On Tue, Jun 16, 2020 at 07:32:46PM +0300, Souza, Jose wrote: > On Tue, 2020-06-16 at 17:18 +0300, Imre Deak wrote: > > 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. > > Can you point to place where dp_tp_ctl is used and cause this? All > the MST code paths uses the dp_tp_ctl of the main intel_dp(the one > that is not a mst connector). During a slave stream disabling when waiting for the ACT sent flag for that stream. > > > > > This change replaces > > https://patchwork.freedesktop.org/patch/369577/?series=78193&rev=1 > > which just papered over the problem. > > > > Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > Cc: José Roberto de Souza <jose.souza@xxxxxxxxx> > > Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx> > > --- > > 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); > > + } > > Also not sure how change only in the config readout would fix the issue, After a modeset we'll verify the HW state. The readout for a slave stream CRTC (get_pipe_config) running after the master CRTC's readout will overwrite the dp_tp reg addresses. The other instance of dp_tp register address init (in tgl_ddi_pre_enable_dp()) is correct. > IFWI don't enable MST so when i915 takes over a full modeset will > happen to enable MST and only dp_tp_ctl of the main intel_dp(the one > that is not a mst connector) will be set, check > tgl_ddi_pre_enable_dp(). > > > + > > pipe_config->has_audio = > > intel_ddi_is_audio_enabled(dev_priv, cpu_transcoder); > > _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
