
                else if (phys && phys->ops.mode_fixup)
                        if (!phys->ops.mode_fixup(phys, mode, adj_mode))
                                ret = -EINVAL;

                if (ret) {
                        DPU_ERROR_ENC(dpu_enc,
                                        "mode unsupported, phys idx %d\n", i);
                        break;
                }
        }

        topology = dpu_encoder_get_topology(dpu_enc, dpu_kms, adj_mode);

        /* Reserve dynamic resources now. Indicating AtomicTest phase */
        if (!ret) {
                /*
                 * Avoid reserving resources when mode set is pending. Topology
                 * info may not be available to complete reservation.
                 */
                if (drm_atomic_crtc_needs_modeset(crtc_state)
                                && dpu_enc->mode_set_complete) {
                        ret = dpu_rm_reserve(&dpu_kms->rm, drm_enc, crtc_state,
                                             topology, true);
                        dpu_enc->mode_set_complete = false;
                }
        }

        trace_dpu_enc_atomic_check_flags(DRMID(drm_enc), adj_mode->flags,
                        adj_mode->private_flags);

        return ret;
}

static void _dpu_encoder_update_vsync_source(struct dpu_encoder_virt *dpu_enc,
                        struct msm_display_info *disp_info)
{
        struct dpu_vsync_source_cfg vsync_cfg = { 0 };
        struct msm_drm_private *priv;
        struct dpu_kms *dpu_kms;
        struct dpu_hw_mdp *hw_mdptop;
        struct drm_encoder *drm_enc;
        int i;

        if (!dpu_enc || !disp_info) {
                DPU_ERROR("invalid param dpu_enc:%d or disp_info:%d\n",
                                        dpu_enc != NULL, disp_info != NULL);
                return;
        } else if (dpu_enc->num_phys_encs > ARRAY_SIZE(dpu_enc->hw_pp)) {
                DPU_ERROR("invalid num phys enc %d/%d\n",
                                dpu_enc->num_phys_encs,
                                (int) ARRAY_SIZE(dpu_enc->hw_pp));
                return;
        }

        drm_enc = &dpu_enc->base;
        /* this pointers are checked in virt_enable_helper */
        priv = drm_enc->dev->dev_private;

        dpu_kms = to_dpu_kms(priv->kms);
        if (!dpu_kms) {
                DPU_ERROR("invalid dpu_kms\n");
                return;
        }

        hw_mdptop = dpu_kms->hw_mdp;
        if (!hw_mdptop) {
                DPU_ERROR("invalid mdptop\n");
                return;
        }

        if (hw_mdptop->ops.setup_vsync_source &&
                        disp_info->capabilities & MSM_DISPLAY_CAP_CMD_MODE) {
                for (i = 0; i < dpu_enc->num_phys_encs; i++)
                        vsync_cfg.ppnumber[i] = dpu_enc->hw_pp[i]->idx;

                vsync_cfg.pp_count = dpu_enc->num_phys_encs;
                if (disp_info->is_te_using_watchdog_timer)
                        vsync_cfg.vsync_source = DPU_VSYNC_SOURCE_WD_TIMER_0;
                else
                        vsync_cfg.vsync_source = DPU_VSYNC0_SOURCE_GPIO;

                hw_mdptop->ops.setup_vsync_source(hw_mdptop, &vsync_cfg);
        }
}

static void _dpu_encoder_irq_control(struct drm_encoder *drm_enc, bool enable)
{
        struct dpu_encoder_virt *dpu_enc;
        int i;

        if (!drm_enc) {
                DPU_ERROR("invalid encoder\n");
                return;
        }

        dpu_enc = to_dpu_encoder_virt(drm_enc);

        DPU_DEBUG_ENC(dpu_enc, "enable:%d\n", enable);
        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];

                if (phys && phys->ops.irq_control)
                        phys->ops.irq_control(phys, enable);
        }

}

static void _dpu_encoder_resource_control_helper(struct drm_encoder *drm_enc,
                bool enable)
{
        struct msm_drm_private *priv;
        struct dpu_kms *dpu_kms;
        struct dpu_encoder_virt *dpu_enc;

        dpu_enc = to_dpu_encoder_virt(drm_enc);
        priv = drm_enc->dev->dev_private;
        dpu_kms = to_dpu_kms(priv->kms);

        trace_dpu_enc_rc_helper(DRMID(drm_enc), enable);

        if (!dpu_enc->cur_master) {
                DPU_ERROR("encoder master not set\n");
                return;
        }

        if (enable) {
                /* enable DPU core clks */
                pm_runtime_get_sync(&dpu_kms->pdev->dev);

                /* enable all the irq */
                _dpu_encoder_irq_control(drm_enc, true);

        } else {
                /* disable all the irq */
                _dpu_encoder_irq_control(drm_enc, false);

                /* disable DPU core clks */
                pm_runtime_put_sync(&dpu_kms->pdev->dev);
        }

}

static int dpu_encoder_resource_control(struct drm_encoder *drm_enc,
                u32 sw_event)
{
        struct dpu_encoder_virt *dpu_enc;
        struct msm_drm_private *priv;
        bool is_vid_mode = false;

        if (!drm_enc || !drm_enc->dev || !drm_enc->dev->dev_private ||
                        !drm_enc->crtc) {
                DPU_ERROR("invalid parameters\n");
                return -EINVAL;
        }
        dpu_enc = to_dpu_encoder_virt(drm_enc);
        priv = drm_enc->dev->dev_private;
        is_vid_mode = dpu_enc->disp_info.capabilities &
                                                MSM_DISPLAY_CAP_VID_MODE;

        /*
         * when idle_pc is not supported, process only KICKOFF, STOP and MODESET
         * events and return early for other events (ie wb display).
         */
        if (!dpu_enc->idle_pc_supported &&
                        (sw_event != DPU_ENC_RC_EVENT_KICKOFF &&
                        sw_event != DPU_ENC_RC_EVENT_STOP &&
                        sw_event != DPU_ENC_RC_EVENT_PRE_STOP))
                return 0;

        trace_dpu_enc_rc(DRMID(drm_enc), sw_event, dpu_enc->idle_pc_supported,
                         dpu_enc->rc_state, "begin");

        switch (sw_event) {
        case DPU_ENC_RC_EVENT_KICKOFF:
                /* cancel delayed off work, if any */
                if (cancel_delayed_work_sync(&dpu_enc->delayed_off_work))
                        DPU_DEBUG_ENC(dpu_enc, "sw_event:%d, work cancelled\n",
                                        sw_event);

                mutex_lock(&dpu_enc->rc_lock);

                /* return if the resource control is already in ON state */
                if (dpu_enc->rc_state == DPU_ENC_RC_STATE_ON) {
                        DRM_DEBUG_KMS("id;%u, sw_event:%d, rc in ON state\n",
                                      DRMID(drm_enc), sw_event);
                        mutex_unlock(&dpu_enc->rc_lock);
                        return 0;
                } else if (dpu_enc->rc_state != DPU_ENC_RC_STATE_OFF &&
                                dpu_enc->rc_state != DPU_ENC_RC_STATE_IDLE) {
                        DRM_DEBUG_KMS("id;%u, sw_event:%d, rc in state %d\n",
                                      DRMID(drm_enc), sw_event,
                                      dpu_enc->rc_state);
                        mutex_unlock(&dpu_enc->rc_lock);
                        return -EINVAL;
                }

                if (is_vid_mode && dpu_enc->rc_state == DPU_ENC_RC_STATE_IDLE)
                        _dpu_encoder_irq_control(drm_enc, true);
                else
                        _dpu_encoder_resource_control_helper(drm_enc, true);

                dpu_enc->rc_state = DPU_ENC_RC_STATE_ON;

                trace_dpu_enc_rc(DRMID(drm_enc), sw_event,
                                 dpu_enc->idle_pc_supported, dpu_enc->rc_state,
                                 "kickoff");

                mutex_unlock(&dpu_enc->rc_lock);
                break;

        case DPU_ENC_RC_EVENT_FRAME_DONE:
                /*
                 * mutex lock is not used as this event happens at interrupt
                 * context. And locking is not required as, the other events
                 * like KICKOFF and STOP does a wait-for-idle before executing
                 * the resource_control
                 */
                if (dpu_enc->rc_state != DPU_ENC_RC_STATE_ON) {
                        DRM_DEBUG_KMS("id:%d, sw_event:%d,rc:%d-unexpected\n",
                                      DRMID(drm_enc), sw_event,
                                      dpu_enc->rc_state);
                        return -EINVAL;
                }

