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

#include <linux/delay.h>
#include <linux/interconnect.h>
#include <linux/of_irq.h>

#include <drm/drm_debugfs.h>
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include <drm/drm_vblank.h>

#include "msm_drv.h"
#include "msm_gem.h"
#include "msm_mmu.h"
#include "mdp5_kms.h"

static int mdp5_hw_init(struct msm_kms *kms)
{
        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
        struct device *dev = &mdp5_kms->pdev->dev;
        unsigned long flags;

        pm_runtime_get_sync(dev);

        /* Magic unknown register writes:
         *
         *    W VBIF:0x004 00000001      (mdss_mdp.c:839)
         *    W MDP5:0x2e0 0xe9          (mdss_mdp.c:839)
         *    W MDP5:0x2e4 0x55          (mdss_mdp.c:839)
         *    W MDP5:0x3ac 0xc0000ccc    (mdss_mdp.c:839)
         *    W MDP5:0x3b4 0xc0000ccc    (mdss_mdp.c:839)
         *    W MDP5:0x3bc 0xcccccc      (mdss_mdp.c:839)
         *    W MDP5:0x4a8 0xcccc0c0     (mdss_mdp.c:839)
         *    W MDP5:0x4b0 0xccccc0c0    (mdss_mdp.c:839)
         *    W MDP5:0x4b8 0xccccc000    (mdss_mdp.c:839)
         *
         * Downstream fbdev driver gets these register offsets/values
         * from DT.. not really sure what these registers are or if
         * different values for different boards/SoC's, etc.  I guess
         * they are the golden registers.
         *
         * Not setting these does not seem to cause any problem.  But
         * we may be getting lucky with the bootloader initializing
         * them for us.  OTOH, if we can always count on the bootloader
         * setting the golden registers, then perhaps we don't need to
         * care.
         */

        spin_lock_irqsave(&mdp5_kms->resource_lock, flags);
        mdp5_write(mdp5_kms, REG_MDP5_DISP_INTF_SEL, 0);
        spin_unlock_irqrestore(&mdp5_kms->resource_lock, flags);

        mdp5_ctlm_hw_reset(mdp5_kms->ctlm);

        pm_runtime_put_sync(dev);

        return 0;
}

/* Global/shared object state funcs */

/*
 * This is a helper that returns the private state currently in operation.
 * Note that this would return the "old_state" if called in the atomic check
 * path, and the "new_state" after the atomic swap has been done.
 */
struct mdp5_global_state *
mdp5_get_existing_global_state(struct mdp5_kms *mdp5_kms)
{
        return to_mdp5_global_state(mdp5_kms->glob_state.state);
}

/*
 * This acquires the modeset lock set aside for global state, creates
 * a new duplicated private object state.
 */
struct mdp5_global_state *mdp5_get_global_state(struct drm_atomic_state *s)
{
        struct msm_drm_private *priv = s->dev->dev_private;
        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
        struct drm_private_state *priv_state;
        int ret;

        ret = drm_modeset_lock(&mdp5_kms->glob_state_lock, s->acquire_ctx);
        if (ret)
                return ERR_PTR(ret);

        priv_state = drm_atomic_get_private_obj_state(s, &mdp5_kms->glob_state);
        if (IS_ERR(priv_state))
                return ERR_CAST(priv_state);

        return to_mdp5_global_state(priv_state);
}

static struct drm_private_state *
mdp5_global_duplicate_state(struct drm_private_obj *obj)
{
        struct mdp5_global_state *state;

        state = kmemdup(obj->state, sizeof(*state), GFP_KERNEL);
        if (!state)
                return NULL;

        __drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);

        return &state->base;
}

static void mdp5_global_destroy_state(struct drm_private_obj *obj,
                                      struct drm_private_state *state)
{
        struct mdp5_global_state *mdp5_state = to_mdp5_global_state(state);

        kfree(mdp5_state);
}

static const struct drm_private_state_funcs mdp5_global_state_funcs = {
        .atomic_duplicate_state = mdp5_global_duplicate_state,
        .atomic_destroy_state = mdp5_global_destroy_state,
};

static int mdp5_global_obj_init(struct mdp5_kms *mdp5_kms)
{
        struct mdp5_global_state *state;

        drm_modeset_lock_init(&mdp5_kms->glob_state_lock);

