[Intel-gfx] [PATCH] drm/i915: Replace some more busy waits with normal ones

[kbuild test robot]

Hi Tvrtko,

[auto build test ERROR on drm-intel/for-linux-next]
[also build test ERROR on v4.5 next-20160323]
[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/Tvrtko-Ursulin/drm-i915-Replace-some-more-busy-waits-with-normal-ones/20160323-224126
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: i386-randconfig-x000-201612 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   drivers/gpu/drm/i915/intel_display.c: In function 'lpt_reset_fdi_mphy':
>> drivers/gpu/drm/i915/intel_display.c:8386:6: error: implicit declaration of function 'wait_for_us' [-Werror=implicit-function-declaration]
     if (wait_for_us(I915_READ(SOUTH_CHICKEN2) &
         ^
   cc1: some warnings being treated as errors

vim +/wait_for_us +8386 drivers/gpu/drm/i915/intel_display.c

  8380		uint32_t tmp;
  8381	
  8382		tmp = I915_READ(SOUTH_CHICKEN2);
  8383		tmp |= FDI_MPHY_IOSFSB_RESET_CTL;
  8384		I915_WRITE(SOUTH_CHICKEN2, tmp);
  8385	
> 8386		if (wait_for_us(I915_READ(SOUTH_CHICKEN2) &
  8387				FDI_MPHY_IOSFSB_RESET_STATUS, 100))
  8388			DRM_ERROR("FDI mPHY reset assert timeout\n");
  8389	

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