                /*
                 * schedule off work item only when there are no
                 * frames pending
                 */
                if (dpu_crtc_frame_pending(drm_enc->crtc) > 1) {
                        DRM_DEBUG_KMS("id:%d skip schedule work\n",
                                      DRMID(drm_enc));
                        return 0;
                }

                queue_delayed_work(priv->wq, &dpu_enc->delayed_off_work,
                                   msecs_to_jiffies(dpu_enc->idle_timeout));

                trace_dpu_enc_rc(DRMID(drm_enc), sw_event,
                                 dpu_enc->idle_pc_supported, dpu_enc->rc_state,
                                 "frame done");
                break;

        case DPU_ENC_RC_EVENT_PRE_STOP:
                /* cancel delayed off work, if any */
                if (cancel_delayed_work_sync(&dpu_enc->delayed_off_work))
                        DPU_DEBUG_ENC(dpu_enc, "sw_event:%d, work cancelled\n",
                                        sw_event);

                mutex_lock(&dpu_enc->rc_lock);

                if (is_vid_mode &&
                          dpu_enc->rc_state == DPU_ENC_RC_STATE_IDLE) {
                        _dpu_encoder_irq_control(drm_enc, true);
                }
                /* skip if is already OFF or IDLE, resources are off already */
                else if (dpu_enc->rc_state == DPU_ENC_RC_STATE_OFF ||
                                dpu_enc->rc_state == DPU_ENC_RC_STATE_IDLE) {
                        DRM_DEBUG_KMS("id:%u, sw_event:%d, rc in %d state\n",
                                      DRMID(drm_enc), sw_event,
                                      dpu_enc->rc_state);
                        mutex_unlock(&dpu_enc->rc_lock);
                        return 0;
                }

                dpu_enc->rc_state = DPU_ENC_RC_STATE_PRE_OFF;

                trace_dpu_enc_rc(DRMID(drm_enc), sw_event,
                                 dpu_enc->idle_pc_supported, dpu_enc->rc_state,
                                 "pre stop");

                mutex_unlock(&dpu_enc->rc_lock);
                break;

        case DPU_ENC_RC_EVENT_STOP:
                mutex_lock(&dpu_enc->rc_lock);

                /* return if the resource control is already in OFF state */
                if (dpu_enc->rc_state == DPU_ENC_RC_STATE_OFF) {
                        DRM_DEBUG_KMS("id: %u, sw_event:%d, rc in OFF state\n",
                                      DRMID(drm_enc), sw_event);
                        mutex_unlock(&dpu_enc->rc_lock);
                        return 0;
                } else if (dpu_enc->rc_state == DPU_ENC_RC_STATE_ON) {
                        DRM_ERROR("id: %u, sw_event:%d, rc in state %d\n",
                                  DRMID(drm_enc), sw_event, dpu_enc->rc_state);
                        mutex_unlock(&dpu_enc->rc_lock);
                        return -EINVAL;
                }

                /**
                 * expect to arrive here only if in either idle state or pre-off
                 * and in IDLE state the resources are already disabled
                 */
                if (dpu_enc->rc_state == DPU_ENC_RC_STATE_PRE_OFF)
                        _dpu_encoder_resource_control_helper(drm_enc, false);

                dpu_enc->rc_state = DPU_ENC_RC_STATE_OFF;

                trace_dpu_enc_rc(DRMID(drm_enc), sw_event,
                                 dpu_enc->idle_pc_supported, dpu_enc->rc_state,
                                 "stop");

                mutex_unlock(&dpu_enc->rc_lock);
                break;

        case DPU_ENC_RC_EVENT_ENTER_IDLE:
                mutex_lock(&dpu_enc->rc_lock);

                if (dpu_enc->rc_state != DPU_ENC_RC_STATE_ON) {
                        DRM_ERROR("id: %u, sw_event:%d, rc:%d !ON state\n",
                                  DRMID(drm_enc), sw_event, dpu_enc->rc_state);
                        mutex_unlock(&dpu_enc->rc_lock);
                        return 0;
                }

                /*
                 * if we are in ON but a frame was just kicked off,
                 * ignore the IDLE event, it's probably a stale timer event
                 */
                if (dpu_enc->frame_busy_mask[0]) {
                        DRM_ERROR("id:%u, sw_event:%d, rc:%d frame pending\n",
                                  DRMID(drm_enc), sw_event, dpu_enc->rc_state);
                        mutex_unlock(&dpu_enc->rc_lock);
                        return 0;
                }

                if (is_vid_mode)
                        _dpu_encoder_irq_control(drm_enc, false);
                else
                        _dpu_encoder_resource_control_helper(drm_enc, false);

                dpu_enc->rc_state = DPU_ENC_RC_STATE_IDLE;

                trace_dpu_enc_rc(DRMID(drm_enc), sw_event,
                                 dpu_enc->idle_pc_supported, dpu_enc->rc_state,
                                 "idle");

                mutex_unlock(&dpu_enc->rc_lock);
                break;

        default:
                DRM_ERROR("id:%u, unexpected sw_event: %d\n", DRMID(drm_enc),
                          sw_event);
                trace_dpu_enc_rc(DRMID(drm_enc), sw_event,
                                 dpu_enc->idle_pc_supported, dpu_enc->rc_state,
                                 "error");
                break;
        }

        trace_dpu_enc_rc(DRMID(drm_enc), sw_event,
                         dpu_enc->idle_pc_supported, dpu_enc->rc_state,
                         "end");
        return 0;
}

static void dpu_encoder_virt_mode_set(struct drm_encoder *drm_enc,
                                      struct drm_display_mode *mode,
                                      struct drm_display_mode *adj_mode)
{
        struct dpu_encoder_virt *dpu_enc;
        struct msm_drm_private *priv;
        struct dpu_kms *dpu_kms;
        struct list_head *connector_list;
        struct drm_connector *conn = NULL, *conn_iter;
        struct drm_crtc *drm_crtc;
        struct dpu_crtc_state *cstate;
        struct dpu_rm_hw_iter hw_iter;
        struct msm_display_topology topology;
        struct dpu_hw_ctl *hw_ctl[MAX_CHANNELS_PER_ENC] = { NULL };
        struct dpu_hw_mixer *hw_lm[MAX_CHANNELS_PER_ENC] = { NULL };
        int num_lm = 0, num_ctl = 0;
        int i, j, ret;

        if (!drm_enc) {
                DPU_ERROR("invalid encoder\n");
                return;
        }

        dpu_enc = to_dpu_encoder_virt(drm_enc);
        DPU_DEBUG_ENC(dpu_enc, "\n");

        priv = drm_enc->dev->dev_private;
        dpu_kms = to_dpu_kms(priv->kms);
        connector_list = &dpu_kms->dev->mode_config.connector_list;

        trace_dpu_enc_mode_set(DRMID(drm_enc));

        list_for_each_entry(conn_iter, connector_list, head)
                if (conn_iter->encoder == drm_enc)
                        conn = conn_iter;

        if (!conn) {
                DPU_ERROR_ENC(dpu_enc, "failed to find attached connector\n");
                return;
        } else if (!conn->state) {
                DPU_ERROR_ENC(dpu_enc, "invalid connector state\n");
                return;
        }

        drm_for_each_crtc(drm_crtc, drm_enc->dev)
                if (drm_crtc->state->encoder_mask & drm_encoder_mask(drm_enc))
                        break;

        topology = dpu_encoder_get_topology(dpu_enc, dpu_kms, adj_mode);

