[PATCH v1 2/3] drm/msm/edp: add support for next gen edp

[kernel test robot]

Hi Sankeerth,

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 drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next linus/master v5.12 next-20210505]
[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/Sankeerth-Billakanti/Add-support-for-next-gen-eDP-driver-on-SnapDragon/20210505-162011
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: arm-imx_v6_v7_defconfig (attached as .config)
compiler: arm-linux-gnueabi-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/a7bc50c70f53224d6cd5d0bd07371ad34d99a75e
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Sankeerth-Billakanti/Add-support-for-next-gen-eDP-driver-on-SnapDragon/20210505-162011
        git checkout a7bc50c70f53224d6cd5d0bd07371ad34d99a75e
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=arm 

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

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/msm/edp/v510/edp_v510_ctrl.c:360:5: warning: no previous prototype for 'edp_clk_enable' [-Wmissing-prototypes]
     360 | int edp_clk_enable(struct edp_ctrl *ctrl,
         |     ^~~~~~~~~~~~~~
   drivers/gpu/drm/msm/edp/v510/edp_v510_ctrl.c: In function 'edp_fill_link_cfg':
>> drivers/gpu/drm/msm/edp/v510/edp_v510_ctrl.c:587:6: warning: variable 'bpp' set but not used [-Wunused-but-set-variable]
     587 |  u32 bpp;
         |      ^~~
>> drivers/gpu/drm/msm/edp/v510/edp_v510_ctrl.c:586:6: warning: variable 'prate' set but not used [-Wunused-but-set-variable]
     586 |  u32 prate;
         |      ^~~~~


vim +/edp_clk_enable +360 drivers/gpu/drm/msm/edp/v510/edp_v510_ctrl.c

   359	
 > 360	int edp_clk_enable(struct edp_ctrl *ctrl,
   361			enum edp_pm_type pm_type, bool enable)
   362	{
   363		int rc = 0;
   364	
   365		if (pm_type != EDP_CORE_PM && pm_type != EDP_CTRL_PM &&
   366				pm_type != EDP_STREAM_PM) {
   367			DRM_ERROR("unsupported power module\n");
   368			return -EINVAL;
   369		}
   370	
   371		if (enable) {
   372			if (pm_type == EDP_CORE_PM && ctrl->core_clks_on) {
   373				DRM_DEBUG_DP("core clks already enabled\n");
   374				return 0;
   375			}
   376	
   377			if (pm_type == EDP_CTRL_PM && ctrl->link_clks_on) {
   378				DRM_DEBUG_DP("links clks already enabled\n");
   379				return 0;
   380			}
   381	
   382			if (pm_type == EDP_STREAM_PM && ctrl->stream_clks_on) {
   383				DRM_DEBUG_DP("pixel clks already enabled\n");
   384				return 0;
   385			}
   386	
   387			if ((pm_type == EDP_CTRL_PM) && (!ctrl->core_clks_on)) {
   388				DRM_DEBUG_DP("Enable core clks before link clks\n");
   389	
   390				rc = edp_clk_set_rate(ctrl, EDP_CORE_PM, enable);
   391				if (rc) {
   392					DRM_ERROR("fail to enable clks: core. err=%d\n",
   393						rc);
   394					return rc;
   395				}
   396				ctrl->core_clks_on = true;
   397			}
   398		}
   399	
   400		rc = edp_clk_set_rate(ctrl, pm_type, enable);
   401		if (rc) {
   402			DRM_ERROR("failed to '%s' clks. err=%d\n",
   403				enable ? "enable" : "disable", rc);
   404				return rc;
   405		}
   406	
   407		if (pm_type == EDP_CORE_PM)
   408			ctrl->core_clks_on = enable;
   409		else if (pm_type == EDP_STREAM_PM)
   410			ctrl->stream_clks_on = enable;
   411		else
   412			ctrl->link_clks_on = enable;
   413	
   414		DRM_DEBUG_DP("stream_clks:%s link_clks:%s core_clks:%s\n",
   415			ctrl->stream_clks_on ? "on" : "off",
   416			ctrl->link_clks_on ? "on" : "off",
   417			ctrl->core_clks_on ? "on" : "off");
   418	
   419		return 0;
   420	}
   421	

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