[chrome-os:chromeos-6.6 133/133] drivers/gpu/drm/mediatek/mtk_dp_mst.c:981:28: error: assignment to 'int' from 'struct drm_encoder *' makes integer from pointer without a cast

[kernel test robot <lkp@intel.com>]

tree:   https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-6.6
head:   00e2b7e08c550ff321daba7b9956795d281bdd98
commit: d12007dbbfb528e0618c79a77643e64dff14d0cc [133/133] CHROMIUM: drm/mediatek: Refine the MST ACT flow
config: arm-allmodconfig (https://download.01.org/0day-ci/archive/20250527/202505270921.1m0fcuEe-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250527/202505270921.1m0fcuEe-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/202505270921.1m0fcuEe-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/gpu/drm/mediatek/mtk_dp_mst.c: In function 'mtk_dp_mst_drv_set_hdcp_setting':
>> drivers/gpu/drm/mediatek/mtk_dp_mst.c:981:28: error: assignment to 'int' from 'struct drm_encoder *' makes integer from pointer without a cast [-Wint-conversion]
     981 |                 encoder_id = mtk_dp->mtk_con[i]->encoder;
         |                            ^


vim +981 drivers/gpu/drm/mediatek/mtk_dp_mst.c

   960	
   961	void mtk_dp_mst_drv_set_hdcp_setting(struct mtk_dp *mtk_dp)
   962	{
   963		u8 i;
   964		int encoder_id;
   965		u16 start_slot, end_slot;
   966		struct drm_dp_mst_atomic_payload *payload;
   967		struct drm_dp_mst_topology_state *mst_state;
   968	
   969		mtk_dp_mst_hal_hdcp_enable(mtk_dp, true);
   970	
   971		mst_state = to_drm_dp_mst_topology_state(mtk_dp->mgr.base.state);
   972		if (IS_ERR_OR_NULL(mst_state)) {
   973			dev_err(mtk_dp->dev, "[DPTX] fail to get mst topology state!\n");
   974			return;
   975		}
   976	
   977		for (i = 0; i < ARRAY_SIZE(mtk_dp->mtk_con); i++) {
   978			if (!mst_con_with_encoder(mtk_dp->mtk_con[i]))
   979				continue;
   980	
 > 981			encoder_id = mtk_dp->mtk_con[i]->encoder;
   982			if ((mst_state->payload_mask >> encoder_id) & 0x1) {
   983				payload = drm_atomic_get_mst_payload_state(mst_state,
   984									   mtk_dp->mtk_con[i]->port);
   985				if (IS_ERR_OR_NULL(payload)) {
   986					dev_err(mtk_dp->dev, "[DPTX] fail to get mst payload state!\n");
   987					continue;
   988				}
   989	
   990				start_slot = payload->vc_start_slot;
   991				end_slot = start_slot + payload->time_slots;
   992	
   993				/* reg_vc_payload_timeslot */
   994				if ((start_slot > 64) || (end_slot > 64))
   995					dev_err(mtk_dp->dev,
   996						"[DPTX] Invalid slot region, start_slot %d, end_slot %d\n",
   997						start_slot, end_slot);
   998				else
   999					mtk_dp_mst_hal_hdcp_set_timeslot(mtk_dp, start_slot, end_slot);
  1000			}
  1001		}
  1002	
  1003		mtk_dp_mst_hal_hdcp_trigger_act(mtk_dp);
  1004	}
  1005	

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