Re: [PATCH v2 05/11] drm/panel: Add panel driver for Samsung SOFEF01 DDIC

kernel test robot
2025-12-24T16:14:40Z

Hi Marijn,

kernel test robot noticed the following build warnings:

[auto build test WARNING on cc3aa43b44bdb43dfbac0fcb51c56594a11338a8]

url: https://github.com/intel-lab-lkp/linux/commits/Marijn-Suijten/drm-panel-Clean-up-SOFEF00-config-dependencies/20251222-073548
base: cc3aa43b44bdb43dfbac0fcb51c56594a11338a8
patch link: https://lore.kernel.org/r/20251222-drm-panels-sony-v2-5-82a87465d163%40somainline.org
patch subject: [PATCH v2 05/11] drm/panel: Add panel driver for Samsung SOFEF01 DDIC
config: riscv-allyesconfig (https://download.01.org/0day-ci/archive/20251224/202512242356.EwESE8Qv-lkp@intel.com/config)
compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251224/202512242356.EwESE8Qv-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512242356.EwESE8Qv-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/panel/panel-samsung-sofef01.c:389:20: warning: cast to smaller integer type 'enum panel_type' from 'const void *' [-Wvoid-pointer-to-enum-cast]
ctx->panel_type = (enum panel_type)of_device_get_match_data(dev);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.

vim +389 drivers/gpu/drm/panel/panel-samsung-sofef01.c

357
358 static int samsung_sofef01_m_probe(struct mipi_dsi_device *dsi)
359 {
360 const struct backlight_properties props = {
361 .type = BACKLIGHT_RAW,
362 .brightness = 100,
363 .max_brightness = 1023,
364 };
365 struct device *dev = &dsi->dev;
366 struct samsung_sofef01_m *ctx;
367 int ret;
368
369 ctx = devm_drm_panel_alloc(dev, struct samsung_sofef01_m, panel,
370 &samsung_sofef01_m_panel_funcs,
371 DRM_MODE_CONNECTOR_DSI);
372 if (IS_ERR(ctx))
373 return PTR_ERR(ctx);
374
375 ret = devm_regulator_bulk_get_const(
376 dev,
377 ARRAY_SIZE(samsung_sofef01_m_supplies),
378 samsung_sofef01_m_supplies,
379 &ctx->supplies);
380 if (ret < 0)
381 return dev_err_probe(dev, ret, "Failed to get regulators\n");
382
383 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
384 if (IS_ERR(ctx->reset_gpio))
385 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
386 "Failed to get reset-gpios\n");
387
388 ctx->dsi = dsi;
> 389 ctx->panel_type = (enum panel_type)of_device_get_match_data(dev);
390 if (ctx->panel_type == PANEL_TYPE_TC01)
391 ctx->mode = &samsung_sofef01_m_61_142_mode;
392 else if (ctx->panel_type == PANEL_TYPE_DK01)
393 ctx->mode = &samsung_sofef01_m_61_141_mode;
394 else
395 ctx->mode = &samsung_sofef01_m_60_139_mode;
396 mipi_dsi_set_drvdata(dsi, ctx);
397
398 dsi->lanes = 4;
399 dsi->format = MIPI_DSI_FMT_RGB888;
400 dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS;
401
402 ctx->panel.prepare_prev_first = true;
403
404 ctx->panel.backlight = devm_backlight_device_register(
405 dev, dev_name(dev), dev, dsi,
406 &samsung_sofef01_m_bl_ops,
407 &props);
408 if (IS_ERR(ctx->panel.backlight))
409 return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
410 "Failed to create backlight\n");
411
412 drm_panel_add(&ctx->panel);
413
414 ret = mipi_dsi_attach(dsi);
415 if (ret < 0) {
416 dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
417 drm_panel_remove(&ctx->panel);
418 return ret;
419 }
420
421 return 0;
422 }
423

--
0-DAY CI Kernel Test Service