        /* Reserve dynamic resources now. Indicating non-AtomicTest phase */
        ret = dpu_rm_reserve(&dpu_kms->rm, drm_enc, drm_crtc->state,
                             topology, false);
        if (ret) {
                DPU_ERROR_ENC(dpu_enc,
                                "failed to reserve hw resources, %d\n", ret);
                return;
        }

        dpu_rm_init_hw_iter(&hw_iter, drm_enc->base.id, DPU_HW_BLK_PINGPONG);
        for (i = 0; i < MAX_CHANNELS_PER_ENC; i++) {
                dpu_enc->hw_pp[i] = NULL;
                if (!dpu_rm_get_hw(&dpu_kms->rm, &hw_iter))
                        break;
                dpu_enc->hw_pp[i] = (struct dpu_hw_pingpong *) hw_iter.hw;
        }

        dpu_rm_init_hw_iter(&hw_iter, drm_enc->base.id, DPU_HW_BLK_CTL);
        for (i = 0; i < MAX_CHANNELS_PER_ENC; i++) {
                if (!dpu_rm_get_hw(&dpu_kms->rm, &hw_iter))
                        break;
                hw_ctl[i] = (struct dpu_hw_ctl *)hw_iter.hw;
                num_ctl++;
        }

        dpu_rm_init_hw_iter(&hw_iter, drm_enc->base.id, DPU_HW_BLK_LM);
        for (i = 0; i < MAX_CHANNELS_PER_ENC; i++) {
                if (!dpu_rm_get_hw(&dpu_kms->rm, &hw_iter))
                        break;
                hw_lm[i] = (struct dpu_hw_mixer *)hw_iter.hw;
                num_lm++;
        }

        cstate = to_dpu_crtc_state(drm_crtc->state);

        for (i = 0; i < num_lm; i++) {
                int ctl_idx = (i < num_ctl) ? i : (num_ctl-1);

                cstate->mixers[i].hw_lm = hw_lm[i];
                cstate->mixers[i].lm_ctl = hw_ctl[ctl_idx];
        }

        cstate->num_mixers = num_lm;

        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];

                if (phys) {
                        if (!dpu_enc->hw_pp[i]) {
                                DPU_ERROR_ENC(dpu_enc, "no pp block assigned"
                                             "at idx: %d\n", i);
                                goto error;
                        }

                        if (!hw_ctl[i]) {
                                DPU_ERROR_ENC(dpu_enc, "no ctl block assigned"
                                             "at idx: %d\n", i);
                                goto error;
                        }

                        phys->hw_pp = dpu_enc->hw_pp[i];
                        phys->hw_ctl = hw_ctl[i];

                        dpu_rm_init_hw_iter(&hw_iter, drm_enc->base.id,
                                            DPU_HW_BLK_INTF);
                        for (j = 0; j < MAX_CHANNELS_PER_ENC; j++) {
                                struct dpu_hw_intf *hw_intf;

                                if (!dpu_rm_get_hw(&dpu_kms->rm, &hw_iter))
                                        break;

                                hw_intf = (struct dpu_hw_intf *)hw_iter.hw;
                                if (hw_intf->idx == phys->intf_idx)
                                        phys->hw_intf = hw_intf;
                        }

                        if (!phys->hw_intf) {
                                DPU_ERROR_ENC(dpu_enc,
                                              "no intf block assigned at idx: %d\n",
                                              i);
                                goto error;
                        }

                        phys->connector = conn->state->connector;
                        if (phys->ops.mode_set)
                                phys->ops.mode_set(phys, mode, adj_mode);
                }
        }

        dpu_enc->mode_set_complete = true;

error:
        dpu_rm_release(&dpu_kms->rm, drm_enc);
}

static void _dpu_encoder_virt_enable_helper(struct drm_encoder *drm_enc)
{
        struct dpu_encoder_virt *dpu_enc = NULL;
        struct msm_drm_private *priv;
        struct dpu_kms *dpu_kms;

        if (!drm_enc || !drm_enc->dev || !drm_enc->dev->dev_private) {
                DPU_ERROR("invalid parameters\n");
                return;
        }

        priv = drm_enc->dev->dev_private;
        dpu_kms = to_dpu_kms(priv->kms);
        if (!dpu_kms) {
                DPU_ERROR("invalid dpu_kms\n");
                return;
        }

        dpu_enc = to_dpu_encoder_virt(drm_enc);
        if (!dpu_enc || !dpu_enc->cur_master) {
                DPU_ERROR("invalid dpu encoder/master\n");
                return;
        }

        if (dpu_enc->cur_master->hw_mdptop &&
                        dpu_enc->cur_master->hw_mdptop->ops.reset_ubwc)
                dpu_enc->cur_master->hw_mdptop->ops.reset_ubwc(
                                dpu_enc->cur_master->hw_mdptop,
                                dpu_kms->catalog);

        _dpu_encoder_update_vsync_source(dpu_enc, &dpu_enc->disp_info);
}

void dpu_encoder_virt_runtime_resume(struct drm_encoder *drm_enc)
{
        struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);

        mutex_lock(&dpu_enc->enc_lock);

        if (!dpu_enc->enabled)
                goto out;

        if (dpu_enc->cur_slave && dpu_enc->cur_slave->ops.restore)
                dpu_enc->cur_slave->ops.restore(dpu_enc->cur_slave);
        if (dpu_enc->cur_master && dpu_enc->cur_master->ops.restore)
                dpu_enc->cur_master->ops.restore(dpu_enc->cur_master);

        _dpu_encoder_virt_enable_helper(drm_enc);

out:
        mutex_unlock(&dpu_enc->enc_lock);
}

static void dpu_encoder_virt_enable(struct drm_encoder *drm_enc)
{
        struct dpu_encoder_virt *dpu_enc = NULL;
        int ret = 0;
        struct drm_display_mode *cur_mode = NULL;

        if (!drm_enc) {
                DPU_ERROR("invalid encoder\n");
                return;
        }
        dpu_enc = to_dpu_encoder_virt(drm_enc);

        mutex_lock(&dpu_enc->enc_lock);
        cur_mode = &dpu_enc->base.crtc->state->adjusted_mode;

        trace_dpu_enc_enable(DRMID(drm_enc), cur_mode->hdisplay,
                             cur_mode->vdisplay);

        /* always enable slave encoder before master */
        if (dpu_enc->cur_slave && dpu_enc->cur_slave->ops.enable)
                dpu_enc->cur_slave->ops.enable(dpu_enc->cur_slave);

        if (dpu_enc->cur_master && dpu_enc->cur_master->ops.enable)
                dpu_enc->cur_master->ops.enable(dpu_enc->cur_master);

        ret = dpu_encoder_resource_control(drm_enc, DPU_ENC_RC_EVENT_KICKOFF);
        if (ret) {
                DPU_ERROR_ENC(dpu_enc, "dpu resource control failed: %d\n",
                                ret);
                goto out;
        }

        _dpu_encoder_virt_enable_helper(drm_enc);

        dpu_enc->enabled = true;

out:
        mutex_unlock(&dpu_enc->enc_lock);
}

static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
{
        struct dpu_encoder_virt *dpu_enc = NULL;
        struct msm_drm_private *priv;
        struct dpu_kms *dpu_kms;
        struct drm_display_mode *mode;
        int i = 0;

        if (!drm_enc) {
                DPU_ERROR("invalid encoder\n");
                return;
        } else if (!drm_enc->dev) {
                DPU_ERROR("invalid dev\n");
                return;
        } else if (!drm_enc->dev->dev_private) {
                DPU_ERROR("invalid dev_private\n");
                return;
        }

        dpu_enc = to_dpu_encoder_virt(drm_enc);
        DPU_DEBUG_ENC(dpu_enc, "\n");

        mutex_lock(&dpu_enc->enc_lock);
        dpu_enc->enabled = false;

        mode = &drm_enc->crtc->state->adjusted_mode;

        priv = drm_enc->dev->dev_private;
        dpu_kms = to_dpu_kms(priv->kms);

        trace_dpu_enc_disable(DRMID(drm_enc));

