Release 4.11 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 <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"


#define to_exynos_fb(x)	container_of(x, struct exynos_drm_fb, fb)

/*
 * exynos specific framebuffer structure.
 *
 * @fb: drm framebuffer obejct.
 * @exynos_gem: array of exynos specific gem object containing a gem object.
 */

struct exynos_drm_fb {
	
struct drm_framebuffer	fb;
	
struct exynos_drm_gem	*exynos_gem[MAX_FB_BUFFER];
	
dma_addr_t			dma_addr[MAX_FB_BUFFER];
};



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
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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 void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
{
	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
	unsigned int i;

	drm_framebuffer_cleanup(fb);

	for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem); i++) {
		struct drm_gem_object *obj;

		if (exynos_fb->exynos_gem[i] == NULL)
			continue;

		obj = &exynos_fb->exynos_gem[i]->base;
		drm_gem_object_unreference_unlocked(obj);
	}

	kfree(exynos_fb);
	exynos_fb = NULL;
}

Contributors
Person
Tokens
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CommitProp
Laurent Pinchart
55
59.14%
1
33.33%
Inki Dae
35
37.63%
1
33.33%
Joonyoung Shim
3
3.23%
1
33.33%
Total
93
100.00%
3
100.00%



static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
					struct drm_file *file_priv,
					unsigned int *handle)
{
	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);

	return drm_gem_handle_create(file_priv,
				     &exynos_fb->exynos_gem[0]->base, handle);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Inki Dae
45
91.84%
1
33.33%
Seung-Woo Kim
3
6.12%
1
33.33%
Joonyoung Shim
1
2.04%
1
33.33%
Total
49
100.00%
3
100.00%


static const struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
	.destroy	= exynos_drm_fb_destroy,
	.create_handle	= exynos_drm_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 exynos_drm_fb *exynos_fb;
	int i;
	int ret;

	exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
	if (!exynos_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;

		exynos_fb->exynos_gem[i] = exynos_gem[i];
		exynos_fb->dma_addr[i] = exynos_gem[i]->dma_addr
						+ mode_cmd->offsets[i];
	}

	drm_helper_mode_fill_fb_struct(dev, &exynos_fb->fb, mode_cmd);

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

	return &exynos_fb->fb;

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

Contributors
Person
Tokens
Prop
Commits
CommitProp
Joonyoung Shim
91
46.91%
5
45.45%
Inki Dae
76
39.18%
2
18.18%
Marek Szyprowski
21
10.82%
1
9.09%
Ville Syrjälä
3
1.55%
2
18.18%
Daniel Vetter
3
1.55%
1
9.09%
Total
194
100.00%
11
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)
{
	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 < drm_format_num_planes(mode_cmd->pixel_format); 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);
	}

	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
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CommitProp
Joonyoung Shim
67
39.18%
4
36.36%
Seung-Woo Kim
47
27.49%
1
9.09%
YoungJun Cho
25
14.62%
1
9.09%
Daniel Vetter
24
14.04%
1
9.09%
Inki Dae
7
4.09%
3
27.27%
Ville Syrjälä
1
0.58%
1
9.09%
Total
171
100.00%
11
100.00%



dma_addr_t exynos_drm_fb_dma_addr(struct drm_framebuffer *fb, int index)
{
	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);

	if (index >= MAX_FB_BUFFER)
		return DMA_ERROR_CODE;

	return exynos_fb->dma_addr[index];
}

Contributors
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CommitProp
Inki Dae
21
52.50%
2
50.00%
Seung-Woo Kim
14
35.00%
1
25.00%
Marek Szyprowski
5
12.50%
1
25.00%
Total
40
100.00%
4
100.00%



static void exynos_drm_atomic_commit_tail(struct drm_atomic_state *state)
{
	struct drm_device *dev = state->dev;

	drm_atomic_helper_commit_modeset_disables(dev, state);

	drm_atomic_helper_commit_modeset_enables(dev, state);

	/*
         * Exynos can't update planes with CRTCs and encoders disabled,
         * its updates routines, specially for FIMD, requires the clocks
         * to be enabled. So it is necessary to handle the modeset operations
         * *before* the commit_planes() step, this way it will always
         * have the relevant clocks enabled to perform the update.
         */
	drm_atomic_helper_commit_planes(dev, state,
					DRM_PLANE_COMMIT_ACTIVE_ONLY);

	drm_atomic_helper_commit_hw_done(state);

	drm_atomic_helper_wait_for_vblanks(dev, state);

	drm_atomic_helper_cleanup_planes(dev, state);
}

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Inki Dae
63
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1
100.00%
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63
100.00%
1
100.00%


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


static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
	.fb_create = exynos_user_fb_create,
	.output_poll_changed = exynos_drm_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;
}
Contributors
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Inki Dae
61
100.00%
2
100.00%
Total
61
100.00%
2
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Inki Dae
440
51.40%
7
22.58%
Joonyoung Shim
169
19.74%
7
22.58%
Seung-Woo Kim
77
9.00%
2
6.45%
Laurent Pinchart
56
6.54%
2
6.45%
Marek Szyprowski
32
3.74%
1
3.23%
Daniel Vetter
27
3.15%
1
3.23%
YoungJun Cho
25
2.92%
1
3.23%
Gustavo Fernando Padovan
14
1.64%
2
6.45%
Ville Syrjälä
6
0.70%
4
12.90%
David Howells
4
0.47%
1
3.23%
Andrzej Hajda
3
0.35%
1
3.23%
Shuah Khan
2
0.23%
1
3.23%
Sean Paul
1
0.12%
1
3.23%
Total
856
100.00%
31
100.00%
Directory: drivers/gpu/drm/exynos

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