[PATCH] drm/vkms: Add overlay plane support

[kbuild test robot]

Hi Mamta,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.0-rc8 next-20190301]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Mamta-Shukla/drm-vkms-Add-overlay-plane-support/20190304-034802
config: nds32-allyesconfig (attached as .config)
compiler: nds32le-linux-gcc (GCC) 6.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=6.4.0 make.cross ARCH=nds32 

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/vkms/vkms_plane.c: In function 'vkms_overlay_init':
>> drivers/gpu/drm/vkms/vkms_plane.c:182:10: warning: return makes pointer from integer without a cast [-Wint-conversion]
      return -ENOMEM;
             ^

vim +182 drivers/gpu/drm/vkms/vkms_plane.c

   169	
   170	struct drm_plane *vkms_overlay_init(struct vkms_device *vkmsdev)
   171	{
   172		struct drm_device *dev = &vkmsdev->drm;
   173		const struct drm_plane_helper_funcs *funcs;
   174		struct drm_plane *overlay;
   175		const u32 *formats;
   176		int ret, nformats;
   177		unsigned int blend_caps  = BIT(DRM_MODE_BLEND_PIXEL_NONE) |
   178					BIT(DRM_MODE_BLEND_PREMULTI);
   179	
   180		overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
   181		if (!overlay)
 > 182			return -ENOMEM;
   183	
   184		formats = vkms_overlay_formats;
   185		nformats = ARRAY_SIZE(vkms_overlay_formats);
   186		funcs = &vkms_primary_helper_funcs;
   187		drm_plane_helper_add(overlay, funcs);
   188		drm_plane_create_alpha_property(overlay);
   189		drm_plane_create_blend_mode_property(overlay, blend_caps);
   190	
   191		ret = drm_universal_plane_init(dev, overlay, 0,
   192						&vkms_plane_funcs,
   193						formats, nformats,
   194						NULL,
   195						DRM_PLANE_TYPE_OVERLAY, NULL);
   196		if (ret){
   197			kfree(overlay);
   198			return ERR_PTR(ret);
   199		}
   200	
   201		return overlay;
   202	}
   203	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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