1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
7 #include <drm/drm_crtc.h>
8 #include <drm/drm_damage_helper.h>
9 #include <drm/drm_gem_framebuffer_helper.h>
10 #include <drm/drm_probe_helper.h>
16 struct msm_framebuffer {
17 struct drm_framebuffer base;
18 const struct msm_format *format;
20 #define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base)
22 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
23 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos);
25 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {
26 .create_handle = drm_gem_fb_create_handle,
27 .destroy = drm_gem_fb_destroy,
28 .dirty = drm_atomic_helper_dirtyfb,
31 #ifdef CONFIG_DEBUG_FS
32 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
34 int i, n = fb->format->num_planes;
36 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",
37 fb->width, fb->height, (char *)&fb->format->format,
38 drm_framebuffer_read_refcount(fb), fb->base.id);
40 for (i = 0; i < n; i++) {
41 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
42 i, fb->offsets[i], fb->pitches[i]);
43 msm_gem_describe(fb->obj[i], m);
48 /* prepare/pin all the fb's bo's for scanout. Note that it is not valid
49 * to prepare an fb more multiple different initiator 'id's. But that
50 * should be fine, since only the scanout (mdpN) side of things needs
51 * this, the gpu doesn't care about fb's.
53 int msm_framebuffer_prepare(struct drm_framebuffer *fb,
54 struct msm_gem_address_space *aspace)
56 int ret, i, n = fb->format->num_planes;
59 for (i = 0; i < n; i++) {
60 ret = msm_gem_get_and_pin_iova(fb->obj[i], aspace, &iova);
61 DBG("FB[%u]: iova[%d]: %08llx (%d)", fb->base.id, i, iova, ret);
69 void msm_framebuffer_cleanup(struct drm_framebuffer *fb,
70 struct msm_gem_address_space *aspace)
72 int i, n = fb->format->num_planes;
74 for (i = 0; i < n; i++)
75 msm_gem_unpin_iova(fb->obj[i], aspace);
78 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb,
79 struct msm_gem_address_space *aspace, int plane)
83 return msm_gem_iova(fb->obj[plane], aspace) + fb->offsets[plane];
86 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane)
88 return drm_gem_fb_get_obj(fb, plane);
91 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb)
93 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
94 return msm_fb->format;
97 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev,
98 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
100 const struct drm_format_info *info = drm_get_format_info(dev,
102 struct drm_gem_object *bos[4] = {0};
103 struct drm_framebuffer *fb;
104 int ret, i, n = info->num_planes;
106 for (i = 0; i < n; i++) {
107 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
114 fb = msm_framebuffer_init(dev, mode_cmd, bos);
123 for (i = 0; i < n; i++)
124 drm_gem_object_put_unlocked(bos[i]);
128 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
129 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
131 const struct drm_format_info *info = drm_get_format_info(dev,
133 struct msm_drm_private *priv = dev->dev_private;
134 struct msm_kms *kms = priv->kms;
135 struct msm_framebuffer *msm_fb = NULL;
136 struct drm_framebuffer *fb;
137 const struct msm_format *format;
140 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
141 dev, mode_cmd, mode_cmd->width, mode_cmd->height,
142 (char *)&mode_cmd->pixel_format);
144 n = info->num_planes;
145 format = kms->funcs->get_format(kms, mode_cmd->pixel_format,
146 mode_cmd->modifier[0]);
148 DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %4.4s\n",
149 (char *)&mode_cmd->pixel_format);
154 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL);
162 msm_fb->format = format;
164 if (n > ARRAY_SIZE(fb->obj)) {
169 for (i = 0; i < n; i++) {
170 unsigned int width = mode_cmd->width / (i ? info->hsub : 1);
171 unsigned int height = mode_cmd->height / (i ? info->vsub : 1);
172 unsigned int min_size;
174 min_size = (height - 1) * mode_cmd->pitches[i]
175 + width * info->cpp[i]
176 + mode_cmd->offsets[i];
178 if (bos[i]->size < min_size) {
183 msm_fb->base.obj[i] = bos[i];
186 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
188 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs);
190 DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret);
194 DBG("create: FB ID: %d (%p)", fb->base.id, fb);
204 struct drm_framebuffer *
205 msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format)
207 struct drm_mode_fb_cmd2 mode_cmd = {
208 .pixel_format = format,
213 struct drm_gem_object *bo;
214 struct drm_framebuffer *fb;
217 /* allocate backing bo */
218 size = mode_cmd.pitches[0] * mode_cmd.height;
219 DBG("allocating %d bytes for fb %d", size, dev->primary->index);
220 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN);
222 dev_warn(dev->dev, "could not allocate stolen bo\n");
223 /* try regular bo: */
224 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC);
227 DRM_DEV_ERROR(dev->dev, "failed to allocate buffer object\n");
231 msm_gem_object_set_name(bo, "stolenfb");
233 fb = msm_framebuffer_init(dev, &mode_cmd, &bo);
235 DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n");
236 /* note: if fb creation failed, we can't rely on fb destroy
239 drm_gem_object_put_unlocked(bo);