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drm/i915/dp_mst: Enable DSC passthrough

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Enable passing through DSC streams to the sink in last branch devices.

v2:
- Fix the DPCD register address while setting/clearing the passthrough
  flag.

Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231030155843.2251023-25-imre.deak@intel.com
This commit is contained in:
Imre Deak 2023-10-24 13:22:19 +03:00
parent 7c4631ff62
commit 751dbac1a0
1 changed files with 20 additions and 2 deletions
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22
drivers/gpu/drm/i915/display/intel_dp.c
View file

@ -2968,6 +2968,24 @@ intel_dp_sink_set_dsc_decompression(struct intel_connector *connector,
str_enable_disable(enable));
}
static void
intel_dp_sink_set_dsc_passthrough(const struct intel_connector *connector,
bool enable)
{
struct drm_i915_private *i915 = to_i915(connector->base.dev);
struct drm_dp_aux *aux = connector->port ?
connector->port->passthrough_aux : NULL;
if (!aux)
return;
if (write_dsc_decompression_flag(aux,
DP_DSC_PASSTHROUGH_EN, enable) < 0)
drm_dbg_kms(&i915->drm,
"Failed to %s sink compression passthrough state\n",
str_enable_disable(enable));
}
/**
* intel_dp_sink_enable_decompression - Enable DSC decompression in sink/last branch device
* @state: atomic state
@ -2994,7 +3012,7 @@ void intel_dp_sink_enable_decompression(struct intel_atomic_state *state,
!connector->dp.dsc_decompression_aux))
return;
/* TODO: Enable passthrough in the MST last branch device if needed. */
intel_dp_sink_set_dsc_passthrough(connector, true);
intel_dp_sink_set_dsc_decompression(connector, true);
}
@ -3022,7 +3040,7 @@ void intel_dp_sink_disable_decompression(struct intel_atomic_state *state,
return;
intel_dp_sink_set_dsc_decompression(connector, false);
/* TODO: Disable passthrough in the MST last branch device if needed. */
intel_dp_sink_set_dsc_passthrough(connector, false);
}
static void