drm/i915: Bump max TMDS bitrate to 6 Gbps on ADL-S/ADL-P/DG2+

Bspec lists the mas TMDS bitrate as 6 Gbps on ADL-S/ADL-P/DG2.
Bump our limit to match.

v2: Bump for ADL-S as well (Jani)

Cc: Jani Nikula <[email protected]>
Signed-off-by: Ville Syrjälä <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Reviewed-by: Jani Nikula <[email protected]>

Author: vsyrjala

drivers/gpu/drm/i915/display/intel_hdmi.c

@@ -1784,7 +1784,9 @@ static int intel_hdmi_source_max_tmds_clock(struct intel_encoder *encoder)
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	int max_tmds_clock, vbt_max_tmds_clock;
 
-	if (DISPLAY_VER(dev_priv) >= 10)
+	if (DISPLAY_VER(dev_priv) >= 13 || IS_ALDERLAKE_S(dev_priv))
+		max_tmds_clock = 600000;
+	else if (DISPLAY_VER(dev_priv) >= 10)
 		max_tmds_clock = 594000;
 	else if (DISPLAY_VER(dev_priv) >= 8 || IS_HASWELL(dev_priv))
 		max_tmds_clock = 300000;