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_blend.h> 10 #include <drm/drm_modeset_helper.h> 11 #include <drm/drm_fourcc.h> 12 #include <drm/drm_framebuffer.h> 13 #include <drm/drm_gem_framebuffer_helper.h> 14 15 #include "omap_dmm_tiler.h" 16 #include "omap_drv.h" 17 18 /* 19 * framebuffer funcs 20 */ 21 22 static const u32 formats[] = { 23 /* 16bpp [A]RGB: */ 24 DRM_FORMAT_RGB565, /* RGB16-565 */ 25 DRM_FORMAT_RGBX4444, /* RGB12x-4444 */ 26 DRM_FORMAT_XRGB4444, /* xRGB12-4444 */ 27 DRM_FORMAT_RGBA4444, /* RGBA12-4444 */ 28 DRM_FORMAT_ARGB4444, /* ARGB16-4444 */ 29 DRM_FORMAT_XRGB1555, /* xRGB15-1555 */ 30 DRM_FORMAT_ARGB1555, /* ARGB16-1555 */ 31 /* 24bpp RGB: */ 32 DRM_FORMAT_RGB888, /* RGB24-888 */ 33 /* 32bpp [A]RGB: */ 34 DRM_FORMAT_RGBX8888, /* RGBx24-8888 */ 35 DRM_FORMAT_XRGB8888, /* xRGB24-8888 */ 36 DRM_FORMAT_RGBA8888, /* RGBA32-8888 */ 37 DRM_FORMAT_ARGB8888, /* ARGB32-8888 */ 38 /* YUV: */ 39 DRM_FORMAT_NV12, 40 DRM_FORMAT_YUYV, 41 DRM_FORMAT_UYVY, 42 }; 43 44 /* per-plane info for the fb: */ 45 struct plane { 46 dma_addr_t dma_addr; 47 }; 48 49 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base) 50 51 struct omap_framebuffer { 52 struct drm_framebuffer base; 53 int pin_count; 54 const struct drm_format_info *format; 55 struct plane planes[2]; 56 /* lock for pinning (pin_count and planes.dma_addr) */ 57 struct mutex lock; 58 }; 59 60 static int omap_framebuffer_dirty(struct drm_framebuffer *fb, 61 struct drm_file *file_priv, 62 unsigned flags, unsigned color, 63 struct drm_clip_rect *clips, 64 unsigned num_clips) 65 { 66 struct drm_crtc *crtc; 67 68 drm_modeset_lock_all(fb->dev); 69 70 drm_for_each_crtc(crtc, fb->dev) 71 omap_crtc_flush(crtc); 72 73 drm_modeset_unlock_all(fb->dev); 74 75 return 0; 76 } 77 78 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = { 79 .create_handle = drm_gem_fb_create_handle, 80 .dirty = omap_framebuffer_dirty, 81 .destroy = drm_gem_fb_destroy, 82 }; 83 84 static u32 get_linear_addr(struct drm_framebuffer *fb, 85 const struct drm_format_info *format, int n, int x, int y) 86 { 87 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 88 struct plane *plane = &omap_fb->planes[n]; 89 u32 offset; 90 91 offset = fb->offsets[n] 92 + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub)) 93 + (y * fb->pitches[n] / (n == 0 ? 1 : format->vsub)); 94 95 return plane->dma_addr + offset; 96 } 97 98 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb) 99 { 100 return omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK; 101 } 102 103 /* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */ 104 static u32 drm_rotation_to_tiler(unsigned int drm_rot) 105 { 106 u32 orient; 107 108 switch (drm_rot & DRM_MODE_ROTATE_MASK) { 109 default: 110 case DRM_MODE_ROTATE_0: 111 orient = 0; 112 break; 113 case DRM_MODE_ROTATE_90: 114 orient = MASK_XY_FLIP | MASK_X_INVERT; 115 break; 116 case DRM_MODE_ROTATE_180: 117 orient = MASK_X_INVERT | MASK_Y_INVERT; 118 break; 119 case DRM_MODE_ROTATE_270: 120 orient = MASK_XY_FLIP | MASK_Y_INVERT; 121 break; 122 } 123 124 if (drm_rot & DRM_MODE_REFLECT_X) 125 orient ^= MASK_X_INVERT; 126 127 if (drm_rot & DRM_MODE_REFLECT_Y) 128 orient ^= MASK_Y_INVERT; 129 130 return orient; 131 } 132 133 /* update ovl info for scanout, handles cases of multi-planar fb's, etc. 134 */ 135 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb, 136 struct drm_plane_state *state, 137 struct omap_overlay_info *info, 138 struct omap_overlay_info *r_info) 139 { 140 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 141 const struct drm_format_info *format = omap_fb->format; 142 u32 x, y, orient = 0; 143 144 info->fourcc = fb->format->format; 145 146 info->pos_x = state->crtc_x; 147 info->pos_y = state->crtc_y; 148 info->out_width = state->crtc_w; 149 info->out_height = state->crtc_h; 150 info->width = state->src_w >> 16; 151 info->height = state->src_h >> 16; 152 153 /* DSS driver wants the w & h in rotated orientation */ 154 if (drm_rotation_90_or_270(state->rotation)) 155 swap(info->width, info->height); 156 157 x = state->src_x >> 16; 158 y = state->src_y >> 16; 159 160 if (omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK) { 161 u32 w = state->src_w >> 16; 162 u32 h = state->src_h >> 16; 163 164 orient = drm_rotation_to_tiler(state->rotation); 165 166 /* 167 * omap_gem_rotated_paddr() wants the x & y in tiler units. 