[PATCH v3 16/17] drm/mediatek: Add support for multiple mmsys in the one mediatek-drm driver

[kernel test robot]

Hi paul-pl.chen,

kernel test robot noticed the following build warnings:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linus/master v6.15-rc6 next-20250515]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/paul-pl-chen/dt-bindings-soc-mediatek-add-mutex-yaml-for-MT8196/20250515-173733
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20250515093454.1729720-17-paul-pl.chen%40mediatek.com
patch subject: [PATCH v3 16/17] drm/mediatek: Add support for multiple mmsys in the one mediatek-drm driver
config: arm64-randconfig-001-20250516 (https://download.01.org/0day-ci/archive/20250516/202505161512.PmRwb8Li-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 9.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250516/202505161512.PmRwb8Li-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505161512.PmRwb8Li-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/mediatek/mtk_ddp_comp.c: In function 'mtk_find_possible_crtcs':
>> drivers/gpu/drm/mediatek/mtk_ddp_comp.c:670:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     670 |   if (found)
         |   ^~
   drivers/gpu/drm/mediatek/mtk_ddp_comp.c:673:4: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
     673 |    count++;
         |    ^~~~~


vim +/if +670 drivers/gpu/drm/mediatek/mtk_ddp_comp.c

   622	
   623	int mtk_find_possible_crtcs(struct drm_device *drm, struct device *dev)
   624	{
   625		struct mtk_drm_private *private = drm->dev_private;
   626		const struct mtk_mmsys_driver_data *data;
   627		struct mtk_drm_private *priv_n;
   628		int i, j, count = 0, ret;
   629	
   630		/* search each path in private data */
   631		for (i = 0; i < MAX_CRTC; i++) {
   632			bool found = false;
   633			int avail_mmsys_num = 0;
   634	
   635			for (j = 0; j < private->data->mmsys_dev_num; j++) {
   636				const unsigned int *path = NULL;
   637				unsigned int path_len = 0;
   638	
   639				priv_n = private->all_drm_private[j];
   640				data = priv_n->data;
   641	
   642				if (i == CRTC_MAIN) {
   643					path = data->main_path;
   644					path_len = data->main_len;
   645				} else if (i == CRTC_EXT) {
   646					path = data->ext_path;
   647					path_len = data->ext_len;
   648				} else if (i == CRTC_THIRD) {
   649					path = data->third_path;
   650					path_len = data->third_len;
   651				}
   652	
   653				/* skip if no path data in current mmsys */
   654				if (path_len == 0 || !path) {
   655					avail_mmsys_num++;
   656					continue;
   657				}
   658	
   659				if (mtk_ddp_path_available(path, path_len, priv_n->comp_node))
   660					avail_mmsys_num++;
   661	
   662				if (mtk_ddp_comp_find(dev, path, path_len, priv_n->ddp_comp))
   663					found = true;
   664		}
   665	
   666			/* skip invalid path */
   667			if (avail_mmsys_num != private->data->mmsys_dev_num)
   668				continue;
   669	
 > 670			if (found)
   671				return BIT(count);
   672	
   673				count++;
   674		}
   675	
   676		ret = mtk_ddp_comp_find_in_route(dev,
   677						 private->data->conn_routes,
   678						 private->data->num_conn_routes,
   679						 private->ddp_comp);
   680	
   681		if (ret < 0)
   682			DRM_INFO("Failed to find comp in ddp table, ret = %d\n", ret);
   683	
   684		return ret;
   685	}
   686	

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