path: root/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c

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

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

#include "mdp5_kms.h"

#define CURSOR_WIDTH	64
#define CURSOR_HEIGHT	64

struct mdp5_crtc {
	struct drm_crtc base;
	int id;
	bool enabled;

	spinlock_t lm_lock;     /* protect REG_MDP5_LM_* registers */

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

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

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

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

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

	struct completion pp_completion;

	bool lm_cursor_enabled;

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

		/* current cursor being scanned out: */
		struct drm_gem_object *scanout_bo;
		uint64_t iova;
		uint32_t width, height;
		uint32_t x, y;
	} cursor;
};
#define to_mdp5_crtc(x) container_of(x, struct mdp5_crtc, base)

static void mdp5_crtc_restore_cursor(struct drm_crtc *crtc);

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

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

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

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

static u32 crtc_flush(struct drm_crtc *crtc, u32 flush_mask)
{
	struct mdp5_crtc_state *mdp5_cstate = to_mdp5_crtc_state(crtc->state);
	struct mdp5_ctl *ctl = mdp5_cstate->ctl;
	struct mdp5_pipeline *pipeline = &mdp5_cstate->pipeline;
	bool start = !mdp5_cstate->defer_start;

	mdp5_cstate->defer_start = false;

	DBG("%s: flush=%08x", crtc->name, flush_mask);

	return mdp5_ctl_commit(ctl, pipeline, flush_mask, start);
}

/*
 * flush updates, to make sure hw is updated to new scanout fb,
 * so that we can safely queue unref to current fb (ie. next
 * vblank we know hw is done w/ previous scanout_fb).
 */
static u32 crtc_flush_all(struct drm_crtc *crtc)
{
	struct mdp5_crtc_state *mdp5_cstate = to_mdp5_crtc_state(crtc->state);
	struct mdp5_hw_mixer *mixer, *r_mixer;
	struct drm_plane *plane;
	uint32_t flush_mask = 0;

	/* this should not happen: */
	if (WARN_ON(!mdp5_cstate->ctl))
		return 0;

	drm_atomic_crtc_for_each_plane(plane, crtc) {
		if (!plane->state->visible)
			continue;
		flush_mask |= mdp5_plane_get_flush(plane);
	}

	mixer = mdp5_cstate->pipeline.mixer;
	flush_mask |= mdp_ctl_flush_mask_lm(mixer->lm);

	r_mixer = mdp5_cstate->pipeline.r_mixer;
	if (r_mixer)
		flush_mask |= mdp_ctl_flush_mask_lm(r_mixer->lm);

	return crtc_flush(crtc, flush_mask);
}

/* if file!=NULL, this is preclose potential cancel-flip path */
static void complete_flip(struct drm_crtc *