1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/ 4 * Author: Rob Clark <rob@ti.com> 5 */ 6 7 #include <linux/dma-mapping.h> 8 9 #include <drm/drm_modeset_helper.h> 10 #include <drm/drm_fourcc.h> 11 #include <drm/drm_gem_framebuffer_helper.h> 12 13 #include "omap_dmm_tiler.h" 14 #include "omap_drv.h" 15 16 /* 17 * framebuffer funcs 18 */ 19 20 static const u32 formats[] = { 21 /* 16bpp [A]RGB: */ 22 DRM_FORMAT_RGB565, /* RGB16-565 */ 23 DRM_FORMAT_RGBX4444, /* RGB12x-4444 */ 24 DRM_FORMAT_XRGB4444, /* xRGB12-4444 */ 25 DRM_FORMAT_RGBA4444, /* RGBA12-4444 */ 26 DRM_FORMAT_ARGB4444, /* ARGB16-4444 */ 27 DRM_FORMAT_XRGB1555, /* xRGB15-1555 */ 28 DRM_FORMAT_ARGB1555, /* ARGB16-1555 */ 29 /* 24bpp RGB: */ 30 DRM_FORMAT_RGB888, /* RGB24-888 */ 31 /* 32bpp [A]RGB: */ 32 DRM_FORMAT_RGBX8888, /* RGBx24-8888 */ 33 DRM_FORMAT_XRGB8888, /* xRGB24-8888 */ 34 DRM_FORMAT_RGBA8888, /* RGBA32-8888 */ 35 DRM_FORMAT_ARGB8888, /* ARGB32-8888 */ 36 /* YUV: */ 37 DRM_FORMAT_NV12, 38 DRM_FORMAT_YUYV, 39 DRM_FORMAT_UYVY, 40 }; 41 42 /* per-plane info for the fb: */ 43 struct plane { 44 dma_addr_t dma_addr; 45 }; 46 47 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base) 48 49 struct omap_framebuffer { 50 struct drm_framebuffer base; 51 int pin_count; 52 const struct drm_format_info *format; 53 struct plane planes[2]; 54 /* lock for pinning (pin_count and planes.dma_addr) */ 55 struct mutex lock; 56 }; 57 58 static int omap_framebuffer_dirty(struct drm_framebuffer *fb, 59 struct drm_file *file_priv, 60 unsigned flags, unsigned color, 61 struct drm_clip_rect *clips, 62 unsigned num_clips) 63 { 64 struct drm_crtc *crtc; 65 66 drm_modeset_lock_all(fb->dev); 67 68 drm_for_each_crtc(crtc, fb->dev) 69 omap_crtc_flush(crtc); 70 71 drm_modeset_unlock_all(fb->dev); 72 73 return 0; 74 } 75 76 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = { 77 .create_handle = drm_gem_fb_create_handle, 78 .dirty = omap_framebuffer_dirty, 79 .destroy = drm_gem_fb_destroy, 80 }; 81 82 static u32 get_linear_addr(struct drm_framebuffer *fb, 83 const struct drm_format_info *format, int n, int x, int y) 84 { 85 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 86 struct plane *plane = &omap_fb->planes[n]; 87 u32 offset; 88 89 offset = fb->offsets[n] 90 + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub)) 91 + (y * fb->pitches[n] / (n == 0 ? 1 : format->vsub)); 92 93 return plane->dma_addr + offset; 94 } 95 96 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb) 97 { 98 return omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK; 99 } 100 101 /* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */ 102 static u32 drm_rotation_to_tiler(unsigned int drm_rot) 103 { 104 u32 orient; 105 106 switch (drm_rot & DRM_MODE_ROTATE_MASK) { 107 default: 108 case DRM_MODE_ROTATE_0: 109 orient = 0; 110 break; 111 case DRM_MODE_ROTATE_90: 112 orient = MASK_XY_FLIP | MASK_X_INVERT; 113 break; 114 case DRM_MODE_ROTATE_180: 115 orient = MASK_X_INVERT | MASK_Y_INVERT; 116 break; 117 case DRM_MODE_ROTATE_270: 118 orient = MASK_XY_FLIP | MASK_Y_INVERT; 119 break; 120 } 121 122 if (drm_rot & DRM_MODE_REFLECT_X) 123 orient ^= MASK_X_INVERT; 124 125 if (drm_rot & DRM_MODE_REFLECT_Y) 126 orient ^= MASK_Y_INVERT; 127 128 return orient; 129 } 130 131 /* update ovl info for scanout, handles cases of multi-planar fb's, etc. 132 */ 133 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb, 134 struct drm_plane_state *state, struct omap_overlay_info *info) 135 { 136 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 137 const struct drm_format_info *format = omap_fb->format; 138 u32 x, y, orient = 0; 139 140 info->fourcc = fb->format->format; 141 142 info->pos_x = state->crtc_x; 143 info->pos_y = state->crtc_y; 144 info->out_width = state->crtc_w; 145 info->out_height = state->crtc_h; 146 info->width = state->src_w >> 16; 147 info->height = state->src_h >> 16; 148 149 /* DSS driver wants the w & h in rotated orientation */ 150 if (drm_rotation_90_or_270(state->rotation)) 151 swap(info->width, info->height); 152 153 x = state->src_x >> 16; 154 y = state->src_y >> 16; 155 156 if (omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK) { 157 u32 w = state->src_w >> 16; 158 u32 h = state->src_h >> 16; 159 160 orient = drm_rotation_to_tiler(state->rotation); 161 162 /* 163 * omap_gem_rotated_paddr() wants the x & y in tiler units. 164 * Usually tiler unit size is the same as the pixel size, except 165 * for YUV422 formats, for which the tiler unit size is 32 bits 166 * and pixel size is 16 bits. 167 */ 168 if (fb->format->format == DRM_FORMAT_UYVY || 169 fb->format->format == DRM_FORMAT_YUYV) { 170 x /= 2; 171 w /= 2; 172 } 173 174 /* adjust x,y offset for invert: */ 175 if (orient & MASK_Y_INVERT) 176 y += h - 1; 177 if (orient & MASK_X_INVERT) 178 x += w - 1; 179 180 /* Note: x and y are in TILER units, not pixels */ 181 omap_gem_rotated_dma_addr(fb->obj[0], orient, x, y, 182 &info->paddr); 183 info->rotation_type = OMAP_DSS_ROT_TILER; 184 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0; 185 /* Note: stride in TILER units, not pixels */ 186 info->screen_width = omap_gem_tiled_stride(fb->obj[0], orient); 187 } else { 188 switch (state->rotation & DRM_MODE_ROTATE_MASK) { 189 case 0: 190 case DRM_MODE_ROTATE_0: 191 /* OK */ 192 break; 193 194 default: 195 dev_warn(fb->dev->dev, 196 "rotation '%d' ignored for non-tiled fb\n", 197 state->rotation); 198 break; 199 } 200 201 info->paddr = get_linear_addr(fb, format, 0, x, y); 202 info->rotation_type = OMAP_DSS_ROT_NONE; 203 info->rotation = DRM_MODE_ROTATE_0; 204 info->screen_width = fb->pitches[0]; 205 } 206 207 /* convert to pixels: */ 208 info->screen_width /= format->cpp[0]; 209 210 if (fb->format->format == DRM_FORMAT_NV12) { 211 if (info->rotation_type == OMAP_DSS_ROT_TILER) { 212 WARN_ON(!(omap_gem_flags(fb->obj[1]) & OMAP_BO_TILED_MASK)); 213 omap_gem_rotated_dma_addr(fb->obj[1], orient, x/2, y/2, 214 &info->p_uv_addr); 215 } else { 216 info->p_uv_addr = get_linear_addr(fb, format, 1, x, y); 217 } 218 } else { 219 info->p_uv_addr = 0; 220 } 221 } 222 223 /* pin, prepare for scanout: */ 224 int omap_framebuffer_pin(struct drm_framebuffer *fb) 225 { 226 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 227 int ret, i, n = fb->format->num_planes; 228 229 mutex_lock(&omap_fb->lock); 230 231 if (omap_fb->pin_count > 0) { 232 omap_fb->pin_count++; 233 mutex_unlock(&omap_fb->lock); 234 return 0; 235 } 236 237 for (i = 0; i < n; i++) { 238 struct plane *plane = &omap_fb->planes[i]; 239 ret = omap_gem_pin(fb->obj[i], &plane->dma_addr); 240 if (ret) 241 goto fail; 242 omap_gem_dma_sync_buffer(fb->obj[i], DMA_TO_DEVICE); 243 } 244 245 omap_fb->pin_count++; 246 247 mutex_unlock(&omap_fb->lock); 248 249 return 0; 250 251 fail: 252 for (i--; i >= 0; i--) { 253 struct plane *plane = &omap_fb->planes[i]; 254 omap_gem_unpin(fb->obj[i]); 255 plane->dma_addr = 0; 256 } 257 258 mutex_unlock(&omap_fb->lock); 259 260 return ret; 261 } 262 263 /* unpin, no longer being scanned out: */ 264 void omap_framebuffer_unpin(struct drm_framebuffer *fb) 265 { 266 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 267 int i, n = fb->format->num_planes; 268 269 mutex_lock(&omap_fb->lock); 270 271 omap_fb->pin_count--; 272 273 if (omap_fb->pin_count > 0) { 274 mutex_unlock(&omap_fb->lock); 275 return; 276 } 277 278 for (i = 0; i < n; i++) { 279 struct plane *plane = &omap_fb->planes[i]; 280 omap_gem_unpin(fb->obj[i]); 