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 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 31 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 32 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos); 33 34 static int msm_framebuffer_dirtyfb(struct drm_framebuffer *fb, 35 struct drm_file *file_priv, unsigned int flags, 36 unsigned int color, struct drm_clip_rect *clips, 37 unsigned int num_clips) 38 { 39 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 40 41 /* If this fb is not used on any display requiring pixel data to be 42 * flushed, then skip dirtyfb 43 */ 44 if (refcount_read(&msm_fb->dirtyfb) == 1) 45 return 0; 46 47 return drm_atomic_helper_dirtyfb(fb, file_priv, flags, color, 48 clips, num_clips); 49 } 50 51 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = { 52 .create_handle = drm_gem_fb_create_handle, 53 .destroy = drm_gem_fb_destroy, 54 .dirty = msm_framebuffer_dirtyfb, 55 }; 56 57 #ifdef CONFIG_DEBUG_FS 58 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 59 { 60 struct msm_gem_stats stats = {}; 61 int i, n = fb->format->num_planes; 62 63 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n", 64 fb->width, fb->height, (char *)&fb->format->format, 65 drm_framebuffer_read_refcount(fb), fb->base.id); 66 67 for (i = 0; i < n; i++) { 68 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 69 i, fb->offsets[i], fb->pitches[i]); 70 msm_gem_describe(fb->obj[i], m, &stats); 71 } 72 } 73 #endif 74 75 /* prepare/pin all the fb's bo's for scanout. 76 */ 77 int msm_framebuffer_prepare(struct drm_framebuffer *fb, 78 struct msm_gem_address_space *aspace, 79 bool needs_dirtyfb) 80 { 81 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 82 int ret, i, n = fb->format->num_planes; 83 84 if (needs_dirtyfb) 85 refcount_inc(&msm_fb->dirtyfb); 86 87 atomic_inc(&msm_fb->prepare_count); 88 89 for (i = 0; i < n; i++) { 90 ret = msm_gem_get_and_pin_iova(fb->obj[i], aspace, &msm_fb->iova[i]); 91 drm_dbg_state(fb->dev, "FB[%u]: iova[%d]: %08llx (%d)", 92 fb->base.id, i, msm_fb->iova[i], ret); 93 if (ret) 94 return ret; 95 } 96 97 return 0; 98 } 99 100 void msm_framebuffer_cleanup(struct drm_framebuffer *fb, 101 struct msm_gem_address_space *aspace, 102 bool needed_dirtyfb) 103 { 104 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 105 int i, n = fb->format->num_planes; 106 107 if (needed_dirtyfb) 108 refcount_dec(&msm_fb->dirtyfb); 109 110 for (i = 0; i < n; i++) 111 msm_gem_unpin_iova(fb->obj[i], aspace); 112 113 if (!atomic_dec_return(&msm_fb->prepare_count)) 114 memset(msm_fb->iova, 0, sizeof(msm_fb->iova)); 115 } 116 117 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, 118 struct msm_gem_address_space *aspace, int plane) 119 { 120 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 121 return msm_fb->iova[plane] + fb->offsets[plane]; 122 } 123 124 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane) 125 { 126 return drm_gem_fb_get_obj(fb, plane); 127 } 128 129 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb) 130 { 131 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 132 return msm_fb->format; 133 } 134 135 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev, 136 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 137 { 138 const struct drm_format_info *info = drm_get_format_info(dev, 139 mode_cmd); 140 struct drm_gem_object *bos[4] = {0}; 141 struct drm_framebuffer *fb; 142 int ret, i, n = info->num_planes; 143 144 for (i = 0; i < n; i++) { 145 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 