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| author | James_Chao <james_chao@asus.corp-partner.google.com> | 2019-03-05 12:12:53 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2019-05-07 17:22:40 -0700 |
| commit | 4d7176961b5e2409a84786511076fe5147ccda71 (patch) | |
| tree | 81d785b470b4e7979f30c7487697a9a55bfff207 /driver | |
| parent | 1c228d234fc939692bd054cf09058d2b7073d2fe (diff) | |
| download | chrome-ec-4d7176961b5e2409a84786511076fe5147ccda71.tar.gz | |
ampton: tune the dp mux to improve external monitor compatibility
When the ampton connected to external monitor Viewsonic VX2880,
it can't display normally. We need to tune the mux:
1. modulate DP equalization setting : 12.8dB > 3.6dB
2. modulate Vswing: 15%
BUG=b:131113883
BRANCH=octopus
TEST=Check the monitor VX2880 can display normally.
Change-Id: Id8d32b41b4fdde4799a54e0081b5ddadf3534fba
Reviewed-on: https://chromium-review.googlesource.com/1575886
Commit-Ready: Diana Z <dzigterman@chromium.org>
Tested-by: Justin TerAvest <teravest@chromium.org>
Reviewed-by: Justin TerAvest <teravest@chromium.org>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Diffstat (limited to 'driver')
| -rw-r--r-- | driver/tcpm/ps8xxx.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/driver/tcpm/ps8xxx.h b/driver/tcpm/ps8xxx.h index 6b94b56094..f69bb3e11a 100644 --- a/driver/tcpm/ps8xxx.h +++ b/driver/tcpm/ps8xxx.h @@ -46,6 +46,7 @@ #define IN_HPD BIT(0) #define HPD_IRQ BIT(1) #define PS8XXX_REG_MUX_DP_EQ_CONFIGURATION 0xD3 +#define PS8XXX_REG_MUX_DP_OUTPUT_CONFIGURATION 0xD4 #define PS8XXX_REG_MUX_USB_C2SS_EQ 0xE7 #define PS8XXX_REG_MUX_USB_C2SS_HS_THRESHOLD 0xE8 |