diff options
| author | Ben Zhang <benzh@chromium.org> | 2014-12-10 17:44:18 -0800 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2015-04-10 20:21:34 +0200 |
| commit | b7f328f6a2a9985a66f6df603e46cda531f933c4 (patch) | |
| tree | b5f89c2f7ed4bdbc694a019b567a5bc0b4a7d929 /src/mainboard | |
| parent | 99e952d480ec9c1a874556f3b3681c6342c29f4b (diff) | |
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>
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/google/samus/acpi/mainboard.asl | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mainboard/google/samus/acpi/mainboard.asl b/src/mainboard/google/samus/acpi/mainboard.asl index 4d905f5c90..918e56580b 100644 --- a/src/mainboard/google/samus/acpi/mainboard.asl +++ b/src/mainboard/google/samus/acpi/mainboard.asl @@ -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 }, |