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

        state->mdp5_kms = mdp5_kms;

        drm_atomic_private_obj_init(mdp5_kms->dev, &mdp5_kms->glob_state,
                                    &state->base,
                                    &mdp5_global_state_funcs);
        return 0;
}

static void mdp5_enable_commit(struct msm_kms *kms)
{
        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
        pm_runtime_get_sync(&mdp5_kms->pdev->dev);
}

static void mdp5_disable_commit(struct msm_kms *kms)
{
        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
        pm_runtime_put_sync(&mdp5_kms->pdev->dev);
}

static void mdp5_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state)
{
        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
        struct mdp5_global_state *global_state;

        global_state = mdp5_get_existing_global_state(mdp5_kms);

        if (mdp5_kms->smp)
                mdp5_smp_prepare_commit(mdp5_kms->smp, &global_state->smp);
}

static void mdp5_flush_commit(struct msm_kms *kms, unsigned crtc_mask)
{
        /* TODO */
}

static void mdp5_wait_flush(struct msm_kms *kms, unsigned crtc_mask)
{
        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
        struct drm_crtc *crtc;

        for_each_crtc_mask(mdp5_kms->dev, crtc, crtc_mask)
                mdp5_crtc_wait_for_commit_done(crtc);
}

static void mdp5_complete_commit(struct msm_kms *kms, unsigned crtc_mask)
{
        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
        struct mdp5_global_state *global_state;

        global_state = mdp5_get_existing_global_state(mdp5_kms);

        if (mdp5_kms->smp)
                mdp5_smp_complete_commit(mdp5_kms->smp, &global_state->smp);
}

static long mdp5_round_pixclk(struct msm_kms *kms, unsigned long rate,
                struct drm_encoder *encoder)
{
        return rate;
}

static int mdp5_set_split_display(struct msm_kms *kms,
                struct drm_encoder *encoder,
                struct drm_encoder *slave_encoder,
                bool is_cmd_mode)
{
        if (is_cmd_mode)
                return mdp5_cmd_encoder_set_split_display(encoder,
                                                        slave_encoder);
        else
                return mdp5_vid_encoder_set_split_display(encoder,
                                                          slave_encoder);
}

static void mdp5_set_encoder_mode(struct msm_kms *kms,
                                  struct drm_encoder *encoder,
                                  bool cmd_mode)
{
        mdp5_encoder_set_intf_mode(encoder, cmd_mode);
}

static void mdp5_kms_destroy(struct msm_kms *kms)
{
        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
        struct msm_gem_address_space *aspace = kms->aspace;
        int i;

        for (i = 0; i < mdp5_kms->num_hwmixers; i++)
                mdp5_mixer_destroy(mdp5_kms->hwmixers[i]);

        for (i = 0; i < mdp5_kms->num_hwpipes; i++)
                mdp5_pipe_destroy(mdp5_kms->hwpipes[i]);

        if (aspace) {
                aspace->mmu->funcs->detach(aspace->mmu);
                msm_gem_address_space_put(aspace);
        }

        mdp_kms_destroy(&mdp5_kms->base);
}

#ifdef CONFIG_DEBUG_FS
static int smp_show(struct seq_file *m, void *arg)
{
        struct drm_info_node *node = (struct drm_info_node *) m->private;
        struct drm_device *dev = node->minor->dev;
        struct msm_drm_private *priv = dev->dev_private;
        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
        struct drm_printer p = drm_seq_file_printer(m);

        if (!mdp5_kms->smp) {
                drm_printf(&p, "no SMP pool\n");
                return 0;
        }

        mdp5_smp_dump(mdp5_kms->smp, &p);

        return 0;
}

static struct drm_info_list mdp5_debugfs_list[] = {
                {"smp", smp_show },
};

static int mdp5_kms_debugfs_init(struct msm_kms *kms, struct drm_minor *minor)
{
        drm_debugfs_create_files(mdp5_debugfs_list,
                                 ARRAY_SIZE(mdp5_debugfs_list),
                                 minor->debugfs_root, minor);

        return 0;
}
#endif

static const struct mdp_kms_funcs kms_funcs = {
        .base = {
                .hw_init         = mdp5_hw_init,
                .irq_preinstall  = mdp5_irq_preinstall,
                .irq_postinstall = mdp5_irq_postinstall,
                .irq_uninstall   = mdp5_irq_uninstall,
                .irq             = mdp5_irq,
                .enable_vblank   = mdp5_enable_vblank,
                .disable_vblank  = mdp5_disable_vblank,
                .flush_commit    = mdp5_flush_commit,
                .enable_commit   = mdp5_enable_commit,
                .disable_commit  = mdp5_disable_commit,
                .prepare_commit  = mdp5_prepare_commit,
                .wait_flush      = mdp5_wait_flush,
                .complete_commit = mdp5_complete_commit,
                .get_format      = mdp_get_format,
                .round_pixclk    = mdp5_round_pixclk,
                .set_split_display = mdp5_set_split_display,
                .set_encoder_mode = mdp5_set_encoder_mode,
                .destroy         = mdp5_kms_destroy,
#ifdef CONFIG_DEBUG_FS
                .debugfs_init    = mdp5_kms_debugfs_init,
#endif
        },
        .set_irqmask         = mdp5_set_irqmask,
};

