drivers/gpu/drm/exynos/exynos_drm_crtc.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/exynos/exynos_drm_crtc.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/exynos/exynos_drm_crtc.c
Extension
.c
Size
6332 bytes
Lines
241
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
/* exynos_drm_crtc.c
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 * Authors:
 *	Inki Dae <inki.dae@samsung.com>
 *	Joonyoung Shim <jy0922.shim@samsung.com>
 *	Seung-Woo Kim <sw0312.kim@samsung.com>
 */

#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_encoder.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>

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

static void exynos_drm_crtc_atomic_enable(struct drm_crtc *crtc,
					  struct drm_atomic_commit *state)
{
	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);

	if (exynos_crtc->ops->atomic_enable)
		exynos_crtc->ops->atomic_enable(exynos_crtc);

	drm_crtc_vblank_on(crtc);
}

static void exynos_drm_crtc_atomic_disable(struct drm_crtc *crtc,
					   struct drm_atomic_commit *state)
{
	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);

	drm_crtc_vblank_off(crtc);

	if (exynos_crtc->ops->atomic_disable)
		exynos_crtc->ops->atomic_disable(exynos_crtc);

	spin_lock_irq(&crtc->dev->event_lock);
	if (crtc->state->event && !crtc->state->active) {
		drm_crtc_send_vblank_event(crtc, crtc->state->event);
		crtc->state->event = NULL;
	}
	spin_unlock_irq(&crtc->dev->event_lock);
}

static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
				     struct drm_atomic_commit *state)
{
	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
									  crtc);
	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);

	if (!crtc_state->enable)
		return 0;

	if (exynos_crtc->ops->atomic_check)
		return exynos_crtc->ops->atomic_check(exynos_crtc, crtc_state);

	return 0;
}

static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
				     struct drm_atomic_commit *state)
{
	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);

	if (exynos_crtc->ops->atomic_begin)
		exynos_crtc->ops->atomic_begin(exynos_crtc);
}

static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
				     struct drm_atomic_commit *state)
{
	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);

	if (exynos_crtc->ops->atomic_flush)
		exynos_crtc->ops->atomic_flush(exynos_crtc);
}

static enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc,
	const struct drm_display_mode *mode)
{
	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);

	if (exynos_crtc->ops->mode_valid)
		return exynos_crtc->ops->mode_valid(exynos_crtc, mode);

Annotation

Implementation Notes