From: Libin Yang <libin.yang@xxxxxxxxxxxxxxx>
When bootup, audio driver may not know it is MST or not. The audio
driver will poll all the port & pipe combinations in either MST or
Non-MST mode. get_saved_enc() should handle this situation.
Signed-off-by: Libin Yang <libin.yang@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_audio.c | 32 ++++++++++++++++++++++++++++----
1 file changed, 28 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index 49f1053..c8a1345 100644
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -737,25 +737,49 @@ static int i915_audio_component_get_cdclk_freq(struct device *kdev)
return dev_priv->cdclk_freq;
}
+/*
+ * get the intel_encoder according to the parameter port and pipe
+ * intel_encoder is saved by the index of pipe
+ * MST & (pipe >= 0): return the av_enc_map[pipe],
+ * when port is matched
+ * MST & (pipe < 0): this is invalid
+ * Non-MST & (pipe >= 0): only pipe = 0 (the first device entry)
+ * will get the right intel_encoder with port matched
+ * Non-MST & (pipe < 0): get the right intel_encoder with port matched
+ */
static struct intel_encoder *get_saved_enc(struct drm_i915_private *dev_priv,
int port, int pipe)
{
+ struct intel_encoder *encoder;
if (WARN_ON(pipe >= I915_MAX_PIPES))
return NULL;
/* MST */
- if (pipe >= 0)
- return dev_priv->av_enc_map[pipe];
+ if (pipe >= 0) {
+ encoder = dev_priv->av_enc_map[pipe];
+ /*
+ * when bootup, audio driver may not know it is
+ * MST or not. So it will poll all the port & pipe
+ * combinations
+ */
+ if (encoder != NULL && encoder->port == port &&
+ encoder->type == INTEL_OUTPUT_DP_MST)
+ return encoder;
+ }
/* Non-MST */
- for_each_pipe(dev_priv, pipe) {
- struct intel_encoder *encoder;
+ if (pipe > 0)
+ return NULL;
+ for_each_pipe(dev_priv, pipe) {
encoder = dev_priv->av_enc_map[pipe];
if (encoder == NULL)
continue;
+ if (encoder->type == INTEL_OUTPUT_DP_MST)
+ continue;
+
if (port == encoder->port)
return encoder;
}
--
2.7.4
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