281 plane->dma_addr = 0; 282 } 283 284 mutex_unlock(&omap_fb->lock); 285 } 286 287 #ifdef CONFIG_DEBUG_FS 288 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 289 { 290 int i, n = fb->format->num_planes; 291 292 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height, 293 (char *)&fb->format->format); 294 295 for (i = 0; i < n; i++) { 296 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 297 i, fb->offsets[n], fb->pitches[i]); 298 omap_gem_describe(fb->obj[i], m); 299 } 300 } 301 #endif 302 303 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev, 304 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 305 { 306 const struct drm_format_info *info = drm_get_format_info(dev, 307 mode_cmd); 308 unsigned int num_planes = info->num_planes; 309 struct drm_gem_object *bos[4]; 310 struct drm_framebuffer *fb; 311 int i; 312 313 for (i = 0; i < num_planes; i++) { 314 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 315 if (!bos[i]) { 316 fb = ERR_PTR(-ENOENT); 317 goto error; 318 } 319 } 320 321 fb = omap_framebuffer_init(dev, mode_cmd, bos); 322 if (IS_ERR(fb)) 323 goto error; 324 325 return fb; 326 327 error: 328 while (--i >= 0) 329 drm_gem_object_put(bos[i]); 330 331 return fb; 332 } 333 334 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev, 335 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 336 { 337 const struct drm_format_info *format = NULL; 338 struct omap_framebuffer *omap_fb = NULL; 339 struct drm_framebuffer *fb = NULL; 340 unsigned int pitch = mode_cmd->pitches[0]; 341 int ret, i; 342 343 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 344 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 345 (char *)&mode_cmd->pixel_format); 346 347 format = drm_get_format_info(dev, mode_cmd); 348 349 for (i = 0; i < ARRAY_SIZE(formats); i++) { 350 if (formats[i] == mode_cmd->pixel_format) 351 break; 352 } 353 354 if (!format || i == ARRAY_SIZE(formats)) { 355 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n", 356 (char *)&mode_cmd->pixel_format); 357 ret = -EINVAL; 358 goto fail; 359 } 360 361 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL); 362 if (!omap_fb) { 363 ret = -ENOMEM; 364 goto fail; 365 } 366 367 fb = &omap_fb->base; 368 omap_fb->format = format; 369 mutex_init(&omap_fb->lock); 370 371 /* 372 * The code below assumes that no format use more than two planes, and 373 * that the two planes of multiplane formats need the same number of 374 * bytes per pixel. 375 */ 376 if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) { 377 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n"); 378 ret = -EINVAL; 379 goto fail; 380 } 381 382 if (pitch % format->cpp[0]) { 383 dev_dbg(dev->dev, 384 "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n", 385 pitch, format->cpp[0]); 386 ret = -EINVAL; 387 goto fail; 388 } 389 390 for (i = 0; i < format->num_planes; i++) { 391 struct plane *plane = &omap_fb->planes[i]; 392 unsigned int vsub = i == 0 ? 1 : format->vsub; 393 unsigned int size; 394 395 size = pitch * mode_cmd->height / vsub; 396 397 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) { 398 dev_dbg(dev->dev, 399 "provided buffer object is too small! %zu < %d\n", 400 bos[i]->size - mode_cmd->offsets[i], size); 401 ret = -EINVAL; 402 goto fail; 403 } 404 405 fb->obj[i] = bos[i]; 406 plane->dma_addr = 0; 407 } 408 409 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 410 411 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs); 412 if (ret) { 413 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 414 goto fail; 415 } 416 417 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 418 419 return fb; 420 421 fail: 422 kfree(omap_fb); 423 424 return ERR_PTR(ret); 425 } 426