drivers/gpu/drm/sun4i/sun4i_framebuffer.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/sun4i/sun4i_framebuffer.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/sun4i/sun4i_framebuffer.c
Extension
.c
Size
1303 bytes
Lines
53
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
/*
 * Copyright (C) 2015 Free Electrons
 * Copyright (C) 2015 NextThing Co
 *
 * Maxime Ripard <maxime.ripard@free-electrons.com>
 */

#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_blend.h>
#include <drm/drm_gem_framebuffer_helper.h>

#include "sun4i_drv.h"
#include "sun4i_framebuffer.h"

static int sun4i_de_atomic_check(struct drm_device *dev,
				 struct drm_atomic_commit *state)
{
	int ret;

	ret = drm_atomic_helper_check_modeset(dev, state);
	if (ret)
		return ret;

	ret = drm_atomic_normalize_zpos(dev, state);
	if (ret)
		return ret;

	return drm_atomic_helper_check_planes(dev, state);
}

static const struct drm_mode_config_funcs sun4i_de_mode_config_funcs = {
	.atomic_check		= sun4i_de_atomic_check,
	.atomic_commit		= drm_atomic_helper_commit,
	.fb_create		= drm_gem_fb_create,
};

static const struct drm_mode_config_helper_funcs sun4i_de_mode_config_helpers = {
	.atomic_commit_tail	= drm_atomic_helper_commit_tail_rpm,
};

void sun4i_framebuffer_init(struct drm_device *drm)
{
	drm_mode_config_reset(drm);

	drm->mode_config.max_width = 8192;
	drm->mode_config.max_height = 8192;

	drm->mode_config.funcs = &sun4i_de_mode_config_funcs;
	drm->mode_config.helper_private = &sun4i_de_mode_config_helpers;
}

Annotation

Implementation Notes