static int mdp5_disable(struct mdp5_kms *mdp5_kms)
{
        DBG("");

        mdp5_kms->enable_count--;
        WARN_ON(mdp5_kms->enable_count < 0);

        if (mdp5_kms->tbu_rt_clk)
                clk_disable_unprepare(mdp5_kms->tbu_rt_clk);
        if (mdp5_kms->tbu_clk)
                clk_disable_unprepare(mdp5_kms->tbu_clk);
        clk_disable_unprepare(mdp5_kms->ahb_clk);
        clk_disable_unprepare(mdp5_kms->axi_clk);
        clk_disable_unprepare(mdp5_kms->core_clk);
        if (mdp5_kms->lut_clk)
                clk_disable_unprepare(mdp5_kms->lut_clk);

        return 0;
}

static int mdp5_enable(struct mdp5_kms *mdp5_kms)
{
        DBG("");

        mdp5_kms->enable_count++;

        clk_prepare_enable(mdp5_kms->ahb_clk);
        clk_prepare_enable(mdp5_kms->axi_clk);
        clk_prepare_enable(mdp5_kms->core_clk);
        if (mdp5_kms->lut_clk)
                clk_prepare_enable(mdp5_kms->lut_clk);
        if (mdp5_kms->tbu_clk)
                clk_prepare_enable(mdp5_kms->tbu_clk);
        if (mdp5_kms->tbu_rt_clk)
                clk_prepare_enable(mdp5_kms->tbu_rt_clk);

        return 0;
}

static struct drm_encoder *construct_encoder(struct mdp5_kms *mdp5_kms,
                                             struct mdp5_interface *intf,
                                             struct mdp5_ctl *ctl)
{
        struct drm_device *dev = mdp5_kms->dev;
        struct msm_drm_private *priv = dev->dev_private;
        struct drm_encoder *encoder;

        encoder = mdp5_encoder_init(dev, intf, ctl);
        if (IS_ERR(encoder)) {
                DRM_DEV_ERROR(dev->dev, "failed to construct encoder\n");
                return encoder;
        }

        priv->encoders[priv->num_encoders++] = encoder;

        return encoder;
}

static int get_dsi_id_from_intf(const struct mdp5_cfg_hw *hw_cfg, int intf_num)
{
        const enum mdp5_intf_type *intfs = hw_cfg->intf.connect;
        const int intf_cnt = ARRAY_SIZE(hw_cfg->intf.connect);
        int id = 0, i;

        for (i = 0; i < intf_cnt; i++) {
                if (intfs[i] == INTF_DSI) {
                        if (intf_num == i)
                                return id;

                        id++;
                }
        }

        return -EINVAL;
}

static int modeset_init_intf(struct mdp5_kms *mdp5_kms,
                             struct mdp5_interface *intf)
{
        struct drm_device *dev = mdp5_kms->dev;
        struct msm_drm_private *priv = dev->dev_private;
        struct mdp5_ctl_manager *ctlm = mdp5_kms->ctlm;
        struct mdp5_ctl *ctl;
        struct drm_encoder *encoder;
        int ret = 0;

        switch (intf->type) {
        case INTF_eDP:
                if (!priv->edp)
                        break;

                ctl = mdp5_ctlm_request(ctlm, intf->num);
                if (!ctl) {
                        ret = -EINVAL;
                        break;
                }

                encoder = construct_encoder(mdp5_kms, intf, ctl);
                if (IS_ERR(encoder)) {
                        ret = PTR_ERR(encoder);
                        break;
                }

                ret = msm_edp_modeset_init(priv->edp, dev, encoder);
                break;
        case INTF_HDMI:
                if (!priv->hdmi)
                        break;

                ctl = mdp5_ctlm_request(ctlm, intf->num);
                if (!ctl) {
                        ret = -EINVAL;
                        break;
                }

                encoder = construct_encoder(mdp5_kms, intf, ctl);
                if (IS_ERR(encoder)) {
                        ret = PTR_ERR(encoder);
                        break;
                }