        /* wait for idle */
        dpu_encoder_wait_for_event(drm_enc, MSM_ENC_TX_COMPLETE);

        dpu_encoder_resource_control(drm_enc, DPU_ENC_RC_EVENT_PRE_STOP);

        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];

                if (phys && phys->ops.disable)
                        phys->ops.disable(phys);
        }

        /* after phys waits for frame-done, should be no more frames pending */
        if (atomic_xchg(&dpu_enc->frame_done_timeout_ms, 0)) {
                DPU_ERROR("enc%d timeout pending\n", drm_enc->base.id);
                del_timer_sync(&dpu_enc->frame_done_timer);
        }

        dpu_encoder_resource_control(drm_enc, DPU_ENC_RC_EVENT_STOP);

        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                if (dpu_enc->phys_encs[i])
                        dpu_enc->phys_encs[i]->connector = NULL;
        }

        DPU_DEBUG_ENC(dpu_enc, "encoder disabled\n");

        dpu_rm_release(&dpu_kms->rm, drm_enc);

        mutex_unlock(&dpu_enc->enc_lock);
}

static enum dpu_intf dpu_encoder_get_intf(struct dpu_mdss_cfg *catalog,
                enum dpu_intf_type type, u32 controller_id)
{
        int i = 0;

        for (i = 0; i < catalog->intf_count; i++) {
                if (catalog->intf[i].type == type
                    && catalog->intf[i].controller_id == controller_id) {
                        return catalog->intf[i].id;
                }
        }

        return INTF_MAX;
}

static void dpu_encoder_vblank_callback(struct drm_encoder *drm_enc,
                struct dpu_encoder_phys *phy_enc)
{
        struct dpu_encoder_virt *dpu_enc = NULL;
        unsigned long lock_flags;

        if (!drm_enc || !phy_enc)
                return;

        DPU_ATRACE_BEGIN("encoder_vblank_callback");
        dpu_enc = to_dpu_encoder_virt(drm_enc);

        spin_lock_irqsave(&dpu_enc->enc_spinlock, lock_flags);
        if (dpu_enc->crtc)
                dpu_crtc_vblank_callback(dpu_enc->crtc);
        spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);

        atomic_inc(&phy_enc->vsync_cnt);
        DPU_ATRACE_END("encoder_vblank_callback");
}

static void dpu_encoder_underrun_callback(struct drm_encoder *drm_enc,
                struct dpu_encoder_phys *phy_enc)
{
        if (!phy_enc)
                return;

        DPU_ATRACE_BEGIN("encoder_underrun_callback");
        atomic_inc(&phy_enc->underrun_cnt);
        trace_dpu_enc_underrun_cb(DRMID(drm_enc),
                                  atomic_read(&phy_enc->underrun_cnt));
        DPU_ATRACE_END("encoder_underrun_callback");
}

void dpu_encoder_assign_crtc(struct drm_encoder *drm_enc, struct drm_crtc *crtc)
{
        struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
        unsigned long lock_flags;

        spin_lock_irqsave(&dpu_enc->enc_spinlock, lock_flags);
        /* crtc should always be cleared before re-assigning */
        WARN_ON(crtc && dpu_enc->crtc);
        dpu_enc->crtc = crtc;
        spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
}

void dpu_encoder_toggle_vblank_for_crtc(struct drm_encoder *drm_enc,
                                        struct drm_crtc *crtc, bool enable)
{
        struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
        unsigned long lock_flags;
        int i;

        trace_dpu_enc_vblank_cb(DRMID(drm_enc), enable);

        spin_lock_irqsave(&dpu_enc->enc_spinlock, lock_flags);
        if (dpu_enc->crtc != crtc) {
                spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
                return;
        }
        spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);

        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];

                if (phys && phys->ops.control_vblank_irq)
                        phys->ops.control_vblank_irq(phys, enable);
        }
}

void dpu_encoder_register_frame_event_callback(struct drm_encoder *drm_enc,
                void (*frame_event_cb)(void *, u32 event),
                void *frame_event_cb_data)
{
        struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
        unsigned long lock_flags;
        bool enable;

        enable = frame_event_cb ? true : false;

        if (!drm_enc) {
                DPU_ERROR("invalid encoder\n");
                return;
        }
        trace_dpu_enc_frame_event_cb(DRMID(drm_enc), enable);

        spin_lock_irqsave(&dpu_enc->enc_spinlock, lock_flags);
        dpu_enc->crtc_frame_event_cb = frame_event_cb;
        dpu_enc->crtc_frame_event_cb_data = frame_event_cb_data;
        spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
}

static void dpu_encoder_frame_done_callback(
                struct drm_encoder *drm_enc,
                struct dpu_encoder_phys *ready_phys, u32 event)
{
        struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
        unsigned int i;

        if (event & (DPU_ENCODER_FRAME_EVENT_DONE
                        | DPU_ENCODER_FRAME_EVENT_ERROR
                        | DPU_ENCODER_FRAME_EVENT_PANEL_DEAD)) {

                if (!dpu_enc->frame_busy_mask[0]) {
                        /**
                         * suppress frame_done without waiter,
                         * likely autorefresh
                         */
                        trace_dpu_enc_frame_done_cb_not_busy(DRMID(drm_enc),
                                        event, ready_phys->intf_idx);
                        return;
                }

                /* One of the physical encoders has become idle */
                for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                        if (dpu_enc->phys_encs[i] == ready_phys) {
                                trace_dpu_enc_frame_done_cb(DRMID(drm_enc), i,
                                                dpu_enc->frame_busy_mask[0]);
                                clear_bit(i, dpu_enc->frame_busy_mask);
                        }
                }

                if (!dpu_enc->frame_busy_mask[0]) {
                        atomic_set(&dpu_enc->frame_done_timeout_ms, 0);
                        del_timer(&dpu_enc->frame_done_timer);

                        dpu_encoder_resource_control(drm_enc,
                                        DPU_ENC_RC_EVENT_FRAME_DONE);

                        if (dpu_enc->crtc_frame_event_cb)
                                dpu_enc->crtc_frame_event_cb(
                                        dpu_enc->crtc_frame_event_cb_data,
                                        event);
                }
        } else {
                if (dpu_enc->crtc_frame_event_cb)
                        dpu_enc->crtc_frame_event_cb(
                                dpu_enc->crtc_frame_event_cb_data, event);
        }
}

static void dpu_encoder_off_work(struct work_struct *work)
{
        struct dpu_encoder_virt *dpu_enc = container_of(work,
                        struct dpu_encoder_virt, delayed_off_work.work);

        if (!dpu_enc) {
                DPU_ERROR("invalid dpu encoder\n");
                return;
        }

        dpu_encoder_resource_control(&dpu_enc->base,
                                                DPU_ENC_RC_EVENT_ENTER_IDLE);

        dpu_encoder_frame_done_callback(&dpu_enc->base, NULL,
                                DPU_ENCODER_FRAME_EVENT_IDLE);
}

