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 * 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.
16 #include <drm/drm_crtc.h>
17 #include <drm/drm_crtc_helper.h>
18 #include <drm/drm_fb_helper.h>
19 #include <uapi/drm/exynos_drm.h>
21 #include "exynos_drm_drv.h"
22 #include "exynos_drm_fb.h"
23 #include "exynos_drm_fbdev.h"
24 #include "exynos_drm_gem.h"
25 #include "exynos_drm_iommu.h"
26 #include "exynos_drm_crtc.h"
28 #define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
31 * exynos specific framebuffer structure.
33 * @fb: drm framebuffer obejct.
34 * @buf_cnt: a buffer count to drm framebuffer.
35 * @exynos_gem_obj: array of exynos specific gem object containing a gem object.
37 struct exynos_drm_fb {
38 struct drm_framebuffer fb;
40 struct exynos_drm_gem_obj *exynos_gem_obj[MAX_FB_BUFFER];
43 static int check_fb_gem_memory_type(struct drm_device *drm_dev,
44 struct exynos_drm_gem_obj *exynos_gem_obj)
49 * if exynos drm driver supports iommu then framebuffer can use
50 * all the buffer types.
52 if (is_drm_iommu_supported(drm_dev))
55 flags = exynos_gem_obj->flags;
58 * without iommu support, not support physically non-continuous memory
61 if (IS_NONCONTIG_BUFFER(flags)) {
62 DRM_ERROR("cannot use this gem memory type for fb.\n");
69 static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
71 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
74 /* make sure that overlay data are updated before relesing fb. */
75 exynos_drm_crtc_complete_scanout(fb);
77 drm_framebuffer_cleanup(fb);
79 for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem_obj); i++) {
80 struct drm_gem_object *obj;
82 if (exynos_fb->exynos_gem_obj[i] == NULL)
85 obj = &exynos_fb->exynos_gem_obj[i]->base;
86 drm_gem_object_unreference_unlocked(obj);
93 static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
94 struct drm_file *file_priv,
97 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
99 /* This fb should have only one gem object. */
100 if (WARN_ON(exynos_fb->buf_cnt != 1))
103 return drm_gem_handle_create(file_priv,
104 &exynos_fb->exynos_gem_obj[0]->base, handle);
107 static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
108 struct drm_file *file_priv, unsigned flags,
109 unsigned color, struct drm_clip_rect *clips,
117 static struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
118 .destroy = exynos_drm_fb_destroy,
119 .create_handle = exynos_drm_fb_create_handle,
120 .dirty = exynos_drm_fb_dirty,
123 void exynos_drm_fb_set_buf_cnt(struct drm_framebuffer *fb,
126 struct exynos_drm_fb *exynos_fb;
128 exynos_fb = to_exynos_fb(fb);
130 exynos_fb->buf_cnt = cnt;
133 unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer *fb)
135 struct exynos_drm_fb *exynos_fb;
137 exynos_fb = to_exynos_fb(fb);
139 return exynos_fb->buf_cnt;
142 struct drm_framebuffer *
143 exynos_drm_framebuffer_init(struct drm_device *dev,
144 struct drm_mode_fb_cmd2 *mode_cmd,
145 struct drm_gem_object *obj)
147 struct exynos_drm_fb *exynos_fb;
148 struct exynos_drm_gem_obj *exynos_gem_obj;
151 exynos_gem_obj = to_exynos_gem_obj(obj);
153 ret = check_fb_gem_memory_type(dev, exynos_gem_obj);
155 DRM_ERROR("cannot use this gem memory type for fb.\n");
156 return ERR_PTR(-EINVAL);
159 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
161 return ERR_PTR(-ENOMEM);
163 drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
164 exynos_fb->exynos_gem_obj[0] = exynos_gem_obj;
166 ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
168 DRM_ERROR("failed to initialize framebuffer\n");
172 return &exynos_fb->fb;
175 static u32 exynos_drm_format_num_buffers(struct drm_mode_fb_cmd2 *mode_cmd)
177 unsigned int cnt = 0;
179 if (mode_cmd->pixel_format != DRM_FORMAT_NV12)
180 return drm_format_num_planes(mode_cmd->pixel_format);
182 while (cnt != MAX_FB_BUFFER) {
183 if (!mode_cmd->handles[cnt])
189 * check if NV12 or NV12M.
