staging: drm/imx: ipuv3-crtc: use external clock for TV Encoder

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/imx-drm/ipuv3-crtc.c

@@ -413,6 +413,8 @@ static int ipu_set_interface_pix_fmt(struct drm_crtc *crtc, u32 encoder_type,
 	ipu_crtc->interface_pix_fmt = pixfmt;
 
 	switch (encoder_type) {
+	case DRM_MODE_ENCODER_DAC:
+	case DRM_MODE_ENCODER_TVDAC:
 	case DRM_MODE_ENCODER_LVDS:
 		ipu_crtc->di_clkflags = IPU_DI_CLKMODE_SYNC |
 			IPU_DI_CLKMODE_EXT;