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v4.6
 
  1/* exynos_drm_fb.c
  2 *
  3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
  4 * Authors:
  5 *	Inki Dae <inki.dae@samsung.com>
  6 *	Joonyoung Shim <jy0922.shim@samsung.com>
  7 *	Seung-Woo Kim <sw0312.kim@samsung.com>
  8 *
  9 * This program is free software; you can redistribute  it and/or modify it
 10 * under  the terms of  the GNU General  Public License as published by the
 11 * Free Software Foundation;  either version 2 of the  License, or (at your
 12 * option) any later version.
 13 */
 14
 15#include <drm/drmP.h>
 16#include <drm/drm_crtc.h>
 17#include <drm/drm_crtc_helper.h>
 18#include <drm/drm_fb_helper.h>
 19#include <drm/drm_atomic.h>
 20#include <drm/drm_atomic_helper.h>
 21#include <uapi/drm/exynos_drm.h>
 
 
 
 
 
 22
 
 23#include "exynos_drm_drv.h"
 24#include "exynos_drm_fb.h"
 25#include "exynos_drm_fbdev.h"
 26#include "exynos_drm_iommu.h"
 27#include "exynos_drm_crtc.h"
 28
 29#define to_exynos_fb(x)	container_of(x, struct exynos_drm_fb, fb)
 30
 31/*
 32 * exynos specific framebuffer structure.
 33 *
 34 * @fb: drm framebuffer obejct.
 35 * @exynos_gem: array of exynos specific gem object containing a gem object.
 36 */
 37struct exynos_drm_fb {
 38	struct drm_framebuffer	fb;
 39	struct exynos_drm_gem	*exynos_gem[MAX_FB_BUFFER];
 40	dma_addr_t			dma_addr[MAX_FB_BUFFER];
 41};
 42
 43static int check_fb_gem_memory_type(struct drm_device *drm_dev,
 44				    struct exynos_drm_gem *exynos_gem)
 45{
 46	unsigned int flags;
 47
 48	/*
 49	 * if exynos drm driver supports iommu then framebuffer can use
 50	 * all the buffer types.
 51	 */
 52	if (is_drm_iommu_supported(drm_dev))
 53		return 0;
 54
 55	flags = exynos_gem->flags;
 56
 57	/*
 58	 * without iommu support, not support physically non-continuous memory
 59	 * for framebuffer.
 60	 */
 61	if (IS_NONCONTIG_BUFFER(flags)) {
 62		DRM_ERROR("cannot use this gem memory type for fb.\n");
 
 63		return -EINVAL;
 64	}
 65
 66	return 0;
 67}
 68
 69static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
 70{
 71	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
 72	unsigned int i;
 73
 74	drm_framebuffer_cleanup(fb);
 75
 76	for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem); i++) {
 77		struct drm_gem_object *obj;
 78
 79		if (exynos_fb->exynos_gem[i] == NULL)
 80			continue;
 81
 82		obj = &exynos_fb->exynos_gem[i]->base;
 83		drm_gem_object_unreference_unlocked(obj);
 84	}
 85
 86	kfree(exynos_fb);
 87	exynos_fb = NULL;
 88}
 89
 90static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
 91					struct drm_file *file_priv,
 92					unsigned int *handle)
 93{
 94	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
 95
 96	return drm_gem_handle_create(file_priv,
 97				     &exynos_fb->exynos_gem[0]->base, handle);
 98}
 99
100static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
101				struct drm_file *file_priv, unsigned flags,
102				unsigned color, struct drm_clip_rect *clips,
103				unsigned num_clips)
104{
105	/* TODO */
106
107	return 0;
108}
109
110static const struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
111	.destroy	= exynos_drm_fb_destroy,
112	.create_handle	= exynos_drm_fb_create_handle,
113	.dirty		= exynos_drm_fb_dirty,
114};
115
116struct drm_framebuffer *
117exynos_drm_framebuffer_init(struct drm_device *dev,
118			    const struct drm_mode_fb_cmd2 *mode_cmd,
119			    struct exynos_drm_gem **exynos_gem,
120			    int count)
121{
122	struct exynos_drm_fb *exynos_fb;
123	int i;
124	int ret;
125
126	exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
127	if (!exynos_fb)
128		return ERR_PTR(-ENOMEM);
129
130	for (i = 0; i < count; i++) {
131		ret = check_fb_gem_memory_type(dev, exynos_gem[i]);
132		if (ret < 0)
133			goto err;
134
135		exynos_fb->exynos_gem[i] = exynos_gem[i];
136		exynos_fb->dma_addr[i] = exynos_gem[i]->dma_addr
137						+ mode_cmd->offsets[i];
138	}
139
140	drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
141
142	ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
143	if (ret < 0) {
144		DRM_ERROR("failed to initialize framebuffer\n");
 
