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 #include <linux/seq_file.h> 9 10 #include <drm/drm_blend.h> 11 #include <drm/drm_modeset_helper.h> 12 #include <drm/drm_fourcc.h> 13 #include <drm/drm_framebuffer.h> 14 #include <drm/drm_gem_framebuffer_helper.h> 15 #include <drm/drm_print.h> 16 17 #include "omap_dmm_tiler.h" 18 #include "omap_drv.h" 19 20 /* 21 * framebuffer funcs 22 */ 23 24 static const u32 formats[] = { 25 /* 16bpp [A]RGB: */ 26 DRM_FORMAT_RGB565, /* RGB16-565 */ 27 DRM_FORMAT_RGBX4444, /* RGB12x-4444 */ 28 DRM_FORMAT_XRGB4444, /* xRGB12-4444 */ 29 DRM_FORMAT_RGBA4444, /* RGBA12-4444 */ 30 DRM_FORMAT_ARGB4444, /* ARGB16-4444 */ 31 DRM_FORMAT_XRGB1555, /* xRGB15-1555 */ 32 DRM_FORMAT_ARGB1555, /* ARGB16-1555 */ 33 /* 24bpp RGB: */ 34 DRM_FORMAT_RGB888, /* RGB24-888 */ 35 /* 32bpp [A]RGB: */ 36 DRM_FORMAT_RGBX8888, /* RGBx24-8888 */ 37 DRM_FORMAT_XRGB8888, /* xRGB24-8888 */ 38 DRM_FORMAT_RGBA8888, /* RGBA32-8888 */ 39 DRM_FORMAT_ARGB8888, /* ARGB32-8888 */ 40 /* YUV: */ 41 DRM_FORMAT_NV12, 42 DRM_FORMAT_YUYV, 43 DRM_FORMAT_UYVY, 44 }; 45 46 /* per-plane info for the fb: */ 47 struct plane { 48 dma_addr_t dma_addr; 49 }; 50 51 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base) 52 53 struct omap_framebuffer { 54 struct drm_framebuffer base; 55 int pin_count; 56 const struct drm_format_info *format; 57 struct plane planes[2]; 58 /* lock for pinning (pin_count and planes.dma_addr) */ 59 struct mutex lock; 60 }; 61 62 static int omap_framebuffer_dirty(struct drm_framebuffer *fb, 63 struct drm_file *file_priv, 64 unsigned flags, unsigned color, 65 struct drm_clip_rect *clips, 66 unsigned num_clips) 67 { 68 struct drm_crtc *crtc; 69 70 drm_modeset_lock_all(fb->dev); 71 72 drm_for_each_crtc(crtc, fb->dev) 73 omap_crtc_flush(crtc); 74 75 drm_modeset_unlock_all(fb->dev); 76 77 return 0; 78 } 79 80 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = { 81 .create_handle = drm_gem_fb_create_handle, 82 .dirty = omap_framebuffer_dirty, 83 .destroy = drm_gem_fb_destroy, 84 }; 85 86 static u32 get_linear_addr(struct drm_framebuffer *fb, 87 const struct drm_format_info *format, int n, int x, int y) 88 { 89 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 90 struct plane *plane = &omap_fb->planes[n]; 91 u32 offset; 92 93 offset = fb->offsets[n] 94 + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub)) 95 + (y * fb->pitches[n] / (n == 0 ? 1 : format->vsub)); 96 97 return plane->dma_addr + offset; 98 } 99 100 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb) 101 { 102 return omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK; 103 } 104 105 /* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */ 106 static u32 drm_rotation_to_tiler(unsigned int drm_rot) 107 { 108 u32 orient; 109 110 switch (drm_rot & DRM_MODE_ROTATE_MASK) { 111 default: 112 case DRM_MODE_ROTATE_0: 113 orient = 0; 114 break; 115 case DRM_MODE_ROTATE_90: 116 orient = MASK_XY_FLIP | MASK_X_INVERT; 117 break; 118 case DRM_MODE_ROTATE_180: 119 orient = MASK_X_INVERT | MASK_Y_INVERT; 120 break; 121 case DRM_MODE_ROTATE_270: 122 orient = MASK_XY_FLIP | MASK_Y_INVERT; 123 break; 124 } 125 126 if (drm_rot & DRM_MODE_REFLECT_X) 127 orient ^= MASK_X_INVERT; 128 129 if (drm_rot & DRM_MODE_REFLECT_Y) 130 orient ^= MASK_Y_INVERT; 131 132 return orient; 133 } 134 135 /* update ovl info for scanout, handles cases of multi-planar fb's, etc. 136 */ 137 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb, 138 struct drm_plane_state *state, 139 struct omap_overlay_info *info, 140 struct omap_overlay_info *r_info) 141 { 142 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 143 const struct drm_format_info *format = omap_fb->format; 144 u32 x, y, orient = 0; 145 146 info->fourcc = fb->format->format; 147 148 info->pos_x = state->crtc_x; 149 info->pos_y = state->crtc_y; 150 info->out_width = state->crtc_w; 151 info->out_height = state->crtc_h; 152 info->width = state->src_w >> 16; 153 info->height = state->src_h >> 16; 154 155 /* DSS driver wants the w & h in rotated orientation */ 156 if (drm_rotation_90_or_270(state->rotation)) 157 swap(info->width, info->height); 158 159 x = state->src_x >> 16; 160 y = state->src_y >> 16; 161 162 if (omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK) { 163 u32 w = state->src_w >> 16; 164 u32 h = state->src_h >> 16; 165 166 orient = drm_rotation_to_tiler(state->rotation); 167 168 /* 169 * omap_gem_rotated_paddr() wants the x & y in tiler units. 