Hi Dmitry, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm-tip/drm-tip] [also build test WARNING on next-20200828] [cannot apply to robh/for-next drm-intel/for-linux-next tegra-drm/drm/tegra/for-next linus/master drm-exynos/exynos-drm-next drm/drm-next v5.9-rc2] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Dmitry-Baryshkov/Add-LT9611UXC-DSI-to-HDMI-bridge-support/20200828-200735 base: git://anongit.freedesktop.org/drm/drm-tip drm-tip config: i386-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): drivers/gpu/drm/bridge/lontium-lt9611uxc.c: In function 'lt9611uxc_video_setup': >> drivers/gpu/drm/bridge/lontium-lt9611uxc.c:322:49: warning: variable 'vsync_porch' set but not used [-Wunused-but-set-variable] 322 | u32 v_total, vactive, vsync_len, vfront_porch, vsync_porch; | ^~~~~~~~~~~ >> drivers/gpu/drm/bridge/lontium-lt9611uxc.c:321:49: warning: variable 'hsync_porch' set but not used [-Wunused-but-set-variable] 321 | u32 h_total, hactive, hsync_len, hfront_porch, hsync_porch; | ^~~~~~~~~~~ drivers/gpu/drm/bridge/lontium-lt9611uxc.c: At top level: >> drivers/gpu/drm/bridge/lontium-lt9611uxc.c:473:14: warning: no previous prototype for 'lt9611uxc_bridge_get_edid' [-Wmissing-prototypes] 473 | struct edid *lt9611uxc_bridge_get_edid(struct drm_bridge *bridge, | ^~~~~~~~~~~~~~~~~~~~~~~~~ # https://github.com/0day-ci/linux/commit/f1b935d064fd8924137d420e75eb050c3d66c22b git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Dmitry-Baryshkov/Add-LT9611UXC-DSI-to-HDMI-bridge-support/20200828-200735 git checkout f1b935d064fd8924137d420e75eb050c3d66c22b vim +/vsync_porch +322 drivers/gpu/drm/bridge/lontium-lt9611uxc.c 317 318 static void lt9611uxc_video_setup(struct lt9611uxc *lt9611uxc, 319 const struct drm_display_mode *mode) 320 { > 321 u32 h_total, hactive, hsync_len, hfront_porch, hsync_porch; > 322 u32 v_total, vactive, vsync_len, vfront_porch, vsync_porch; 323 324 h_total = mode->htotal; 325 v_total = mode->vtotal; 326 327 hactive = mode->hdisplay; 328 hsync_len = mode->hsync_end - mode->hsync_start; 329 hfront_porch = mode->hsync_start - mode->hdisplay; 330 hsync_porch = hsync_len + mode->htotal - mode->hsync_end; 331 332 vactive = mode->vdisplay; 333 vsync_len = mode->vsync_end - mode->vsync_start; 334 vfront_porch = mode->vsync_start - mode->vdisplay; 335 vsync_porch = vsync_len + mode->vtotal - mode->vsync_end; 336 337 regmap_write(lt9611uxc->regmap, 0xd00d, (u8)(v_total / 256)); 338 regmap_write(lt9611uxc->regmap, 0xd00e, (u8)(v_total % 256)); 339 340 regmap_write(lt9611uxc->regmap, 0xd00f, (u8)(vactive / 256)); 341 regmap_write(lt9611uxc->regmap, 0xd010, (u8)(vactive % 256)); 342 343 regmap_write(lt9611uxc->regmap, 0xd011, (u8)(h_total / 256)); 344 regmap_write(lt9611uxc->regmap, 0xd012, (u8)(h_total % 256)); 345 346 regmap_write(lt9611uxc->regmap, 0xd013, (u8)(hactive / 256)); 347 regmap_write(lt9611uxc->regmap, 0xd014, (u8)(hactive % 256)); 348 349 regmap_write(lt9611uxc->regmap, 0xd015, (u8)(vsync_len % 256)); 350 351 regmap_update_bits(lt9611uxc->regmap, 0xd016, 0xf, (u8)(hsync_len / 256)); 352 regmap_write(lt9611uxc->regmap, 0xd017, (u8)(hsync_len % 256)); 353 354 regmap_update_bits(lt9611uxc->regmap, 0xd018, 0xf, (u8)(vfront_porch / 256)); 355 regmap_write(lt9611uxc->regmap, 0xd019, (u8)(vfront_porch % 256)); 356 357 regmap_update_bits(lt9611uxc->regmap, 0xd01a, 