                ret = msm_hdmi_modeset_init(priv->hdmi, dev, encoder);
                break;
        case INTF_DSI:
        {
                const struct mdp5_cfg_hw *hw_cfg =
                                        mdp5_cfg_get_hw_config(mdp5_kms->cfg);
                int dsi_id = get_dsi_id_from_intf(hw_cfg, intf->num);

                if ((dsi_id >= ARRAY_SIZE(priv->dsi)) || (dsi_id < 0)) {
                        DRM_DEV_ERROR(dev->dev, "failed to find dsi from intf %d\n",
                                intf->num);
                        ret = -EINVAL;
                        break;
                }

                if (!priv->dsi[dsi_id])
                        break;

                ctl = mdp5_ctlm_request(ctlm, intf->num);
                if (!ctl) {
                        ret = -EINVAL;
                        break;
                }

                encoder = construct_encoder(mdp5_kms, intf, ctl);
                if (IS_ERR(encoder)) {
                        ret = PTR_ERR(encoder);
                        break;
                }

                ret = msm_dsi_modeset_init(priv->dsi[dsi_id], dev, encoder);
                break;
        }
        default:
                DRM_DEV_ERROR(dev->dev, "unknown intf: %d\n", intf->type);
                ret = -EINVAL;
                break;
        }

        return ret;
}

static int modeset_init(struct mdp5_kms *mdp5_kms)
{
        struct drm_device *dev = mdp5_kms->dev;
        struct msm_drm_private *priv = dev->dev_private;
        unsigned int num_crtcs;
        int i, ret, pi = 0, ci = 0;
        struct drm_plane *primary[MAX_BASES] = { NULL };
        struct drm_plane *cursor[MAX_BASES] = { NULL };

        /*
         * Construct encoders and modeset initialize connector devices
         * for each external display interface.
         */
        for (i = 0; i < mdp5_kms->num_intfs; i++) {
                ret = modeset_init_intf(mdp5_kms, mdp5_kms->intfs[i]);
                if (ret)
                        goto fail;
        }

        /*
         * We should ideally have less number of encoders (set up by parsing
         * the MDP5 interfaces) than the number of layer mixers present in HW,
         * but let's be safe here anyway
         */
        num_crtcs = min(priv->num_encoders, mdp5_kms->num_hwmixers);

        /*
         * Construct planes equaling the number of hw pipes, and CRTCs for the
         * N encoders set up by the driver. The first N planes become primary
         * planes for the CRTCs, with the remainder as overlay planes:
         */
        for (i = 0; i < mdp5_kms->num_hwpipes; i++) {
                struct mdp5_hw_pipe *hwpipe = mdp5_kms->hwpipes[i];
                struct drm_plane *plane;
                enum drm_plane_type type;

                if (i < num_crtcs)
                        type = DRM_PLANE_TYPE_PRIMARY;
                else if (hwpipe->caps & MDP_PIPE_CAP_CURSOR)
                        type = DRM_PLANE_TYPE_CURSOR;
                else
                        type = DRM_PLANE_TYPE_OVERLAY;

                plane = mdp5_plane_init(dev, type);
                if (IS_ERR(plane)) {
                        ret = PTR_ERR(plane);
                        DRM_DEV_ERROR(dev->dev, "failed to construct plane %d (%d)\n", i, ret);
                        goto fail;
                }
                priv->planes[priv->num_planes++] = plane;

                if (type == DRM_PLANE_TYPE_PRIMARY)
                        primary[pi++] = plane;
                if (type == DRM_PLANE_TYPE_CURSOR)
                        cursor[ci++] = plane;
        }

        for (i = 0; i < num_crtcs; i++) {
                struct drm_crtc *crtc;

                crtc  = mdp5_crtc_init(dev, primary[i], cursor[i], i);
                if (IS_ERR(crtc)) {
                        ret = PTR_ERR(crtc);
                        DRM_DEV_ERROR(dev->dev, "failed to construct crtc %d (%d)\n", i, ret);
                        goto fail;
                }
                priv->crtcs[priv->num_crtcs++] = crtc;
        }

        /*
         * Now that we know the number of crtcs we've created, set the possible
         * crtcs for the encoders
         */
        for (i = 0; i < priv->num_encoders; i++) {
                struct drm_encoder *encoder = priv->encoders[i];

                encoder->possible_crtcs = (1 << priv->num_crtcs) - 1;
        }

        return 0;

fail:
        return ret;
}

static void read_mdp_hw_revision(struct mdp5_kms *mdp5_kms,
                                 u32 *major, u32 *minor)
{
        struct device *dev = &mdp5_kms->pdev->dev;
        u32 version;

        pm_runtime_get_sync(dev);
        version = mdp5_read(mdp5_kms, REG_MDP5_HW_VERSION);
        pm_runtime_put_sync(dev);

