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samus: Use codec internal 1.8V as DACREF source 

This is needed for audio playback after we disconnect PP1800_CODEC
from DACREF to avoid noise coupled on PP1800_CODEC, which makes
recording noisy.

For recording, DACREF comes from mic vref pump voltage.
For playback, DACREF comes from internal 1.8V.

BUG=chrome-os-partner:32953
BRANCH=samus
TEST=Set MICBIAS to 2.970V on Samus, playback/recording is clean

Change-Id: I65fb6dbfab54c7c4de6496fd4a0d666baead28ec
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Original-Commit-Id: 3e62a61f6cf6042f6d653a827698b55ac86e2d2b
Original-Change-Id: I27430691e469dd7f4056d99438ce080062b58b9a
Original-Signed-off-by: Ben Zhang <benzh@chromium.org>
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/241179
Reviewed-on: http://review.coreboot.org/9500
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Ben Zhang 2014-12-10 17:44:18 -08:00 committed by Stefan Reinauer
parent 99e952d480
commit b7f328f6a2
1 changed files with 2 additions and 0 deletions
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2
src/mainboard/google/samus/acpi/mainboard.asl
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@ -170,6 +170,7 @@ Scope (\_SB.PCI0.I2C0)
Name (WAKE, 45) /* DSP_INT (use as codec wake) */
Name (MB1, 1) /* MICBIAS1 = 2.970V */
Name (DACR, 1) /* Use codec internal 1.8V as DACREF source */
Name (DCLK, 0) /* RT5677_DMIC_CLK1 */
Name (PCLK, 1) /* RT5677_PDM_CLK_DIV2 (~3MHz) */
Name (IN1, 1) /* IN1 differential */
@ -187,6 +188,7 @@ Scope (\_SB.PCI0.I2C0)
ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package () {
Package () { "realtek,micbias1", 1 },
Package () { "realtek,internal-dacref-en", 1 },
Package () { "realtek,in1-differential", 1 },
Package () { "realtek,in2-differential", 0 },
Package () { "realtek,lout1-differential", 1 },