Reviewed-by: Gilad Broner <gbroner@xxxxxxxxxxxxxx>
> Some UFS devices (and may be host) have issues if LCC is
> enabled. So we are setting PA_Local_TX_LCC_Enable to 0
> before link startup which will make sure that both host
> and device TX LCC are disabled once link startup is
> completed.
>
> Signed-off-by: Yaniv Gardi <ygardi@xxxxxxxxxxxxxx>
>
> ---
> drivers/scsi/ufs/ufs-qcom.c | 27 ++++++++++++++++++++-------
> drivers/scsi/ufs/unipro.h | 1 +
> 2 files changed, 21 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
> index ed57729..966bacf 100644
> --- a/drivers/scsi/ufs/ufs-qcom.c
> +++ b/drivers/scsi/ufs/ufs-qcom.c
> @@ -16,8 +16,8 @@
> #include <linux/of.h>
> #include <linux/platform_device.h>
> #include <linux/phy/phy.h>
> -
> #include <linux/phy/phy-qcom-ufs.h>
> +
> #include "ufshcd.h"
> #include "ufshcd-pltfrm.h"
> #include "unipro.h"
> @@ -106,9 +106,11 @@ static void ufs_qcom_disable_lane_clks(struct
> ufs_qcom_host *host)
> if (!host->is_lane_clks_enabled)
> return;
>
> - clk_disable_unprepare(host->tx_l1_sync_clk);
> + if (host->hba->lanes_per_direction > 1)
> + clk_disable_unprepare(host->tx_l1_sync_clk);
> clk_disable_unprepare(host->tx_l0_sync_clk);
> - clk_disable_unprepare(host->rx_l1_sync_clk);
> + if (host->hba->lanes_per_direction > 1)
> + clk_disable_unprepare(host->rx_l1_sync_clk);
> clk_disable_unprepare(host->rx_l0_sync_clk);
>
> host->is_lane_clks_enabled = false;
> @@ -272,9 +274,8 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba
> *hba)
> ret = ufs_qcom_phy_calibrate_phy(phy, is_rate_B);
>
> if (ret) {
> - dev_err(hba->dev,
> - "%s: ufs_qcom_phy_calibrate_phy()failed, ret = %d\n",
> - __func__, ret);
> + dev_err(hba->dev, "%s: ufs_qcom_phy_calibrate_phy() failed, ret =
> %d\n",
> + __func__, ret);
> goto out;
> }
>
> @@ -524,6 +525,18 @@ static int ufs_qcom_link_startup_notify(struct
> ufs_hba *hba,
> err = ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba,
> 150);
>
> + /*
> + * Some UFS devices (and may be host) have issues if LCC is
> + * enabled. So we are setting PA_Local_TX_LCC_Enable to 0
> + * before link startup which will make sure that both host
> + * and device TX LCC are disabled once link startup is
> + * completed.
> + */
> + if (ufshcd_get_local_unipro_ver(hba) != UFS_UNIPRO_VER_1_41)
> + err = ufshcd_dme_set(hba,
> + UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE),
> + 0);
> +
> break;
> case POST_CHANGE:
> ufs_qcom_link_startup_post_change(hba);
> @@ -1542,7 +1555,7 @@ static int ufs_qcom_probe(struct platform_device
> *pdev)
> * ufs_qcom_remove - set driver_data of the device to NULL
> * @pdev: pointer to platform device handle
> *
> - * Always return 0
> + * Always returns 0
> */
> static int ufs_qcom_remove(struct platform_device *pdev)
> {
> diff --git a/drivers/scsi/ufs/unipro.h b/drivers/scsi/ufs/unipro.h
> index 8082020..e2854e4 100644
> --- a/drivers/scsi/ufs/unipro.h
> +++ b/drivers/scsi/ufs/unipro.h
> @@ -75,6 +75,7 @@
> #define PA_MAXRXSPEEDFAST 0x1541
> #define PA_MAXRXSPEEDSLOW 0x1542
> #define PA_TXLINKSTARTUPHS 0x1544
> +#define PA_LOCAL_TX_LCC_ENABLE 0x155E
> #define PA_TXSPEEDFAST 0x1565
> #define PA_TXSPEEDSLOW 0x1566
> #define PA_REMOTEVERINFO 0x15A0
> --
> 1.8.5.2
>
> --
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> of Code Aurora Forum, hosted by The Linux Foundation
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