Re: [PATCH 5/6] drm/panel: simple: add support for Rocktech RK043FN48H panel

[kernel test robot]

Hi Dario,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-intel/for-linux-next-fixes]
[also build test WARNING on drm-tip/drm-tip linus/master v6.4-rc4 next-20230601]
[cannot apply to atorgue-stm32/stm32-next drm-misc/drm-misc-next drm-intel/for-linux-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Dario-Binacchi/ARM-dts-stm32-add-ltdc-support-on-stm32f746-MCU/20230602-010536
base:   git://anongit.freedesktop.org/drm-intel for-linux-next-fixes
patch link:    https://lore.kernel.org/r/20230601170320.2845218-6-dario.binacchi%40amarulasolutions.com
patch subject: [PATCH 5/6] drm/panel: simple: add support for Rocktech RK043FN48H panel
config: mips-allyesconfig (https://download.01.org/0day-ci/archive/20230602/202306020343.jNTWeM0P-lkp@xxxxxxxxx/config)
compiler: mips-linux-gcc (GCC) 12.3.0
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/5a692e898df9428078855c58f8e945def084613b
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Dario-Binacchi/ARM-dts-stm32-add-ltdc-support-on-stm32f746-MCU/20230602-010536
        git checkout 5a692e898df9428078855c58f8e945def084613b
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=mips olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/gpu/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306020343.jNTWeM0P-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/panel/panel-simple.c:3201:68: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses]
    3201 |         .flags = DISPLAY_FLAGS_VSYNC_LOW + DISPLAY_FLAGS_HSYNC_LOW |
         |                                                                    ^


vim +3201 drivers/gpu/drm/panel/panel-simple.c

  3190	
  3191	static const struct display_timing rocktech_rk043fn48h_timing = {
  3192		.pixelclock = { 6000000, 9000000, 12000000 },
  3193		.hactive = { 480, 480, 480 },
  3194		.hback_porch = { 8, 43, 43 },
  3195		.hfront_porch = { 2, 8, 8 },
  3196		.hsync_len = { 1, 1, 1 },
  3197		.vactive = { 272, 272, 272 },
  3198		.vback_porch = { 2, 12, 12 },
  3199		.vfront_porch = { 1, 4, 4 },
  3200		.vsync_len = { 1, 10, 10 },
> 3201		.flags = DISPLAY_FLAGS_VSYNC_LOW + DISPLAY_FLAGS_HSYNC_LOW |
  3202			 DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_POSEDGE,
  3203	};
  3204	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki