[PATCH 1/2] drm/i915: fix get digital port issue in intel_audio

[libin.yang@linux.intel.com]

From: Libin Yang <libin.yang@linux.intel.com>

For DP MST, use enc_to_mst(encoder)->primary to get intel_digital_port,
instead of using enc_to_dig_port(encoder).

Signed-off-by: Libin Yang <libin.yang@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_audio.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index 31f6d21..431487a0 100644
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -187,6 +187,16 @@ static bool intel_eld_uptodate(struct drm_connector *connector,
 	return true;
 }
 
+static struct intel_digital_port *
+intel_encoder_to_dig_port(struct intel_encoder *intel_encoder)
+{
+	struct drm_encoder *encoder = &intel_encoder->base;
+
+	if (intel_encoder->type == INTEL_OUTPUT_DP_MST)
+		return enc_to_mst(encoder)->primary;
+	return enc_to_dig_port(encoder);
+}
+
 static void g4x_audio_codec_disable(struct intel_encoder *encoder)
 {
 	struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
@@ -286,7 +296,7 @@ static void hsw_audio_codec_enable(struct drm_connector *connector,
 	struct i915_audio_component *acomp = dev_priv->audio_component;
 	const uint8_t *eld = connector->eld;
 	struct intel_digital_port *intel_dig_port =
-		enc_to_dig_port(&encoder->base);
+		intel_encoder_to_dig_port(encoder);
 	enum port port = intel_dig_port->port;
 	uint32_t tmp;
 	int len, i;
@@ -500,7 +510,8 @@ void intel_audio_codec_enable(struct intel_encoder *intel_encoder)
 	struct drm_device *dev = encoder->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct i915_audio_component *acomp = dev_priv->audio_component;
-	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
+	struct intel_digital_port *intel_dig_port =
+		intel_encoder_to_dig_port(intel_encoder);
 	enum port port = intel_dig_port->port;
 
 	connector = drm_select_eld(encoder);
@@ -546,7 +557,8 @@ void intel_audio_codec_disable(struct intel_encoder *intel_encoder)
 	struct drm_device *dev = encoder->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct i915_audio_component *acomp = dev_priv->audio_component;
-	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
+	struct intel_digital_port *intel_dig_port =
+		intel_encoder_to_dig_port(intel_encoder);
 	enum port port = intel_dig_port->port;
 
 	if (dev_priv->display.audio_codec_disable)
@@ -724,7 +736,8 @@ static int i915_audio_component_get_eld(struct device *dev, int port,
 	/* intel_encoder might be NULL for DP MST */
 	if (intel_encoder) {
 		ret = 0;
-		intel_dig_port = enc_to_dig_port(&intel_encoder->base);
+		intel_dig_port =
+			intel_encoder_to_dig_port(intel_encoder);
 		*enabled = intel_dig_port->audio_connector != NULL;
 		if (*enabled) {
 			eld = intel_dig_port->audio_connector->eld;
-- 
1.9.1

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