192 * handles[0] = base1, offsets[0] = 0
193 * handles[1] = base1, offsets[1] = Y_size
196 * handles[0] = base1, offsets[0] = 0
197 * handles[1] = base2, offsets[1] = 0
201 * in case of NV12 format, offsets[1] is not 0 and
202 * handles[0] is same as handles[1].
204 if (mode_cmd->offsets[1] &&
205 mode_cmd->handles[0] == mode_cmd->handles[1])
212 static struct drm_framebuffer *
213 exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
214 struct drm_mode_fb_cmd2 *mode_cmd)
216 struct drm_gem_object *obj;
217 struct exynos_drm_gem_obj *exynos_gem_obj;
218 struct exynos_drm_fb *exynos_fb;
221 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
223 return ERR_PTR(-ENOMEM);
225 obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
227 DRM_ERROR("failed to lookup gem object\n");
232 drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
233 exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj);
234 exynos_fb->buf_cnt = exynos_drm_format_num_buffers(mode_cmd);
236 DRM_DEBUG_KMS("buf_cnt = %d\n", exynos_fb->buf_cnt);
238 for (i = 1; i < exynos_fb->buf_cnt; i++) {
239 obj = drm_gem_object_lookup(dev, file_priv,
240 mode_cmd->handles[i]);
242 DRM_ERROR("failed to lookup gem object\n");
244 exynos_fb->buf_cnt = i;
245 goto err_unreference;
248 exynos_gem_obj = to_exynos_gem_obj(obj);
249 exynos_fb->exynos_gem_obj[i] = exynos_gem_obj;
251 ret = check_fb_gem_memory_type(dev, exynos_gem_obj);
253 DRM_ERROR("cannot use this gem memory type for fb.\n");
254 goto err_unreference;
258 ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
260 DRM_ERROR("failed to init framebuffer.\n");
261 goto err_unreference;
264 return &exynos_fb->fb;
267 for (i = 0; i < exynos_fb->buf_cnt; i++) {
268 struct drm_gem_object *obj;
270 obj = &exynos_fb->exynos_gem_obj[i]->base;
272 drm_gem_object_unreference_unlocked(obj);
279 struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb,
282 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
283 struct exynos_drm_gem_buf *buffer;
285 if (index >= MAX_FB_BUFFER)
288 buffer = exynos_fb->exynos_gem_obj[index]->buffer;
292 DRM_DEBUG_KMS("dma_addr = 0x%lx\n", (unsigned long)buffer->dma_addr);
297 static void exynos_drm_output_poll_changed(struct drm_device *dev)
299 struct exynos_drm_private *private = dev->dev_private;
300 struct drm_fb_helper *fb_helper = private->fb_helper;
303 drm_fb_helper_hotplug_event(fb_helper);
305 exynos_drm_fbdev_init(dev);
308 static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
309 .fb_create = exynos_user_fb_create,
310 .output_poll_changed = exynos_drm_output_poll_changed,
313 void exynos_drm_mode_config_init(struct drm_device *dev)
315 dev->mode_config.min_width = 0;
316 dev->mode_config.min_height = 0;
319 * set max width and height as default value(4096x4096).
320 * this value would be used to check framebuffer size limitation
321 * at drm_mode_addfb().
323 dev->mode_config.max_width = 4096;
324 dev->mode_config.max_height = 4096;
326 dev->mode_config.funcs = &exynos_drm_mode_config_funcs;