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Mon, 05 Sep 2022 18:04:42 +0000 Date: Tue, 6 Sep 2022 02:03:57 +0800 From: kernel test robot To: Fangzhi Zuo Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Alex Deucher , Nicholas Kazlauskas Subject: drivers/gpu/drm/amd/amdgpu/../display/dc/dcn31/dcn31_apg.c:117:18: warning: variable 'channels' set but not used Message-ID: <202209060159.tIsVfTJM-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Fangzhi, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 7e18e42e4b280c85b76967a9106a13ca61c16179 commit: 61452908a79ec936660494fb4b9f2a35ee42e6e0 drm/amd/display: Add DP 2.0 Audio Package Generator date: 1 year ago config: i386-buildonly-randconfig-r004-20220905 (https://download.01.org/0day-ci/archive/20220906/202209060159.tIsVfTJM-lkp@intel.com/config) compiler: gcc-11 (Debian 11.3.0-5) 11.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=61452908a79ec936660494fb4b9f2a35ee42e6e0 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 61452908a79ec936660494fb4b9f2a35ee42e6e0 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All warnings (new ones prefixed by >>): drivers/gpu/drm/amd/amdgpu/../display/dc/dcn31/dcn31_apg.c: In function 'apg31_se_audio_setup': >> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn31/dcn31_apg.c:117:18: warning: variable 'channels' set but not used [-Wunused-but-set-variable] 117 | uint32_t channels = 0; | ^~~~~~~~ >> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn31/dcn31_apg.c:116:18: warning: variable 'speakers' set but not used [-Wunused-but-set-variable] 116 | uint32_t speakers = 0; | ^~~~~~~~ vim +/channels +117 drivers/gpu/drm/amd/amdgpu/../display/dc/dcn31/dcn31_apg.c 108 109 static void apg31_se_audio_setup( 110 struct apg *apg, 111 unsigned int az_inst, 112 struct audio_info *audio_info) 113 { 114 struct dcn31_apg *apg31 = DCN31_APG_FROM_APG(apg); 115 > 116 uint32_t speakers = 0; > 117 uint32_t channels = 0; 118 119 ASSERT(audio_info); 120 /* This should not happen.it does so we don't get BSOD*/ 121 if (audio_info == NULL) 122 return; 123 124 speakers = audio_info->flags.info.ALLSPEAKERS; 125 channels = speakers_to_channels(audio_info->flags.speaker_flags).all; 126 127 /* DisplayPort only allows for one audio stream with stream ID 0 */ 128 REG_UPDATE(APG_CONTROL2, APG_DP_AUDIO_STREAM_ID, 0); 129 130 /* When running in "pair mode", pairs of audio channels have their own enable 131 * this is for really old audio drivers */ 132 REG_UPDATE(APG_DBG_GEN_CONTROL, APG_DBG_AUDIO_CHANNEL_ENABLE, 0xF); 133 // REG_UPDATE(APG_DBG_GEN_CONTROL, APG_DBG_AUDIO_CHANNEL_ENABLE, channels); 134 135 /* Disable forced mem power off */ 136 REG_UPDATE(APG_MEM_PWR, APG_MEM_PWR_FORCE, 0); 137 138 apg31_enable(apg); 139 } 140 -- 0-DAY CI Kernel Test Service https://01.org/lkp