Release 4.11 drivers/gpu/drm/exynos/exynos_drm_fbdev.c

/* exynos_drm_fbdev.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_fb_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/exynos_drm.h>

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


#define MAX_CONNECTOR		4

#define PREFERRED_BPP		32


#define to_exynos_fbdev(x)	container_of(x, struct exynos_drm_fbdev,\
                                drm_fb_helper)


struct exynos_drm_fbdev {
	
struct drm_fb_helper	drm_fb_helper;
	
struct exynos_drm_gem	*exynos_gem;
};



static int exynos_drm_fb_mmap(struct fb_info *info,
			struct vm_area_struct *vma)
{
	struct drm_fb_helper *helper = info->par;
	struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(helper);
	struct exynos_drm_gem *exynos_gem = exynos_fbd->exynos_gem;
	unsigned long vm_size;
	int ret;

	vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;

	vm_size = vma->vm_end - vma->vm_start;

	if (vm_size > exynos_gem->size)
		return -EINVAL;

	ret = dma_mmap_attrs(to_dma_dev(helper->dev), vma, exynos_gem->cookie,
			     exynos_gem->dma_addr, exynos_gem->size,
			     exynos_gem->dma_attrs);
	if (ret < 0) {
		DRM_ERROR("failed to mmap.\n");
		return ret;
	}

	return 0;
}

Contributors
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CommitProp
Prathyush K
120
90.91%
1
25.00%
Joonyoung Shim
8
6.06%
1
25.00%
Marek Szyprowski
4
3.03%
2
50.00%
Total
132
100.00%
4
100.00%


static struct fb_ops exynos_drm_fb_ops = {
	.owner		= THIS_MODULE,
	DRM_FB_HELPER_DEFAULT_OPS,
	.fb_mmap        = exynos_drm_fb_mmap,
	.fb_fillrect	= drm_fb_helper_cfb_fillrect,
	.fb_copyarea	= drm_fb_helper_cfb_copyarea,
	.fb_imageblit	= drm_fb_helper_cfb_imageblit,
};



static int exynos_drm_fbdev_update(struct drm_fb_helper *helper,
				   struct drm_fb_helper_surface_size *sizes,
				   struct exynos_drm_gem *exynos_gem)
{
	struct fb_info *fbi;
	struct drm_framebuffer *fb = helper->fb;
	unsigned int size = fb->width * fb->height * fb->format->cpp[0];
	unsigned int nr_pages;
	unsigned long offset;

	fbi = drm_fb_helper_alloc_fbi(helper);
	if (IS_ERR(fbi)) {
		DRM_ERROR("failed to allocate fb info.\n");
		return PTR_ERR(fbi);
	}

	fbi->par = helper;
	fbi->flags = FBINFO_FLAG_DEFAULT;
	fbi->fbops = &exynos_drm_fb_ops;

	drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->format->depth);
	drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height);

	nr_pages = exynos_gem->size >> PAGE_SHIFT;

	exynos_gem->kvaddr = (void __iomem *) vmap(exynos_gem->pages, nr_pages,
				VM_MAP, pgprot_writecombine(PAGE_KERNEL));
	if (!exynos_gem->kvaddr) {
		DRM_ERROR("failed to map pages to kernel space.\n");
		drm_fb_helper_release_fbi(helper);
		return -EIO;
	}

	offset = fbi->var.xoffset * fb->format->cpp[0];
	offset += fbi->var.yoffset * fb->pitches[0];

	fbi->screen_base = exynos_gem->kvaddr + offset;
	fbi->screen_size = size;
	fbi->fix.smem_len = size;

	return 0;
}

Contributors
Person
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CommitProp
Inki Dae
136
52.71%
4
26.67%
Joonyoung Shim
64
24.81%
3
20.00%
Ville Syrjälä
22
8.53%
3
20.00%
Rob Clark
9
3.49%
1
6.67%
Seung-Woo Kim
8
3.10%
1
6.67%
Daniel Kurtz
8
3.10%
1
6.67%
Carlo Caione
6
2.33%
1
6.67%
Sachin Kamat
5
1.94%
1
6.67%
Total
258
100.00%
15
100.00%



static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
				    struct drm_fb_helper_surface_size *sizes)
{
	struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
	struct exynos_drm_gem *exynos_gem;
	struct drm_device *dev = helper->dev;
	struct drm_mode_fb_cmd2 mode_cmd = { 0 };
	struct platform_device *pdev = dev->platformdev;
	unsigned long size;
	int ret;

	DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n",
			sizes->surface_width, sizes->surface_height,
			sizes->surface_bpp);

	mode_cmd.width = sizes->surface_width;
	mode_cmd.height = sizes->surface_height;
	mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3);
	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
							  sizes->surface_depth);

	size = mode_cmd.pitches[0] * mode_cmd.height;

	exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_CONTIG, size);
	/*
         * If physically contiguous memory allocation fails and if IOMMU is
         * supported then try to get buffer from non physically contiguous
         * memory area.
         */
	if (IS_ERR(exynos_gem) && is_drm_iommu_supported(dev)) {
		dev_warn(&pdev->dev, "contiguous FB allocation failed, falling back to non-contiguous\n");
		exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_NONCONTIG,
						   size);
	}

	if (IS_ERR(exynos_gem))
		return PTR_ERR(exynos_gem);

	exynos_fbdev->exynos_gem = exynos_gem;

	helper->fb =
		exynos_drm_framebuffer_init(dev, &mode_cmd, &exynos_gem, 1);
	if (IS_ERR(helper->fb)) {
		DRM_ERROR("failed to create drm framebuffer.\n");
		ret = PTR_ERR(helper->fb);
		goto err_destroy_gem;
	}

	ret = exynos_drm_fbdev_update(helper, sizes, exynos_gem);
	if (ret < 0)
		goto err_destroy_framebuffer;

	return ret;

err_destroy_framebuffer:
	drm_framebuffer_cleanup(helper->fb);
err_destroy_gem:
	exynos_drm_gem_destroy(exynos_gem);

	/*
         * if failed, all resources allocated above would be released by
         * drm_mode_config_cleanup() when drm_load() had been called prior
         * to any specific driver such as fimd or hdmi driver.
         */

	return ret;
}

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Inki Dae
175
58.72%
4
30.77%
Joonyoung Shim
81
27.18%
4
30.77%
Vikas Sajjan
35
11.74%
1
7.69%
Daniel Vetter
3
1.01%
1
7.69%
Rob Clark
2
0.67%
1
7.69%
Sachin Kamat
1
0.34%
1
7.69%
Archit Taneja
1
0.34%
1
7.69%
Total
298
100.00%
13
100.00%


static const struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
	.fb_probe =	exynos_drm_fbdev_create,
};



static bool exynos_drm_fbdev_is_anything_connected(struct drm_device *dev)
{
	struct drm_connector *connector;
	bool ret = false;

	mutex_lock(&dev->mode_config.mutex);
	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
		if (connector->status != connector_status_connected)
			continue;

		ret = true;
		break;
	}
	mutex_unlock(&dev->mode_config.mutex);

	return ret;
}

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Andrzej Hajda
67
98.53%
1
50.00%
Jingoo Han
1
1.47%
1
50.00%
Total
68
100.00%
2
100.00%



int exynos_drm_fbdev_init(struct drm_device *dev)
{
	struct exynos_drm_fbdev *fbdev;
	struct exynos_drm_private *private = dev->dev_private;
	struct drm_fb_helper *helper;
	int ret;

	if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)
		return 0;

	if (!exynos_drm_fbdev_is_anything_connected(dev))
		return 0;

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

	private->fb_helper = helper = &fbdev->drm_fb_helper;

	drm_fb_helper_prepare(dev, helper, &exynos_drm_fb_helper_funcs);

	ret = drm_fb_helper_init(dev, helper, MAX_CONNECTOR);
	if (ret < 0) {
		DRM_ERROR("failed to initialize drm fb helper.\n");
		goto err_init;
	}

	ret = drm_fb_helper_single_add_all_connectors(helper);
	if (ret < 0) {
		DRM_ERROR("failed to register drm_fb_helper_connector.\n");
		goto err_setup;