        *major = FIELD(version, MDP5_HW_VERSION_MAJOR);
        *minor = FIELD(version, MDP5_HW_VERSION_MINOR);

        DRM_DEV_INFO(dev, "MDP5 version v%d.%d", *major, *minor);
}

static int get_clk(struct platform_device *pdev, struct clk **clkp,
                const char *name, bool mandatory)
{
        struct device *dev = &pdev->dev;
        struct clk *clk = msm_clk_get(pdev, name);
        if (IS_ERR(clk) && mandatory) {
                DRM_DEV_ERROR(dev, "failed to get %s (%ld)\n", name, PTR_ERR(clk));
                return PTR_ERR(clk);
        }
        if (IS_ERR(clk))
                DBG("skipping %s", name);
        else
                *clkp = clk;

        return 0;
}

struct msm_kms *mdp5_kms_init(struct drm_device *dev)
{
        struct msm_drm_private *priv = dev->dev_private;
        struct platform_device *pdev;
        struct mdp5_kms *mdp5_kms;
        struct mdp5_cfg *config;
        struct msm_kms *kms;
        struct msm_gem_address_space *aspace;
        int irq, i, ret;
        struct device *iommu_dev;

        /* priv->kms would have been populated by the MDP5 driver */
        kms = priv->kms;
        if (!kms)
                return NULL;

        mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
        pdev = mdp5_kms->pdev;

        ret = mdp_kms_init(&mdp5_kms->base, &kms_funcs);
        if (ret) {
                DRM_DEV_ERROR(&pdev->dev, "failed to init kms\n");
                goto fail;
        }

        irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
        if (irq < 0) {
                ret = irq;
                DRM_DEV_ERROR(&pdev->dev, "failed to get irq: %d\n", ret);
                goto fail;
        }

        kms->irq = irq;

        config = mdp5_cfg_get_config(mdp5_kms->cfg);

        /* make sure things are off before attaching iommu (bootloader could
         * have left things on, in which case we'll start getting faults if
         * we don't disable):
         */
        pm_runtime_get_sync(&pdev->dev);
        for (i = 0; i < MDP5_INTF_NUM_MAX; i++) {
                if (mdp5_cfg_intf_is_virtual(config->hw->intf.connect[i]) ||
                    !config->hw->intf.base[i])
                        continue;
                mdp5_write(mdp5_kms, REG_MDP5_INTF_TIMING_ENGINE_EN(i), 0);

                mdp5_write(mdp5_kms, REG_MDP5_INTF_FRAME_LINE_COUNT_EN(i), 0x3);
        }
        mdelay(16);

        if (config->platform.iommu) {
                struct msm_mmu *mmu;

                iommu_dev = &pdev->dev;
                if (!dev_iommu_fwspec_get(iommu_dev))
                        iommu_dev = iommu_dev->parent;

                mmu = msm_iommu_new(iommu_dev, config->platform.iommu);

                aspace = msm_gem_address_space_create(mmu, "mdp5",
                        0x1000, 0x100000000 - 0x1000);

                if (IS_ERR(aspace)) {
                        if (!IS_ERR(mmu))
                                mmu->funcs->destroy(mmu);
                        ret = PTR_ERR(aspace);
                        goto fail;
                }

                kms->aspace = aspace;
        } else {
                DRM_DEV_INFO(&pdev->dev,
                         "no iommu, fallback to phys contig buffers for scanout\n");
                aspace = NULL;
        }

        pm_runtime_put_sync(&pdev->dev);

        ret = modeset_init(mdp5_kms);
        if (ret) {
                DRM_DEV_ERROR(&pdev->dev, "modeset_init failed: %d\n", ret);
                goto fail;
        }

        dev->mode_config.min_width = 0;
        dev->mode_config.min_height = 0;
        dev->mode_config.max_width = 0xffff;
        dev->mode_config.max_height = 0xffff;

        dev->max_vblank_count = 0; /* max_vblank_count is set on each CRTC */
        dev->vblank_disable_immediate = true;

        return kms;
fail:
        if (kms)
                mdp5_kms_destroy(kms);
        return ERR_PTR(ret);
}

static void mdp5_destroy(struct platform_device *pdev)
{
        struct mdp5_kms *mdp5_kms = platform_get_drvdata(pdev);
        int i;