/**
 * _dpu_encoder_trigger_flush - trigger flush for a physical encoder
 * drm_enc: Pointer to drm encoder structure
 * phys: Pointer to physical encoder structure
 * extra_flush_bits: Additional bit mask to include in flush trigger
 */
static void _dpu_encoder_trigger_flush(struct drm_encoder *drm_enc,
                struct dpu_encoder_phys *phys, uint32_t extra_flush_bits,
                bool async)
{
        struct dpu_hw_ctl *ctl;
        int pending_kickoff_cnt;
        u32 ret = UINT_MAX;

        if (!drm_enc || !phys) {
                DPU_ERROR("invalid argument(s), drm_enc %d, phys_enc %d\n",
                                drm_enc != 0, phys != 0);
                return;
        }

        if (!phys->hw_pp) {
                DPU_ERROR("invalid pingpong hw\n");
                return;
        }

        ctl = phys->hw_ctl;
        if (!ctl || !ctl->ops.trigger_flush) {
                DPU_ERROR("missing trigger cb\n");
                return;
        }

        if (!async)
                pending_kickoff_cnt = dpu_encoder_phys_inc_pending(phys);
        else
                pending_kickoff_cnt = atomic_read(&phys->pending_kickoff_cnt);

        if (extra_flush_bits && ctl->ops.update_pending_flush)
                ctl->ops.update_pending_flush(ctl, extra_flush_bits);

        ctl->ops.trigger_flush(ctl);

        if (ctl->ops.get_pending_flush)
                ret = ctl->ops.get_pending_flush(ctl);

        trace_dpu_enc_trigger_flush(DRMID(drm_enc), phys->intf_idx,
                                    pending_kickoff_cnt, ctl->idx,
                                    extra_flush_bits, ret);
}

/**
 * _dpu_encoder_trigger_start - trigger start for a physical encoder
 * phys: Pointer to physical encoder structure
 */
static void _dpu_encoder_trigger_start(struct dpu_encoder_phys *phys)
{
        if (!phys) {
                DPU_ERROR("invalid argument(s)\n");
                return;
        }

        if (!phys->hw_pp) {
                DPU_ERROR("invalid pingpong hw\n");
                return;
        }

        if (phys->ops.trigger_start && phys->enable_state != DPU_ENC_DISABLED)
                phys->ops.trigger_start(phys);
}

void dpu_encoder_helper_trigger_start(struct dpu_encoder_phys *phys_enc)
{
        struct dpu_hw_ctl *ctl;

        if (!phys_enc) {
                DPU_ERROR("invalid encoder\n");
                return;
        }

        ctl = phys_enc->hw_ctl;
        if (ctl && ctl->ops.trigger_start) {
                ctl->ops.trigger_start(ctl);
                trace_dpu_enc_trigger_start(DRMID(phys_enc->parent), ctl->idx);
        }
}

static int dpu_encoder_helper_wait_event_timeout(
                int32_t drm_id,
                int32_t hw_id,
                struct dpu_encoder_wait_info *info)
{
        int rc = 0;
        s64 expected_time = ktime_to_ms(ktime_get()) + info->timeout_ms;
        s64 jiffies = msecs_to_jiffies(info->timeout_ms);
        s64 time;

        do {
                rc = wait_event_timeout(*(info->wq),
                                atomic_read(info->atomic_cnt) == 0, jiffies);
                time = ktime_to_ms(ktime_get());

                trace_dpu_enc_wait_event_timeout(drm_id, hw_id, rc, time,
                                                 expected_time,
                                                 atomic_read(info->atomic_cnt));
        /* If we timed out, counter is valid and time is less, wait again */
        } while (atomic_read(info->atomic_cnt) && (rc == 0) &&
                        (time < expected_time));

        return rc;
}

static void dpu_encoder_helper_hw_reset(struct dpu_encoder_phys *phys_enc)
{
        struct dpu_encoder_virt *dpu_enc;
        struct dpu_hw_ctl *ctl;
        int rc;

        if (!phys_enc) {
                DPU_ERROR("invalid encoder\n");
                return;
        }
        dpu_enc = to_dpu_encoder_virt(phys_enc->parent);
        ctl = phys_enc->hw_ctl;

        if (!ctl || !ctl->ops.reset)
                return;

        DRM_DEBUG_KMS("id:%u ctl %d reset\n", DRMID(phys_enc->parent),
                      ctl->idx);

        rc = ctl->ops.reset(ctl);
        if (rc)
                DPU_ERROR_ENC(dpu_enc, "ctl %d reset failure\n",  ctl->idx);

        phys_enc->enable_state = DPU_ENC_ENABLED;
}

/**
 * _dpu_encoder_kickoff_phys - handle physical encoder kickoff
 *      Iterate through the physical encoders and perform consolidated flush
 *      and/or control start triggering as needed. This is done in the virtual
 *      encoder rather than the individual physical ones in order to handle
 *      use cases that require visibility into multiple physical encoders at
 *      a time.
 * dpu_enc: Pointer to virtual encoder structure
 */
static void _dpu_encoder_kickoff_phys(struct dpu_encoder_virt *dpu_enc,
                                      bool async)
{
        struct dpu_hw_ctl *ctl;
        uint32_t i, pending_flush;
        unsigned long lock_flags;

        if (!dpu_enc) {
                DPU_ERROR("invalid encoder\n");
                return;
        }

        pending_flush = 0x0;

        /* update pending counts and trigger kickoff ctl flush atomically */
        spin_lock_irqsave(&dpu_enc->enc_spinlock, lock_flags);

        /* don't perform flush/start operations for slave encoders */
        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];

                if (!phys || phys->enable_state == DPU_ENC_DISABLED)
                        continue;

                ctl = phys->hw_ctl;
                if (!ctl)
                        continue;

                /*
                 * This is cleared in frame_done worker, which isn't invoked
                 * for async commits. So don't set this for async, since it'll
                 * roll over to the next commit.
                 */
                if (!async && phys->split_role != ENC_ROLE_SLAVE)
                        set_bit(i, dpu_enc->frame_busy_mask);

                if (!phys->ops.needs_single_flush ||
                                !phys->ops.needs_single_flush(phys))
                        _dpu_encoder_trigger_flush(&dpu_enc->base, phys, 0x0,
                                                   async);
                else if (ctl->ops.get_pending_flush)
                        pending_flush |= ctl->ops.get_pending_flush(ctl);
        }

        /* for split flush, combine pending flush masks and send to master */
        if (pending_flush && dpu_enc->cur_master) {
                _dpu_encoder_trigger_flush(
                                &dpu_enc->base,
                                dpu_enc->cur_master,
                                pending_flush, async);
        }

        _dpu_encoder_trigger_start(dpu_enc->cur_master);

        spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
}

void dpu_encoder_trigger_kickoff_pending(struct drm_encoder *drm_enc)
{
        struct dpu_encoder_virt *dpu_enc;
        struct dpu_encoder_phys *phys;
        unsigned int i;
        struct dpu_hw_ctl *ctl;
        struct msm_display_info *disp_info;

        if (!drm_enc) {
                DPU_ERROR("invalid encoder\n");
                return;
        }
        dpu_enc = to_dpu_encoder_virt(drm_enc);
        disp_info = &dpu_enc->disp_info;

        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                phys = dpu_enc->phys_encs[i];

                if (phys && phys->hw_ctl) {
                        ctl = phys->hw_ctl;
                        if (ctl->ops.clear_pending_flush)
                                ctl->ops.clear_pending_flush(ctl);

                        /* update only for command mode primary ctl */
                        if ((phys == dpu_enc->cur_master) &&
                           (disp_info->capabilities & MSM_DISPLAY_CAP_CMD_MODE)
                            && ctl->ops.trigger_pending)
                                ctl->ops.trigger_pending(ctl);
                }
        }
}

static u32 _dpu_encoder_calculate_linetime(struct dpu_encoder_virt *dpu_enc,
                struct drm_display_mode *mode)
{
        u64 pclk_rate;
        u32 pclk_period;
        u32 line_time;

        /*
         * For linetime calculation, only operate on master encoder.
         */
        if (!dpu_enc->cur_master)
                return 0;

        if (!dpu_enc->cur_master->ops.get_line_count) {
                DPU_ERROR("get_line_count function not defined\n");
                return 0;
        }

        pclk_rate = mode->clock; /* pixel clock in kHz */
        if (pclk_rate == 0) {
                DPU_ERROR("pclk is 0, cannot calculate line time\n");
                return 0;
        }

        pclk_period = DIV_ROUND_UP_ULL(1000000000ull, pclk_rate);
        if (pclk_period == 0) {
                DPU_ERROR("pclk period is 0\n");
                return 0;
        }