170 * Usually tiler unit size is the same as the pixel size, except 171 * for YUV422 formats, for which the tiler unit size is 32 bits 172 * and pixel size is 16 bits. 173 */ 174 if (fb->format->format == DRM_FORMAT_UYVY || 175 fb->format->format == DRM_FORMAT_YUYV) { 176 x /= 2; 177 w /= 2; 178 } 179 180 /* adjust x,y offset for invert: */ 181 if (orient & MASK_Y_INVERT) 182 y += h - 1; 183 if (orient & MASK_X_INVERT) 184 x += w - 1; 185 186 /* Note: x and y are in TILER units, not pixels */ 187 omap_gem_rotated_dma_addr(fb->obj[0], orient, x, y, 188 &info->paddr); 189 info->rotation_type = OMAP_DSS_ROT_TILER; 190 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0; 191 /* Note: stride in TILER units, not pixels */ 192 info->screen_width = omap_gem_tiled_stride(fb->obj[0], orient); 193 } else { 194 switch (state->rotation & DRM_MODE_ROTATE_MASK) { 195 case 0: 196 case DRM_MODE_ROTATE_0: 197 /* OK */ 198 break; 199 200 default: 201 dev_warn(fb->dev->dev, 202 "rotation '%d' ignored for non-tiled fb\n", 203 state->rotation); 204 break; 205 } 206 207 info->paddr = get_linear_addr(fb, format, 0, x, y); 208 info->rotation_type = OMAP_DSS_ROT_NONE; 209 info->rotation = DRM_MODE_ROTATE_0; 210 info->screen_width = fb->pitches[0]; 211 } 212 213 /* convert to pixels: */ 214 info->screen_width /= format->cpp[0]; 215 216 if (fb->format->format == DRM_FORMAT_NV12) { 217 if (info->rotation_type == OMAP_DSS_ROT_TILER) { 218 WARN_ON(!(omap_gem_flags(fb->obj[1]) & OMAP_BO_TILED_MASK)); 219 omap_gem_rotated_dma_addr(fb->obj[1], orient, x/2, y/2, 220 &info->p_uv_addr); 221 } else { 222 info->p_uv_addr = get_linear_addr(fb, format, 1, x, y); 223 } 224 } else { 225 info->p_uv_addr = 0; 226 } 227 228 if (r_info) { 229 info->width /= 2; 230 info->out_width /= 2; 231 232 *r_info = *info; 233 234 if (fb->format->is_yuv) { 235 if (info->width & 1) { 236 info->width++; 237 r_info->width--; 238 } 239 240 if (info->out_width & 1) { 241 info->out_width++; 242 r_info->out_width--; 243 } 244 } 245 246 r_info->pos_x = info->pos_x + info->out_width; 247 248 r_info->paddr = get_linear_addr(fb, format, 0, 249 x + info->width, y); 250 if (fb->format->format == DRM_FORMAT_NV12) { 251 r_info->p_uv_addr = 252 get_linear_addr(fb, format, 1, 253 x + info->width, y); 254 } 255 } 256 } 257 258 /* pin, prepare for scanout: */ 259 int omap_framebuffer_pin(struct drm_framebuffer *fb) 260 { 261 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 262 int ret, i, n = fb->format->num_planes; 263 264 mutex_lock(&omap_fb->lock); 265 266 if (omap_fb->pin_count > 0) { 267 omap_fb->pin_count++; 268 mutex_unlock(&omap_fb->lock); 269 return 0; 270 } 271 272 for (i = 0; i < n; i++) { 273 struct plane *plane = &omap_fb->planes[i]; 274 ret = omap_gem_pin(fb->obj[i], &plane->dma_addr); 275 if (ret) 276 goto fail; 277 omap_gem_dma_sync_buffer(fb->obj[i], DMA_TO_DEVICE); 278 } 279 280 omap_fb->pin_count++; 281 282 mutex_unlock(&omap_fb->lock); 283 284 return 0; 285 286 fail: 287 for (i--; i >= 0; i--) { 288 struct plane *plane = &omap_fb->planes[i]; 289 omap_gem_unpin(fb->obj[i]); 290 plane->dma_addr = 0; 291 } 292 293 mutex_unlock(&omap_fb->lock); 294 295 return ret; 296 } 297 298 /* unpin, no longer being scanned out: */ 299 void omap_framebuffer_unpin(struct drm_framebuffer *fb) 300 { 301 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 302 