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 #define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base) 26 27 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 28 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos); 29 30 static int msm_framebuffer_dirtyfb(struct drm_framebuffer *fb, 31 struct drm_file *file_priv, unsigned int flags, 32 unsigned int color, struct drm_clip_rect *clips, 33 unsigned int num_clips) 34 { 35 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 36 37 /* If this fb is not used on any display requiring pixel data to be 38 * flushed, then skip dirtyfb 39 */ 40 if (refcount_read(&msm_fb->dirtyfb) == 1) 41 return 0; 42 43 return drm_atomic_helper_dirtyfb(fb, file_priv, flags, color, 44 clips, num_clips); 45 } 46 47 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = { 48 .create_handle = drm_gem_fb_create_handle, 49 .destroy = drm_gem_fb_destroy, 50 .dirty = msm_framebuffer_dirtyfb, 51 }; 52 53 #ifdef CONFIG_DEBUG_FS 54 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 55 { 56 struct msm_gem_stats stats = {}; 57 int i, n = fb->format->num_planes; 58 59 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n", 60 fb->width, fb->height, (char *)&fb->format->format, 61 drm_framebuffer_read_refcount(fb), fb->base.id); 62 63 for (i = 0; i < n; i++) { 64 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 65 i, fb->offsets[i], fb->pitches[i]); 66 msm_gem_describe(fb->obj[i], m, &stats); 67 } 68 } 69 #endif 70 71 /* prepare/pin all the fb's bo's for scanout. 72 */ 73 int msm_framebuffer_prepare(struct drm_framebuffer *fb, 74 struct msm_gem_address_space *aspace, 75 bool needs_dirtyfb) 76 { 77 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 78 int ret, i, n = fb->format->num_planes; 79 uint64_t iova; 80 81 if (needs_dirtyfb) 82 refcount_inc(&msm_fb->dirtyfb); 83 84 for (i = 0; i < n; i++) { 85 ret = msm_gem_get_and_pin_iova(fb->obj[i], aspace, &iova); 86 drm_dbg_state(fb->dev, "FB[%u]: iova[%d]: %08llx (%d)", fb->base.id, i, iova, ret); 87 if (ret) 88 return ret; 89 } 90 91 return 0; 92 } 93 94 void msm_framebuffer_cleanup(struct drm_framebuffer *fb, 95 struct msm_gem_address_space *aspace, 96 bool needed_dirtyfb) 97 { 98 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 99 int i, n = fb->format->num_planes; 100 101 if (needed_dirtyfb) 102 refcount_dec(&msm_fb->dirtyfb); 103 104 for (i = 0; i < n; i++) 105 msm_gem_unpin_iova(fb->obj[i], aspace); 106 } 107 108 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, 109 struct msm_gem_address_space *aspace, int plane) 110 { 111 if (!fb->obj[plane]) 112 return 0; 113 return msm_gem_iova(fb->obj[plane], aspace) + fb->offsets[plane]; 114 } 115 116 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane) 117 { 118 return drm_gem_fb_get_obj(fb, plane); 119 } 120 121 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb) 122 { 123 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 124 return msm_fb->format; 125 } 126 127 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev, 128 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 129 { 130 const struct drm_format_info *info = drm_get_format_info(dev, 131 mode_cmd); 132 struct drm_gem_object *bos[4] = {0}; 133 struct drm_framebuffer *fb; 134 int ret, i, n = info->num_planes; 135 136 for (i = 0; i < n; i++) { 137 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 138 if (!bos[i]) { 139 ret = -ENXIO; 140 goto out_unref; 141 } 142 } 143 144 fb = msm_framebuffer_init(dev, mode_cmd, bos); 145 if (IS_ERR(fb)) { 146 ret = PTR_ERR(fb); 147 goto out_unref; 148 } 149 150 return fb; 151 152 out_unref: 153 for (i = 0; i < n; i++) 154 drm_gem_object_put(bos[i]); 155 return ERR_PTR(ret); 156 } 157 158 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 159 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 160 { 161 const struct drm_format_info *info = drm_get_format_info(dev, 162 mode_cmd); 163 struct msm_drm_private *priv = dev->dev_private; 164 struct msm_kms *kms = priv->kms; 165 struct msm_framebuffer *msm_fb = NULL; 166 struct drm_framebuffer *fb; 167 const struct msm_format *format; 168 int ret, i, n; 169 170 drm_dbg_state(dev, "create framebuffer: mode_cmd=%p (%dx%d@%4.4s)", 171 mode_cmd, mode_cmd->width, mode_cmd->height, 172 (char *)&mode_cmd->pixel_format); 173 174 n = info->num_planes; 175 format = kms->funcs->get_format(kms, mode_cmd->pixel_format, 176 mode_cmd->modifier[0]); 177 if (!format) { 178 DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %4.4s\n", 179 (char *)&mode_cmd->pixel_format); 180 ret = -EINVAL; 181 goto fail; 182 } 183 184 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL); 185 if (!msm_fb) { 186 ret = -ENOMEM; 187 goto fail; 188 } 189 190 fb = &msm_fb->base; 191 192 msm_fb->format = format; 193 194 if (n > ARRAY_SIZE(fb->obj)) { 195 ret = -EINVAL; 196 goto fail; 197 } 198 199 for (i = 0; i < n; i++) { 200 unsigned int width = mode_cmd->width / (i ? info->hsub : 1); 201 unsigned int height = mode_cmd->height / (i ? info->vsub : 1); 202 unsigned int min_size; 203 204 min_size = (height - 1) * mode_cmd->pitches[i] 205 + width * info->cpp[i] 206 + mode_cmd->offsets[i]; 207 208 if (bos[i]->size < min_size) { 209 ret = -EINVAL; 210 goto fail; 211 } 212 213 msm_fb->base.obj[i] = bos[i]; 214 } 215 216 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 217 218 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs); 219 if (ret) { 220 DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret); 221 goto fail; 222 } 223 224 refcount_set(&msm_fb->dirtyfb, 1); 225 226 drm_dbg_state(dev, "create: FB ID: %d (%p)", fb->base.id, fb); 227 228 return fb; 229 230 fail: 231 kfree(msm_fb); 232 233 return ERR_PTR(ret); 234 } 235 236 struct drm_framebuffer * 237 msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format) 238 { 239 struct drm_mode_fb_cmd2 mode_cmd = { 240 .pixel_format = format, 241 .width = w, 242 .height = h, 243 .pitches = { p }, 244 }; 245 struct drm_gem_object *bo; 246 struct drm_framebuffer *fb; 247 int size; 248 249 /* allocate backing bo */ 250 size = mode_cmd.pitches[0] * mode_cmd.height; 251 DBG("allocating %d bytes for fb %d", size, dev->primary->index); 252 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN); 253 if (IS_ERR(bo)) { 254 dev_warn(dev->dev, "could not allocate stolen bo\n"); 255 /* try regular bo: */ 256 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC); 257 } 258 if (IS_ERR(bo)) { 259 DRM_DEV_ERROR(dev->dev, "failed to allocate buffer object\n"); 260 return ERR_CAST(bo); 261 } 262 263 msm_gem_object_set_name(bo, "stolenfb"); 264 265 fb = msm_framebuffer_init(dev, &mode_cmd, &bo); 266 if (IS_ERR(fb)) { 267 DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n"); 268 /* note: if fb creation failed, we can't rely on fb destroy 269 * to unref the bo: 270 */ 271 drm_gem_object_put(bo); 272 return ERR_CAST(fb); 273 } 274 275 return fb; 276 } 277