        /*
         * Line time calculation based on Pixel clock and HTOTAL.
         * Final unit is in ns.
         */
        line_time = (pclk_period * mode->htotal) / 1000;
        if (line_time == 0) {
                DPU_ERROR("line time calculation is 0\n");
                return 0;
        }

        DPU_DEBUG_ENC(dpu_enc,
                        "clk_rate=%lldkHz, clk_period=%d, linetime=%dns\n",
                        pclk_rate, pclk_period, line_time);

        return line_time;
}

static int _dpu_encoder_wakeup_time(struct drm_encoder *drm_enc,
                ktime_t *wakeup_time)
{
        struct drm_display_mode *mode;
        struct dpu_encoder_virt *dpu_enc;
        u32 cur_line;
        u32 line_time;
        u32 vtotal, time_to_vsync;
        ktime_t cur_time;

        dpu_enc = to_dpu_encoder_virt(drm_enc);

        if (!drm_enc->crtc || !drm_enc->crtc->state) {
                DPU_ERROR("crtc/crtc state object is NULL\n");
                return -EINVAL;
        }
        mode = &drm_enc->crtc->state->adjusted_mode;

        line_time = _dpu_encoder_calculate_linetime(dpu_enc, mode);
        if (!line_time)
                return -EINVAL;

        cur_line = dpu_enc->cur_master->ops.get_line_count(dpu_enc->cur_master);

        vtotal = mode->vtotal;
        if (cur_line >= vtotal)
                time_to_vsync = line_time * vtotal;
        else
                time_to_vsync = line_time * (vtotal - cur_line);

        if (time_to_vsync == 0) {
                DPU_ERROR("time to vsync should not be zero, vtotal=%d\n",
                                vtotal);
                return -EINVAL;
        }

        cur_time = ktime_get();
        *wakeup_time = ktime_add_ns(cur_time, time_to_vsync);

        DPU_DEBUG_ENC(dpu_enc,
                        "cur_line=%u vtotal=%u time_to_vsync=%u, cur_time=%lld, wakeup_time=%lld\n",
                        cur_line, vtotal, time_to_vsync,
                        ktime_to_ms(cur_time),
                        ktime_to_ms(*wakeup_time));
        return 0;
}

static void dpu_encoder_vsync_event_handler(struct timer_list *t)
{
        struct dpu_encoder_virt *dpu_enc = from_timer(dpu_enc, t,
                        vsync_event_timer);
        struct drm_encoder *drm_enc = &dpu_enc->base;
        struct msm_drm_private *priv;
        struct msm_drm_thread *event_thread;

        if (!drm_enc->dev || !drm_enc->dev->dev_private ||
                        !drm_enc->crtc) {
                DPU_ERROR("invalid parameters\n");
                return;
        }

        priv = drm_enc->dev->dev_private;

        if (drm_enc->crtc->index >= ARRAY_SIZE(priv->event_thread)) {
                DPU_ERROR("invalid crtc index\n");
                return;
        }
        event_thread = &priv->event_thread[drm_enc->crtc->index];
        if (!event_thread) {
                DPU_ERROR("event_thread not found for crtc:%d\n",
                                drm_enc->crtc->index);
                return;
        }

        del_timer(&dpu_enc->vsync_event_timer);
}

static void dpu_encoder_vsync_event_work_handler(struct kthread_work *work)
{
        struct dpu_encoder_virt *dpu_enc = container_of(work,
                        struct dpu_encoder_virt, vsync_event_work);
        ktime_t wakeup_time;

        if (!dpu_enc) {
                DPU_ERROR("invalid dpu encoder\n");
                return;
        }

        if (_dpu_encoder_wakeup_time(&dpu_enc->base, &wakeup_time))
                return;

        trace_dpu_enc_vsync_event_work(DRMID(&dpu_enc->base), wakeup_time);
        mod_timer(&dpu_enc->vsync_event_timer,
                        nsecs_to_jiffies(ktime_to_ns(wakeup_time)));
}

void dpu_encoder_prepare_for_kickoff(struct drm_encoder *drm_enc, bool async)
{
        struct dpu_encoder_virt *dpu_enc;
        struct dpu_encoder_phys *phys;
        bool needs_hw_reset = false;
        unsigned int i;

        if (!drm_enc) {
                DPU_ERROR("invalid args\n");
                return;
        }
        dpu_enc = to_dpu_encoder_virt(drm_enc);

        trace_dpu_enc_prepare_kickoff(DRMID(drm_enc));

        /* prepare for next kickoff, may include waiting on previous kickoff */
        DPU_ATRACE_BEGIN("enc_prepare_for_kickoff");
        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                phys = dpu_enc->phys_encs[i];
                if (phys) {
                        if (phys->ops.prepare_for_kickoff)
                                phys->ops.prepare_for_kickoff(phys);
                        if (phys->enable_state == DPU_ENC_ERR_NEEDS_HW_RESET)
                                needs_hw_reset = true;
                }
        }
        DPU_ATRACE_END("enc_prepare_for_kickoff");

        dpu_encoder_resource_control(drm_enc, DPU_ENC_RC_EVENT_KICKOFF);

        /* if any phys needs reset, reset all phys, in-order */
        if (needs_hw_reset) {
                trace_dpu_enc_prepare_kickoff_reset(DRMID(drm_enc));
                for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                        dpu_encoder_helper_hw_reset(dpu_enc->phys_encs[i]);
                }
        }
}

void dpu_encoder_kickoff(struct drm_encoder *drm_enc, bool async)
{
        struct dpu_encoder_virt *dpu_enc;
        struct dpu_encoder_phys *phys;
        ktime_t wakeup_time;
        unsigned int i;

        if (!drm_enc) {
                DPU_ERROR("invalid encoder\n");
                return;
        }
        DPU_ATRACE_BEGIN("encoder_kickoff");
        dpu_enc = to_dpu_encoder_virt(drm_enc);

        trace_dpu_enc_kickoff(DRMID(drm_enc));

        /*
         * Asynchronous frames don't handle FRAME_DONE events. As such, they
         * shouldn't enable the frame_done watchdog since it will always time
         * out.
         */
        if (!async) {
                unsigned long timeout_ms;
                timeout_ms = DPU_ENCODER_FRAME_DONE_TIMEOUT_FRAMES * 1000 /
                        drm_mode_vrefresh(&drm_enc->crtc->state->adjusted_mode);

                atomic_set(&dpu_enc->frame_done_timeout_ms, timeout_ms);
                mod_timer(&dpu_enc->frame_done_timer,
                          jiffies + msecs_to_jiffies(timeout_ms));
        }

        /* All phys encs are ready to go, trigger the kickoff */
        _dpu_encoder_kickoff_phys(dpu_enc, async);

        /* allow phys encs to handle any post-kickoff business */
        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                phys = dpu_enc->phys_encs[i];
                if (phys && phys->ops.handle_post_kickoff)
                        phys->ops.handle_post_kickoff(phys);
        }

        if (dpu_enc->disp_info.intf_type == DRM_MODE_ENCODER_DSI &&
                        !_dpu_encoder_wakeup_time(drm_enc, &wakeup_time)) {
                trace_dpu_enc_early_kickoff(DRMID(drm_enc),
                                            ktime_to_ms(wakeup_time));
                mod_timer(&dpu_enc->vsync_event_timer,
                                nsecs_to_jiffies(ktime_to_ns(wakeup_time)));
        }

        DPU_ATRACE_END("encoder_kickoff");
}

void dpu_encoder_prepare_commit(struct drm_encoder *drm_enc)
{
        struct dpu_encoder_virt *dpu_enc;
        struct dpu_encoder_phys *phys;
        int i;

        if (!drm_enc) {
                DPU_ERROR("invalid encoder\n");
                return;
        }
        dpu_enc = to_dpu_encoder_virt(drm_enc);