int i, n = fb->format->num_planes; 303 304 mutex_lock(&omap_fb->lock); 305 306 omap_fb->pin_count--; 307 308 if (omap_fb->pin_count > 0) { 309 mutex_unlock(&omap_fb->lock); 310 return; 311 } 312 313 for (i = 0; i < n; i++) { 314 struct plane *plane = &omap_fb->planes[i]; 315 omap_gem_unpin(fb->obj[i]); 316 plane->dma_addr = 0; 317 } 318 319 mutex_unlock(&omap_fb->lock); 320 } 321 322 #ifdef CONFIG_DEBUG_FS 323 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 324 { 325 int i, n = fb->format->num_planes; 326 327 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height, 328 (char *)&fb->format->format); 329 330 for (i = 0; i < n; i++) { 331 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 332 i, fb->offsets[n], fb->pitches[i]); 333 omap_gem_describe(fb->obj[i], m); 334 } 335 } 336 #endif 337 338 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev, 339 struct drm_file *file, const struct drm_format_info *info, 340 const struct drm_mode_fb_cmd2 *mode_cmd) 341 { 342 unsigned int num_planes = info->num_planes; 343 struct drm_gem_object *bos[4]; 344 struct drm_framebuffer *fb; 345 int i; 346 347 for (i = 0; i < num_planes; i++) { 348 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 349 if (!bos[i]) { 350 fb = ERR_PTR(-ENOENT); 351 goto error; 352 } 353 } 354 355 fb = omap_framebuffer_init(dev, info, mode_cmd, bos); 356 if (IS_ERR(fb)) 357 goto error; 358 359 return fb; 360 361 error: 362 while (--i >= 0) 363 drm_gem_object_put(bos[i]); 364 365 return fb; 366 } 367 368 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev, 369 const struct drm_format_info *info, 370 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 371 { 372 struct omap_framebuffer *omap_fb = NULL; 373 struct drm_framebuffer *fb = NULL; 374 unsigned int pitch = mode_cmd->pitches[0]; 375 int ret, i; 376 377 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 378 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 379 (char *)&mode_cmd->pixel_format); 380 381 for (i = 0; i < ARRAY_SIZE(formats); i++) { 382 if (formats[i] == mode_cmd->pixel_format) 383 break; 384 } 385 386 if (i == ARRAY_SIZE(formats)) { 387 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n", 388 (char *)&mode_cmd->pixel_format); 389 ret = -EINVAL; 390 goto fail; 391 } 392 393 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL); 394 if (!omap_fb) { 395 ret = -ENOMEM; 396 goto fail; 397 } 398 399 fb = &omap_fb->base; 400 omap_fb->format = info; 401 mutex_init(&omap_fb->lock); 402 403 /* 404 * The code below assumes that no format use more than two planes, and 405 * that the two planes of multiplane formats need the same number of 406 * bytes per pixel. 407 */ 408 if (info->num_planes == 2 && pitch != mode_cmd->pitches[1]) { 409 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n"); 410 ret = -EINVAL; 411 goto fail; 412 } 413 414 if (pitch % info->cpp[0]) { 415 dev_dbg(dev->dev, 416 "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n", 417 pitch, info->cpp[0]); 418 ret = -EINVAL; 419 goto fail; 420 } 421 422 for (i = 0; i < info->num_planes; i++) { 423 struct plane *plane = &omap_fb->planes[i]; 424 unsigned int vsub = i == 0 ? 1 : info->vsub; 425 unsigned int size; 426 427 size = pitch * mode_cmd->height / vsub; 428 429 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) { 430 dev_dbg(dev->dev, 431 "provided buffer object is too small! %zu < %d\n", 432 bos[i]->size - mode_cmd->offsets[i], size); 433 ret = -EINVAL; 434 goto fail; 435 } 436 437 fb->obj[i] = bos[i]; 438 plane->dma_addr = 0; 439 } 440 441 drm_helper_mode_fill_fb_struct(dev, fb, info, mode_cmd); 442 443 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs); 444 if (ret) { 445 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 446 goto fail; 447 } 448 449 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 450 451 return fb; 452 453 fail: 454 kfree(omap_fb); 455 456 return ERR_PTR(ret); 457 } 458