drm/i2c: tda998x: increase the supported dotclock frequency to 165MHz for TDA19988

Spec sheet states that the TDA19988 supports up to 165MHz dotclock
speeds. Without this change modes higher than 1080p are un-attainable.

Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/gpu/drm/i2c/tda998x_drv.c

@@ -878,7 +878,10 @@ tda998x_encoder_mode_fixup(struct drm_encoder *encoder,
 static int tda998x_connector_mode_valid(struct drm_connector *connector,
 					struct drm_display_mode *mode)
 {
-	if (mode->clock > 150000)
+	/* TDA19988 dotclock can go up to 165MHz */
+	struct tda998x_priv *priv = conn_to_tda998x_priv(connector);
+
+	if (mode->clock > ((priv->rev == TDA19988) ? 165000 : 150000))
 		return MODE_CLOCK_HIGH;
 	if (mode->htotal >= BIT(13))
 		return MODE_BAD_HVALUE;