[S] Change in coreboot[master]: mb/google/rex: Enable DSP UPD

[Subrata Banik (Code Review)]

Subrata Banik has submitted this change. ( https://review.coreboot.org/c/coreboot/+/67270 )

Change subject: mb/google/rex: Enable DSP UPD
......................................................................

mb/google/rex: Enable DSP UPD

Enable DSP setting. Make sure the SSP can work as expected.

BUG=b:243123156
TEST=Dev beep working on Rex.

Signed-off-by: Eric Lai 
Change-Id: I6ae28e414ac4ac33f596df57691c979eac5fe132
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67270
Reviewed-by: Subrata Banik 
Tested-by: build bot (Jenkins) 
Reviewed-by: Ivy Jian 
Reviewed-by: Tarun Tuli 
---
M src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb
1 file changed, 25 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Subrata Banik: Looks good to me, approved
  Ivy Jian: Looks good to me, approved
  Tarun Tuli: Looks good to me, approved

diff --git a/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb b/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb
index 3471c7e..1f079e29 100644
--- a/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb
+++ b/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb
@@ -20,6 +20,11 @@
    	[PchSerialIoIndexUART2] = PchSerialIoDisabled,
    }"

+	register "pch_hda_dsp_enable" = "1"
+	register "pch_hda_idisp_link_tmode" = "HDA_TMODE_8T"
+	register "pch_hda_idisp_link_frequency" = "HDA_LINKFREQ_96MHZ"
+	register "pch_hda_idisp_codec_enable" = "1"
+
    device domain 0 on
    	device ref igpu on end
    	device ref dtt on end