Hi Ankit, url: https://github.com/0day-ci/linux/commits/Ankit-Nautiyal/Add-support-for-DP-HDMI2-1-PCON/20201208-160027 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: i386-randconfig-m021-20201209 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> smatch warnings: drivers/gpu/drm/drm_dp_helper.c:3185 drm_dp_pcon_convert_rgb_to_ycbcr() warn: was && intended here instead of ||? vim +3185 drivers/gpu/drm/drm_dp_helper.c +int drm_dp_pcon_convert_rgb_to_ycbcr(struct drm_dp_aux *aux, u8 color_spc) +{ + int ret; + u8 buf; + + if (color_spc != DP_CONVERSION_BT601_RGB_YCBCR_ENABLE || + color_spc != DP_CONVERSION_BT709_RGB_YCBCR_ENABLE || + color_spc != DP_CONVERSION_BT2020_RGB_YCBCR_ENABLE) + return -EINVAL; "color_spc" cannot possibly be equal to three different values so this function will always return -EINVAL. + + ret = drm_dp_dpcd_readb(aux, DP_PROTOCOL_CONVERTER_CONTROL_2, &buf); + if (ret < 0) + return ret; + + buf |= color_spc; + ret = drm_dp_dpcd_writeb(aux, DP_PROTOCOL_CONVERTER_CONTROL_2, buf); + if (ret < 0) + return ret; + + return 0; +} --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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