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When multiple bridges are present, EDID detection capability (DRM_BRIDGE_OP_EDID) takes precedence over modes detection (DRM_BRIDGE_OP_MODES). To ensure the above two capabilities are determined by the last bridge in the chain, we handle three cases: Case 1: The later bridge declares only DRM_BRIDGE_OP_MODES - If the previous bridge declares DRM_BRIDGE_OP_EDID, set &drm_bridge_connector.bridge_edid to NULL and set &drm_bridge_connector.bridge_modes to the later bridge. - Ensure modes detection capability of the later bridge will not be ignored. Case 2: The later bridge declares only DRM_BRIDGE_OP_EDID - If the previous bridge declares DRM_BRIDGE_OP_MODES, set &drm_bridge_connector.bridge_modes to NULL and set &drm_bridge_connector.bridge_edid to the later bridge. - Although EDID detection capability has higher priority, this operation is for balance and makes sense. Case 3: the later bridge declares both of them - Assign later bridge as &drm_bridge_connector.bridge_edid and and &drm_bridge_connector.bridge_modes to this bridge. - Just leave transfer of these two capabilities as before. Signed-off-by: Damon Ding <damon.ding@rock-chips.com> Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Tested-by: Heiko Stuebner <heiko@sntech.de> (on rk3588) Link: https://patch.msgid.link/20251217093321.3108939-2-damon.ding@rock-chips.com Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>