2 * Copyright (C) 2013 Red Hat
3 * Author: Rob Clark <robdclark@gmail.com>
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
18 #include <drm/drm_crtc.h>
19 #include <drm/drm_crtc_helper.h>
25 struct msm_framebuffer {
26 struct drm_framebuffer base;
27 const struct msm_format *format;
28 struct drm_gem_object *planes[MAX_PLANE];
30 #define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base)
33 static int msm_framebuffer_create_handle(struct drm_framebuffer *fb,
34 struct drm_file *file_priv,
37 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
38 return drm_gem_handle_create(file_priv,
39 msm_fb->planes[0], handle);
42 static void msm_framebuffer_destroy(struct drm_framebuffer *fb)
44 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
45 int i, n = fb->format->num_planes;
47 DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
49 drm_framebuffer_cleanup(fb);
51 for (i = 0; i < n; i++) {
52 struct drm_gem_object *bo = msm_fb->planes[i];
54 drm_gem_object_unreference_unlocked(bo);
60 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {
61 .create_handle = msm_framebuffer_create_handle,
62 .destroy = msm_framebuffer_destroy,
65 #ifdef CONFIG_DEBUG_FS
66 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
68 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
69 int i, n = fb->format->num_planes;
71 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",
72 fb->width, fb->height, (char *)&fb->format->format,
73 drm_framebuffer_read_refcount(fb), fb->base.id);
75 for (i = 0; i < n; i++) {
76 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
77 i, fb->offsets[i], fb->pitches[i]);
78 msm_gem_describe(msm_fb->planes[i], m);
83 /* prepare/pin all the fb's bo's for scanout. Note that it is not valid
84 * to prepare an fb more multiple different initiator 'id's. But that
85 * should be fine, since only the scanout (mdpN) side of things needs
86 * this, the gpu doesn't care about fb's.
88 int msm_framebuffer_prepare(struct drm_framebuffer *fb,
89 struct msm_gem_address_space *aspace)
91 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
92 int ret, i, n = fb->format->num_planes;
95 for (i = 0; i < n; i++) {
96 ret = msm_gem_get_iova(msm_fb->planes[i], aspace, &iova);
97 DBG("FB[%u]: iova[%d]: %08llx (%d)", fb->base.id, i, iova, ret);
105 void msm_framebuffer_cleanup(struct drm_framebuffer *fb,
106 struct msm_gem_address_space *aspace)
108 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
109 int i, n = fb->format->num_planes;
111 for (i = 0; i < n; i++)
112 msm_gem_put_iova(msm_fb->planes[i], aspace);
115 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb,
116 struct msm_gem_address_space *aspace, int plane)
118 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
119 if (!msm_fb->planes[plane])
121 return msm_gem_iova(msm_fb->planes[plane], aspace) + fb->offsets[plane];
124 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane)
126 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
127 return msm_fb->planes[plane];
130 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb)
132 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
133 return msm_fb->format;
136 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev,
137 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
139 struct drm_gem_object *bos[4] = {0};
140 struct drm_framebuffer *fb;
141 int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
143 for (i = 0; i < n; i++) {
144 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
151 fb = msm_framebuffer_init(dev, mode_cmd, bos);
160 for (i = 0; i < n; i++)
161 drm_gem_object_unreference_unlocked(bos[i]);
165 struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
166 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
168 struct msm_drm_private *priv = dev->dev_private;
169 struct msm_kms *kms = priv->kms;
170 struct msm_framebuffer *msm_fb = NULL;
171 struct drm_framebuffer *fb;
172 const struct msm_format *format;
174 unsigned int hsub, vsub;
176 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
177 dev, mode_cmd, mode_cmd->width, mode_cmd->height,
178 (char *)&mode_cmd->pixel_format);
180 n = drm_format_num_planes(mode_cmd->pixel_format);
181 hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format);
182 vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format);
184 format = kms->funcs->get_format(kms, mode_cmd->pixel_format);
186 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
187 (char *)&mode_cmd->pixel_format);
192 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL);
200 msm_fb->format = format;
202 if (n > ARRAY_SIZE(msm_fb->planes)) {
207 for (i = 0; i < n; i++) {
208 unsigned int width = mode_cmd->width / (i ? hsub : 1);
209 unsigned int height = mode_cmd->height / (i ? vsub : 1);
210 unsigned int min_size;
212 min_size = (height - 1) * mode_cmd->pitches[i]
213 + width * drm_format_plane_cpp(mode_cmd->pixel_format, i)
214 + mode_cmd->offsets[i];
216 if (bos[i]->size < min_size) {
221 msm_fb->planes[i] = bos[i];
224 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
226 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs);
228 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
232 DBG("create: FB ID: %d (%p)", fb->base.id, fb);
242 struct drm_framebuffer *
243 msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format)
245 struct drm_mode_fb_cmd2 mode_cmd = {
246 .pixel_format = format,
251 struct drm_gem_object *bo;
252 struct drm_framebuffer *fb;
255 /* allocate backing bo */
256 size = mode_cmd.pitches[0] * mode_cmd.height;
257 DBG("allocating %d bytes for fb %d", size, dev->primary->index);
258 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN);
260 dev_warn(dev->dev, "could not allocate stolen bo\n");
261 /* try regular bo: */
262 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC);
265 dev_err(dev->dev, "failed to allocate buffer object\n");
269 fb = msm_framebuffer_init(dev, &mode_cmd, &bo);
271 dev_err(dev->dev, "failed to allocate fb\n");
272 /* note: if fb creation failed, we can't rely on fb destroy
275 drm_gem_object_unreference_unlocked(bo);