Re: [PATCH v3 3/7] drm/vc4: use drm_hdmi_connector_mode_valid()

[kernel test robot <lkp@intel.com>]

Hi Dmitry,

kernel test robot noticed the following build errors:

[auto build test ERROR on 929beafbe7acce3267c06115e13e03ff6e50548a]

url:    https://github.com/intel-lab-lkp/linux/commits/Dmitry-Baryshkov/drm-display-hdmi-add-generic-mode_valid-helper/20241109-203557
base:   929beafbe7acce3267c06115e13e03ff6e50548a
patch link:    https://lore.kernel.org/r/20241109-hdmi-mode-valid-v3-3-5348c2368076%40linaro.org
patch subject: [PATCH v3 3/7] drm/vc4: use drm_hdmi_connector_mode_valid()
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20241110/202411100659.T6WKBFbI-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241110/202411100659.T6WKBFbI-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/202411100659.T6WKBFbI-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/gpu/drm/vc4/vc4_hdmi.c:37:
   In file included from include/drm/drm_atomic_helper.h:31:
   In file included from include/drm/drm_crtc.h:32:
   In file included from include/drm/drm_modes.h:33:
   In file included from include/drm/drm_connector.h:32:
   In file included from include/drm/drm_util.h:36:
   In file included from include/linux/kgdb.h:19:
   In file included from include/linux/kprobes.h:28:
   In file included from include/linux/ftrace.h:13:
   In file included from include/linux/kallsyms.h:13:
   In file included from include/linux/mm.h:2223:
   include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     504 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     505 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     511 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     512 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   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_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     524 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     525 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/vc4/vc4_hdmi.c:1762:61: error: passing 'const struct drm_display_mode *' to parameter of type 'struct drm_display_mode *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
    1762 |         return drm_hdmi_connector_mode_valid(&vc4_hdmi->connector, mode);
         |                                                                    ^~~~
   include/drm/display/drm_hdmi_state_helper.h:25:35: note: passing argument to parameter 'mode' here
      25 |                               struct drm_display_mode *mode);
         |                                                        ^
   4 warnings and 1 error generated.


vim +1762 drivers/gpu/drm/vc4/vc4_hdmi.c

  1749	
  1750	static enum drm_mode_status
  1751	vc4_hdmi_encoder_mode_valid(struct drm_encoder *encoder,
  1752				    const struct drm_display_mode *mode)
  1753	{
  1754		struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
  1755	
  1756		if (vc4_hdmi->variant->unsupported_odd_h_timings &&
  1757		    !(mode->flags & DRM_MODE_FLAG_DBLCLK) &&
  1758		    ((mode->hdisplay % 2) || (mode->hsync_start % 2) ||
  1759		     (mode->hsync_end % 2) || (mode->htotal % 2)))
  1760			return MODE_H_ILLEGAL;
  1761	
> 1762		return drm_hdmi_connector_mode_valid(&vc4_hdmi->connector, mode);
  1763	}
  1764	

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