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authorBen Zhang <benzh@chromium.org>2014-12-10 17:44:18 -0800
committerStefan Reinauer <stefan.reinauer@coreboot.org>2015-04-10 20:21:34 +0200
commitb7f328f6a2a9985a66f6df603e46cda531f933c4 (patch)
treeb5f89c2f7ed4bdbc694a019b567a5bc0b4a7d929 /src/mainboard/ibm
parent99e952d480ec9c1a874556f3b3681c6342c29f4b (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>
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