From: Shobhit Kumar <shobhit.kumar at intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar at intel.com>
v2: reuse of just created is_edp_psr and put it at right place.
Signed-off-by: Rodrigo Vivi <rodrigo.vivi at gmail.com>
---
drivers/gpu/drm/i915/intel_dp.c | 12 ++++++++++++
drivers/gpu/drm/i915/intel_drv.h | 1 +
2 files changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index cbd3236..aeb0ef1 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1435,6 +1435,11 @@ static void intel_post_disable_dp(struct intel_encoder *encoder)
}
}
+static bool is_edp_psr(struct intel_dp *intel_dp)
+{
+ return (is_edp(intel_dp) && (intel_dp->psr_dpcd[0] & 0x1));
+}
+
static void intel_enable_dp(struct intel_encoder *encoder)
{
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
@@ -2111,6 +2116,13 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
if (intel_dp->dpcd[DP_DPCD_REV] == 0)
return false; /* DPCD not present */
+ /* Check if the panel supports PSR */
+ memset(intel_dp->psr_dpcd, 0, EDP_PSR_RECEIVER_CAP_SIZE);
+ intel_dp_aux_native_read_retry(intel_dp, DP_PSR_SUPPORT,
+ intel_dp->psr_dpcd,
+ sizeof(intel_dp->psr_dpcd));
+ if (is_edp_psr(intel_dp))
+ DRM_DEBUG_KMS("Detected EDP PSR Panel.\n");
if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
DP_DWN_STRM_PORT_PRESENT))
return true; /* native DP sink */
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index aeff0d1..d4b3bac 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -371,6 +371,7 @@ struct intel_dp {
uint8_t link_bw;
uint8_t lane_count;
uint8_t dpcd[DP_RECEIVER_CAP_SIZE];
+ uint8_t psr_dpcd[EDP_PSR_RECEIVER_CAP_SIZE];
uint8_t downstream_ports[DP_MAX_DOWNSTREAM_PORTS];
struct i2c_adapter adapter;
struct i2c_algo_dp_aux_data algo;
--
1.7.11.7
