3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
5 * Inki Dae <inki.dae@samsung.com>
6 * Joonyoung Shim <jy0922.shim@samsung.com>
7 * Seung-Woo Kim <sw0312.kim@samsung.com>
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice (including the next
17 * paragraph) shall be included in all copies or substantial portions of the
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
26 * OTHER DEALINGS IN THE SOFTWARE.
30 #include <drm/drm_crtc.h>
31 #include <drm/drm_crtc_helper.h>
32 #include <drm/drm_fb_helper.h>
33 #include <uapi/drm/exynos_drm.h>
35 #include "exynos_drm_drv.h"
36 #include "exynos_drm_fb.h"
37 #include "exynos_drm_gem.h"
38 #include "exynos_drm_iommu.h"
39 #include "exynos_drm_encoder.h"
41 #define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
44 * exynos specific framebuffer structure.
46 * @fb: drm framebuffer obejct.
47 * @buf_cnt: a buffer count to drm framebuffer.
48 * @exynos_gem_obj: array of exynos specific gem object containing a gem object.
50 struct exynos_drm_fb {
51 struct drm_framebuffer fb;
53 struct exynos_drm_gem_obj *exynos_gem_obj[MAX_FB_BUFFER];
56 static int check_fb_gem_memory_type(struct drm_device *drm_dev,
57 struct exynos_drm_gem_obj *exynos_gem_obj)
62 * if exynos drm driver supports iommu then framebuffer can use
63 * all the buffer types.
65 if (is_drm_iommu_supported(drm_dev))
68 flags = exynos_gem_obj->flags;
71 * without iommu support, not support physically non-continuous memory
74 if (IS_NONCONTIG_BUFFER(flags)) {
75 DRM_ERROR("cannot use this gem memory type for fb.\n");
82 static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
84 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
87 DRM_DEBUG_KMS("%s\n", __FILE__);
89 /* make sure that overlay data are updated before relesing fb. */
90 exynos_drm_encoder_complete_scanout(fb);
92 drm_framebuffer_cleanup(fb);
94 for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem_obj); i++) {
95 struct drm_gem_object *obj;
97 if (exynos_fb->exynos_gem_obj[i] == NULL)
100 obj = &exynos_fb->exynos_gem_obj[i]->base;
101 drm_gem_object_unreference_unlocked(obj);
108 static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
109 struct drm_file *file_priv,
110 unsigned int *handle)
112 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
114 DRM_DEBUG_KMS("%s\n", __FILE__);
116 return drm_gem_handle_create(file_priv,
117 &exynos_fb->exynos_gem_obj[0]->base, handle);
120 static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
121 struct drm_file *file_priv, unsigned flags,
122 unsigned color, struct drm_clip_rect *clips,
125 DRM_DEBUG_KMS("%s\n", __FILE__);
132 static struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
133 .destroy = exynos_drm_fb_destroy,
134 .create_handle = exynos_drm_fb_create_handle,
135 .dirty = exynos_drm_fb_dirty,
138 void exynos_drm_fb_set_buf_cnt(struct drm_framebuffer *fb,
141 struct exynos_drm_fb *exynos_fb;
143 exynos_fb = to_exynos_fb(fb);
145 exynos_fb->buf_cnt = cnt;
148 unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer *fb)
150 struct exynos_drm_fb *exynos_fb;
152 exynos_fb = to_exynos_fb(fb);
154 return exynos_fb->buf_cnt;
157 struct drm_framebuffer *
158 exynos_drm_framebuffer_init(struct drm_device *dev,
159 struct drm_mode_fb_cmd2 *mode_cmd,
160 struct drm_gem_object *obj)
162 struct exynos_drm_fb *exynos_fb;
163 struct exynos_drm_gem_obj *exynos_gem_obj;
166 exynos_gem_obj = to_exynos_gem_obj(obj);
168 ret = check_fb_gem_memory_type(dev, exynos_gem_obj);
170 DRM_ERROR("cannot use this gem memory type for fb.\n");
171 return ERR_PTR(-EINVAL);
174 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
176 DRM_ERROR("failed to allocate exynos drm framebuffer\n");
177 return ERR_PTR(-ENOMEM);
180 drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
181 exynos_fb->exynos_gem_obj[0] = exynos_gem_obj;
183 ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
185 DRM_ERROR("failed to initialize framebuffer\n");
189 return &exynos_fb->fb;
192 static u32 exynos_drm_format_num_buffers(struct drm_mode_fb_cmd2 *mode_cmd)
194 unsigned int cnt = 0;
196 if (mode_cmd->pixel_format != DRM_FORMAT_NV12)
197 return drm_format_num_planes(mode_cmd->pixel_format);
199 while (cnt != MAX_FB_BUFFER) {
200 if (!mode_cmd->handles[cnt])
206 * check if NV12 or NV12M.
