Re: [Intel-gfx] [V3 7/7] drm/i915/dsi: Send proper brightness value via MIPI DCS command

From: kernel test robot <lkp@intel.com>
To: Lee Shawn C <shawn.c.lee@intel.com>, intel-gfx@lists.freedesktop.org
Cc: jani.nikula@intel.com, cooper.chiou@intel.com,
	kbuild-all@lists.01.org, william.tseng@intel.com
Subject: Re: [Intel-gfx] [V3 7/7] drm/i915/dsi: Send proper brightness value via MIPI DCS command
Date: Fri, 23 Jul 2021 19:14:32 +0800	[thread overview]
Message-ID: <202107231948.0xFLWXRi-lkp@intel.com> (raw)
In-Reply-To: <20210723070548.29315-8-shawn.c.lee@intel.com>

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Hi Lee,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on drm-tip/drm-tip v5.14-rc2 next-20210723]
[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]

url:    https://github.com/0day-ci/linux/commits/Lee-Shawn-C/MIPI-DSI-driver-enhancements/20210723-150019
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: x86_64-randconfig-s031-20210723 (attached as .config)
compiler: gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/3c3b297d0e553591be7fb6d5b66bb41cf23bff42
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Lee-Shawn-C/MIPI-DSI-driver-enhancements/20210723-150019
        git checkout 3c3b297d0e553591be7fb6d5b66bb41cf23bff42
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c:69:20: sparse: sparse: incorrect type in initializer (different base types) @@     expected unsigned short [usertype] data @@     got restricted __be16 [usertype] @@
   drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c:69:20: sparse:     expected unsigned short [usertype] data
   drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c:69:20: sparse:     got restricted __be16 [usertype]

vim +69 drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c

    64	
    65	static void dcs_set_backlight(const struct drm_connector_state *conn_state, u32 level)
    66	{
    67		struct intel_dsi *intel_dsi = enc_to_intel_dsi(to_intel_encoder(conn_state->best_encoder));
    68		struct mipi_dsi_device *dsi_device;
  > 69		u16 data = cpu_to_be16(level);
    70		enum port port;
    71	
    72		for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) {
    73			dsi_device = intel_dsi->dsi_hosts[port]->device;
    74			mipi_dsi_dcs_write(dsi_device, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
    75					   &data, sizeof(data));
    76		}
    77	}
    78	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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