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, 135 struct omap_overlay_info *info, 136 struct omap_overlay_info *r_info) 137 { 138 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 139 const struct drm_format_info *format = omap_fb->format; 140 u32 x, y, orient = 0; 141 142 info->fourcc = fb->format->format; 143 144 info->pos_x = state->crtc_x; 145 info->pos_y = state->crtc_y; 146 info->out_width = state->crtc_w; 147 info->out_height = state->crtc_h; 148 info->width = state->src_w >> 16; 149 info->height = state->src_h >> 16; 150 151 /* DSS driver wants the w & h in rotated orientation */ 152 if (drm_rotation_90_or_270(state->rotation)) 153 swap(info->width, info->height); 154 155 x = state->src_x >> 16; 156 y = state->src_y >> 16; 157 158 if (omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK) { 159 u32 w = state->src_w >> 16; 160 u32 h = state->src_h >> 16; 161 162 orient = drm_rotation_to_tiler(state->rotation); 163 164 /* 165 * omap_gem_rotated_paddr() wants the x & y in tiler units. 166 * Usually tiler unit size is the same as the pixel size, except 167 * for YUV422 formats, for which the tiler unit size is 32 bits 168 * and pixel size is 16 bits. 169 */ 170 if (fb->format->format == DRM_FORMAT_UYVY || 171 fb->format->format == DRM_FORMAT_YUYV) { 172 x /= 2; 173 w /= 2; 174 } 175 176 /* adjust x,y offset for invert: */ 177 if (orient & MASK_Y_INVERT) 178 y += h - 1; 179 if (orient & MASK_X_INVERT) 180 x += w - 1; 181 182 /* Note: x and y are in TILER units, not pixels */ 183 omap_gem_rotated_dma_addr(fb->obj[0], orient, x, y, 184 &info->paddr); 185 info->rotation_type = OMAP_DSS_ROT_TILER; 186 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0; 187 /* Note: stride in TILER units, not pixels */ 188 info->screen_width = omap_gem_tiled_stride(fb->obj[0], orient); 189 } else { 190 switch (state->rotation & DRM_MODE_ROTATE_MASK) { 191 case 0: 192 case DRM_MODE_ROTATE_0: 193 /* OK */ 194 break; 195 196 default: 197 dev_warn(fb->dev->dev, 198 "rotation '%d' ignored for non-tiled fb\n", 199 state->rotation); 200 break; 201 } 202 203 info->paddr = get_linear_addr(fb, format, 0, x, y); 204 info->rotation_type = OMAP_DSS_ROT_NONE; 205 info->rotation = DRM_MODE_ROTATE_0; 206 info->screen_width = fb->pitches[0]; 207 } 208 209 /* convert to pixels: */ 210 info->screen_width /= format->cpp[0]; 211 212 if (fb->format->format == DRM_FORMAT_NV12) { 213 if (info->rotation_type == OMAP_DSS_ROT_TILER) { 214 WARN_ON(!(omap_gem_flags(fb->obj[1]) & OMAP_BO_TILED_MASK)); 215 omap_gem_rotated_dma_addr(fb->obj[1], orient, x/2, y/2, 216 &info->p_uv_addr); 217 } else { 218 info->p_uv_addr = get_linear_addr(fb, format, 1, x, y); 219 } 220 } else { 221 info->p_uv_addr = 0; 222 } 223 224 if (r_info) { 225 info->width /= 2; 226 info->out_width /= 2; 227 228 *r_info = *info; 229 230 if (fb->format->is_yuv) { 231 if (info->width & 1) { 232 info->width++; 233 r_info->width--; 234 } 235 236 if (info->out_width & 1) { 237 info->out_width++; 238 r_info->out_width--; 239 } 240 } 241 242 r_info->pos_x = info->pos_x + info->out_width; 243 244 r_info->paddr = get_linear_addr(fb, format, 0, 245 x + info->width, y); 246 if (fb->format->format == DRM_FORMAT_NV12) { 247 r_info->p_uv_addr = 248 get_linear_addr(fb, format, 1, 249 x + info->width, y); 250 } 251 } 252 } 253 254 /* pin, prepare for scanout: */ 255 int omap_framebuffer_pin(struct drm_framebuffer *fb) 256 { 257 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 258 int ret, i, n = fb->format->num_planes; 259 260 mutex_lock(&omap_fb->lock); 261 262 if (omap_fb->pin_count > 0) { 263 omap_fb->pin_count++; 264 mutex_unlock(&omap_fb->lock); 265 return 0; 266 } 267 268 for (i = 0; i < n; i++) { 269 struct plane *plane = &omap_fb->planes[i]; 270 ret = omap_gem_pin(fb->obj[i], &plane->dma_addr); 271 if (ret) 272 goto fail; 273 omap_gem_dma_sync_buffer(fb->obj[i], DMA_TO_DEVICE); 274 } 275 276 omap_fb->pin_count++; 277 278 mutex_unlock(&omap_fb->lock); 279 280 return 0; 281 282 fail: 283 for (i--; i >= 0; i--) { 284 struct plane *plane = &omap_fb->planes[i]; 285 omap_gem_unpin(fb->obj[i]); 286 plane->dma_addr = 0; 287 } 288 289 mutex_unlock(&omap_fb->lock); 290 291 return ret; 