linux-kernel - Re: [PATCH v1 1/2] scsi: ufs: Add DELAY_BEFORE

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Date:   Wed, 10 Jun 2020 11:06:26 +0200
From:   Bean Huo <huobean@...il.com>
To:     Stanley Chu <stanley.chu@...iatek.com>, linux-scsi@...r.kernel.org,
        martin.petersen@...cle.com, avri.altman@....com,
        alim.akhtar@...sung.com, jejb@...ux.ibm.com,
        asutoshd@...eaurora.org
Cc:     beanhuo@...ron.com, cang@...eaurora.org, matthias.bgg@...il.com,
        bvanassche@....org, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kuohong.wang@...iatek.com, peter.wang@...iatek.com,
        chun-hung.wu@...iatek.com, andy.teng@...iatek.com,
        chaotian.jing@...iatek.com, cc.chou@...iatek.com
Subject: Re: [PATCH v1 1/2] scsi: ufs: Add DELAY_BEFORE_LPM quirk for Micron
 devices

On Wed, 2020-06-10 at 13:36 +0800, Stanley Chu wrote:
> It is confirmed that Micron device needs DELAY_BEFORE_LPM
> quirk to have a delay before VCC is powered off. So add Micron
> vendor ID and this quirk for Micron devices.
> 
> Signed-off-by: Stanley Chu <stanley.chu@...iatek.com>
Reviewed-by: Bean Huo <beanhuo@...ron.com>


Thanks,
Bean

> ---
>  drivers/scsi/ufs/ufs_quirks.h | 1 +
>  drivers/scsi/ufs/ufshcd.c     | 2 ++
>  2 files changed, 3 insertions(+)
> 
> diff --git a/drivers/scsi/ufs/ufs_quirks.h
> b/drivers/scsi/ufs/ufs_quirks.h
> index e3175a63c676..e80d5f26a442 100644
> --- a/drivers/scsi/ufs/ufs_quirks.h
> +++ b/drivers/scsi/ufs/ufs_quirks.h
> @@ -12,6 +12,7 @@
>  #define UFS_ANY_VENDOR 0xFFFF
>  #define UFS_ANY_MODEL  "ANY_MODEL"
>  
> +#define UFS_VENDOR_MICRON      0x12C
>  #define UFS_VENDOR_TOSHIBA     0x198
>  #define UFS_VENDOR_SAMSUNG     0x1CE
>  #define UFS_VENDOR_SKHYNIX     0x1AD
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 04b79ca66fdf..dea4fddf9332 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -216,6 +216,8 @@ ufs_get_desired_pm_lvl_for_dev_link_state(enum
> ufs_dev_pwr_mode dev_state,
>  
>  static struct ufs_dev_fix ufs_fixups[] = {
>  	/* UFS cards deviations table */
> +	UFS_FIX(UFS_VENDOR_MICRON, UFS_ANY_MODEL,
> +		UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM),
>  	UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL,
>  		UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM),
>  	UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL,
> -- 
> 2.18.0