[PATCH] drm/vc4: Add support for plane alpha

[kbuild test robot]

Hi Stefan,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v4.17-rc1]
[also build test ERROR on next-20180420]
[cannot apply to anholt/for-next]
[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/Stefan-Schake/drm-vc4-Add-support-for-plane-alpha/20180423-002110
config: sh-allmodconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
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
        make.cross ARCH=sh 

All errors (new ones prefixed by >>):

   drivers/gpu/drm/vc4/vc4_plane.c: In function 'vc4_plane_reset':
>> drivers/gpu/drm/vc4/vc4_plane.c:204:14: error: 'struct drm_plane_state' has no member named 'alpha'
     plane->state->alpha = DRM_BLEND_ALPHA_OPAQUE;
                 ^~
>> drivers/gpu/drm/vc4/vc4_plane.c:204:24: error: 'DRM_BLEND_ALPHA_OPAQUE' undeclared (first use in this function)
     plane->state->alpha = DRM_BLEND_ALPHA_OPAQUE;
                           ^~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/vc4/vc4_plane.c:204:24: note: each undeclared identifier is reported only once for each function it appears in
   In file included from drivers/gpu/drm/vc4/vc4_plane.c:28:0:
   drivers/gpu/drm/vc4/vc4_plane.c: In function 'vc4_plane_mode_set':
   drivers/gpu/drm/vc4/vc4_plane.c:557:23: error: 'struct drm_plane_state' has no member named 'alpha'
       VC4_SET_FIELD(state->alpha >> 8, SCALER_POS0_FIXED_ALPHA) |
                          ^
   drivers/gpu/drm/vc4/vc4_regs.h:18:24: note: in definition of macro 'VC4_SET_FIELD'
      uint32_t fieldval = (value) << field##_SHIFT;  \
                           ^~~~~
   drivers/gpu/drm/vc4/vc4_plane.c:574:25: error: 'struct drm_plane_state' has no member named 'alpha'
     mix_plane_alpha = state->alpha != DRM_BLEND_ALPHA_OPAQUE &&
                            ^~
   drivers/gpu/drm/vc4/vc4_plane.c:574:36: error: 'DRM_BLEND_ALPHA_OPAQUE' undeclared (first use in this function)
     mix_plane_alpha = state->alpha != DRM_BLEND_ALPHA_OPAQUE &&
                                       ^~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/vc4/vc4_plane.c: In function 'vc4_plane_init':
>> drivers/gpu/drm/vc4/vc4_plane.c:952:2: error: implicit declaration of function 'drm_plane_create_alpha_property'; did you mean 'drm_plane_create_zpos_property'? [-Werror=implicit-function-declaration]
     drm_plane_create_alpha_property(plane);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     drm_plane_create_zpos_property
   cc1: some warnings being treated as errors

vim +204 drivers/gpu/drm/vc4/vc4_plane.c

   191	
   192	/* Called during init to allocate the plane's atomic state. */
   193	static void vc4_plane_reset(struct drm_plane *plane)
   194	{
   195		struct vc4_plane_state *vc4_state;
   196	
   197		WARN_ON(plane->state);
   198	
   199		vc4_state = kzalloc(sizeof(*vc4_state), GFP_KERNEL);
   200		if (!vc4_state)
   201			return;
   202	
   203		plane->state = &vc4_state->base;
 > 204		plane->state->alpha = DRM_BLEND_ALPHA_OPAQUE;
   205		vc4_state->base.plane = plane;
   206	}
   207	

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