drm/amd/display: Add analog bit to edid_caps (v2)

The new analog bit will be used with DVI-I connectors.

DVI-I connectors can connect to both digital and analog monitors
and this bit will help distinguish between those.

v2:
Sanitize analog bit based on connector type.

Signed-off-by: Timur Kristóf <[e-mail]>
Reviewed-by: Harry Wentland <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c

···
 	edid_caps->serial_number = edid_buf->serial;
 	edid_caps->manufacture_week = edid_buf->mfg_week;
 	edid_caps->manufacture_year = edid_buf->mfg_year;
+	edid_caps->analog = !(edid_buf->input & DRM_EDID_INPUT_DIGITAL);
 
 	drm_edid_get_monitor_name(edid_buf,
 				  edid_caps->display_name,

drivers/gpu/drm/amd/display/dc/dc_types.h

···
 	unsigned int wait_after_dpcd_poweroff_ms;
 };
 
+/**
+ * struct dc_edid_caps - Capabilities read from EDID.
+ * @analog: Whether the monitor is analog. Used by DVI-I handling.
+ */
 struct dc_edid_caps {
 	/* sink identification */
 	uint16_t manufacturer_id;
···
 	bool hdr_supported;
 	bool rr_capable;
 	bool scdc_present;
+	bool analog;
 
 	struct dc_panel_patch panel_patch;
 };

drivers/gpu/drm/amd/display/dc/link/link_detection.c

···
 			break;
 		}
 
+		sink->edid_caps.analog &= dc_connector_supports_analog(link->link_id.id);
+
 		// Check if edid is the same
 		if ((prev_sink) &&
 		    (edid_status == EDID_THE_SAME || edid_status == EDID_OK))

drivers/gpu/drm/amd/display/include/grph_object_id.h

···
 	}
 	return false;
 }
+
+static inline bool dc_connector_supports_analog(const enum connector_id conn)
+{
+	return conn == CONNECTOR_ID_VGA ||
+		conn == CONNECTOR_ID_SINGLE_LINK_DVII ||
+		conn == CONNECTOR_ID_DUAL_LINK_DVII;
+}
 #endif