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_fourcc.h>
10 #include <drm/drm_framebuffer.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
18 struct msm_framebuffer {
19 struct drm_framebuffer base;
20 const struct msm_format *format;
21
22 /* Count of # of attached planes which need dirtyfb: */
23 refcount_t dirtyfb;
24
25 /* Framebuffer per-plane address, if pinned, else zero: */
26 uint64_t iova[DRM_FORMAT_MAX_PLANES];
27 atomic_t prepare_count;
28 };
29 #define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base)
30
msm_framebuffer_dirtyfb(struct drm_framebuffer * fb,struct drm_file * file_priv,unsigned int flags,unsigned int color,struct drm_clip_rect * clips,unsigned int num_clips)31 static int msm_framebuffer_dirtyfb(struct drm_framebuffer *fb,
32 struct drm_file *file_priv, unsigned int flags,
33 unsigned int color, struct drm_clip_rect *clips,
34 unsigned int num_clips)
35 {
36 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
37
38 /* If this fb is not used on any display requiring pixel data to be
39 * flushed, then skip dirtyfb
40 */
41 if (refcount_read(&msm_fb->dirtyfb) == 1)
42 return 0;
43
44 return drm_atomic_helper_dirtyfb(fb, file_priv, flags, color,
45 clips, num_clips);
46 }
47
48 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {
49 .create_handle = drm_gem_fb_create_handle,
50 .destroy = drm_gem_fb_destroy,
51 .dirty = msm_framebuffer_dirtyfb,
52 };
53
54 #ifdef CONFIG_DEBUG_FS
msm_framebuffer_describe(struct drm_framebuffer * fb,struct seq_file * m)55 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
56 {
57 struct msm_gem_stats stats = {};
58 int i, n = fb->format->num_planes;
59
60 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",
61 fb->width, fb->height, (char *)&fb->format->format,
62 drm_framebuffer_read_refcount(fb), fb->base.id);
63
64 for (i = 0; i < n; i++) {
65 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
66 i, fb->offsets[i], fb->pitches[i]);
67 msm_gem_describe(fb->obj[i], m, &stats);
68 }
69 }
70 #endif
71
72 /* prepare/pin all the fb's bo's for scanout.
73 */
msm_framebuffer_prepare(struct drm_framebuffer * fb,bool needs_dirtyfb)74 int msm_framebuffer_prepare(struct drm_framebuffer *fb, bool needs_dirtyfb)
75 {
76 struct msm_drm_private *priv = fb->dev->dev_private;
77 struct drm_gpuvm *vm = priv->kms->vm;
78 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
79 int ret, i, n = fb->format->num_planes;
80
81 if (needs_dirtyfb)
82 refcount_inc(&msm_fb->dirtyfb);
83
84 if (atomic_inc_return(&msm_fb->prepare_count) > 1)
85 return 0;
86
87 for (i = 0; i < n; i++) {
88 msm_gem_vma_get(fb->obj[i]);
89 ret = msm_gem_get_and_pin_iova(fb->obj[i], vm, &msm_fb->iova[i]);
90 drm_dbg_state(fb->dev, "FB[%u]: iova[%d]: %08llx (%d)\n",
91 fb->base.id, i, msm_fb->iova[i], ret);
92 if (ret)
93 return ret;
94 }
95
96 return 0;
97 }
98
msm_framebuffer_cleanup(struct drm_framebuffer * fb,bool needed_dirtyfb)99 void msm_framebuffer_cleanup(struct drm_framebuffer *fb, bool needed_dirtyfb)
100 {
101 struct msm_drm_private *priv = fb->dev->dev_private;
102 struct drm_gpuvm *vm = priv->kms->vm;
103 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
104 int i, n = fb->format->num_planes;
105
106 if (needed_dirtyfb)
107 refcount_dec(&msm_fb->dirtyfb);
108
109 if (atomic_dec_return(&msm_fb->prepare_count))
110 return;
111
112 memset(msm_fb->iova, 0, sizeof(msm_fb->iova));
113
114 for (i = 0; i < n; i++) {
115 msm_gem_unpin_iova(fb->obj[i], vm);
116 msm_gem_vma_put(fb->obj[i]);
117 }
118 }
119
msm_framebuffer_iova(struct drm_framebuffer * fb,int plane)120 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, int plane)
121 {
