[Intel-gfx] [PATCH 1/3] drm/i915/cnl: Add allowed DP rates for Cannonlake.

[Rodrigo Vivi]

One warning is that in order to get DPLL Link rates
3240 and 4050 that allows 648000 and 810000 is that:
"Some SKUs may require elevated I/O voltage to support
this."

v2: Rebase on top of source_rates changes.

Cc: Clint Taylor <clinton.a.taylor at intel.com>
Cc: Mika Kahola <mika.kahola at intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 2d42d09..4355bdf 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -97,6 +97,9 @@ struct dp_link_dpll {
 				  324000, 432000, 540000 };
 static const int skl_rates[] = { 162000, 216000, 270000,
 				  324000, 432000, 540000 };
+static const int cnl_rates[] = { 162000, 216000, 270000,
+				 324000, 432000, 540000,
+				 648000, 810000 };
 static const int default_rates[] = { 162000, 270000, 540000 };
 
 /**
@@ -238,6 +241,9 @@ int intel_dp_max_lane_count(struct intel_dp *intel_dp)
 	if (IS_GEN9_LP(dev_priv)) {
 		source_rates = bxt_rates;
 		size = ARRAY_SIZE(bxt_rates);
+	} else if (IS_CANNONLAKE(dev_priv)) {
+		source_rates = cnl_rates;
+		size = ARRAY_SIZE(cnl_rates);
 	} else if (IS_GEN9_BC(dev_priv)) {
 		source_rates = skl_rates;
 		size = ARRAY_SIZE(skl_rates);
-- 
1.9.1