diff options
| -rw-r--r-- | src/mainboard/google/gru/mainboard.c | 9 | ||||
| -rw-r--r-- | src/soc/rockchip/rk3399/include/soc/grf.h | 2 |
2 files changed, 10 insertions, 1 deletions
diff --git a/src/mainboard/google/gru/mainboard.c b/src/mainboard/google/gru/mainboard.c index 8a6cda203d..a2b74badf2 100644 --- a/src/mainboard/google/gru/mainboard.c +++ b/src/mainboard/google/gru/mainboard.c @@ -158,6 +158,15 @@ static void configure_display(void) static void setup_usb(void) { + /* A few magic PHY tuning values that improve eye diagram amplitude + * and make it extra sure we get reliable communication in firmware. */ + /* Set max ODT compensation voltage and current tuning reference. */ + write32(&rk3399_grf->usbphy0_ctrl[3], 0x0fff02e3); + write32(&rk3399_grf->usbphy1_ctrl[3], 0x0fff02e3); + /* Set max pre-emphasis level, only on Kevin PHY0. */ + if (IS_ENABLED(CONFIG_BOARD_GOOGLE_KEVIN)) + write32(&rk3399_grf->usbphy0_ctrl[12], 0xffff00a7); + setup_usb_otg0(); setup_usb_otg1(); } diff --git a/src/soc/rockchip/rk3399/include/soc/grf.h b/src/soc/rockchip/rk3399/include/soc/grf.h index d76b827b89..c1fd690e78 100644 --- a/src/soc/rockchip/rk3399/include/soc/grf.h +++ b/src/soc/rockchip/rk3399/include/soc/grf.h @@ -73,7 +73,7 @@ struct rk3399_grf_regs { u32 reserved11[3]; u32 usbphy0_ctrl[26]; u32 reserved12[6]; - u32 usbphy1[26]; + u32 usbphy1_ctrl[26]; u32 reserved13[0x72f]; u32 soc_con9; u32 reserved14[0x0a]; |