209 * handles[0] = base1, offsets[0] = 0
210 * handles[1] = base1, offsets[1] = Y_size
213 * handles[0] = base1, offsets[0] = 0
214 * handles[1] = base2, offsets[1] = 0
218 * in case of NV12 format, offsets[1] is not 0 and
219 * handles[0] is same as handles[1].
221 if (mode_cmd->offsets[1] &&
222 mode_cmd->handles[0] == mode_cmd->handles[1])
229 static struct drm_framebuffer *
230 exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
231 struct drm_mode_fb_cmd2 *mode_cmd)
233 struct drm_gem_object *obj;
234 struct exynos_drm_fb *exynos_fb;
237 DRM_DEBUG_KMS("%s\n", __FILE__);
239 obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
241 DRM_ERROR("failed to lookup gem object\n");
242 return ERR_PTR(-ENOENT);
245 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
247 DRM_ERROR("failed to allocate exynos drm framebuffer\n");
248 return ERR_PTR(-ENOMEM);
251 drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
252 exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj);
253 exynos_fb->buf_cnt = exynos_drm_format_num_buffers(mode_cmd);
255 DRM_DEBUG_KMS("buf_cnt = %d\n", exynos_fb->buf_cnt);
257 for (i = 1; i < exynos_fb->buf_cnt; i++) {
258 struct exynos_drm_gem_obj *exynos_gem_obj;
261 obj = drm_gem_object_lookup(dev, file_priv,
262 mode_cmd->handles[i]);
264 DRM_ERROR("failed to lookup gem object\n");
266 return ERR_PTR(-ENOENT);
269 exynos_gem_obj = to_exynos_gem_obj(obj);
271 ret = check_fb_gem_memory_type(dev, exynos_gem_obj);
273 DRM_ERROR("cannot use this gem memory type for fb.\n");
278 exynos_fb->exynos_gem_obj[i] = to_exynos_gem_obj(obj);
281 ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
283 for (i = 0; i < exynos_fb->buf_cnt; i++) {
284 struct exynos_drm_gem_obj *gem_obj;
286 gem_obj = exynos_fb->exynos_gem_obj[i];
287 drm_gem_object_unreference_unlocked(&gem_obj->base);
294 return &exynos_fb->fb;
297 struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb,
300 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
301 struct exynos_drm_gem_buf *buffer;
303 DRM_DEBUG_KMS("%s\n", __FILE__);
305 if (index >= MAX_FB_BUFFER)
308 buffer = exynos_fb->exynos_gem_obj[index]->buffer;
312 DRM_DEBUG_KMS("dma_addr = 0x%lx\n", (unsigned long)buffer->dma_addr);
317 static void exynos_drm_output_poll_changed(struct drm_device *dev)
319 struct exynos_drm_private *private = dev->dev_private;
320 struct drm_fb_helper *fb_helper = private->fb_helper;
323 drm_fb_helper_hotplug_event(fb_helper);
326 static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
327 .fb_create = exynos_user_fb_create,
328 .output_poll_changed = exynos_drm_output_poll_changed,
331 void exynos_drm_mode_config_init(struct drm_device *dev)
333 dev->mode_config.min_width = 0;
334 dev->mode_config.min_height = 0;
337 * set max width and height as default value(4096x4096).
338 * this value would be used to check framebuffer size limitation
339 * at drm_mode_addfb().
341 dev->mode_config.max_width = 4096;
342 dev->mode_config.max_height = 4096;
344 dev->mode_config.funcs = &exynos_drm_mode_config_funcs;