linux-kernel - drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c:69:20: sparse: sparse: incorrect type in initializer (different base types)

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Date:   Fri, 27 Aug 2021 01:23:09 +0800
From:   kernel test robot <lkp@...el.com>
To:     Lee Shawn C <shawn.c.lee@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        0day robot <lkp@...el.com>
Subject: drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c:69:20:
 sparse: sparse: incorrect type in initializer (different base types)

tree:   https://github.com/0day-ci/linux/commits/UPDATE-20210824-220043/Lee-Shawn-C/MIPI-DSI-driver-enhancements/20210812-234252
head:   58a94ed6aed682f6c0a500505f879d140da0a3ba
commit: 58a94ed6aed682f6c0a500505f879d140da0a3ba drm/i915/dsi: Send proper brightness value via MIPI DCS command
date:   2 days ago
config: x86_64-randconfig-s031-20210826 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-348-gf0e6938b-dirty
        # https://github.com/0day-ci/linux/commit/58a94ed6aed682f6c0a500505f879d140da0a3ba
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review UPDATE-20210824-220043/Lee-Shawn-C/MIPI-DSI-driver-enhancements/20210812-234252
        git checkout 58a94ed6aed682f6c0a500505f879d140da0a3ba
        # 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@...el.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

Download attachment ".config.gz" of type "application/gzip" (35550 bytes)