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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7#include <drm/drm_crtc.h>
8#include <drm/drm_damage_helper.h>
9#include <drm/drm_file.h>
10#include <drm/drm_fourcc.h>
11#include <drm/drm_gem_framebuffer_helper.h>
12#include <drm/drm_probe_helper.h>
13
14#include "msm_drv.h"
15#include "msm_kms.h"
16#include "msm_gem.h"
17
18struct msm_framebuffer {
19 struct drm_framebuffer base;
20 const struct msm_format *format;
21};
22#define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base)
23
24static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
25 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos);
26
27static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {
28 .create_handle = drm_gem_fb_create_handle,
29 .destroy = drm_gem_fb_destroy,
30 .dirty = drm_atomic_helper_dirtyfb,
31};
32
33#ifdef CONFIG_DEBUG_FS
34void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
35{
36 struct msm_gem_stats stats = {};
37 int i, n = fb->format->num_planes;
38
39 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",
40 fb->width, fb->height, (char *)&fb->format->format,
41 drm_framebuffer_read_refcount(fb), fb->base.id);
42
43 for (i = 0; i < n; i++) {
44 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
45 i, fb->offsets[i], fb->pitches[i]);
46 msm_gem_describe(fb->obj[i], m, &stats);
47 }
48}
49#endif
50
51/* prepare/pin all the fb's bo's for scanout. Note that it is not valid
52 * to prepare an fb more multiple different initiator 'id's. But that
53 * should be fine, since only the scanout (mdpN) side of things needs
54 * this, the gpu doesn't care about fb's.
55 */
56int msm_framebuffer_prepare(struct drm_framebuffer *fb,
57 struct msm_gem_address_space *aspace)
58{
59 int ret, i, n = fb->format->num_planes;
60 uint64_t iova;
61
62 for (i = 0; i < n; i++) {
63 ret = msm_gem_get_and_pin_iova(fb->obj[i], aspace, &iova);
64 drm_dbg_state(fb->dev, "FB[%u]: iova[%d]: %08llx (%d)", fb->base.id, i, iova, ret);
65 if (ret)
66 return ret;
67 }
68
69 return 0;
70}
71
72void msm_framebuffer_cleanup(struct drm_framebuffer *fb,
73 struct msm_gem_address_space *aspace)
74{
75 int i, n = fb->format->num_planes;
76
77 for (i = 0; i < n; i++)
78 msm_gem_unpin_iova(fb->obj[i], aspace);
79}
80
81uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb,
82 struct msm_gem_address_space *aspace, int plane)
83{
84 if (!fb->obj[plane])
85 return 0;
86 return msm_gem_iova(fb->obj[plane], aspace) + fb->offsets[plane];
87}
88
89struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane)
90{
91 return drm_gem_fb_get_obj(fb, plane);
92}
93
94const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb)
95{
96 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
97 return msm_fb->format;
98}
99
100struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev,
101 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
102{
103 const struct drm_format_info *info = drm_get_format_info(dev,
104 mode_cmd);
105 struct drm_gem_object *bos[4] = {0};
106 struct drm_framebuffer *fb;
107 int ret, i, n = info->num_planes;
108
109 for (i = 0; i < n; i++) {
110 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
111 if (!bos[i]) {
112 ret = -ENXIO;
113 goto out_unref;
114 }
115 }
116
117 fb = msm_framebuffer_init(dev, mode_cmd, bos);
118 if (IS_ERR(fb)) {
119 ret = PTR_ERR(fb);
120 goto out_unref;
121 }
122
123 return fb;
124
125out_unref:
126 for (i = 0; i < n; i++)
127 drm_gem_object_put(bos[i]);
128 return ERR_PTR(ret);
129}
130
131static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
132 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
133{
134 const struct drm_format_info *info = drm_get_format_info(dev,
135 mode_cmd);
136 struct msm_drm_private *priv = dev->dev_private;
137 struct msm_kms *kms = priv->kms;
138 struct msm_framebuffer *msm_fb = NULL;
139 struct drm_framebuffer *fb;
140 const struct msm_format *format;
141 int ret, i, n;
142
143 drm_dbg_state(dev, "create framebuffer: mode_cmd=%p (%dx%d@%4.4s)",
144 mode_cmd, mode_cmd->width, mode_cmd->height,
145 (char *)&mode_cmd->pixel_format);
146
147 n = info->num_planes;
148 format = kms->funcs->get_format(kms, mode_cmd->pixel_format,
149 mode_cmd->modifier[0]);
150 if (!format) {
151 DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %4.4s\n",
152 (char *)&mode_cmd->pixel_format);
153 ret = -EINVAL;
154 goto fail;
155 }
156
157 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL);
158 if (!msm_fb) {
159 ret = -ENOMEM;
160 goto fail;
161 }
162
163 fb = &msm_fb->base;
164
165 msm_fb->format = format;
166
167 if (n > ARRAY_SIZE(fb->obj)) {
168 ret = -EINVAL;
169 goto fail;
170 }
171
172 for (i = 0; i < n; i++) {
173 unsigned int width = mode_cmd->width / (i ? info->hsub : 1);
174 unsigned int height = mode_cmd->height / (i ? info->vsub : 1);
175 unsigned int min_size;
176
177 min_size = (height - 1) * mode_cmd->pitches[i]
178 + width * info->cpp[i]
179 + mode_cmd->offsets[i];
180
181 if (bos[i]->size < min_size) {
182 ret = -EINVAL;
183 goto fail;
184 }
185
186 msm_fb->base.obj[i] = bos[i];
187 }
188
189 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
190
191 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs);
192 if (ret) {
193 DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret);
194 goto fail;
195 }
196
197 drm_dbg_state(dev, "create: FB ID: %d (%p)", fb->base.id, fb);
198
199 return fb;
200
201fail:
202 kfree(msm_fb);
203
204 return ERR_PTR(ret);
205}
206
207struct drm_framebuffer *
208msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format)
209{
210 struct drm_mode_fb_cmd2 mode_cmd = {
211 .pixel_format = format,
212 .width = w,
213 .height = h,
214 .pitches = { p },
215 };
216 struct drm_gem_object *bo;
217 struct drm_framebuffer *fb;
218 int size;
219
220 /* allocate backing bo */
221 size = mode_cmd.pitches[0] * mode_cmd.height;
222 DBG("allocating %d bytes for fb %d", size, dev->primary->index);
223 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN);
224 if (IS_ERR(bo)) {
225 dev_warn(dev->dev, "could not allocate stolen bo\n");
226 /* try regular bo: */
227 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC);
228 }
229 if (IS_ERR(bo)) {
230 DRM_DEV_ERROR(dev->dev, "failed to allocate buffer object\n");
231 return ERR_CAST(bo);
232 }
233
234 msm_gem_object_set_name(bo, "stolenfb");
235
236 fb = msm_framebuffer_init(dev, &mode_cmd, &bo);
237 if (IS_ERR(fb)) {
238 DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n");
239 /* note: if fb creation failed, we can't rely on fb destroy
240 * to unref the bo:
241 */
242 drm_gem_object_put(bo);
243 return ERR_CAST(fb);
244 }
245
246 return fb;
247}