[Intel-gfx] [PATCH v3 04/14] drm/edid: parse YCBCR 420 videomodes from EDID

[kbuild test robot]

Hi Shashank,

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on v4.12-rc5 next-20170616]
[cannot apply to drm/drm-next]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Shashank-Sharma/HDMI-YCBCR-output-handling-in-DRM-layer/20170617-023229
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: i386-randconfig-x070-06120530 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   In file included from drivers/gpu/drm/drm_edid.c:30:0:
   drivers/gpu/drm/drm_edid.c: In function 'drm_parse_y420cmdb_bitmap':
   include/linux/kernel.h:40:18: warning: large integer implicitly truncated to unsigned type [-Woverflow]
    #define U64_MAX  ((u64)~0ULL)
                     ^
>> drivers/gpu/drm/drm_edid.c:3630:28: note: in expansion of macro 'U64_MAX'
      hdmi->ycbcr420_vcb_map = U64_MAX;
                               ^~~~~~~

vim +/U64_MAX +3630 drivers/gpu/drm/drm_edid.c

  3614		for ((i) = (start); (i) < (end) && (i) + cea_db_payload_len(&(cea)[(i)]) < (end); (i) += cea_db_payload_len(&(cea)[(i)]) + 1)
  3615	
  3616	static void drm_parse_y420cmdb_bitmap(struct drm_connector *connector,
  3617					     const u8 *db)
  3618	{
  3619		struct drm_display_info *info = &connector->display_info;
  3620		struct drm_hdmi_info *hdmi = &info->hdmi;
  3621		u8 map_len = cea_db_payload_len(db) - 1;
  3622		u8 count;
  3623		u64 map = 0;
  3624	
  3625		if (!db)
  3626			return;
  3627	
  3628		if (map_len == 0) {
  3629			/* All CEA modes support ycbcr420 sampling also.*/
> 3630			hdmi->ycbcr420_vcb_map = U64_MAX;
  3631			info->color_formats |= DRM_COLOR_FORMAT_YCRCB420;
  3632			return;
  3633		}
  3634	
  3635		/*
  3636		 * This map indicates which of the existing CEA block modes
  3637		 * from VDB can support YCBCR420 output too. So if bit=0 is
  3638		 * set, first mode from VDB can support YCBCR420 output too.

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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