drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c:687:6: warning: variable 'ret' set but not used

From: kernel test robot
Date: Wed Jun 17 2020 - 08:38:48 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 69119673bd50b176ded34032fadd41530fb5af21
commit: 1b61de45dfaff00b627e47349a019658e39268b9 drm/amdgpu: add initial VCN2.0 support (v2)
date: 12 months ago
config: ia64-randconfig-r012-20200617 (attached as .config)
compiler: ia64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout 1b61de45dfaff00b627e47349a019658e39268b9
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c: In function 'vcn_v2_0_disable_static_power_gating':
>> drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c:687:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
687 | int ret;
| ^~~
drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c: In function 'vcn_v2_0_enable_static_power_gating':
drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c:736:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
736 | int ret;
| ^~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/dc_types.h:29,
from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services_types.h:30,
from drivers/gpu/drm/amd/amdgpu/../include/dm_pp_interface.h:26,
from drivers/gpu/drm/amd/amdgpu/amdgpu.h:53,
from drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c:26:
At top level:
drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:76:32: warning: 'dc_fixpt_ln2_div_2' defined but not used [-Wunused-const-variable=]
76 | static const struct fixed31_32 dc_fixpt_ln2_div_2 = { 1488522236LL };
| ^~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:75:32: warning: 'dc_fixpt_ln2' defined but not used [-Wunused-const-variable=]
75 | static const struct fixed31_32 dc_fixpt_ln2 = { 2977044471LL };
| ^~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:74:32: warning: 'dc_fixpt_e' defined but not used [-Wunused-const-variable=]
74 | static const struct fixed31_32 dc_fixpt_e = { 11674931555LL };
| ^~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:73:32: warning: 'dc_fixpt_two_pi' defined but not used [-Wunused-const-variable=]
73 | static const struct fixed31_32 dc_fixpt_two_pi = { 26986075409LL };
| ^~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:72:32: warning: 'dc_fixpt_pi' defined but not used [-Wunused-const-variable=]
72 | static const struct fixed31_32 dc_fixpt_pi = { 13493037705LL };
| ^~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:67:32: warning: 'dc_fixpt_zero' defined but not used [-Wunused-const-variable=]
67 | static const struct fixed31_32 dc_fixpt_zero = { 0 };
| ^~~~~~~~~~~~~

vim +/ret +687 drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c

683
684 static void vcn_v2_0_disable_static_power_gating(struct amdgpu_device *adev)
685 {
686 uint32_t data = 0;
> 687 int ret;
688
689 if (adev->pg_flags & AMD_PG_SUPPORT_VCN) {
690 data = (1 << UVD_PGFSM_CONFIG__UVDM_PWR_CONFIG__SHIFT
691 | 1 << UVD_PGFSM_CONFIG__UVDU_PWR_CONFIG__SHIFT
692 | 2 << UVD_PGFSM_CONFIG__UVDF_PWR_CONFIG__SHIFT
693 | 2 << UVD_PGFSM_CONFIG__UVDC_PWR_CONFIG__SHIFT
694 | 2 << UVD_PGFSM_CONFIG__UVDB_PWR_CONFIG__SHIFT
695 | 2 << UVD_PGFSM_CONFIG__UVDIL_PWR_CONFIG__SHIFT
696 | 2 << UVD_PGFSM_CONFIG__UVDIR_PWR_CONFIG__SHIFT
697 | 2 << UVD_PGFSM_CONFIG__UVDTD_PWR_CONFIG__SHIFT
698 | 2 << UVD_PGFSM_CONFIG__UVDTE_PWR_CONFIG__SHIFT
699 | 2 << UVD_PGFSM_CONFIG__UVDE_PWR_CONFIG__SHIFT
700 | 2 << UVD_PGFSM_CONFIG__UVDW_PWR_CONFIG__SHIFT);
701
702 WREG32_SOC15(VCN, 0, mmUVD_PGFSM_CONFIG, data);
703 SOC15_WAIT_ON_RREG(VCN, 0, mmUVD_PGFSM_STATUS,
704 UVD_PGFSM_STATUS__UVDM_UVDU_PWR_ON, 0xFFFFFF, ret);
705 } else {
706 data = (1 << UVD_PGFSM_CONFIG__UVDM_PWR_CONFIG__SHIFT
707 | 1 << UVD_PGFSM_CONFIG__UVDU_PWR_CONFIG__SHIFT
708 | 1 << UVD_PGFSM_CONFIG__UVDF_PWR_CONFIG__SHIFT
709 | 1 << UVD_PGFSM_CONFIG__UVDC_PWR_CONFIG__SHIFT
710 | 1 << UVD_PGFSM_CONFIG__UVDB_PWR_CONFIG__SHIFT
711 | 1 << UVD_PGFSM_CONFIG__UVDIL_PWR_CONFIG__SHIFT
712 | 1 << UVD_PGFSM_CONFIG__UVDIR_PWR_CONFIG__SHIFT
713 | 1 << UVD_PGFSM_CONFIG__UVDTD_PWR_CONFIG__SHIFT
714 | 1 << UVD_PGFSM_CONFIG__UVDTE_PWR_CONFIG__SHIFT
715 | 1 << UVD_PGFSM_CONFIG__UVDE_PWR_CONFIG__SHIFT
716 | 1 << UVD_PGFSM_CONFIG__UVDW_PWR_CONFIG__SHIFT);
717 WREG32_SOC15(VCN, 0, mmUVD_PGFSM_CONFIG, data);
718 SOC15_WAIT_ON_RREG(VCN, 0, mmUVD_PGFSM_STATUS, 0, 0xFFFFFFFF, ret);
719 }
720
721 /* polling UVD_PGFSM_STATUS to confirm UVDM_PWR_STATUS,
722 * UVDU_PWR_STATUS are 0 (power on) */
723
724 data = RREG32_SOC15(VCN, 0, mmUVD_POWER_STATUS);
725 data &= ~0x103;
726 if (adev->pg_flags & AMD_PG_SUPPORT_VCN)
727 data |= UVD_PGFSM_CONFIG__UVDM_UVDU_PWR_ON |
728 UVD_POWER_STATUS__UVD_PG_EN_MASK;
729
730 WREG32_SOC15(VCN, 0, mmUVD_POWER_STATUS, data);
731 }
732

---
0-DAY CI Kernel Test Service, Intel Corporation
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Attachment: .config.gz
Description: application/gzip