[Intel-gfx] [PATCH v2 1/3] i915/dp: add intel_dp_tps3_supported helper

[Jani Nikula]

We can add this to drm dp helpers later.

Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 9e90a2be22fa..12096c1df622 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1222,6 +1222,13 @@ intel_dp_sink_rates(struct intel_dp *intel_dp, const int **sink_rates)
 	return (intel_dp_max_link_bw(intel_dp) >> 3) + 1;
 }
 
+static inline bool
+intel_dp_tps3_supported(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
+{
+	return dpcd[DP_DPCD_REV] >= 0x12 &&
+		dpcd[DP_MAX_LANE_COUNT] & DP_TPS3_SUPPORTED;
+}
+
 static bool intel_dp_source_supports_hbr2(struct drm_device *dev)
 {
 	/* WaDisableHBR2:skl */
-- 
2.1.4