[coreboot-gerrit] Change in coreboot[master]: mb/google/volteer: Enable Audio DSP UPD

[Furquan Shaikh (Code Review)]

Furquan Shaikh has submitted this change. ( https://review.coreboot.org/c/coreboot/+/39356 )

Change subject: mb/google/volteer: Enable Audio DSP UPD
......................................................................

mb/google/volteer: Enable Audio DSP UPD

Provide settings for configuring the link between HD-Audio controller
and display unit for purposes of HDMI/DP Audio playback.

BUG=b:144708516, b:148385924
TEST=none

Change-Id: I225faac68729b28be65b4d8f1f83769a874f84ff
Signed-off-by: Nick Vaccaro 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39356
Reviewed-by: Furquan Shaikh 
Tested-by: build bot (Jenkins) 
---
M src/mainboard/google/volteer/variants/baseboard/devicetree.cb
1 file changed, 15 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Furquan Shaikh: Looks good to me, approved

diff --git a/src/mainboard/google/volteer/variants/baseboard/devicetree.cb b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
index a65e5f1..84d121f 100644
--- a/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
@@ -110,6 +110,21 @@
    	[PchSerialIoIndexUART2] = PchSerialIoDisabled,
    }"

+	# HD Audio
+	register "PchHdaDspEnable" = "1"
+	register "PchHdaAudioLinkHdaEnable" = "0"
+	register "PchHdaAudioLinkDmicEnable[0]" = "1"
+	register "PchHdaAudioLinkDmicEnable[1]" = "1"
+	register "PchHdaAudioLinkSspEnable[0]" = "1"
+	register "PchHdaAudioLinkSspEnable[1]" = "1"
+        # iDisp-Link T-Mode 0: 2T, 2: 4T, 3: 8T, 4: 16T
+	register "PchHdaIDispLinkTmode" = "2"
+        # iDisp-Link Freq 4: 96MHz, 3: 48MHz.
+	register "PchHdaIDispLinkFrequency" = "4"
+        # Not disconnected/enumerable
+	register "PchHdaIDispCodecDisconnect" = "0"
+
+
    # TCSS USB3
    register "TcssXhciEn" = "1"