[sashal-stable:pending-6.5 74/166] drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:55:17: warning: 'apply_128b_132b_stream_overhead' defined but not used

[sashal-stable:pending-6.5 74/166] drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:55:17: warning: 'apply_128b_132b_stream_overhead' defined but not used

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git pending-6.5
head:   fd1a1970676435366dd0f58cb455292d92d7ecce
commit: 26681b7d8fc3e5ea6e65a2999e1589f59a2dad1d [74/166] drm/amd/display: Add stream overhead in BW calculations for 128b/132b
config: sparc-allyesconfig (https://download.01.org/0day-ci/archive/20230920/202309201033.obS01oWG-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230920/202309201033.obS01oWG-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309201033.obS01oWG-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:55:17: warning: 'apply_128b_132b_stream_overhead' defined but not used [-Wunused-function]
      55 | static uint32_t apply_128b_132b_stream_overhead(
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/apply_128b_132b_stream_overhead +55 drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c

    51	
    52	/* Need to account for padding due to pixel-to-symbol packing
    53	 * for uncompressed 128b/132b streams.
    54	 */
  > 55	static uint32_t apply_128b_132b_stream_overhead(
    56		const struct dc_crtc_timing *timing, const uint32_t kbps)
    57	{
    58		uint32_t total_kbps = kbps;
    59	
    60		if (disable_128b_132b_stream_overhead)
    61			return kbps;
    62	
    63		if (!timing->flags.DSC) {
    64			struct fixed31_32 bpp;
    65			struct fixed31_32 overhead_factor;
    66	
    67			bpp = dc_fixpt_from_int(kbps);
    68			bpp = dc_fixpt_div_int(bpp, timing->pix_clk_100hz / 10);
    69	
    70			/* Symbols_per_HActive = HActive * bpp / (4 lanes * 32-bit symbol size)
    71			 * Overhead_factor = ceil(Symbols_per_HActive) / Symbols_per_HActive
    72			 */
    73			overhead_factor = dc_fixpt_from_int(timing->h_addressable);
    74			overhead_factor = dc_fixpt_mul(overhead_factor, bpp);
    75			overhead_factor = dc_fixpt_div_int(overhead_factor, 128);
    76			overhead_factor = dc_fixpt_div(
    77				dc_fixpt_from_int(dc_fixpt_ceil(overhead_factor)),
    78				overhead_factor);
    79	
    80			total_kbps = dc_fixpt_ceil(
    81				dc_fixpt_mul_int(overhead_factor, total_kbps));
    82		}
    83	
    84		return total_kbps;
    85	}
    86	

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