168 * Usually tiler unit size is the same as the pixel size, except 169 * for YUV422 formats, for which the tiler unit size is 32 bits 170 * and pixel size is 16 bits. 171 */ 172 if (fb->format->format == DRM_FORMAT_UYVY || 173 fb->format->format == DRM_FORMAT_YUYV) { 174 x /= 2; 175 w /= 2; 176 } 177 178 /* adjust x,y offset for invert: */ 179 if (orient & MASK_Y_INVERT) 180 y += h - 1; 181 if (orient & MASK_X_INVERT) 182 x += w - 1; 183 184 /* Note: x and y are in TILER units, not pixels */ 185 omap_gem_rotated_dma_addr(fb->obj[0], orient, x, y, 186 &info->paddr); 187 info->rotation_type = OMAP_DSS_ROT_TILER; 188 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0; 189 /* Note: stride in TILER units, not pixels */ 190 info->screen_width = omap_gem_tiled_stride(fb->obj[0], orient); 191 } else { 192 switch (state->rotation & DRM_MODE_ROTATE_MASK) { 193 case 0: 194 case DRM_MODE_ROTATE_0: 195 /* OK */ 196 break; 197 198 default: 199 dev_warn(fb->dev->dev, 200 "rotation '%d' ignored for non-tiled fb\n", 201 state->rotation); 202 break; 203 } 204 205 info->paddr = get_linear_addr(fb, format, 0, x, y); 206 info->rotation_type = OMAP_DSS_ROT_NONE; 207 info->rotation = DRM_MODE_ROTATE_0; 208 info->screen_width = fb->pitches[0]; 209 } 210 211 /* convert to pixels: */ 212 info->screen_width /= format->cpp[0]; 213 214 if (fb->format->format == DRM_FORMAT_NV12) { 215 if (info->rotation_type == OMAP_DSS_ROT_TILER) { 216 WARN_ON(!(omap_gem_flags(fb->obj[1]) & OMAP_BO_TILED_MASK)); 217 omap_gem_rotated_dma_addr(fb->obj[1], orient, x/2, y/2, 218 &info->p_uv_addr); 219 } else { 220 info->p_uv_addr = get_linear_addr(fb, format, 1, x, y); 221 } 222 } else { 223 info->p_uv_addr = 0; 224 } 225 226 if (r_info) { 227 info->width /= 2; 228 info->out_width /= 2; 229 230 *r_info = *info; 231 232 if (fb->format->is_yuv) { 233 if (info->width & 1) { 234 info->width++; 235 r_info->width--; 236 } 237 238 if (info->out_width & 1) { 239 info->out_width++; 240 r_info->out_width--; 241 } 242 } 243 244 r_info->pos_x = info->pos_x + info->out_width; 245 246 r_info->paddr = get_linear_addr(fb, format, 0, 247 x + info->width, y); 248 if (fb->format->format == DRM_FORMAT_NV12) { 249 r_info->p_uv_addr = 250 get_linear_addr(fb, format, 1, 251 x + info->width, y); 252 } 253 } 254 } 255 256 /* pin, prepare for scanout: */ 257 int omap_framebuffer_pin(struct drm_framebuffer *fb) 258 { 259 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 260 int ret, i, n = fb->format->num_planes; 261 262 mutex_lock(&omap_fb->lock); 263 264 if (omap_fb->pin_count > 0) { 265 omap_fb->pin_count++; 266 mutex_unlock(&omap_fb->lock); 267 return 0; 268 } 269 270 for (i = 0; i < n; i++) { 271 struct plane *plane = &omap_fb->planes[i]; 272 ret = omap_gem_pin(fb->obj[i], &plane->dma_addr); 273 if (ret) 274 goto fail; 275 omap_gem_dma_sync_buffer(fb->obj[i], DMA_TO_DEVICE); 276 } 277 278 omap_fb->pin_count++; 279 280 mutex_unlock(&omap_fb->lock); 281 282 return 0; 283 284 fail: 285 for (i--; i >= 0; i--) { 286 struct plane *plane = &omap_fb->planes[i]; 287 omap_gem_unpin(fb->obj[i]); 288 plane->dma_addr = 0; 289 } 290 291 mutex_unlock(&omap_fb->lock); 292 293 return ret; 294 } 295 296 /* unpin, no longer being scanned out: */ 297 void omap_framebuffer_unpin(struct drm_framebuffer *fb) 298 { 299 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 300 int i, n = fb->format->num_planes; 301 302 mutex_lock(&omap_fb->lock); 303 304 omap_fb->pin_count--; 