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Message-ID: <202505241244.A9oll6Fa-lkp@intel.com>
Date: Sat, 24 May 2025 12:30:01 +0800
From: kernel test robot <lkp@...el.com>
To: Dave Stevenson <dave.stevenson@...pberrypi.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org, Maxime Ripard <mripard@...nel.org>
Subject: drivers/gpu/drm/vc4/vc4_drv.c:303:8: warning: cast to smaller
integer type 'enum vc4_gen' from 'const void *'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 4856ebd997159f198e3177e515bda01143727463
commit: 56aa4c374dbf86d90b7c5aabdc8facbdd3321477 drm/vc4: Use of_device_get_match_data to set generation
date: 6 months ago
config: x86_64-buildonly-randconfig-2001-20250524 (https://download.01.org/0day-ci/archive/20250524/202505241244.A9oll6Fa-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250524/202505241244.A9oll6Fa-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505241244.A9oll6Fa-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from drivers/gpu/drm/vc4/vc4_drv.c:27:
In file included from include/linux/dma-mapping.h:11:
In file included from include/linux/scatterlist.h:8:
In file included from include/linux/mm.h:2213:
include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
>> drivers/gpu/drm/vc4/vc4_drv.c:303:8: warning: cast to smaller integer type 'enum vc4_gen' from 'const void *' [-Wvoid-pointer-to-enum-cast]
303 | gen = (enum vc4_gen)of_device_get_match_data(dev);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 warnings generated.
vim +303 drivers/gpu/drm/vc4/vc4_drv.c
288
289 static int vc4_drm_bind(struct device *dev)
290 {
291 struct platform_device *pdev = to_platform_device(dev);
292 const struct drm_driver *driver;
293 struct rpi_firmware *firmware = NULL;
294 struct drm_device *drm;
295 struct vc4_dev *vc4;
296 struct device_node *node;
297 struct drm_crtc *crtc;
298 enum vc4_gen gen;
299 int ret = 0;
300
301 dev->coherent_dma_mask = DMA_BIT_MASK(32);
302
> 303 gen = (enum vc4_gen)of_device_get_match_data(dev);
304
305 if (gen > VC4_GEN_4)
306 driver = &vc5_drm_driver;
307 else
308 driver = &vc4_drm_driver;
309
310 node = of_find_matching_node_and_match(NULL, vc4_dma_range_matches,
311 NULL);
312 if (node) {
313 ret = of_dma_configure(dev, node, true);
314 of_node_put(node);
315
316 if (ret)
317 return ret;
318 }
319
320 vc4 = devm_drm_dev_alloc(dev, driver, struct vc4_dev, base);
321 if (IS_ERR(vc4))
322 return PTR_ERR(vc4);
323 vc4->gen = gen;
324 vc4->dev = dev;
325
326 drm = &vc4->base;
327 platform_set_drvdata(pdev, drm);
328
329 if (gen == VC4_GEN_4) {
330 ret = drmm_mutex_init(drm, &vc4->bin_bo_lock);
331 if (ret)
332 goto err;
333
334 ret = vc4_bo_cache_init(drm);
335 if (ret)
336 goto err;
337 }
338
339 ret = drmm_mode_config_init(drm);
340 if (ret)
341 goto err;
342
343 if (gen == VC4_GEN_4) {
344 ret = vc4_gem_init(drm);
345 if (ret)
346 goto err;
347 }
348
349 node = of_find_compatible_node(NULL, NULL, "raspberrypi,bcm2835-firmware");
350 if (node) {
351 firmware = rpi_firmware_get(node);
352 of_node_put(node);
353
354 if (!firmware) {
355 ret = -EPROBE_DEFER;
356 goto err;
357 }
358 }
359
360 ret = aperture_remove_all_conflicting_devices(driver->name);
361 if (ret)
362 goto err;
363
364 if (firmware) {
365 ret = rpi_firmware_property(firmware,
366 RPI_FIRMWARE_NOTIFY_DISPLAY_DONE,
367 NULL, 0);
368 if (ret)
369 drm_warn(drm, "Couldn't stop firmware display driver: %d\n", ret);
370
371 rpi_firmware_put(firmware);
372 }
373
374 ret = component_bind_all(dev, drm);
375 if (ret)
376 goto err;
377
378 ret = devm_add_action_or_reset(dev, vc4_component_unbind_all, vc4);
379 if (ret)
380 goto err;
381
382 ret = vc4_plane_create_additional_planes(drm);
383 if (ret)
384 goto err;
385
386 ret = vc4_kms_load(drm);
387 if (ret < 0)
388 goto err;
389
390 drm_for_each_crtc(crtc, drm)
391 vc4_crtc_disable_at_boot(crtc);
392
393 ret = drm_dev_register(drm, 0);
394 if (ret < 0)
395 goto err;
396
397 drm_client_setup_with_fourcc(drm, DRM_FORMAT_RGB565);
398
399 return 0;
400
401 err:
402 platform_set_drvdata(pdev, NULL);
403 return ret;
404 }
405
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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