        if (mdp5_kms->ctlm)
                mdp5_ctlm_destroy(mdp5_kms->ctlm);
        if (mdp5_kms->smp)
                mdp5_smp_destroy(mdp5_kms->smp);
        if (mdp5_kms->cfg)
                mdp5_cfg_destroy(mdp5_kms->cfg);

        for (i = 0; i < mdp5_kms->num_intfs; i++)
                kfree(mdp5_kms->intfs[i]);

        if (mdp5_kms->rpm_enabled)
                pm_runtime_disable(&pdev->dev);

        drm_atomic_private_obj_fini(&mdp5_kms->glob_state);
        drm_modeset_lock_fini(&mdp5_kms->glob_state_lock);
}

static int construct_pipes(struct mdp5_kms *mdp5_kms, int cnt,
                const enum mdp5_pipe *pipes, const uint32_t *offsets,
                uint32_t caps)
{
        struct drm_device *dev = mdp5_kms->dev;
        int i, ret;

        for (i = 0; i < cnt; i++) {
                struct mdp5_hw_pipe *hwpipe;

                hwpipe = mdp5_pipe_init(pipes[i], offsets[i], caps);
                if (IS_ERR(hwpipe)) {
                        ret = PTR_ERR(hwpipe);
                        DRM_DEV_ERROR(dev->dev, "failed to construct pipe for %s (%d)\n",
                                        pipe2name(pipes[i]), ret);
                        return ret;
                }
                hwpipe->idx = mdp5_kms->num_hwpipes;
                mdp5_kms->hwpipes[mdp5_kms->num_hwpipes++] = hwpipe;
        }

        return 0;
}

static int hwpipe_init(struct mdp5_kms *mdp5_kms)
{
        static const enum mdp5_pipe rgb_planes[] = {
                        SSPP_RGB0, SSPP_RGB1, SSPP_RGB2, SSPP_RGB3,
        };
        static const enum mdp5_pipe vig_planes[] = {
                        SSPP_VIG0, SSPP_VIG1, SSPP_VIG2, SSPP_VIG3,
        };
        static const enum mdp5_pipe dma_planes[] = {
                        SSPP_DMA0, SSPP_DMA1,
        };
        static const enum mdp5_pipe cursor_planes[] = {
                        SSPP_CURSOR0, SSPP_CURSOR1,
        };
        const struct mdp5_cfg_hw *hw_cfg;
        int ret;

        hw_cfg = mdp5_cfg_get_hw_config(mdp5_kms->cfg);

        /* Construct RGB pipes: */
        ret = construct_pipes(mdp5_kms, hw_cfg->pipe_rgb.count, rgb_planes,
                        hw_cfg->pipe_rgb.base, hw_cfg->pipe_rgb.caps);
        if (ret)
                return ret;

        /* Construct video (VIG) pipes: */
        ret = construct_pipes(mdp5_kms, hw_cfg->pipe_vig.count, vig_planes,
                        hw_cfg->pipe_vig.base, hw_cfg->pipe_vig.caps);
        if (ret)
                return ret;

        /* Construct DMA pipes: */
        ret = construct_pipes(mdp5_kms, hw_cfg->pipe_dma.count, dma_planes,
                        hw_cfg->pipe_dma.base, hw_cfg->pipe_dma.caps);
        if (ret)
                return ret;

        /* Construct cursor pipes: */
        ret = construct_pipes(mdp5_kms, hw_cfg->pipe_cursor.count,
                        cursor_planes, hw_cfg->pipe_cursor.base,
                        hw_cfg->pipe_cursor.caps);
        if (ret)
                return ret;

        return 0;
}

static int hwmixer_init(struct mdp5_kms *mdp5_kms)
{
        struct drm_device *dev = mdp5_kms->dev;
        const struct mdp5_cfg_hw *hw_cfg;
        int i, ret;

        hw_cfg = mdp5_cfg_get_hw_config(mdp5_kms->cfg);

        for (i = 0; i < hw_cfg->lm.count; i++) {
                struct mdp5_hw_mixer *mixer;

                mixer = mdp5_mixer_init(&hw_cfg->lm.instances[i]);
                if (IS_ERR(mixer)) {
                        ret = PTR_ERR(mixer);
                        DRM_DEV_ERROR(dev->dev, "failed to construct LM%d (%d)\n",
                                i, ret);
                        return ret;
                }

                mixer->idx = mdp5_kms->num_hwmixers;
                mdp5_kms->hwmixers[mdp5_kms->num_hwmixers++] = mixer;
        }

