Release 4.17 drivers/gpu/drm/exynos/exynos_drm_fb.c

/* exynos_drm_fb.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>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <uapi/drm/exynos_drm.h>

#include "exynos_drm_drv.h"
#include "exynos_drm_fb.h"
#include "exynos_drm_fbdev.h"
#include "exynos_drm_iommu.h"
#include "exynos_drm_crtc.h"



static int check_fb_gem_memory_type(struct drm_device *drm_dev,
				    struct exynos_drm_gem *exynos_gem)
{
	unsigned int flags;

	/*
         * if exynos drm driver supports iommu then framebuffer can use
         * all the buffer types.
         */
	if (is_drm_iommu_supported(drm_dev))
		return 0;

	flags = exynos_gem->flags;

	/*
         * Physically non-contiguous memory type for framebuffer is not
         * supported without IOMMU.
         */
	if (IS_NONCONTIG_BUFFER(flags)) {
		DRM_ERROR("Non-contiguous GEM memory is not supported.\n");
		return -EINVAL;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Inki Dae
54
91.53%
1
33.33%
Joonyoung Shim
3
5.08%
1
33.33%
Shuah Khan
2
3.39%
1
33.33%
Total
59
100.00%
3
100.00%


static const struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
	.destroy	= drm_gem_fb_destroy,
	.create_handle	= drm_gem_fb_create_handle,
};


struct drm_framebuffer *

exynos_drm_framebuffer_init(struct drm_device *dev,
			    const struct drm_mode_fb_cmd2 *mode_cmd,
			    struct exynos_drm_gem **exynos_gem,
			    int count)
{
	struct drm_framebuffer *fb;
	int i;
	int ret;

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

	for (i = 0; i < count; i++) {
		ret = check_fb_gem_memory_type(dev, exynos_gem[i]);
		if (ret < 0)
			goto err;

		fb->obj[i] = &exynos_gem[i]->base;
	}

	drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);

	ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs);
	if (ret < 0) {
		DRM_ERROR("failed to initialize framebuffer\n");
		goto err;
	}

	return fb;

err:
	kfree(fb);
	return ERR_PTR(ret);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Joonyoung Shim
77
46.11%
5
41.67%
Inki Dae
72
43.11%
2
16.67%
Daniel Stone
12
7.19%
2
16.67%
Ville Syrjälä
3
1.80%
2
16.67%
Daniel Vetter
3
1.80%
1
8.33%
Total
167
100.00%
12
100.00%


static struct drm_framebuffer *

exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
		      const struct drm_mode_fb_cmd2 *mode_cmd)
{
	const struct drm_format_info *info = drm_get_format_info(dev, mode_cmd);
	struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
	struct drm_gem_object *obj;
	struct drm_framebuffer *fb;
	int i;
	int ret;

	for (i = 0; i < info->num_planes; i++) {
		unsigned int height = (i == 0) ? mode_cmd->height :
				     DIV_ROUND_UP(mode_cmd->height, info->vsub);
		unsigned long size = height * mode_cmd->pitches[i] +
				     mode_cmd->offsets[i];

		obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]);
		if (!obj) {
			DRM_ERROR("failed to lookup gem object\n");
			ret = -ENOENT;
			goto err;
		}

		exynos_gem[i] = to_exynos_gem(obj);

		if (size > exynos_gem[i]->size) {
			i++;
			ret = -EINVAL;
			goto err;
		}
	}

	fb = exynos_drm_framebuffer_init(dev, mode_cmd, exynos_gem, i);
	if (IS_ERR(fb)) {
		ret = PTR_ERR(fb);
		goto err;
	}

	return fb;

err:
	while (i--)
		drm_gem_object_unreference_unlocked(&exynos_gem[i]->base);

	return ERR_PTR(ret);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marek Szyprowski
84
33.60%
1
7.69%
Seung-Woo Kim
47
18.80%
1
7.69%
Joonyoung Shim
45
18.00%
5
38.46%
YoungJun Cho
25
10.00%
1
7.69%
Inki Dae
24
9.60%
3
23.08%
Daniel Vetter
24
9.60%
1
7.69%
Ville Syrjälä
1
0.40%
1
7.69%
Total
250
100.00%
13
100.00%



dma_addr_t exynos_drm_fb_dma_addr(struct drm_framebuffer *fb, int index)
{
	struct exynos_drm_gem *exynos_gem;

	if (WARN_ON_ONCE(index >= MAX_FB_BUFFER))
		return 0;

	exynos_gem = to_exynos_gem(fb->obj[index]);
	return exynos_gem->dma_addr + fb->offsets[index];
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Stone
19
35.19%
1
16.67%
Seung-Woo Kim
14
25.93%
1
16.67%
Inki Dae
13
24.07%
2
33.33%
Marek Szyprowski
4
7.41%
1
16.67%
Christoph Hellwig
4
7.41%
1
16.67%
Total
54
100.00%
6
100.00%


static struct drm_mode_config_helper_funcs exynos_drm_mode_config_helpers = {
	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
};


static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
	.fb_create = exynos_user_fb_create,
	.output_poll_changed = drm_fb_helper_output_poll_changed,
	.atomic_check = exynos_atomic_check,
	.atomic_commit = drm_atomic_helper_commit,
};



void exynos_drm_mode_config_init(struct drm_device *dev)
{
	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;

	/*
         * set max width and height as default value(4096x4096).
         * this value would be used to check framebuffer size limitation
         * at drm_mode_addfb().
         */
	dev->mode_config.max_width = 4096;
	dev->mode_config.max_height = 4096;

	dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
	dev->mode_config.helper_private = &exynos_drm_mode_config_helpers;

	dev->mode_config.allow_fb_modifiers = true;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Inki Dae
61
88.41%
2
66.67%
Tobias Jakobi
8
11.59%
1
33.33%
Total
69
100.00%
3
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Inki Dae
280
40.17%
7
18.42%
Joonyoung Shim
126
18.08%
7
18.42%
Marek Szyprowski
88
12.63%
2
5.26%
Seung-Woo Kim
70
10.04%
2
5.26%
Daniel Stone
36
5.16%
3
7.89%
Daniel Vetter
27
3.87%
1
2.63%
YoungJun Cho
25
3.59%
1
2.63%
Gustavo Fernando Padovan
14
2.01%
2
5.26%
Tobias Jakobi
8
1.15%
1
2.63%
Ville Syrjälä
6
0.86%
4
10.53%
David Howells
4
0.57%
1
2.63%
Christoph Hellwig
4
0.57%
1
2.63%
Andrzej Hajda
3
0.43%
1
2.63%
Shuah Khan
2
0.29%
1
2.63%
Sean Paul
1
0.14%
1
2.63%
Maxime Ripard
1
0.14%
1
2.63%
Laurent Pinchart
1
0.14%
1
2.63%
Noralf Trönnes
1
0.14%
1
2.63%
Total
697
100.00%
38
100.00%
Directory: drivers/gpu/drm/exynos

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