[agd5f:drm-next 470/518] drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:3510: undefined reference to `dc_dsc_stream_bandwidth_in_kbps'

Thursday, 18 March 2021

tree:   https://gitlab.freedesktop.org/agd5f/linux.git drm-next
head:   c37eed39d0ba85a057baa9fafbf9f7cc1f888c1e
commit: a03f6c0e26b2882fe3eeb092111bdccc113d76ce [470/518] drm/amd/display: Add changes
for dsc bpp in 16ths and unify bw calculations
config: x86_64-randconfig-r015-20210318 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        git remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git
        git fetch --no-tags agd5f drm-next
        git checkout a03f6c0e26b2882fe3eeb092111bdccc113d76ce
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com&gt;

All errors (new ones prefixed by >>):

   ld: drivers/gpu/drm/amd/display/dc/core/dc_link.o: in function
`dc_bandwidth_in_kbps_from_timing':
...
> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:3510:
undefined reference to `dc_dsc_stream_bandwidth_in_kbps' 

vim +3510 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c

  3502	
  3503	uint32_t dc_bandwidth_in_kbps_from_timing(
  3504		const struct dc_crtc_timing *timing)
  3505	{
  3506		uint32_t bits_per_channel = 0;
  3507		uint32_t kbps;
  3508	
  3509		if (timing->flags.DSC) {
...
 3510			return
dc_dsc_stream_bandwidth_in_kbps(timing->pix_clk_100hz,
timing->dsc_cfg.bits_per_pixel);   3511		}
  3512	
  3513		switch (timing->display_color_depth) {
  3514		case COLOR_DEPTH_666:
  3515			bits_per_channel = 6;
  3516			break;
  3517		case COLOR_DEPTH_888:
  3518			bits_per_channel = 8;
  3519			break;
  3520		case COLOR_DEPTH_101010:
  3521			bits_per_channel = 10;
  3522			break;
  3523		case COLOR_DEPTH_121212:
  3524			bits_per_channel = 12;
  3525			break;
  3526		case COLOR_DEPTH_141414:
  3527			bits_per_channel = 14;
  3528			break;
  3529		case COLOR_DEPTH_161616:
  3530			bits_per_channel = 16;
  3531			break;
  3532		default:
  3533			ASSERT(bits_per_channel != 0);
  3534			bits_per_channel = 8;
  3535			break;
  3536		}
  3537	
  3538		kbps = timing->pix_clk_100hz / 10;
  3539		kbps *= bits_per_channel;
  3540	
  3541		if (timing->flags.Y_ONLY != 1) {
  3542			/*Only YOnly make reduce bandwidth by 1/3 compares to RGB*/
  3543			kbps *= 3;
  3544			if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420)
  3545				kbps /= 2;
  3546			else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422)
  3547				kbps = kbps * 2 / 3;
  3548		}
  3549	
  3550		return kbps;
  3551	

---
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https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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