        return 0;
}

static int interface_init(struct mdp5_kms *mdp5_kms)
{
        struct drm_device *dev = mdp5_kms->dev;
        const struct mdp5_cfg_hw *hw_cfg;
        const enum mdp5_intf_type *intf_types;
        int i;

        hw_cfg = mdp5_cfg_get_hw_config(mdp5_kms->cfg);
        intf_types = hw_cfg->intf.connect;

        for (i = 0; i < ARRAY_SIZE(hw_cfg->intf.connect); i++) {
                struct mdp5_interface *intf;

                if (intf_types[i] == INTF_DISABLED)
                        continue;

                intf = kzalloc(sizeof(*intf), GFP_KERNEL);
                if (!intf) {
                        DRM_DEV_ERROR(dev->dev, "failed to construct INTF%d\n", i);
                        return -ENOMEM;
                }

                intf->num = i;
                intf->type = intf_types[i];
                intf->mode = MDP5_INTF_MODE_NONE;
                intf->idx = mdp5_kms->num_intfs;
                mdp5_kms->intfs[mdp5_kms->num_intfs++] = intf;
        }

        return 0;
}

static int mdp5_init(struct platform_device *pdev, struct drm_device *dev)
{
        struct msm_drm_private *priv = dev->dev_private;
        struct mdp5_kms *mdp5_kms;
        struct mdp5_cfg *config;
        u32 major, minor;
        int ret;

        mdp5_kms = devm_kzalloc(&pdev->dev, sizeof(*mdp5_kms), GFP_KERNEL);
        if (!mdp5_kms) {
                ret = -ENOMEM;
                goto fail;
        }

        platform_set_drvdata(pdev, mdp5_kms);

        spin_lock_init(&mdp5_kms->resource_lock);

        mdp5_kms->dev = dev;
        mdp5_kms->pdev = pdev;

        ret = mdp5_global_obj_init(mdp5_kms);
        if (ret)
                goto fail;

        mdp5_kms->mmio = msm_ioremap(pdev, "mdp_phys", "MDP5");
        if (IS_ERR(mdp5_kms->mmio)) {
                ret = PTR_ERR(mdp5_kms->mmio);
                goto fail;
        }

        /* mandatory clocks: */
        ret = get_clk(pdev, &mdp5_kms->axi_clk, "bus", true);
        if (ret)
                goto fail;
        ret = get_clk(pdev, &mdp5_kms->ahb_clk, "iface", true);
        if (ret)
                goto fail;
        ret = get_clk(pdev, &mdp5_kms->core_clk, "core", true);
        if (ret)
                goto fail;
        ret = get_clk(pdev, &mdp5_kms->vsync_clk, "vsync", true);
        if (ret)
                goto fail;

        /* optional clocks: */
        get_clk(pdev, &mdp5_kms->lut_clk, "lut", false);
        get_clk(pdev, &mdp5_kms->tbu_clk, "tbu", false);
        get_clk(pdev, &mdp5_kms->tbu_rt_clk, "tbu_rt", false);

        /* we need to set a default rate before enabling.  Set a safe
         * rate first, then figure out hw revision, and then set a
         * more optimal rate:
         */
        clk_set_rate(mdp5_kms->core_clk, 200000000);

        pm_runtime_enable(&pdev->dev);
        mdp5_kms->rpm_enabled = true;

        read_mdp_hw_revision(mdp5_kms, &major, &minor);

        mdp5_kms->cfg = mdp5_cfg_init(mdp5_kms, major, minor);
        if (IS_ERR(mdp5_kms->cfg)) {
                ret = PTR_ERR(mdp5_kms->cfg);
                mdp5_kms->cfg = NULL;
                goto fail;
        }

        config = mdp5_cfg_get_config(mdp5_kms->cfg);
        mdp5_kms->caps = config->hw->mdp.caps;

        /* TODO: compute core clock rate at runtime */
        clk_set_rate(mdp5_kms->core_clk, config->hw->max_clk);

