Re: [PATCH 1/6] scsi: ufs: ufs-qcom: Setup host power mode during init

Nitin Rawat
2023-09-14T12:40:27Z

On 9/11/2023 11:29 AM, Can Guo wrote:
> Setup host power mode and its limitations during UFS host driver init to
> avoid repetitive work during every power mode change.
>
> Co-developed-by: Bao D. Nguyen <quic_nguyenb@quicinc.com>
> Signed-off-by: Can Guo <quic_cang@quicinc.com>
> Signed-off-by: Bao D. Nguyen <quic_nguyenb@quicinc.com>

Hi Can,

Patch looks good. Please can you just change the order of Signed-off-by.
I think it should be like below:

Co-developed-by: Bao D. Nguyen <quic_nguyenb@quicinc.com>
Signed-off-by: Bao D. Nguyen <quic_nguyenb@quicinc.com>
Signed-off-by: Can Guo <quic_cang@quicinc.com>

--Nitin

> ---
> drivers/ufs/host/ufs-qcom.c | 27 ++++++++++++++++++---------
> drivers/ufs/host/ufs-qcom.h | 1 +
> 2 files changed, 19 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
> index c3215d3..710f079 100644
> --- a/drivers/ufs/host/ufs-qcom.c
> +++ b/drivers/ufs/host/ufs-qcom.c
> @@ -443,7 +443,11 @@ static u32 ufs_qcom_get_hs_gear(struct ufs_hba *hba)
> static int ufs_qcom_power_up_sequence(struct ufs_hba *hba)
> {
> struct ufs_qcom_host *host = ufshcd_get_variant(hba);
> + struct ufs_dev_params *host_pwr_cap = &host->host_pwr_cap;
> struct phy *phy = host->generic_phy;
> + enum phy_mode mode = host_pwr_cap->hs_rate == PA_HS_MODE_B ?
> + PHY_MODE_UFS_HS_B :
> + PHY_MODE_UFS_HS_A;
> int ret;
>
> /* Reset UFS Host Controller and PHY */
> @@ -460,7 +464,7 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba)
> return ret;
> }
>
> - phy_set_mode_ext(phy, PHY_MODE_UFS_HS_B, host->phy_gear);
> + phy_set_mode_ext(phy, mode, host->phy_gear);
>
> /* power on phy - start serdes and phy's power and clocks */
> ret = phy_power_on(phy);
> @@ -884,7 +888,6 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
> struct ufs_pa_layer_attr *dev_req_params)
> {
> struct ufs_qcom_host *host = ufshcd_get_variant(hba);
> - struct ufs_dev_params ufs_qcom_cap;
> int ret = 0;
>
> if (!dev_req_params) {
> @@ -894,13 +897,7 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
>
> switch (status) {
> case PRE_CHANGE:
> - ufshcd_init_pwr_dev_param(&ufs_qcom_cap);
> - ufs_qcom_cap.hs_rate = UFS_QCOM_LIMIT_HS_RATE;
> -
> - /* This driver only supports symmetic gear setting i.e., hs_tx_gear == hs_rx_gear */
> - ufs_qcom_cap.hs_tx_gear = ufs_qcom_cap.hs_rx_gear = ufs_qcom_get_hs_gear(hba);
> -
> - ret = ufshcd_get_pwr_dev_param(&ufs_qcom_cap,
> + ret = ufshcd_get_pwr_dev_param(&host->host_pwr_cap,
> dev_max_params,
> dev_req_params);
> if (ret) {
> @@ -1037,6 +1034,17 @@ static void ufs_qcom_advertise_quirks(struct ufs_hba *hba)
> hba->quirks |= UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH;
> }
>
> +static void ufs_qcom_set_pwr_mode_limits(struct ufs_hba *hba)
> +{
> + struct ufs_qcom_host *host = ufshcd_get_variant(hba);
> + struct ufs_dev_params *host_pwr_cap = &host->host_pwr_cap;
> +
> + ufshcd_init_pwr_dev_param(host_pwr_cap);
> +
> + /* This driver only supports symmetic gear setting i.e., hs_tx_gear == hs_rx_gear */
> + host_pwr_cap->hs_tx_gear = host_pwr_cap->hs_rx_gear = ufs_qcom_get_hs_gear(hba);
> +}
> +
> static void ufs_qcom_set_caps(struct ufs_hba *hba)
> {
> struct ufs_qcom_host *host = ufshcd_get_variant(hba);
> @@ -1259,6 +1267,7 @@ static int ufs_qcom_init(struct ufs_hba *hba)
> if (err)
> goto out_variant_clear;
>
> + ufs_qcom_set_pwr_mode_limits(hba);
> ufs_qcom_set_caps(hba);
> ufs_qcom_advertise_quirks(hba);
>
> diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h
> index fa54248..4db64d9 100644
> --- a/drivers/ufs/host/ufs-qcom.h
> +++ b/drivers/ufs/host/ufs-qcom.h
> @@ -227,6 +227,7 @@ struct ufs_qcom_host {
>
> struct gpio_desc *device_reset;
>
> + struct ufs_dev_params host_pwr_cap;
> u32 phy_gear;
>
> bool esi_enabled;