[PATCH v8 01/17] drm/dp_mst: Add PBN calculation for DSC modes

[kbuild test robot]

Hi,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on next-20191203]
[cannot apply to drm-intel/for-linux-next linus/master v5.4-rc8 drm-exynos/exynos-drm-next v5.4]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/mikita-lipski-amd-com/DSC-MST-support-for-DRM-and-AMDGPU/20191204-020604
base:    1ab75b2e415a29dba9aec94f203c6f88dbfc0ba0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-91-g817270f-dirty
        make ARCH=x86_64 allmodconfig
        make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp at intel.com>


sparse warnings: (new ones prefixed by >>)

>> drivers/gpu/drm/selftests/test-drm_dp_mst_helper.c:28:43: sparse: sparse: not enough arguments for function drm_dp_calc_pbn_mode

vim +28 drivers/gpu/drm/selftests/test-drm_dp_mst_helper.c

7cbce45d624322 Lyude Paul 2019-09-03  13  
7cbce45d624322 Lyude Paul 2019-09-03  14  int igt_dp_mst_calc_pbn_mode(void *ignored)
7cbce45d624322 Lyude Paul 2019-09-03  15  {
7cbce45d624322 Lyude Paul 2019-09-03  16  	int pbn, i;
7cbce45d624322 Lyude Paul 2019-09-03  17  	const struct {
7cbce45d624322 Lyude Paul 2019-09-03  18  		int rate;
7cbce45d624322 Lyude Paul 2019-09-03  19  		int bpp;
7cbce45d624322 Lyude Paul 2019-09-03  20  		int expected;
7cbce45d624322 Lyude Paul 2019-09-03  21  	} test_params[] = {
7cbce45d624322 Lyude Paul 2019-09-03  22  		{ 154000, 30, 689 },
7cbce45d624322 Lyude Paul 2019-09-03  23  		{ 234000, 30, 1047 },
7cbce45d624322 Lyude Paul 2019-09-03  24  		{ 297000, 24, 1063 },
7cbce45d624322 Lyude Paul 2019-09-03  25  	};
7cbce45d624322 Lyude Paul 2019-09-03  26  
7cbce45d624322 Lyude Paul 2019-09-03  27  	for (i = 0; i < ARRAY_SIZE(test_params); i++) {
7cbce45d624322 Lyude Paul 2019-09-03 @28  		pbn = drm_dp_calc_pbn_mode(test_params[i].rate,
7cbce45d624322 Lyude Paul 2019-09-03  29  					   test_params[i].bpp);
7cbce45d624322 Lyude Paul 2019-09-03  30  		FAIL(pbn != test_params[i].expected,
7cbce45d624322 Lyude Paul 2019-09-03  31  		     "Expected PBN %d for clock %d bpp %d, got %d\n",
7cbce45d624322 Lyude Paul 2019-09-03  32  		     test_params[i].expected, test_params[i].rate,
7cbce45d624322 Lyude Paul 2019-09-03  33  		     test_params[i].bpp, pbn);
7cbce45d624322 Lyude Paul 2019-09-03  34  	}
7cbce45d624322 Lyude Paul 2019-09-03  35  
7cbce45d624322 Lyude Paul 2019-09-03  36  	return 0;
7cbce45d624322 Lyude Paul 2019-09-03  37  }
2f015ec6eab693 Lyude Paul 2019-09-03  38  

:::::: The code at line 28 was first introduced by commit
:::::: 7cbce45d6243225914b5c967b4ee927a2327842a drm/dp_mst: Move test_calc_pbn_mode() into an actual selftest

:::::: TO: Lyude Paul <lyude at redhat.com>
:::::: CC: Lyude Paul <lyude at redhat.com>

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0-DAY kernel test infrastructure                 Open Source Technology Center
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