Re: [PATCH v5 07/10] scsi: ufs: ufs-qcom: Set initial PHY gear to max HS gear for HW ver 5 and newer

Manivannan Sadhasivam
2023-11-28T06:01:06Z

On Thu, Nov 23, 2023 at 12:46:27AM -0800, Can Guo wrote:
> Set the initial PHY gear to max HS gear for hosts with HW ver 5 and newer.
>

MAX_GEAR will be used for hosts with hw_ver.major >= 4

> This patch is not changing any functionalities or logic but only a
> preparation patch for the next patch in this series.
>
> Signed-off-by: Can Guo <quic_cang@quicinc.com>
> ---
> drivers/ufs/host/ufs-qcom.c | 21 +++++++++++++++------
> 1 file changed, 15 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
> index 6756f8d..7bbccf4 100644
> --- a/drivers/ufs/host/ufs-qcom.c
> +++ b/drivers/ufs/host/ufs-qcom.c
> @@ -1067,6 +1067,20 @@ static void ufs_qcom_advertise_quirks(struct ufs_hba *hba)
> hba->quirks |= UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH;
> }
>
> +static void ufs_qcom_set_phy_gear(struct ufs_qcom_host *host)
> +{
> + struct ufs_host_params *host_params = &host->host_params;
> +
> + host->phy_gear = host_params->hs_tx_gear;
> +
> + /*
> + * Power up the PHY using the minimum supported gear (UFS_HS_G2).
> + * Switching to max gear will be performed during reinit if supported.

You need to reword this comment too.

> + */
> + if (host->hw_ver.major < 0x5)

As I mentioned above, MAX_GEAR will be used if hw_ver.major is >=4 in
ufs_qcom_get_hs_gear(). So this check should be (< 0x4).

- Mani

> + host->phy_gear = UFS_HS_G2;
> +}
> +
> static void ufs_qcom_set_host_params(struct ufs_hba *hba)
> {
> struct ufs_qcom_host *host = ufshcd_get_variant(hba);
> @@ -1303,6 +1317,7 @@ static int ufs_qcom_init(struct ufs_hba *hba)
> ufs_qcom_set_caps(hba);
> ufs_qcom_advertise_quirks(hba);
> ufs_qcom_set_host_params(hba);
> + ufs_qcom_set_phy_gear(host);
>
> err = ufs_qcom_ice_init(host);
> if (err)
> @@ -1320,12 +1335,6 @@ static int ufs_qcom_init(struct ufs_hba *hba)
> dev_warn(dev, "%s: failed to configure the testbus %d\n",
> __func__, err);
>
> - /*
> - * Power up the PHY using the minimum supported gear (UFS_HS_G2).
> - * Switching to max gear will be performed during reinit if supported.
> - */
> - host->phy_gear = UFS_HS_G2;
> -
> return 0;
>
> out_variant_clear:
> --
> 2.7.4
>

--
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