146 if (!bos[i]) { 147 ret = -ENXIO; 148 goto out_unref; 149 } 150 } 151 152 fb = msm_framebuffer_init(dev, mode_cmd, bos); 153 if (IS_ERR(fb)) { 154 ret = PTR_ERR(fb); 155 goto out_unref; 156 } 157 158 return fb; 159 160 out_unref: 161 for (i = 0; i < n; i++) 162 drm_gem_object_put(bos[i]); 163 return ERR_PTR(ret); 164 } 165 166 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 167 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 168 { 169 const struct drm_format_info *info = drm_get_format_info(dev, 170 mode_cmd); 171 struct msm_drm_private *priv = dev->dev_private; 172 struct msm_kms *kms = priv->kms; 173 struct msm_framebuffer *msm_fb = NULL; 174 struct drm_framebuffer *fb; 175 const struct msm_format *format; 176 int ret, i, n; 177 178 drm_dbg_state(dev, "create framebuffer: mode_cmd=%p (%dx%d@%4.4s)", 179 mode_cmd, mode_cmd->width, mode_cmd->height, 180 (char *)&mode_cmd->pixel_format); 181 182 n = info->num_planes; 183 format = kms->funcs->get_format(kms, mode_cmd->pixel_format, 184 mode_cmd->modifier[0]); 185 if (!format) { 186 DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %4.4s\n", 187 (char *)&mode_cmd->pixel_format); 188 ret = -EINVAL; 189 goto fail; 190 } 191 192 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL); 193 if (!msm_fb) { 194 ret = -ENOMEM; 195 goto fail; 196 } 197 198 fb = &msm_fb->base; 199 200 msm_fb->format = format; 201 202 if (n > ARRAY_SIZE(fb->obj)) { 203 ret = -EINVAL; 204 goto fail; 205 } 206 207 for (i = 0; i < n; i++) { 208 unsigned int width = mode_cmd->width / (i ? info->hsub : 1); 209 unsigned int height = mode_cmd->height / (i ? info->vsub : 1); 210 unsigned int min_size; 211 212 min_size = (height - 1) * mode_cmd->pitches[i] 213 + width * info->cpp[i] 214 + mode_cmd->offsets[i]; 215 216 if (bos[i]->size < min_size) { 217 ret = -EINVAL; 218 goto fail; 219 } 220 221 msm_fb->base.obj[i] = bos[i]; 222 } 223 224 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 225 226 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs); 227 if (ret) { 228 DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret); 229 goto fail; 230 } 231 232 refcount_set(&msm_fb->dirtyfb, 1); 233 234 drm_dbg_state(dev, "create: FB ID: %d (%p)", fb->base.id, fb); 235 236 return fb; 237 238 fail: 239 kfree(msm_fb); 240 241 return ERR_PTR(ret); 242 } 243 244 struct drm_framebuffer * 245 msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format) 246 { 247 struct drm_mode_fb_cmd2 mode_cmd = { 248 .pixel_format = format, 249 .width = w, 250 .height = h, 251 .pitches = { p }, 252 }; 253 struct drm_gem_object *bo; 254 struct drm_framebuffer *fb; 255 int size; 256 257 /* allocate backing bo */ 258 size = mode_cmd.pitches[0] * mode_cmd.height; 259 DBG("allocating %d bytes for fb %d", size, dev->primary->index); 260 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN); 261 if (IS_ERR(bo)) { 262 dev_warn(dev->dev, "could not allocate stolen bo\n"); 263 /* try regular bo: */ 264 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC); 265 } 266 if (IS_ERR(bo)) { 267 DRM_DEV_ERROR(dev->dev, "failed to allocate buffer object\n"); 268 return ERR_CAST(bo); 269 } 270 271 msm_gem_object_set_name(bo, "stolenfb"); 272 273 fb = msm_framebuffer_init(dev, &mode_cmd, &bo); 274 if (IS_ERR(fb)) { 275 DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n"); 276 /* note: if fb creation failed, we can't rely on fb destroy 277 * to unref the bo: 278 */ 279 drm_gem_object_put(bo); 280 return ERR_CAST(fb); 281 } 282 283 return fb; 284 } 285