Hi Uma,

[auto build test ERROR on drm-intel/for-linux-next]
[also build test ERROR on v4.5-rc2 next-20160201]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Ramalingam-C/drm-i915-BXT-Fixed-COS-blanking-issue/20160203-020606
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: x86_64-randconfig-x019-201605 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All error/warnings (new ones prefixed by >>):

   drivers/gpu/drm/i915/intel_display.c: In function 'intel_get_dsi_pipe_timings':
>> drivers/gpu/drm/i915/intel_display.c:7858:4: error: implicit declaration of function 'enc_to_intel_dsi' [-Werror=implicit-function-declaration]
       enc_to_intel_dsi(&encoder->base);
       ^
>> drivers/gpu/drm/i915/intel_display.c:7858:4: warning: initialization makes pointer from integer without a cast [-Wint-conversion]
>> drivers/gpu/drm/i915/intel_display.c:7861:36: error: dereferencing pointer to incomplete type 'struct intel_dsi'
      pipe_config->pipe_bpp = intel_dsi->dsi_bpp;
                                       ^
>> drivers/gpu/drm/i915/intel_display.c:7862:3: error: implicit declaration of function 'for_each_dsi_port' [-Werror=implicit-function-declaration]
      for_each_dsi_port(port, intel_dsi->ports) {
      ^
>> drivers/gpu/drm/i915/intel_display.c:7862:45: error: expected ';' before '{' token
      for_each_dsi_port(port, intel_dsi->ports) {
                                                ^
   drivers/gpu/drm/i915/intel_display.c: In function 'haswell_get_pipe_config':
>> drivers/gpu/drm/i915/intel_display.c:10079:9: error: 'BXT_PIPE_SELECT_A' undeclared (first use in this function)
       case BXT_PIPE_SELECT_A:
            ^
   drivers/gpu/drm/i915/intel_display.c:10079:9: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/gpu/drm/i915/intel_display.c:10082:9: error: 'BXT_PIPE_SELECT_B' undeclared (first use in this function)
       case BXT_PIPE_SELECT_B:
            ^
>> drivers/gpu/drm/i915/intel_display.c:10085:9: error: 'BXT_PIPE_SELECT_C' undeclared (first use in this function)
       case BXT_PIPE_SELECT_C:
            ^
   cc1: some warnings being treated as errors

vim +/enc_to_intel_dsi +7858 drivers/gpu/drm/i915/intel_display.c

  7852			pipe_config->base.adjusted_mode.crtc_vblank_end += 1;
  7853		}
  7854	
  7855	
  7856		for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
  7857			struct intel_dsi *intel_dsi =
> 7858				enc_to_intel_dsi(&encoder->base);
  7859			enum port port;
  7860	
> 7861			pipe_config->pipe_bpp = intel_dsi->dsi_bpp;
> 7862			for_each_dsi_port(port, intel_dsi->ports) {
  7863				pipe_config->base.adjusted_mode.crtc_hdisplay =
  7864					I915_READ(BXT_MIPI_TRANS_HACTIVE(port));
  7865				pipe_config->base.adjusted_mode.crtc_vdisplay =

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