145		goto err;
146	}
147
148	return &exynos_fb->fb;
149
150err:
151	kfree(exynos_fb);
152	return ERR_PTR(ret);
153}
154
155static struct drm_framebuffer *
156exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
157		      const struct drm_mode_fb_cmd2 *mode_cmd)
158{
 
159	struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
160	struct drm_gem_object *obj;
161	struct drm_framebuffer *fb;
162	int i;
163	int ret;
164
165	for (i = 0; i < drm_format_num_planes(mode_cmd->pixel_format); i++) {
166		obj = drm_gem_object_lookup(dev, file_priv,
167					    mode_cmd->handles[i]);
168		if (!obj) {
169			DRM_ERROR("failed to lookup gem object\n");
 
 
 
 
 
 
170			ret = -ENOENT;
171			goto err;
172		}
173
174		exynos_gem[i] = to_exynos_gem(obj);
 
 
 
 
175	}
176
177	fb = exynos_drm_framebuffer_init(dev, mode_cmd, exynos_gem, i);
178	if (IS_ERR(fb)) {
179		ret = PTR_ERR(fb);
180		goto err;
181	}
182
183	return fb;
184
185err:
186	while (i--)
187		drm_gem_object_unreference_unlocked(&exynos_gem[i]->base);
188
189	return ERR_PTR(ret);
190}
191
192dma_addr_t exynos_drm_fb_dma_addr(struct drm_framebuffer *fb, int index)
193{
194	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
195
196	if (index >= MAX_FB_BUFFER)
197		return DMA_ERROR_CODE;
198
199	return exynos_fb->dma_addr[index];
 
200}
201
 
 
 
 
202static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
203	.fb_create = exynos_user_fb_create,
204	.output_poll_changed = exynos_drm_output_poll_changed,
205	.atomic_check = drm_atomic_helper_check,
206	.atomic_commit = exynos_atomic_commit,
207};
208
209void exynos_drm_mode_config_init(struct drm_device *dev)
210{
211	dev->mode_config.min_width = 0;
212	dev->mode_config.min_height = 0;
213
214	/*
215	 * set max width and height as default value(4096x4096).
216	 * this value would be used to check framebuffer size limitation
217	 * at drm_mode_addfb().
218	 */
219	dev->mode_config.max_width = 4096;
220	dev->mode_config.max_height = 4096;
221
222	dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
 
 
 
223}
v5.14.15
  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/* exynos_drm_fb.c
  3 *
  4 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
  5 * Authors:
  6 *	Inki Dae <inki.dae@samsung.com>
  7 *	Joonyoung Shim <jy0922.shim@samsung.com>
  8 *	Seung-Woo Kim <sw0312.kim@samsung.com>
 
 
 
 
 
  9 */
 10
 
 
 
 
 11#include <drm/drm_atomic.h>
 12#include <drm/drm_atomic_helper.h>
 13#include <drm/drm_crtc.h>
 14#include <drm/drm_fb_helper.h>
 15#include <drm/drm_fourcc.h>
 16#include <drm/drm_gem_framebuffer_helper.h>
 17#include <drm/drm_probe_helper.h>
 18#include <drm/exynos_drm.h>
 19
 20#include "exynos_drm_crtc.h"
 21#include "exynos_drm_drv.h"
 22#include "exynos_drm_fb.h"
 23#include "exynos_drm_fbdev.h"
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 24
 25static int check_fb_gem_memory_type(struct drm_device *drm_dev,
 26				    struct exynos_drm_gem *exynos_gem)
 27{
 28	unsigned int flags;
 29
 30	/*
 31	 * if exynos drm driver supports iommu then framebuffer can use
 32	 * all the buffer types.
 33	 */
 34	if (is_drm_iommu_supported(drm_dev))
 35		return 0;
 36
 37	flags = exynos_gem->flags;
 38
 39	/*
 40	 * Physically non-contiguous memory type for framebuffer is not
 41	 * supported without IOMMU.
 42	 */
 43	if (IS_NONCONTIG_BUFFER(flags)) {
 44		DRM_DEV_ERROR(drm_dev->dev,
 45			      "Non-contiguous GEM memory is not supported.\n");
 46		return -EINVAL;
 47	}
 48
 49	return 0;
 50}
 51
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 52static const struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
 53	.destroy	= drm_gem_fb_destroy,
 54	.create_handle	= drm_gem_fb_create_handle,
 
