[PATCH v1 3/7] ufs: host: mediatek: Add UFS_MTK_CAP_DISABLE_MCQ

[Avri Altman]

> From: Peter Wang <peter.wang at mediatek.com>
> 
> From: Po-Wen Kao <powen.kao at mediatek.com>
> 
> Add new mediatek host cap UFS_MTK_CAP_DISABLE_MCQ to allow disable
> MCQ feature by assigning dts boolean property "mediatek,ufs-disable-mcq""
> 
> Reviewed-by: Peter Wang <peter.wang at mediatek.com>
> Signed-off-by: Peter Wang <peter.wang at mediatek.com>
> Signed-off-by: Po-Wen Kao <powen.kao at mediatek.com>
Reviewed-by: Avri Altman <avri.altman at wdc.com>


> ---
>  drivers/ufs/host/ufs-mediatek.c | 12 ++++++++++++  drivers/ufs/host/ufs-
> mediatek.h |  1 +
>  2 files changed, 13 insertions(+)
> 
> diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
> index 0262e8994236..cdf29cfa490b 100644
> --- a/drivers/ufs/host/ufs-mediatek.c
> +++ b/drivers/ufs/host/ufs-mediatek.c
> @@ -640,6 +640,9 @@ static void ufs_mtk_init_host_caps(struct ufs_hba *hba)
>         if (of_property_read_bool(np, "mediatek,ufs-tx-skew-fix"))
>                 host->caps |= UFS_MTK_CAP_TX_SKEW_FIX;
> 
> +       if (of_property_read_bool(np, "mediatek,ufs-disable-mcq"))
> +               host->caps |= UFS_MTK_CAP_DISABLE_MCQ;
> +
>         dev_info(hba->dev, "caps: 0x%x", host->caps);  }
> 
> @@ -874,6 +877,9 @@ static void ufs_mtk_init_mcq_irq(struct ufs_hba *hba)
>         host->mcq_nr_intr = UFSHCD_MAX_Q_NR;
>         pdev = container_of(hba->dev, struct platform_device, dev);
> 
> +       if (host->caps & UFS_MTK_CAP_DISABLE_MCQ)
> +               goto failed;
> +
>         for (i = 0; i < host->mcq_nr_intr; i++) {
>                 /* irq index 0 is legacy irq, sq/cq irq start from index 1 */
>                 irq = platform_get_irq(pdev, i + 1); @@ -1585,6 +1591,12 @@ static
> int ufs_mtk_clk_scale_notify(struct ufs_hba *hba, bool scale_up,
> 
>  static int ufs_mtk_get_hba_mac(struct ufs_hba *hba)  {
> +       struct ufs_mtk_host *host = ufshcd_get_variant(hba);
> +
> +       /* MCQ operation not permitted */
> +       if (host->caps & UFS_MTK_CAP_DISABLE_MCQ)
> +               return -EPERM;
> +
>         return MAX_SUPP_MAC;
>  }
> 
> diff --git a/drivers/ufs/host/ufs-mediatek.h b/drivers/ufs/host/ufs-mediatek.h
> index 146c25080599..79c64de25254 100644
> --- a/drivers/ufs/host/ufs-mediatek.h
> +++ b/drivers/ufs/host/ufs-mediatek.h
> @@ -143,6 +143,7 @@ enum ufs_mtk_host_caps {
>         UFS_MTK_CAP_ALLOW_VCCQX_LPM            = 1 << 5,
>         UFS_MTK_CAP_PMC_VIA_FASTAUTO           = 1 << 6,
>         UFS_MTK_CAP_TX_SKEW_FIX                = 1 << 7,
> +       UFS_MTK_CAP_DISABLE_MCQ                = 1 << 8,
>  };
> 
>  struct ufs_mtk_crypt_cfg {
> --
> 2.18.0