        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                phys = dpu_enc->phys_encs[i];
                if (phys && phys->ops.prepare_commit)
                        phys->ops.prepare_commit(phys);
        }
}

#ifdef CONFIG_DEBUG_FS
static int _dpu_encoder_status_show(struct seq_file *s, void *data)
{
        struct dpu_encoder_virt *dpu_enc = s->private;
        int i;

        mutex_lock(&dpu_enc->enc_lock);
        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];

                if (!phys)
                        continue;

                seq_printf(s, "intf:%d    vsync:%8d     underrun:%8d    ",
                                phys->intf_idx - INTF_0,
                                atomic_read(&phys->vsync_cnt),
                                atomic_read(&phys->underrun_cnt));

                switch (phys->intf_mode) {
                case INTF_MODE_VIDEO:
                        seq_puts(s, "mode: video\n");
                        break;
                case INTF_MODE_CMD:
                        seq_puts(s, "mode: command\n");
                        break;
                default:
                        seq_puts(s, "mode: ???\n");
                        break;
                }
        }
        mutex_unlock(&dpu_enc->enc_lock);

        return 0;
}

static int _dpu_encoder_debugfs_status_open(struct inode *inode,
                struct file *file)
{
        return single_open(file, _dpu_encoder_status_show, inode->i_private);
}

static int _dpu_encoder_init_debugfs(struct drm_encoder *drm_enc)
{
        struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
        struct msm_drm_private *priv;
        struct dpu_kms *dpu_kms;
        int i;

        static const struct file_operations debugfs_status_fops = {
                .open =         _dpu_encoder_debugfs_status_open,
                .read =         seq_read,
                .llseek =       seq_lseek,
                .release =      single_release,
        };

        char name[DPU_NAME_SIZE];

        if (!drm_enc->dev || !drm_enc->dev->dev_private) {
                DPU_ERROR("invalid encoder or kms\n");
                return -EINVAL;
        }

        priv = drm_enc->dev->dev_private;
        dpu_kms = to_dpu_kms(priv->kms);

        snprintf(name, DPU_NAME_SIZE, "encoder%u", drm_enc->base.id);

        /* create overall sub-directory for the encoder */
        dpu_enc->debugfs_root = debugfs_create_dir(name,
                        drm_enc->dev->primary->debugfs_root);

        /* don't error check these */
        debugfs_create_file("status", 0600,
                dpu_enc->debugfs_root, dpu_enc, &debugfs_status_fops);

        for (i = 0; i < dpu_enc->num_phys_encs; i++)
                if (dpu_enc->phys_encs[i] &&
                                dpu_enc->phys_encs[i]->ops.late_register)
                        dpu_enc->phys_encs[i]->ops.late_register(
                                        dpu_enc->phys_encs[i],
                                        dpu_enc->debugfs_root);

        return 0;
}
#else
static int _dpu_encoder_init_debugfs(struct drm_encoder *drm_enc)
{
        return 0;
}
#endif

static int dpu_encoder_late_register(struct drm_encoder *encoder)
{
        return _dpu_encoder_init_debugfs(encoder);
}

static void dpu_encoder_early_unregister(struct drm_encoder *encoder)

{
        struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(encoder);

        debugfs_remove_recursive(dpu_enc->debugfs_root);
}

static int dpu_encoder_virt_add_phys_encs(
                u32 display_caps,
                struct dpu_encoder_virt *dpu_enc,
                struct dpu_enc_phys_init_params *params)
{
        struct dpu_encoder_phys *enc = NULL;

        DPU_DEBUG_ENC(dpu_enc, "\n");

        /*
         * We may create up to NUM_PHYS_ENCODER_TYPES physical encoder types
         * in this function, check up-front.
         */
        if (dpu_enc->num_phys_encs + NUM_PHYS_ENCODER_TYPES >=
                        ARRAY_SIZE(dpu_enc->phys_encs)) {
                DPU_ERROR_ENC(dpu_enc, "too many physical encoders %d\n",
                          dpu_enc->num_phys_encs);
                return -EINVAL;
        }

        if (display_caps & MSM_DISPLAY_CAP_VID_MODE) {
                enc = dpu_encoder_phys_vid_init(params);

                if (IS_ERR_OR_NULL(enc)) {
                        DPU_ERROR_ENC(dpu_enc, "failed to init vid enc: %ld\n",
                                PTR_ERR(enc));
                        return enc == 0 ? -EINVAL : PTR_ERR(enc);
                }

                dpu_enc->phys_encs[dpu_enc->num_phys_encs] = enc;
                ++dpu_enc->num_phys_encs;
        }

        if (display_caps & MSM_DISPLAY_CAP_CMD_MODE) {
                enc = dpu_encoder_phys_cmd_init(params);

                if (IS_ERR_OR_NULL(enc)) {
                        DPU_ERROR_ENC(dpu_enc, "failed to init cmd enc: %ld\n",
                                PTR_ERR(enc));
                        return enc == 0 ? -EINVAL : PTR_ERR(enc);
                }

                dpu_enc->phys_encs[dpu_enc->num_phys_encs] = enc;
                ++dpu_enc->num_phys_encs;
        }

        if (params->split_role == ENC_ROLE_SLAVE)
                dpu_enc->cur_slave = enc;
        else
                dpu_enc->cur_master = enc;

        return 0;
}

static const struct dpu_encoder_virt_ops dpu_encoder_parent_ops = {
        .handle_vblank_virt = dpu_encoder_vblank_callback,
        .handle_underrun_virt = dpu_encoder_underrun_callback,
        .handle_frame_done = dpu_encoder_frame_done_callback,
};

static int dpu_encoder_setup_display(struct dpu_encoder_virt *dpu_enc,
                                 struct dpu_kms *dpu_kms,
                                 struct msm_display_info *disp_info)
{
        int ret = 0;
        int i = 0;
        enum dpu_intf_type intf_type;
        struct dpu_enc_phys_init_params phys_params;

        if (!dpu_enc || !dpu_kms) {
                DPU_ERROR("invalid arg(s), enc %d kms %d\n",
                                dpu_enc != 0, dpu_kms != 0);
                return -EINVAL;
        }

        dpu_enc->cur_master = NULL;

        memset(&phys_params, 0, sizeof(phys_params));
        phys_params.dpu_kms = dpu_kms;
        phys_params.parent = &dpu_enc->base;
        phys_params.parent_ops = &dpu_encoder_parent_ops;
        phys_params.enc_spinlock = &dpu_enc->enc_spinlock;

        DPU_DEBUG("\n");

        switch (disp_info->intf_type) {
        case DRM_MODE_ENCODER_DSI:
                intf_type = INTF_DSI;
                break;
        default:
                DPU_ERROR_ENC(dpu_enc, "unsupported display interface type\n");
                return -EINVAL;
        }

        WARN_ON(disp_info->num_of_h_tiles < 1);

        DPU_DEBUG("dsi_info->num_of_h_tiles %d\n", disp_info->num_of_h_tiles);

        if ((disp_info->capabilities & MSM_DISPLAY_CAP_CMD_MODE) ||
            (disp_info->capabilities & MSM_DISPLAY_CAP_VID_MODE))
                dpu_enc->idle_pc_supported =
                                dpu_kms->catalog->caps->has_idle_pc;

        mutex_lock(&dpu_enc->enc_lock);
        for (i = 0; i < disp_info->num_of_h_tiles && !ret; i++) {
                /*
                 * Left-most tile is at index 0, content is controller id
                 * h_tile_instance_ids[2] = {0, 1}; DSI0 = left, DSI1 = right
                 * h_tile_instance_ids[2] = {1, 0}; DSI1 = left, DSI0 = right
                 */
                u32 controller_id = disp_info->h_tile_instance[i];

                if (disp_info->num_of_h_tiles > 1) {
                        if (i == 0)
                                phys_params.split_role = ENC_ROLE_MASTER;
                        else
                                phys_params.split_role = ENC_ROLE_SLAVE;
                } else {
                        phys_params.split_role = ENC_ROLE_SOLO;
                }