 55};
 56
 57struct drm_framebuffer *
 58exynos_drm_framebuffer_init(struct drm_device *dev,
 59			    const struct drm_mode_fb_cmd2 *mode_cmd,
 60			    struct exynos_drm_gem **exynos_gem,
 61			    int count)
 62{
 63	struct drm_framebuffer *fb;
 64	int i;
 65	int ret;
 66
 67	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 68	if (!fb)
 69		return ERR_PTR(-ENOMEM);
 70
 71	for (i = 0; i < count; i++) {
 72		ret = check_fb_gem_memory_type(dev, exynos_gem[i]);
 73		if (ret < 0)
 74			goto err;
 75
 76		fb->obj[i] = &exynos_gem[i]->base;
 
 
 77	}
 78
 79	drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
 80
 81	ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs);
 82	if (ret < 0) {
 83		DRM_DEV_ERROR(dev->dev,
 84			      "failed to initialize framebuffer\n");
 85		goto err;
 86	}
 87
 88	return fb;
 89
 90err:
 91	kfree(fb);
 92	return ERR_PTR(ret);
 93}
 94
 95static struct drm_framebuffer *
 96exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
 97		      const struct drm_mode_fb_cmd2 *mode_cmd)
 98{
 99	const struct drm_format_info *info = drm_get_format_info(dev, mode_cmd);
100	struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
 
101	struct drm_framebuffer *fb;
102	int i;
103	int ret;
104
105	for (i = 0; i < info->num_planes; i++) {
106		unsigned int height = (i == 0) ? mode_cmd->height :
107				     DIV_ROUND_UP(mode_cmd->height, info->vsub);
108		unsigned long size = height * mode_cmd->pitches[i] +
109				     mode_cmd->offsets[i];
110
111		exynos_gem[i] = exynos_drm_gem_get(file_priv,
112						   mode_cmd->handles[i]);
113		if (!exynos_gem[i]) {
114			DRM_DEV_ERROR(dev->dev,
115				      "failed to lookup gem object\n");
116			ret = -ENOENT;
117			goto err;
118		}
119
120		if (size > exynos_gem[i]->size) {
121			i++;
122			ret = -EINVAL;
123			goto err;
124		}
125	}
126
127	fb = exynos_drm_framebuffer_init(dev, mode_cmd, exynos_gem, i);
128	if (IS_ERR(fb)) {
129		ret = PTR_ERR(fb);
130		goto err;
131	}
132
133	return fb;
134
135err:
136	while (i--)
137		exynos_drm_gem_put(exynos_gem[i]);
138
139	return ERR_PTR(ret);
140}
141
142dma_addr_t exynos_drm_fb_dma_addr(struct drm_framebuffer *fb, int index)
143{
144	struct exynos_drm_gem *exynos_gem;
145
146	if (WARN_ON_ONCE(index >= MAX_FB_BUFFER))
147		return 0;
148
149	exynos_gem = to_exynos_gem(fb->obj[index]);
150	return exynos_gem->dma_addr + fb->offsets[index];
151}
152
153static struct drm_mode_config_helper_funcs exynos_drm_mode_config_helpers = {
154	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
155};
156
157static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
158	.fb_create = exynos_user_fb_create,
159	.output_poll_changed = drm_fb_helper_output_poll_changed,
160	.atomic_check = drm_atomic_helper_check,
161	.atomic_commit = drm_atomic_helper_commit,
162};
163
164void exynos_drm_mode_config_init(struct drm_device *dev)
165{
166	dev->mode_config.min_width = 0;
167	dev->mode_config.min_height = 0;
168
169	/*
170	 * set max width and height as default value(4096x4096).
171	 * this value would be used to check framebuffer size limitation
172	 * at drm_mode_addfb().
173	 */
174	dev->mode_config.max_width = 4096;
175	dev->mode_config.max_height = 4096;
176
177	dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
178	dev->mode_config.helper_private = &exynos_drm_mode_config_helpers;
179
180	dev->mode_config.normalize_zpos = true;
181}