292 } 293 294 /* unpin, no longer being scanned out: */ 295 void omap_framebuffer_unpin(struct drm_framebuffer *fb) 296 { 297 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 298 int i, n = fb->format->num_planes; 299 300 mutex_lock(&omap_fb->lock); 301 302 omap_fb->pin_count--; 303 304 if (omap_fb->pin_count > 0) { 305 mutex_unlock(&omap_fb->lock); 306 return; 307 } 308 309 for (i = 0; i < n; i++) { 310 struct plane *plane = &omap_fb->planes[i]; 311 omap_gem_unpin(fb->obj[i]); 312 plane->dma_addr = 0; 313 } 314 315 mutex_unlock(&omap_fb->lock); 316 } 317 318 #ifdef CONFIG_DEBUG_FS 319 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 320 { 321 int i, n = fb->format->num_planes; 322 323 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height, 324 (char *)&fb->format->format); 325 326 for (i = 0; i < n; i++) { 327 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 328 i, fb->offsets[n], fb->pitches[i]); 329 omap_gem_describe(fb->obj[i], m); 330 } 331 } 332 #endif 333 334 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev, 335 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 336 { 337 const struct drm_format_info *info = drm_get_format_info(dev, 338 mode_cmd); 339 unsigned int num_planes = info->num_planes; 340 struct drm_gem_object *bos[4]; 341 struct drm_framebuffer *fb; 342 int i; 343 344 for (i = 0; i < num_planes; i++) { 345 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 346 if (!bos[i]) { 347 fb = ERR_PTR(-ENOENT); 348 goto error; 349 } 350 } 351 352 fb = omap_framebuffer_init(dev, mode_cmd, bos); 353 if (IS_ERR(fb)) 354 goto error; 355 356 return fb; 357 358 error: 359 while (--i >= 0) 360 drm_gem_object_put(bos[i]); 361 362 return fb; 363 } 364 365 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev, 366 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 367 { 368 const struct drm_format_info *format = NULL; 369 struct omap_framebuffer *omap_fb = NULL; 370 struct drm_framebuffer *fb = NULL; 371 unsigned int pitch = mode_cmd->pitches[0]; 372 int ret, i; 373 374 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 375 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 376 (char *)&mode_cmd->pixel_format); 377 378 format = drm_get_format_info(dev, mode_cmd); 379 380 for (i = 0; i < ARRAY_SIZE(formats); i++) { 381 if (formats[i] == mode_cmd->pixel_format) 382 break; 383 } 384 385 if (!format || i == ARRAY_SIZE(formats)) { 386 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n", 387 (char *)&mode_cmd->pixel_format); 388 ret = -EINVAL; 389 goto fail; 390 } 391 392 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL); 393 if (!omap_fb) { 394 ret = -ENOMEM; 395 goto fail; 396 } 397 398 fb = &omap_fb->base; 399 omap_fb->format = format; 400 mutex_init(&omap_fb->lock); 401 402 /* 403 * The code below assumes that no format use more than two planes, and 404 * that the two planes of multiplane formats need the same number of 405 * bytes per pixel. 406 */ 407 if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) { 408 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n"); 409 ret = -EINVAL; 410 goto fail; 411 } 412 413 if (pitch % format->cpp[0]) { 414 dev_dbg(dev->dev, 415 "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n", 416 pitch, format->cpp[0]); 417 ret = -EINVAL; 418 goto fail; 419 } 420 421 for (i = 0; i < format->num_planes; i++) { 422 struct plane *plane = &omap_fb->planes[i]; 423 unsigned int vsub = i == 0 ? 1 : format->vsub; 424 unsigned int size; 425 426 size = pitch * mode_cmd->height / vsub; 427 428 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) { 429 dev_dbg(dev->dev, 430 "provided buffer object is too small! %zu < %d\n", 431 bos[i]->size - mode_cmd->offsets[i], size); 432 ret = -EINVAL; 433 goto fail; 434 } 435 436 fb->obj[i] = bos[i]; 437 plane->dma_addr = 0; 438 } 439 440 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 441 442 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs); 443 if (ret) { 444 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 445 goto fail; 446 } 447 448 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 449 450 return fb; 451 452 fail: 453 kfree(omap_fb); 454 455 return ERR_PTR(ret); 456 } 457