Re: [RFC PATCH 4/5] drm: i915: add DisplayPort amp unmute for LPE audio mode

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+#define AUD_PORT_EN_B_DBG		0x62F20
+#define AUD_PORT_EN_C_DBG		0x62F28
+#define AUD_PORT_EN_D_DBG		0x62F2C
These match the spec. But to match the standard i915 convention they
should be called _AUD_PORT_EN_B_DBG etc. Same forthe chicken bit
register.
Actually they just match one version of the spec I had lying around.
Another versions says:

AUD_PORT_EN_B_DBG 0x62F20
AUD_PORT_EN_C_DBG 0x62F30
AUD_PORT_EN_D_DBG 0x62F34
That's it!  Now finally I can hear the audio from DP3 with the
additional patch below.
Wow. Thanks Ville for looking into this, we could have lost a lot of time. Do you happen to know if those previous values are due to poor documentation or a different skew we'd need to support, e.g. with a PCI-Id quirk? At any rate, 2 days to get DP audio working is pretty nice, this was a good week.

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