linux-kernel - Re: [PATCH V3] scsi: ufs: ufs-qcom: add fixup_dev

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Message-ID: <20240930154337.r65qk2bps5jsgbnm@thinkpad>
Date: Mon, 30 Sep 2024 21:13:37 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Manish Pandey <quic_mapa@...cinc.com>
Cc: "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	linux-arm-msm@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, quic_nitirawa@...cinc.com,
	quic_bhaskarv@...cinc.com, quic_narepall@...cinc.com,
	quic_rampraka@...cinc.com, quic_cang@...cinc.com,
	quic_nguyenb@...cinc.com
Subject: Re: [PATCH V3] scsi: ufs: ufs-qcom: add fixup_dev_quirks vops

On Tue, Sep 03, 2024 at 06:45:46PM +0530, Manish Pandey wrote:
> Add fixup_dev_quirk vops in QCOM UFS platforms and provide an initial
> vendor-specific device quirk table to add UFS device specific quirks
> which are enabled only for specified UFS devices.
> 
> - Add DELAY_BEFORE_LPM quirk for Skhynix UFS devices to introduce a
>   delay before VCC is powered off in QCOM platforms.
> - Add DELAY_AFTER_LPM quirk for Toshiba UFS devices to introduce a
>   delay after the VCC power rail is turned off in QCOM platforms.
> - Move UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE quirk from
>   ufs_qcom_apply_dev_quirks to ufs_qcom_dev_fixups.
> 
> Signed-off-by: Manish Pandey <quic_mapa@...cinc.com>

I'd still like to have these quirks in the core driver if they apply to other
platforms as well. But I'll leave it up to you to check with respective device
manufacturers.

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

- Mani

> ---
> 
> Changes from v2:
> - Addressed Mani's comments.
> - Moved quirk for WDC to ufs_qcom_dev_fixups.
> 
> Changes from v2:
> - Integrated Bart’s feedback and consolidated the patches into one.
> ---
>  drivers/ufs/host/ufs-qcom.c | 23 ++++++++++++++++++++---
>  1 file changed, 20 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
> index c87fdc849c62..6a715373d81c 100644
> --- a/drivers/ufs/host/ufs-qcom.c
> +++ b/drivers/ufs/host/ufs-qcom.c
> @@ -828,12 +828,28 @@ static int ufs_qcom_apply_dev_quirks(struct ufs_hba *hba)
>  	if (hba->dev_quirks & UFS_DEVICE_QUIRK_HOST_PA_SAVECONFIGTIME)
>  		err = ufs_qcom_quirk_host_pa_saveconfigtime(hba);
>  
> -	if (hba->dev_info.wmanufacturerid == UFS_VENDOR_WDC)
> -		hba->dev_quirks |= UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE;
> -
>  	return err;
>  }
>  
> +/* UFS device-specific quirks */
> +static struct ufs_dev_quirk ufs_qcom_dev_fixups[] = {
> +	{ .wmanufacturerid = UFS_VENDOR_SKHYNIX,
> +	  .model = UFS_ANY_MODEL,
> +	  .quirk = UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM },
> +	{ .wmanufacturerid = UFS_VENDOR_TOSHIBA,
> +	  .model = UFS_ANY_MODEL,
> +	  .quirk = UFS_DEVICE_QUIRK_DELAY_AFTER_LPM },
> +	{ .wmanufacturerid = UFS_VENDOR_WDC,
> +	  .model = UFS_ANY_MODEL,
> +	  .quirk = UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE },
> +	{}
> +};
> +
> +static void ufs_qcom_fixup_dev_quirks(struct ufs_hba *hba)
> +{
> +	ufshcd_fixup_dev_quirks(hba, ufs_qcom_dev_fixups);
> +}
> +
>  static u32 ufs_qcom_get_ufs_hci_version(struct ufs_hba *hba)
>  {
>  	return ufshci_version(2, 0);
> @@ -1801,6 +1817,7 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
>  	.link_startup_notify    = ufs_qcom_link_startup_notify,
>  	.pwr_change_notify	= ufs_qcom_pwr_change_notify,
>  	.apply_dev_quirks	= ufs_qcom_apply_dev_quirks,
> +	.fixup_dev_quirks       = ufs_qcom_fixup_dev_quirks,
>  	.suspend		= ufs_qcom_suspend,
>  	.resume			= ufs_qcom_resume,
>  	.dbg_register_dump	= ufs_qcom_dump_dbg_regs,
> -- 
> 2.17.1
> 

-- 
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