0xf, (u8)(hfront_porch / 256)); 358 regmap_write(lt9611uxc->regmap, 0xd01b, (u8)(hfront_porch % 256)); 359 } 360 361 static void lt9611uxc_bridge_mode_set(struct drm_bridge *bridge, 362 const struct drm_display_mode *mode, 363 const struct drm_display_mode *adj_mode) 364 { 365 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 366 367 if (lt9611uxc->sleep) 368 lt9611uxc_reset(lt9611uxc); 369 370 lt9611uxc_lock(lt9611uxc); 371 lt9611uxc_video_setup(lt9611uxc, mode); 372 lt9611uxc_unlock(lt9611uxc); 373 } 374 375 static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *bridge) 376 { 377 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 378 unsigned int reg_val = 0; 379 int ret; 380 int connected = 1; 381 382 if (lt9611uxc->hpd_supported) { 383 lt9611uxc_lock(lt9611uxc); 384 ret = regmap_read(lt9611uxc->regmap, 0xb023, ®_val); 385 lt9611uxc_unlock(lt9611uxc); 386 387 if (ret) 388 dev_err(lt9611uxc->dev, "failed to read hpd status: %d\n", ret); 389 else 390 connected = reg_val & BIT(1); 391 } 392 393 return connected ? connector_status_connected : 394 connector_status_disconnected; 395 } 396 397 static int lt9611uxc_bridge_get_modes(struct drm_bridge *bridge, 398 struct drm_connector *connector) 399 { 400 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 401 struct display_timings *timings = lt9611uxc->timings; 402 int i; 403 404 for (i = 0; i < timings->num_timings; i++) { 405 struct drm_display_mode *mode = drm_mode_create(bridge->dev); 406 struct videomode vm; 407 408 if (videomode_from_timings(timings, &vm, i)) 409 break; 410 411 drm_display_mode_from_videomode(&vm, mode); 412 413 mode->type = DRM_MODE_TYPE_DRIVER; 414 415 if (timings->native_mode == i) 416 mode->type |= DRM_MODE_TYPE_PREFERRED; 417 418 drm_mode_set_name(mode); 419 drm_mode_probed_add(connector, mode); 420 } 421 422 return i; 423 } 424 425 static int lt9611uxc_read_edid(struct lt9611uxc *lt9611uxc) 426 { 427 int ret = 0; 428 int i; 429 430 /* memset to clear old buffer, if any */ 431 memset(lt9611uxc->edid_buf, 0, sizeof(lt9611uxc->edid_buf)); 432 433 lt9611uxc_lock(lt9611uxc); 434 435 regmap_write(lt9611uxc->regmap, 0xb00b, 0x10); 436 437 #define EDID_SEG 16 438 for (i = 0; i < 2 * EDID_BLOCK_SIZE; i += EDID_SEG) { 439 regmap_write(lt9611uxc->regmap, 0xb00a, i); 440 ret = regmap_noinc_read(lt9611uxc->regmap, 0xb0b0, 441 <9611uxc->edid_buf[i], EDID_SEG); 442 if (ret < 0) 443 break; 444 } 445 446 lt9611uxc_unlock(lt9611uxc); 447 return ret; 448 } 449 450 static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len) 451 { 452 struct lt9611uxc *lt9611uxc = data; 453 int ret; 454 455 if (len > EDID_BLOCK_SIZE) 456 return -EINVAL; 457 458 if (block >= EDID_NUM_BLOCKS) 459 return -EINVAL; 460 461 if (block == 0) { 462 ret = lt9611uxc_read_edid(lt9611uxc); 463 if (ret) { 464 dev_err(lt9611uxc->dev, "edid read failed\n"); 465 return ret; 466 } 467 } 468 469 memcpy(buf, lt9611uxc->edid_buf + block * EDID_BLOCK_SIZE, len); 470 return 0; 471 }; 472 > 473 struct edid *lt9611uxc_bridge_get_edid(struct drm_bridge *bridge, 474 struct drm_connector *connector) 475 { 476 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 477 478 return drm_do_get_edid(connector, lt9611uxc_get_edid_block, lt9611uxc); 479 } 480 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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