drm/i915/ehl: Support HBR3 on EHL combo PHY

Unlike ICL, EHL's combo PHYs can support HBR3 data rates.  Note that
this just extends the upper limit; we will continue to honor the max
data rate specified in the VBT in cases where it is lower than HBR3.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190605211832.23945-1-matthew.d.roper@intel.com
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 24b56b2..b099a9d 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -332,6 +332,7 @@ static int icl_max_source_rate(struct intel_dp *intel_dp)
        enum port port = dig_port->base.port;
 
        if (intel_port_is_combophy(dev_priv, port) &&
+           !IS_ELKHARTLAKE(dev_priv) &&
            !intel_dp_is_edp(intel_dp))
                return 540000;