From 9fe2ce802af0751b2df657e487631df8fb60ab9f Mon Sep 17 00:00:00 2001 From: Kenneth Chan Date: Mon, 20 Dec 2021 12:16:03 +0800 Subject: mb/google/guybrush/var/dewatt: update USB 2.0 Lane Parameter settings for USB ports Tune the USB phy settings to update txpreempamptune to 3 and txvreftune to 6 for passing USB 2.0 SI Eye diagram measurement (port 0/1/4). BUG=b:199468920 TEST= emerge-guybrush coreboot; pass USB 2.0 SI Eye diagram measurement. Signed-off-by: Kenneth Chan Change-Id: Ie46c9019186f1893d736fc2806ab74a4f1171be7 Reviewed-on: https://review.coreboot.org/c/coreboot/+/60239 Tested-by: build bot (Jenkins) Reviewed-by: Rob Barnes --- .../guybrush/variants/dewatt/overridetree.cb | 40 ++++++++++++++++++++++ 1 file changed, 40 insertions(+) (limited to 'src/mainboard/google/guybrush') diff --git a/src/mainboard/google/guybrush/variants/dewatt/overridetree.cb b/src/mainboard/google/guybrush/variants/dewatt/overridetree.cb index 9366ea6de7ef..f3fd0e6f1f58 100644 --- a/src/mainboard/google/guybrush/variants/dewatt/overridetree.cb +++ b/src/mainboard/google/guybrush/variants/dewatt/overridetree.cb @@ -18,6 +18,46 @@ chip soc/amd/cezanne register "telemetry_vddcrsocfull_scale_current_mA" = "30314" #mA register "telemetry_vddcrsocoffset" = "560" + #USB 2.0 phy config + register "usb_phy" = "{ + /* Left USB C0 Port */ + .Usb2PhyPort[0] = { + .compdstune = 3, + .sqrxtune = 3, + .txfslstune = 3, + .txpreempamptune = 3, + .txpreemppulsetune = 0, + .txrisetune = 1, + .txvreftune = 6, + .txhsxvtune = 3, + .txrestune = 1, + }, + /* Left USB A0 Port */ + .Usb2PhyPort[1] = { + .compdstune = 3, + .sqrxtune = 3, + .txfslstune = 3, + .txpreempamptune = 3, + .txpreemppulsetune = 0, + .txrisetune = 1, + .txvreftune = 6, + .txhsxvtune = 3, + .txrestune = 1, + }, + /* Right USB C1 Port */ + .Usb2PhyPort[4] = { + .compdstune = 3, + .sqrxtune = 3, + .txfslstune = 3, + .txpreempamptune = 3, + .txpreemppulsetune = 0, + .txrisetune = 1, + .txvreftune = 6, + .txhsxvtune = 3, + .txrestune = 1, + }, + }" + # I2C Config #+-------------------+---------------------------+ #| Field | Value | -- cgit v1.2.3