305 306 if (omap_fb->pin_count > 0) { 307 mutex_unlock(&omap_fb->lock); 308 return; 309 } 310 311 for (i = 0; i < n; i++) { 312 struct plane *plane = &omap_fb->planes[i]; 313 omap_gem_unpin(fb->obj[i]); 314 plane->dma_addr = 0; 315 } 316 317 mutex_unlock(&omap_fb->lock); 318 } 319 320 #ifdef CONFIG_DEBUG_FS 321 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 322 { 323 int i, n = fb->format->num_planes; 324 325 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height, 326 (char *)&fb->format->format); 327 328 for (i = 0; i < n; i++) { 329 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 330 i, fb->offsets[n], fb->pitches[i]); 331 omap_gem_describe(fb->obj[i], m); 332 } 333 } 334 #endif 335 336 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev, 337 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 338 { 339 const struct drm_format_info *info = drm_get_format_info(dev, 340 mode_cmd); 341 unsigned int num_planes = info->num_planes; 342 struct drm_gem_object *bos[4]; 343 struct drm_framebuffer *fb; 344 int i; 345 346 for (i = 0; i < num_planes; i++) { 347 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 348 if (!bos[i]) { 349 fb = ERR_PTR(-ENOENT); 350 goto error; 351 } 352 } 353 354 fb = omap_framebuffer_init(dev, mode_cmd, bos); 355 if (IS_ERR(fb)) 356 goto error; 357 358 return fb; 359 360 error: 361 while (--i >= 0) 362 drm_gem_object_put(bos[i]); 363 364 return fb; 365 } 366 367 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev, 368 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 369 { 370 const struct drm_format_info *format = NULL; 371 struct omap_framebuffer *omap_fb = NULL; 372 struct drm_framebuffer *fb = NULL; 373 unsigned int pitch = mode_cmd->pitches[0]; 374 int ret, i; 375 376 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 377 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 378 (char *)&mode_cmd->pixel_format); 379 380 format = drm_get_format_info(dev, mode_cmd); 381 382 for (i = 0; i < ARRAY_SIZE(formats); i++) { 383 if (formats[i] == mode_cmd->pixel_format) 384 break; 385 } 386 387 if (!format || i == ARRAY_SIZE(formats)) { 388 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n", 389 (char *)&mode_cmd->pixel_format); 390 ret = -EINVAL; 391 goto fail; 392 } 393 394 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL); 395 if (!omap_fb) { 396 ret = -ENOMEM; 397 goto fail; 398 } 399 400 fb = &omap_fb->base; 401 omap_fb->format = format; 402 mutex_init(&omap_fb->lock); 403 404 /* 405 * The code below assumes that no format use more than two planes, and 406 * that the two planes of multiplane formats need the same number of 407 * bytes per pixel. 408 */ 409 if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) { 410 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n"); 411 ret = -EINVAL; 412 goto fail; 413 } 414 415 if (pitch % format->cpp[0]) { 416 dev_dbg(dev->dev, 417 "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n", 418 pitch, format->cpp[0]); 419 ret = -EINVAL; 420 goto fail; 421 } 422 423 for (i = 0; i < format->num_planes; i++) { 424 struct plane *plane = &omap_fb->planes[i]; 425 unsigned int vsub = i == 0 ? 1 : format->vsub; 426 unsigned int size; 427 428 size = pitch * mode_cmd->height / vsub; 429 430 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) { 431 dev_dbg(dev->dev, 432 "provided buffer object is too small! %zu < %d\n", 433 bos[i]->size - mode_cmd->offsets[i], size); 434 ret = -EINVAL; 435 goto fail; 436 } 437 438 fb->obj[i] = bos[i]; 439 plane->dma_addr = 0; 440 } 441 442 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 443 444 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs); 445 if (ret) { 446 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 447 goto fail; 448 } 449 450 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 451 452 return fb; 453 454 fail: 455 kfree(omap_fb); 456 457 return ERR_PTR(ret); 458 } 459