drm/radeon/kms: add quirk for Mac Radeon HD 2600 card

Reported-by: 屋国遥 <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>
Cc: [e-mail]
Signed-off-by: Dave Airlie <[e-mail]>

drivers/gpu/drm/radeon/radeon_atombios.c

···
 			*line_mux = 0x90;
 	}
 
+	/* mac rv630 */
+	if ((dev->pdev->device == 0x9588) &&
+	    (dev->pdev->subsystem_vendor == 0x106b) &&
+	    (dev->pdev->subsystem_device == 0x00a6)) {
+		if ((supported_device == ATOM_DEVICE_TV1_SUPPORT) &&
+		    (*connector_type == DRM_MODE_CONNECTOR_DVII)) {
+			*connector_type = DRM_MODE_CONNECTOR_9PinDIN;
+			*line_mux = CONNECTOR_7PIN_DIN_ENUM_ID1;
+		}
+	}
+
 	/* ASUS HD 3600 XT board lists the DVI port as HDMI */
 	if ((dev->pdev->device == 0x9598) &&
 	    (dev->pdev->subsystem_vendor == 0x1043) &&