linux/drivers/gpu/drm/exynos/exynos_drm_plane.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2011 Samsung Electronics Co.Ltd
 * Authors: Joonyoung Shim <[email protected]>
 */


#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_blend.h>
#include <drm/drm_framebuffer.h>
#include <drm/exynos_drm.h>

#include "exynos_drm_crtc.h"
#include "exynos_drm_drv.h"
#include "exynos_drm_fb.h"
#include "exynos_drm_gem.h"
#include "exynos_drm_plane.h"

/*
 * This function is to get X or Y size shown via screen. This needs length and
 * start position of CRTC.
 *
 *      <--- length --->
 * CRTC ----------------
 *      ^ start        ^ end
 *
 * There are six cases from a to f.
 *
 *             <----- SCREEN ----->
 *             0                 last
 *   ----------|------------------|----------
 * CRTCs
 * a -------
 *        b -------
 *        c --------------------------
 *                 d --------
 *                           e -------
 *                                  f -------
 */
static int exynos_plane_get_size(int start, unsigned length, unsigned last)
{ … }

static void exynos_plane_mode_set(struct exynos_drm_plane_state *exynos_state)
{ … }

static void exynos_drm_plane_reset(struct drm_plane *plane)
{ … }

static struct drm_plane_state *
exynos_drm_plane_duplicate_state(struct drm_plane *plane)
{ … }

static void exynos_drm_plane_destroy_state(struct drm_plane *plane,
					   struct drm_plane_state *old_state)
{ … }

static struct drm_plane_funcs exynos_plane_funcs = …;

static int
exynos_drm_plane_check_format(const struct exynos_drm_plane_config *config,
			      struct exynos_drm_plane_state *state)
{ … }

static int
exynos_drm_plane_check_size(const struct exynos_drm_plane_config *config,
			    struct exynos_drm_plane_state *state)
{ … }

static int exynos_plane_atomic_check(struct drm_plane *plane,
				     struct drm_atomic_state *state)
{ … }

static void exynos_plane_atomic_update(struct drm_plane *plane,
				       struct drm_atomic_state *state)
{ … }

static void exynos_plane_atomic_disable(struct drm_plane *plane,
					struct drm_atomic_state *state)
{ … }

static const struct drm_plane_helper_funcs plane_helper_funcs = …;

static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
					      int zpos, bool immutable)
{ … }

int exynos_plane_init(struct drm_device *dev,
		      struct exynos_drm_plane *exynos_plane, unsigned int index,
		      const struct exynos_drm_plane_config *config)
{ … }