122 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
123 return msm_fb->iova[plane] + fb->offsets[plane];
124 }
125
msm_framebuffer_bo(struct drm_framebuffer * fb,int plane)126 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane)
127 {
128 return drm_gem_fb_get_obj(fb, plane);
129 }
130
msm_framebuffer_format(struct drm_framebuffer * fb)131 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb)
132 {
133 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
134 return msm_fb->format;
135 }
136
137 static struct drm_framebuffer *
msm_framebuffer_init(struct drm_device * dev,const struct drm_format_info * info,const struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** bos)138 msm_framebuffer_init(struct drm_device *dev, const struct drm_format_info *info,
139 const struct drm_mode_fb_cmd2 *mode_cmd,
140 struct drm_gem_object **bos)
141 {
142 struct msm_drm_private *priv = dev->dev_private;
143 struct msm_kms *kms = priv->kms;
144 struct msm_framebuffer *msm_fb = NULL;
145 struct drm_framebuffer *fb;
146 const struct msm_format *format;
147 int ret, i, n;
148
149 drm_dbg_state(dev, "create framebuffer: mode_cmd=%p (%dx%d@%p4cc)\n",
150 mode_cmd, mode_cmd->width, mode_cmd->height,
151 &mode_cmd->pixel_format);
152
153 n = info->num_planes;
154 format = mdp_get_format(kms, mode_cmd->pixel_format,
155 mode_cmd->modifier[0]);
156 if (!format) {
157 DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %p4cc\n",
158 &mode_cmd->pixel_format);
159 ret = -EINVAL;
160 goto fail;
161 }
162
163 msm_fb = kzalloc_obj(*msm_fb);
164 if (!msm_fb) {
165 ret = -ENOMEM;
166 goto fail;
167 }
168
169 fb = &msm_fb->base;
170
171 msm_fb->format = format;
172
173 if (n > ARRAY_SIZE(fb->obj)) {
174 ret = -EINVAL;
175 goto fail;
176 }
177
178 for (i = 0; i < n; i++) {
179 unsigned int width = mode_cmd->width / (i ? info->hsub : 1);
180 unsigned int height = mode_cmd->height / (i ? info->vsub : 1);
181 unsigned int min_size;
182
183 min_size = (height - 1) * mode_cmd->pitches[i]
184 + width * info->cpp[i]
185 + mode_cmd->offsets[i];
186
187 if (bos[i]->size < min_size) {
188 ret = UERR(EINVAL, dev, "plane %d too small", i);
189 goto fail;
190 }
191
192 if (to_msm_bo(bos[i])->flags & MSM_BO_NO_SHARE) {
193 ret = UERR(EINVAL, dev, "Cannot map _NO_SHARE to kms vm");
194 goto fail;
195 }
196
197 msm_fb->base.obj[i] = bos[i];
198 }
199
200 drm_helper_mode_fill_fb_struct(dev, fb, info, mode_cmd);
201
202 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs);
203 if (ret) {
204 DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret);
205 goto fail;
206 }
207
208 refcount_set(&msm_fb->dirtyfb, 1);
209
210 drm_dbg_state(dev, "create: FB ID: %d (%p)\n", fb->base.id, fb);
211
212 return fb;
213
214 fail:
215 kfree(msm_fb);
216
217 return ERR_PTR(ret);
218 }
219
msm_framebuffer_create(struct drm_device * dev,struct drm_file * file,const struct drm_format_info * info,const struct drm_mode_fb_cmd2 * mode_cmd)220 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev,
221 struct drm_file *file,
222 const struct drm_format_info *info,
223 const struct drm_mode_fb_cmd2 *mode_cmd)
224 {
225 struct drm_gem_object *bos[4] = {0};
226 struct drm_framebuffer *fb;
227 int ret, i, n = info->num_planes;
228
229 for (i = 0; i < n; i++) {
230 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
231 if (!bos[i]) {
232 ret = -ENXIO;
233 goto out_unref;
234 }
235 }
236
237 fb = msm_framebuffer_init(dev, info, mode_cmd, bos);
238 if (IS_ERR(fb)) {
239 ret = PTR_ERR(fb);
240 goto out_unref;
241 }
242
243 return fb;
244
245 out_unref:
246 for (i = 0; i < n; i++)
247 drm_gem_object_put(bos[i]);
248 return ERR_PTR(ret);
249 }
250