lkml.org 
[lkml]   [2017]   [Mar]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v4 1/8] phy: phy-mt65xx-usb3: improve RX detection stable time
From
Date
Hi Kishon,

Do you have any comments or suggestions on the series of patches?

Thanks a lot

On Sat, 2017-03-11 at 14:22 +0800, Chunfeng Yun wrote:
> The default value of RX detection stable time is 10us, and this
> margin is too big for some critical cases which cause U3 link fail
> and link to U2(probability is about 1%). So change it to 5us.
>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---
> drivers/phy/phy-mt65xx-usb3.c | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/drivers/phy/phy-mt65xx-usb3.c b/drivers/phy/phy-mt65xx-usb3.c
> index d972067..fe2392a 100644
> --- a/drivers/phy/phy-mt65xx-usb3.c
> +++ b/drivers/phy/phy-mt65xx-usb3.c
> @@ -112,6 +112,14 @@
> #define P3D_RG_CDR_BIR_LTD0 GENMASK(12, 8)
> #define P3D_RG_CDR_BIR_LTD0_VAL(x) ((0x1f & (x)) << 8)
>
> +#define U3P_U3_PHYD_RXDET1 (SSUSB_SIFSLV_U3PHYD_BASE + 0x128)
> +#define P3D_RG_RXDET_STB2_SET GENMASK(17, 9)
> +#define P3D_RG_RXDET_STB2_SET_VAL(x) ((0x1ff & (x)) << 9)
> +
> +#define U3P_U3_PHYD_RXDET2 (SSUSB_SIFSLV_U3PHYD_BASE + 0x12c)
> +#define P3D_RG_RXDET_STB2_SET_P3 GENMASK(8, 0)
> +#define P3D_RG_RXDET_STB2_SET_P3_VAL(x) (0x1ff & (x))
> +
> #define U3P_XTALCTL3 (SSUSB_SIFSLV_SPLLC + 0x0018)
> #define XC3_RG_U3_XTAL_RX_PWD BIT(9)
> #define XC3_RG_U3_FRC_XTAL_RX_PWD BIT(8)
> @@ -295,6 +303,16 @@ static void phy_instance_init(struct mt65xx_u3phy *u3phy,
> tmp |= P3D_RG_CDR_BIR_LTD0_VAL(0xc) | P3D_RG_CDR_BIR_LTD1_VAL(0x3);
> writel(tmp, port_base + U3P_PHYD_CDR1);
>
> + tmp = readl(port_base + U3P_U3_PHYD_RXDET1);
> + tmp &= ~P3D_RG_RXDET_STB2_SET;
> + tmp |= P3D_RG_RXDET_STB2_SET_VAL(0x10);
> + writel(tmp, port_base + U3P_U3_PHYD_RXDET1);
> +
> + tmp = readl(port_base + U3P_U3_PHYD_RXDET2);
> + tmp &= ~P3D_RG_RXDET_STB2_SET_P3;
> + tmp |= P3D_RG_RXDET_STB2_SET_P3_VAL(0x10);
> + writel(tmp, port_base + U3P_U3_PHYD_RXDET2);
> +
> dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
> }
>


\
 
 \ /
  Last update: 2017-03-21 02:23    [W:0.068 / U:4.576 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site