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

[kernel test robot]

Hi Dmitry,

kernel test robot noticed the following build warnings:

[auto build test WARNING 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: i386-allmodconfig (https://download.01.org/0day-ci/archive/20241110/202411100456.0JcsAx2b-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241110/202411100456.0JcsAx2b-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202411100456.0JcsAx2b-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/vc4/vc4_hdmi.c: In function 'vc4_hdmi_encoder_mode_valid':
>> drivers/gpu/drm/vc4/vc4_hdmi.c:1762:68: warning: passing argument 2 of 'drm_hdmi_connector_mode_valid' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
    1762 |         return drm_hdmi_connector_mode_valid(&vc4_hdmi->connector, mode);
         |                                                                    ^~~~
   In file included from drivers/gpu/drm/vc4/vc4_hdmi.c:35:
   include/drm/display/drm_hdmi_state_helper.h:25:56: note: expected 'struct drm_display_mode *' but argument is of type 'const struct drm_display_mode *'
      25 |                               struct drm_display_mode *mode);
         |                               ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~


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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