[PATCH v2 21/25] drm/i915/xe2hpd: Set maximum DP rate to UHBR13.5

[Balasubramani Vivekanandan]

Max supported speed by xe2hpd is UHBR13.5. Limit the max DP source rate
to it.

Bspec: 67066

Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanan...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c 
b/drivers/gpu/drm/i915/display/intel_dp.c
index b393ddbb7b35..d9d37f4971dd 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -466,6 +466,9 @@ static int mtl_max_source_rate(struct intel_dp *intel_dp)
        if (intel_encoder_is_c10phy(encoder))
                return 810000;
 
+       if (DISPLAY_VER_FULL(to_i915(encoder->base.dev)) == IP_VER(14, 1))
+               return 1350000;
+
        return 2000000;
 }
 
-- 
2.25.1