[chrome-os:chromeos-6.6 57/57] drivers/soc/mediatek/mtk-mutex.c:1062:15: warning: variable 'sof_id' set but not used

[chrome-os:chromeos-6.6 57/57] drivers/soc/mediatek/mtk-mutex.c:1062:15: warning: variable 'sof_id' set but not used

[kernel test robot]

tree:   https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-6.6
head:   11792abed5949b15f434d0a53e21e51d5c56e28c
commit: 8039abd30dc699d1936f13fdc3edd18fc9a1952d [57/57] BACKPORT: FROMLIST: soc: mediatek: mutex: add mutex support for MT8196
config: arm-randconfig-001-20250203 (https://download.01.org/0day-ci/archive/20250203/202502031914.YGP7AWsU-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250203/202502031914.YGP7AWsU-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/202502031914.YGP7AWsU-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/soc/mediatek/mtk-mutex.c:1062:15: warning: variable 'sof_id' set but not used [-Wunused-but-set-variable]
    1062 |         unsigned int sof_id;
         |                      ^
   1 warning generated.


vim +/sof_id +1062 drivers/soc/mediatek/mtk-mutex.c

  1055	
  1056	void mtk_mutex_remove_comp(struct mtk_mutex *mutex,
  1057				   enum mtk_ddp_comp_id id)
  1058	{
  1059		struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
  1060							 mutex[mutex->id]);
  1061		unsigned int reg;
> 1062		unsigned int sof_id;
  1063		unsigned int offset;
  1064		bool is_output_comp = true;
  1065	
  1066		WARN_ON(&mtx->mutex[mutex->id] != mutex);
  1067	
  1068		switch (id) {
  1069		case DDP_COMPONENT_DSI0:
  1070			sof_id = MUTEX_SOF_DSI0;
  1071			break;
  1072		case DDP_COMPONENT_DSI1:
  1073			sof_id = MUTEX_SOF_DSI0;
  1074			break;
  1075		case DDP_COMPONENT_DSI2:
  1076			sof_id = MUTEX_SOF_DSI2;
  1077			break;
  1078		case DDP_COMPONENT_DSI3:
  1079			sof_id = MUTEX_SOF_DSI3;
  1080			break;
  1081		case DDP_COMPONENT_DPI0:
  1082			sof_id = MUTEX_SOF_DPI0;
  1083			break;
  1084		case DDP_COMPONENT_DPI1:
  1085			sof_id = MUTEX_SOF_DPI1;
  1086			break;
  1087		case DDP_COMPONENT_DP_INTF0:
  1088			sof_id = MUTEX_SOF_DP_INTF0;
  1089			break;
  1090		case DDP_COMPONENT_DP_INTF1:
  1091			sof_id = MUTEX_SOF_DP_INTF1;
  1092			break;
  1093		case DDP_COMPONENT_DVO0:
  1094			sof_id = MUTEX_SOF_DVO0;
  1095			break;
  1096		default:
  1097			is_output_comp = false;
  1098			break;
  1099		}
  1100	
  1101		if (!is_output_comp || mtx->data->need_sof_mod) {
  1102			if (mtx->data->mutex_mod[id] < 32) {
  1103				offset = DISP_REG_MUTEX_MOD(mtx->data->mutex_mod_reg,
  1104							    mutex->id);
  1105				reg = readl_relaxed(mtx->regs + offset);
  1106				reg &= ~(1 << mtx->data->mutex_mod[id]);
  1107				writel_relaxed(reg, mtx->regs + offset);
  1108			} else {
  1109				offset = DISP_REG_MUTEX_MOD1(mtx->data->mutex_mod_reg,
  1110							     mutex->id);
  1111				reg = readl_relaxed(mtx->regs + offset);
  1112				reg &= ~(1 << (mtx->data->mutex_mod[id] - 32));
  1113				writel_relaxed(reg, mtx->regs + offset);
  1114			}
  1115		}
  1116	
  1117		if (is_output_comp) {
  1118			offset = DISP_REG_MUTEX_SOF(mtx->data->mutex_sof_reg, mutex->id);
  1119			reg = readl_relaxed(mtx->regs + offset);
  1120			reg &= ~(1 << mtx->data->mutex_sof[id]);
  1121			writel_relaxed(reg, mtx->regs + offset);
  1122		}
  1123	}
  1124	EXPORT_SYMBOL_GPL(mtk_mutex_remove_comp);
  1125	

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https://github.com/intel/lkp-tests/wiki