	}

	ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
	if (ret < 0) {
		DRM_ERROR("failed to set up hw configuration.\n");
		goto err_setup;
	}

	return 0;

err_setup:
	drm_fb_helper_fini(helper);

err_init:
	private->fb_helper = NULL;
	kfree(fbdev);

	return ret;
}

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Inki Dae
189
91.75%
1
33.33%
Andrzej Hajda
11
5.34%
1
33.33%
Thierry Reding
6
2.91%
1
33.33%
Total
206
100.00%
3
100.00%



static void exynos_drm_fbdev_destroy(struct drm_device *dev,
				      struct drm_fb_helper *fb_helper)
{
	struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(fb_helper);
	struct exynos_drm_gem *exynos_gem = exynos_fbd->exynos_gem;
	struct drm_framebuffer *fb;

	vunmap(exynos_gem->kvaddr);

	/* release drm framebuffer and real buffer */
	if (fb_helper->fb && fb_helper->fb->funcs) {
		fb = fb_helper->fb;
		if (fb)
			drm_framebuffer_remove(fb);
	}

	drm_fb_helper_unregister_fbi(fb_helper);
	drm_fb_helper_release_fbi(fb_helper);

	drm_fb_helper_fini(fb_helper);
}

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Inki Dae
83
90.22%
2
40.00%
Archit Taneja
4
4.35%
1
20.00%
Joonyoung Shim
4
4.35%
1
20.00%
Rob Clark
1
1.09%
1
20.00%
Total
92
100.00%
5
100.00%



void exynos_drm_fbdev_fini(struct drm_device *dev)
{
	struct exynos_drm_private *private = dev->dev_private;
	struct exynos_drm_fbdev *fbdev;

	if (!private || !private->fb_helper)
		return;

	fbdev = to_exynos_fbdev(private->fb_helper);

	exynos_drm_fbdev_destroy(dev, private->fb_helper);
	kfree(fbdev);
	private->fb_helper = NULL;
}

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64
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64
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1
100.00%



void exynos_drm_fbdev_restore_mode(struct drm_device *dev)
{
	struct exynos_drm_private *private = dev->dev_private;

	if (!private || !private->fb_helper)
		return;

	drm_fb_helper_restore_fbdev_mode_unlocked(private->fb_helper);
}

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Inki Dae
36
97.30%
1
50.00%
Rob Clark
1
2.70%
1
50.00%
Total
37
100.00%
2
100.00%



void exynos_drm_output_poll_changed(struct drm_device *dev)
{
	struct exynos_drm_private *private = dev->dev_private;
	struct drm_fb_helper *fb_helper = private->fb_helper;

	if (fb_helper)
		drm_fb_helper_hotplug_event(fb_helper);
	else
		exynos_drm_fbdev_init(dev);
}
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Andrzej Hajda
43
100.00%
1
100.00%
Total
43
100.00%
1
100.00%

Overall Contributors
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Tokens
Prop
Commits
CommitProp
Inki Dae
763
58.60%
8
20.00%
Joonyoung Shim
159
12.21%
6
15.00%
Prathyush K
125
9.60%
1
2.50%
Andrzej Hajda
121
9.29%
2
5.00%
Vikas Sajjan
38
2.92%
1
2.50%
Ville Syrjälä
22
1.69%
3
7.50%
Rob Clark
13
1.00%
3
7.50%
Archit Taneja
8
0.61%
1
2.50%
Seung-Woo Kim
8
0.61%
1
2.50%
Daniel Kurtz
8
0.61%
1
2.50%
Thierry Reding
7
0.54%
2
5.00%
Sachin Kamat
6
0.46%
2
5.00%
Carlo Caione
6
0.46%
1
2.50%
David Howells
4
0.31%
1
2.50%
Daniel Vetter
4
0.31%
2
5.00%
Marek Szyprowski
4
0.31%
2
5.00%
Mark Brown
3
0.23%
1
2.50%
Stefan Christ
2
0.15%
1
2.50%
Jingoo Han
1
0.08%
1
2.50%
Total
1302
100.00%
40
100.00%
Directory: drivers/gpu/drm/exynos

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