From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
DP 1.3 adds some extra control knobs for DP->HDMI protocol conversion.
Let's use that to configure the "HDMI mode" (ie. infoframes vs. not)
based on the capabilities of the sink.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 1 +
drivers/gpu/drm/i915/display/intel_dp.c | 22 ++++++++++++++++++++++
drivers/gpu/drm/i915/display/intel_dp.h | 1 +
3 files changed, 24 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 818bee4918fa..3d1393ff6435 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3551,6 +3551,7 @@ static void hsw_ddi_pre_enable_dp(struct intel_encoder *encoder,
intel_ddi_init_dp_buf_reg(encoder);
if (!is_mst)
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
+ intel_dp_configure_protocol_converter(intel_dp);
intel_dp_sink_set_decompression_state(intel_dp, crtc_state,
true);
intel_dp_sink_set_fec_ready(intel_dp, crtc_state);
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index c0a638df97c5..d075450a0472 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -3575,6 +3575,27 @@ static void intel_dp_enable_port(struct intel_dp *intel_dp,
intel_de_posting_read(dev_priv, intel_dp->output_reg);
}
+void intel_dp_configure_protocol_converter(struct intel_dp *intel_dp)
+{
+ u8 tmp;
+
+ if (intel_dp->dpcd[DP_DPCD_REV] < 0x13)
+ return;
+
+ if (!drm_dp_is_branch(intel_dp->dpcd))
+ return;
+
+ tmp = intel_dp->has_hdmi_sink ?
+ DP_HDMI_DVI_OUTPUT_CONFIG : 0;
+
+ if (drm_dp_dpcd_writeb(&intel_dp->aux,
+ DP_PROTOCOL_CONVERTER_CONTROL_0, tmp) <= 0)
+ DRM_DEBUG_KMS("Failed to set protocol converter HDMI mode to %s\n",
+ enableddisabled(intel_dp->has_hdmi_sink));
+
+ /* TODO: configure YCbCr 4:2:2/4:2:0 conversion */
+}
+
static void intel_enable_dp(struct intel_encoder *encoder,
const struct intel_crtc_state *pipe_config,
const struct drm_connector_state *conn_state)
@@ -3611,6 +3632,7 @@ static void intel_enable_dp(struct intel_encoder *encoder,
}
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
+ intel_dp_configure_protocol_converter(intel_dp);
intel_dp_start_link_train(intel_dp);
intel_dp_stop_link_train(intel_dp);
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 3da166054788..953197d46444 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -51,6 +51,7 @@ int intel_dp_get_link_train_fallback_values(struct intel_dp *intel_dp,
int intel_dp_retrain_link(struct intel_encoder *encoder,
struct drm_modeset_acquire_ctx *ctx);
void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode);
+void intel_dp_configure_protocol_converter(struct intel_dp *intel_dp);
void intel_dp_sink_set_decompression_state(struct intel_dp *intel_dp,
const struct intel_crtc_state *crtc_state,
bool enable);
--
2.24.1
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