path: root/drivers/gpu/drm/i915/display/intel_atomic_plane.c

/*
 * Copyright © 2014 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

/**
 * DOC: atomic plane helpers
 *
 * The functions here are used by the atomic plane helper functions to
 * implement legacy plane updates (i.e., drm_plane->update_plane() and
 * drm_plane->disable_plane()).  This allows plane updates to use the
 * atomic state infrastructure and perform plane updates as separate
 * prepare/check/commit/cleanup steps.
 */

#include <linux/dma-fence-chain.h>
#include <linux/dma-resv.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_blend.h>
#include <drm/drm_fourcc.h>

#include "i915_config.h"
#include "i9xx_plane_regs.h"
#include "intel_atomic_plane.h"
#include "intel_cdclk.h"
#include "intel_cursor.h"
#include "intel_display_rps.h"
#include "intel_display_trace.h"
#include "intel_display_types.h"
#include "intel_fb.h"
#include "intel_fb_pin.h"
#include "skl_scaler.h"
#include "skl_watermark.h"

static void intel_plane_state_reset(struct intel_plane_state *plane_state,
				    struct intel_plane *plane)
{
	memset(plane_state, 0, sizeof(*plane_state));

	__drm_atomic_helper_plane_state_reset(&plane_state->uapi, &plane->base);

	plane_state->scaler_id = -1;
}

struct intel_plane *intel_plane_alloc(void)
{
	struct intel_plane_state *plane_state;
	struct intel_plane *plane;

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

	plane_state = kzalloc(sizeof(*plane_state), GFP_KERNEL);
	if (!plane_state) {
		kfree(plane);
		return ERR_PTR(-ENOMEM);
	}

	intel_plane_state_reset(plane_state, plane);

	plane->base.state = &plane_state->uapi;

	return plane;
}

void intel_plane_free(struct intel_plane *plane)
{
	intel_plane_destroy_state(&plane->base, plane->base.state);
	kfree(plane);
}

/**
 * intel_plane_duplicate_state - duplicate plane state
 * @plane: drm plane
 *
 * Allocates and returns a copy of the plane state (both common and
 * Intel-specific) for the specified plane.
 *
 * Returns: The newly allocated plane state, or NULL on failure.
 */
struct drm_plane_state *
intel_plane_duplicate_state(struct drm_plane *plane)
{
	struct intel_plane_state *intel_state;

	intel_state = to_intel_plane_state(plane->state);
	intel_state = kmemdup(intel_state, sizeof(*intel_state), GFP_KERNEL);

	if (!intel_state)
		return NULL;

	__drm_atomic_helper_plane_duplicate_state(plane, &intel_state->uapi);

	intel_state->ggtt_vma = NULL;
	intel_state->dpt_vma = NULL;
	intel_state->flags = 0;

	/* add reference to fb */
	if (intel_state->hw.fb)
		drm_framebuffer_get(intel_state->hw.fb);

	return &intel_state->uapi;
}

/**
 * intel_plane_destroy_state - destroy plane state
 * @plane: drm plane
 * @state: state object to destroy
 *
 * Destroys the plane state (both common and Intel-specific) for the
 * specified plane.
 */
void
intel_plane_destroy_state(struct drm_plane *plane,
			  struct drm_plane_state *state)
{
	struct intel_plane_state *plane_state = to_intel_plane_state(state);

	drm_WARN_ON(plane->dev, plane_state->ggtt_vma);
	drm_WARN_ON(plane->dev, plane_state->dpt_vma);

	__drm_atomic_helper_plane_destroy_state(&plane_state->uapi);
	if (plane_state->hw.fb)
		drm_framebuffer_put(<