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

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Message-ID: <20240903131546.1141-1-quic_mapa@quicinc.com>
Date: Tue, 3 Sep 2024 18:45:46 +0530
From: Manish Pandey <quic_mapa@...cinc.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        "James E.J.
 Bottomley" <James.Bottomley@...senPartnership.com>,
        "Martin K. Petersen"
	<martin.petersen@...cle.com>
CC: <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_mapa@...cinc.com>,
        <quic_cang@...cinc.com>, <quic_nguyenb@...cinc.com>
Subject: [PATCH V3] scsi: ufs: ufs-qcom: add fixup_dev_quirks vops

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>
---

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