On 10/19/2020 3:51 AM, Shankar, Uma wrote:
-----Original Message-----
From: Nautiyal, Ankit K <ankit.k.nautiyal@xxxxxxxxx>
Sent: Thursday, October 15, 2020 4:23 PM
To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx; Shankar, Uma <uma.shankar@xxxxxxxxx>;
Kulkarni, Vandita <vandita.kulkarni@xxxxxxxxx>; ville.syrjala@xxxxxxxxxxxxxxx;
Sharma, Swati2 <swati2.sharma@xxxxxxxxx>
Subject: [RFC 06/13] drm/i915: Check for FRL training before DP Link training
This patch calls functions to check FRL training requirements for an HDMI2.1 sink,
when connected through PCON.
The call is made before the DP link training. In case FRL is not required or failure
during FRL training, the TMDS mode is selected for the pcon.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 2 ++
drivers/gpu/drm/i915/display/intel_dp.c | 2 ++
2 files changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c
b/drivers/gpu/drm/i915/display/intel_ddi.c
index bb0b9930958f..1834e5de60a7 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3484,6 +3484,8 @@ static void tgl_ddi_pre_enable_dp(struct
intel_atomic_state *state,
if (!is_mst)
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
+intel_dp_check_frl_training(intel_dp);
Good to move it near start_link_training to stay consistent with rest of the calls.
Alright. Will take care in the next version.
Thanks & Regards,
Ankit
+
intel_dp_sink_set_decompression_state(intel_dp, crtc_state, true);
/*
* DDI FEC: "anticipates enabling FEC encoding sets the FEC_READY bit
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
b/drivers/gpu/drm/i915/display/intel_dp.c
index c1342b5e7781..668165dd2b1a 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -4206,6 +4206,7 @@ static void intel_enable_dp(struct intel_atomic_state
*state,
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
intel_dp_configure_protocol_converter(intel_dp);
+intel_dp_check_frl_training(intel_dp);
intel_dp_start_link_train(intel_dp, pipe_config);
intel_dp_stop_link_train(intel_dp, pipe_config);
@@ -6127,6 +6128,7 @@ int intel_dp_retrain_link(struct intel_encoder
*encoder,
!intel_dp_mst_is_master_trans(crtc_state))
continue;
+intel_dp_check_frl_training(intel_dp);
intel_dp_start_link_train(intel_dp, crtc_state);
intel_dp_stop_link_train(intel_dp, crtc_state);
break;
--
2.17.1
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