                DPU_DEBUG("h_tile_instance %d = %d, split_role %d\n",
                                i, controller_id, phys_params.split_role);

                phys_params.intf_idx = dpu_encoder_get_intf(dpu_kms->catalog,
                                                                                                        intf_type,
                                                                                                        controller_id);
                if (phys_params.intf_idx == INTF_MAX) {
                        DPU_ERROR_ENC(dpu_enc, "could not get intf: type %d, id %d\n",
                                                  intf_type, controller_id);
                        ret = -EINVAL;
                }

                if (!ret) {
                        ret = dpu_encoder_virt_add_phys_encs(disp_info->capabilities,
                                                                                                 dpu_enc,
                                                                                                 &phys_params);
                        if (ret)
                                DPU_ERROR_ENC(dpu_enc, "failed to add phys encs\n");
                }
        }

        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];

                if (phys) {
                        atomic_set(&phys->vsync_cnt, 0);
                        atomic_set(&phys->underrun_cnt, 0);
                }
        }
        mutex_unlock(&dpu_enc->enc_lock);

        return ret;
}

static void dpu_encoder_frame_done_timeout(struct timer_list *t)
{
        struct dpu_encoder_virt *dpu_enc = from_timer(dpu_enc, t,
                        frame_done_timer);
        struct drm_encoder *drm_enc = &dpu_enc->base;
        struct msm_drm_private *priv;
        u32 event;

        if (!drm_enc->dev || !drm_enc->dev->dev_private) {
                DPU_ERROR("invalid parameters\n");
                return;
        }
        priv = drm_enc->dev->dev_private;

        if (!dpu_enc->frame_busy_mask[0] || !dpu_enc->crtc_frame_event_cb) {
                DRM_DEBUG_KMS("id:%u invalid timeout frame_busy_mask=%lu\n",
                              DRMID(drm_enc), dpu_enc->frame_busy_mask[0]);
                return;
        } else if (!atomic_xchg(&dpu_enc->frame_done_timeout_ms, 0)) {
                DRM_DEBUG_KMS("id:%u invalid timeout\n", DRMID(drm_enc));
                return;
        }

        DPU_ERROR_ENC(dpu_enc, "frame done timeout\n");

        event = DPU_ENCODER_FRAME_EVENT_ERROR;
        trace_dpu_enc_frame_done_timeout(DRMID(drm_enc), event);
        dpu_enc->crtc_frame_event_cb(dpu_enc->crtc_frame_event_cb_data, event);
}

static const struct drm_encoder_helper_funcs dpu_encoder_helper_funcs = {
        .mode_set = dpu_encoder_virt_mode_set,
        .disable = dpu_encoder_virt_disable,
        .enable = dpu_kms_encoder_enable,
        .atomic_check = dpu_encoder_virt_atomic_check,

        /* This is called by dpu_kms_encoder_enable */
        .commit = dpu_encoder_virt_enable,
};

static const struct drm_encoder_funcs dpu_encoder_funcs = {
                .destroy = dpu_encoder_destroy,
                .late_register = dpu_encoder_late_register,
                .early_unregister = dpu_encoder_early_unregister,
};

int dpu_encoder_setup(struct drm_device *dev, struct drm_encoder *enc,
                struct msm_display_info *disp_info)
{
        struct msm_drm_private *priv = dev->dev_private;
        struct dpu_kms *dpu_kms = to_dpu_kms(priv->kms);
        struct drm_encoder *drm_enc = NULL;
        struct dpu_encoder_virt *dpu_enc = NULL;
        int ret = 0;

        dpu_enc = to_dpu_encoder_virt(enc);

        mutex_init(&dpu_enc->enc_lock);
        ret = dpu_encoder_setup_display(dpu_enc, dpu_kms, disp_info);
        if (ret)
                goto fail;

        atomic_set(&dpu_enc->frame_done_timeout_ms, 0);
        timer_setup(&dpu_enc->frame_done_timer,
                        dpu_encoder_frame_done_timeout, 0);

        if (disp_info->intf_type == DRM_MODE_ENCODER_DSI)
                timer_setup(&dpu_enc->vsync_event_timer,
                                dpu_encoder_vsync_event_handler,
                                0);


        mutex_init(&dpu_enc->rc_lock);
        INIT_DELAYED_WORK(&dpu_enc->delayed_off_work,
                        dpu_encoder_off_work);
        dpu_enc->idle_timeout = IDLE_TIMEOUT;

        kthread_init_work(&dpu_enc->vsync_event_work,
                        dpu_encoder_vsync_event_work_handler);

        memcpy(&dpu_enc->disp_info, disp_info, sizeof(*disp_info));

        DPU_DEBUG_ENC(dpu_enc, "created\n");

        return ret;

fail:
        DPU_ERROR("failed to create encoder\n");
        if (drm_enc)
                dpu_encoder_destroy(drm_enc);

        return ret;


}

struct drm_encoder *dpu_encoder_init(struct drm_device *dev,
                int drm_enc_mode)
{
        struct dpu_encoder_virt *dpu_enc = NULL;
        int rc = 0;

        dpu_enc = devm_kzalloc(dev->dev, sizeof(*dpu_enc), GFP_KERNEL);
        if (!dpu_enc)
                return ERR_PTR(ENOMEM);

        rc = drm_encoder_init(dev, &dpu_enc->base, &dpu_encoder_funcs,
                        drm_enc_mode, NULL);
        if (rc) {
                devm_kfree(dev->dev, dpu_enc);
                return ERR_PTR(rc);
        }

        drm_encoder_helper_add(&dpu_enc->base, &dpu_encoder_helper_funcs);

        spin_lock_init(&dpu_enc->enc_spinlock);
        dpu_enc->enabled = false;

        return &dpu_enc->base;
}

int dpu_encoder_wait_for_event(struct drm_encoder *drm_enc,
        enum msm_event_wait event)
{
        int (*fn_wait)(struct dpu_encoder_phys *phys_enc) = NULL;
        struct dpu_encoder_virt *dpu_enc = NULL;
        int i, ret = 0;

        if (!drm_enc) {
                DPU_ERROR("invalid encoder\n");
                return -EINVAL;
        }
        dpu_enc = to_dpu_encoder_virt(drm_enc);
        DPU_DEBUG_ENC(dpu_enc, "\n");

        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];
                if (!phys)
                        continue;

                switch (event) {
                case MSM_ENC_COMMIT_DONE:
                        fn_wait = phys->ops.wait_for_commit_done;
                        break;
                case MSM_ENC_TX_COMPLETE:
                        fn_wait = phys->ops.wait_for_tx_complete;
                        break;
                case MSM_ENC_VBLANK:
                        fn_wait = phys->ops.wait_for_vblank;
                        break;
                default:
                        DPU_ERROR_ENC(dpu_enc, "unknown wait event %d\n",
                                        event);
                        return -EINVAL;
                };

                if (fn_wait) {
                        DPU_ATRACE_BEGIN("wait_for_completion_event");
                        ret = fn_wait(phys);
                        DPU_ATRACE_END("wait_for_completion_event");
                        if (ret)
                                return ret;
                }
        }

        return ret;
}

enum dpu_intf_mode dpu_encoder_get_intf_mode(struct drm_encoder *encoder)
{
        struct dpu_encoder_virt *dpu_enc = NULL;
        int i;

        if (!encoder) {
                DPU_ERROR("invalid encoder\n");
                return INTF_MODE_NONE;
        }
        dpu_enc = to_dpu_encoder_virt(encoder);

        if (dpu_enc->cur_master)
                return dpu_enc->cur_master->intf_mode;

        for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];

                if (phys)
                        return phys->intf_mode;
        }

        return INTF_MODE_NONE;
}