Re: [PATCH v5 12/14] drm/bridge: imx: Add LDB support for i.MX8qxp

Hi Liu,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on shawnguo/for-next]
[also build test WARNING on robh/for-next drm-intel/for-linux-next drm-tip/drm-tip tegra-drm/drm/tegra/for-next linus/master drm-exynos/exynos-drm-next v5.12-rc2 next-20210310]
[cannot apply to drm/drm-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]

url:    https://github.com/0day-ci/linux/commits/Liu-Ying/Add-some-DRM-bridge-drivers-support-for-i-MX8qm-qxp-SoCs/20210310-181047
base:   https://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux.git for-next
config: mips-allyesconfig (attached as .config)
compiler: mips-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/e621f277f533f302da23441f28b3fc02a152a7df
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Liu-Ying/Add-some-DRM-bridge-drivers-support-for-i-MX8qm-qxp-SoCs/20210310-181047
        git checkout e621f277f533f302da23441f28b3fc02a152a7df
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All warnings (new ones prefixed by >>):

quoted

drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c:65:16: warning: 'struct phy_configure_opts_lvds' declared inside parameter list will not be visible outside of this definition or declaration

      65 |         struct phy_configure_opts_lvds *phy_cfg)
         |                ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c: In function 'imx8qxp_ldb_set_phy_cfg':
   drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c:67:9: error: dereferencing pointer to incomplete type 'struct phy_configure_opts_lvds'
      67 |  phy_cfg->bits_per_lane_and_dclk_cycle = 7;
         |         ^~
   drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c: In function 'imx8qxp_ldb_bridge_atomic_check':
   drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c:94:49: error: 'union phy_configure_opts' has no member named 'lvds'
      94 |  struct phy_configure_opts_lvds *phy_cfg = &opts.lvds;
         |                                                 ^
   drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c:102:57: error: passing argument 4 of 'imx8qxp_ldb_set_phy_cfg' from incompatible pointer type [-Werror=incompatible-pointer-types]
     102 |  imx8qxp_ldb_set_phy_cfg(imx8qxp_ldb, di_clk, is_split, phy_cfg);
         |                                                         ^~~~~~~
         |                                                         |
         |                                                         struct phy_configure_opts_lvds *
   drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c:65:41: note: expected 'struct phy_configure_opts_lvds *' but argument is of type 'struct phy_configure_opts_lvds *'
      65 |         struct phy_configure_opts_lvds *phy_cfg)
         |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
   drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c: In function 'imx8qxp_ldb_bridge_mode_set':
   drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c:136:49: error: 'union phy_configure_opts' has no member named 'lvds'
     136 |  struct phy_configure_opts_lvds *phy_cfg = &opts.lvds;
         |                                                 ^
   drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c:162:57: error: passing argument 4 of 'imx8qxp_ldb_set_phy_cfg' from incompatible pointer type [-Werror=incompatible-pointer-types]
     162 |  imx8qxp_ldb_set_phy_cfg(imx8qxp_ldb, di_clk, is_split, phy_cfg);
         |                                                         ^~~~~~~
         |                                                         |
         |                                                         struct phy_configure_opts_lvds *
   drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c:65:41: note: expected 'struct phy_configure_opts_lvds *' but argument is of type 'struct phy_configure_opts_lvds *'
      65 |         struct phy_configure_opts_lvds *phy_cfg)
         |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
   cc1: some warnings being treated as errors


vim +65 drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c

    62	
    63	static void imx8qxp_ldb_set_phy_cfg(struct imx8qxp_ldb *imx8qxp_ldb,
    64					    unsigned long di_clk, bool is_split,
  > 65					    struct phy_configure_opts_lvds *phy_cfg)
    66	{
    67		phy_cfg->bits_per_lane_and_dclk_cycle = 7;
    68		phy_cfg->lanes = 4;
    69	
    70		if (is_split) {
    71			phy_cfg->differential_clk_rate = di_clk / 2;
    72			phy_cfg->is_slave = !imx8qxp_ldb->companion;
    73		} else {
    74			phy_cfg->differential_clk_rate = di_clk;
    75			phy_cfg->is_slave = false;
    76		}
    77	}
    78	

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