[Intel-gfx] [PATCH 3/4] drm/i915: Use wm0 only during async flips for DG2

[kernel test robot]

Hi Stanislav,

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 v5.16-rc4 next-20211207]
[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/Stanislav-Lisovskiy/drm-i915-Pass-plane-to-watermark-calculation-functions/20211207-190910
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: i386-randconfig-r035-20211207 (https://download.01.org/0day-ci/archive/20211208/202112080159.xgdgtsnI-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/8c7a53ddec5435d127040d03a1eb073ec71608dc
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Stanislav-Lisovskiy/drm-i915-Pass-plane-to-watermark-calculation-functions/20211207-190910
        git checkout 8c7a53ddec5435d127040d03a1eb073ec71608dc
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/i915/

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/i915/intel_pm.c:5500:6: warning: no previous prototype for 'dg2_async_flip_optimization' [-Wmissing-prototypes]
    5500 | bool dg2_async_flip_optimization(struct drm_i915_private *i915,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/dg2_async_flip_optimization +5500 drivers/gpu/drm/i915/intel_pm.c

  5499	
> 5500	bool dg2_async_flip_optimization(struct drm_i915_private *i915,
  5501					 const struct intel_crtc_state *crtc_state,
  5502					 const struct intel_plane *plane)
  5503	{
  5504		return DISPLAY_VER(i915) >= 13 &&
  5505		       crtc_state->uapi.async_flip &&
  5506		       plane->async_flip;
  5507	}
  5508	

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