        /*
         * Some chipsets have a Shared Memory Pool (SMP), while others
         * have dedicated latency buffering per source pipe instead;
         * this section initializes the SMP:
         */
        if (mdp5_kms->caps & MDP_CAP_SMP) {
                mdp5_kms->smp = mdp5_smp_init(mdp5_kms, &config->hw->smp);
                if (IS_ERR(mdp5_kms->smp)) {
                        ret = PTR_ERR(mdp5_kms->smp);
                        mdp5_kms->smp = NULL;
                        goto fail;
                }
        }

        mdp5_kms->ctlm = mdp5_ctlm_init(dev, mdp5_kms->mmio, mdp5_kms->cfg);
        if (IS_ERR(mdp5_kms->ctlm)) {
                ret = PTR_ERR(mdp5_kms->ctlm);
                mdp5_kms->ctlm = NULL;
                goto fail;
        }

        ret = hwpipe_init(mdp5_kms);
        if (ret)
                goto fail;

        ret = hwmixer_init(mdp5_kms);
        if (ret)
                goto fail;

        ret = interface_init(mdp5_kms);
        if (ret)
                goto fail;

        /* set uninit-ed kms */
        priv->kms = &mdp5_kms->base.base;

        return 0;
fail:
        if (mdp5_kms)
                mdp5_destroy(pdev);
        return ret;
}

static int mdp5_bind(struct device *dev, struct device *master, void *data)
{
        struct drm_device *ddev = dev_get_drvdata(master);
        struct platform_device *pdev = to_platform_device(dev);

        DBG("");

        return mdp5_init(pdev, ddev);
}

static void mdp5_unbind(struct device *dev, struct device *master,
                        void *data)
{
        struct platform_device *pdev = to_platform_device(dev);

        mdp5_destroy(pdev);
}

static const struct component_ops mdp5_ops = {
        .bind   = mdp5_bind,
        .unbind = mdp5_unbind,
};

static int mdp5_setup_interconnect(struct platform_device *pdev)
{
        struct icc_path *path0 = of_icc_get(&pdev->dev, "mdp0-mem");
        struct icc_path *path1 = of_icc_get(&pdev->dev, "mdp1-mem");
        struct icc_path *path_rot = of_icc_get(&pdev->dev, "rotator-mem");

        if (IS_ERR(path0))
                return PTR_ERR(path0);

        if (!path0) {
                /* no interconnect support is not necessarily a fatal
                 * condition, the platform may simply not have an
                 * interconnect driver yet.  But warn about it in case
                 * bootloader didn't setup bus clocks high enough for
                 * scanout.
                 */
                dev_warn(&pdev->dev, "No interconnect support may cause display underflows!\n");
                return 0;
        }

        icc_set_bw(path0, 0, MBps_to_icc(6400));

        if (!IS_ERR_OR_NULL(path1))
                icc_set_bw(path1, 0, MBps_to_icc(6400));
        if (!IS_ERR_OR_NULL(path_rot))
                icc_set_bw(path_rot, 0, MBps_to_icc(6400));

        return 0;
}

static int mdp5_dev_probe(struct platform_device *pdev)
{
        int ret;

        DBG("");

        ret = mdp5_setup_interconnect(pdev);
        if (ret)
                return ret;

        return component_add(&pdev->dev, &mdp5_ops);
}

static int mdp5_dev_remove(struct platform_device *pdev)
{
        DBG("");
        component_del(&pdev->dev, &mdp5_ops);
        return 0;
}

static __maybe_unused int mdp5_runtime_suspend(struct device *dev)
{
        struct platform_device *pdev = to_platform_device(dev);
        struct mdp5_kms *mdp5_kms = platform_get_drvdata(pdev);

        DBG("");

        return mdp5_disable(mdp5_kms);
}

static __maybe_unused int mdp5_runtime_resume(struct device *dev)
{
        struct platform_device *pdev = to_platform_device(dev);
        struct mdp5_kms *mdp5_kms = platform_get_drvdata(pdev);

        DBG("");

        return mdp5_enable(mdp5_kms);
}

static const struct dev_pm_ops mdp5_pm_ops = {
        SET_RUNTIME_PM_OPS(mdp5_runtime_suspend, mdp5_runtime_resume, NULL)
};

static const struct of_device_id mdp5_dt_match[] = {
        { .compatible = "qcom,mdp5", },
        /* to support downstream DT files */
        { .compatible = "qcom,mdss_mdp", },
        {}
};
MODULE_DEVICE_TABLE(of, mdp5_dt_match);

static struct platform_driver mdp5_driver = {
        .probe = mdp5_dev_probe,
        .remove = mdp5_dev_remove,
        .driver = {
                .name = "msm_mdp",
                .of_match_table = mdp5_dt_match,
                .pm = &mdp5_pm_ops,
        },
};

void __init msm_mdp_register(void)
{
        DBG("");
        platform_driver_register(&mdp5_driver);
}

void __exit msm_mdp_unregister(void)
{
        DBG("");
        platform_driver_unregister(&mdp5_driver);
}