[Intel-gfx] [PATCH 1/6] drm/i915/tgl+: Use the correct DP_TP_* register instances in MST encoders
Imre Deak
imre.deak at intel.com
Tue Jun 16 14:18:50 UTC 2020
MST encoders must use the master MST transcoder's DP_TP_STATUS and
DP_TP_CONTROL registers. Atm, during the HW readout of a slave
transcoder's CRTC state we reset these register addresses in
intel_dp::regs.dp_tp_* to the slave transcoder's DP_TP_* register
addresses incorrectly; fix this.
This issue led at least to
'Timed out waiting for ACT sent when disabling'
errors during output disabling in a multiple MST stream config.
This change replaces
https://patchwork.freedesktop.org/patch/369577/?series=78193&rev=1
which just papered over the problem.
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: José Roberto de Souza <jose.souza at intel.com>
Signed-off-by: Imre Deak <imre.deak at intel.com>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index ca7bb2294d2b..73d6cc29291a 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -4193,11 +4193,6 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
if (drm_WARN_ON(&dev_priv->drm, transcoder_is_dsi(cpu_transcoder)))
return;
- if (INTEL_GEN(dev_priv) >= 12) {
- intel_dp->regs.dp_tp_ctl = TGL_DP_TP_CTL(cpu_transcoder);
- intel_dp->regs.dp_tp_status = TGL_DP_TP_STATUS(cpu_transcoder);
- }
-
intel_dsc_get_config(encoder, pipe_config);
temp = intel_de_read(dev_priv, TRANS_DDI_FUNC_CTL(cpu_transcoder));
@@ -4299,6 +4294,16 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
break;
}
+ if (INTEL_GEN(dev_priv) >= 12) {
+ enum transcoder transcoder =
+ intel_dp_mst_is_slave_trans(pipe_config) ?
+ pipe_config->mst_master_transcoder :
+ pipe_config->cpu_transcoder;
+
+ intel_dp->regs.dp_tp_ctl = TGL_DP_TP_CTL(transcoder);
+ intel_dp->regs.dp_tp_status = TGL_DP_TP_STATUS(transcoder);
+ }
+
pipe_config->has_audio =
intel_ddi_is_audio_enabled(dev_priv, cpu_transcoder);
--
2.23.1
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