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Message-Id: <1728368130-37213-2-git-send-email-shawn.lin@rock-chips.com>
Date: Tue, 8 Oct 2024 14:15:26 +0800
From: Shawn Lin <shawn.lin@...k-chips.com>
To: Rob Herring <robh+dt@...nel.org>,
"James E . J . Bottomley" <James.Bottomley@...senPartnership.com>,
"Martin K . Petersen" <martin.petersen@...cle.com>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Ulf Hansson <ulf.hansson@...aro.org>,
Heiko Stuebner <heiko@...ech.de>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
Alim Akhtar <alim.akhtar@...sung.com>,
Avri Altman <avri.altman@....com>,
Bart Van Assche <bvanassche@....org>,
YiFeng Zhao <zyf@...k-chips.com>,
Liang Chen <cl@...k-chips.com>,
linux-scsi@...r.kernel.org,
linux-rockchip@...ts.infradead.org,
linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org,
linux-pm@...r.kernel.org,
Shawn Lin <shawn.lin@...k-chips.com>
Subject: [PATCH v3 1/5] scsi: ufs: core: Add UFSHCI_QUIRK_DME_RESET_ENABLE_AFTER_HCE
HCE on Rockchip SoC is different from both of ufshcd_hba_execute_hce()
and UFSHCI_QUIRK_BROKEN_HCE case. It need to do dme_reset and dme_enable
after enabling HCE. So in order not to abuse UFSHCI_QUIRK_BROKEN_HCE, add
a new quirk UFSHCI_QUIRK_DME_RESET_ENABLE_AFTER_HCE, to deal with that
limitation.
Suggested-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Signed-off-by: Shawn Lin <shawn.lin@...k-chips.com>
---
Changes in v3: None
Changes in v2: None
drivers/ufs/core/ufshcd.c | 17 +++++++++++++++++
include/ufs/ufshcd.h | 6 ++++++
2 files changed, 23 insertions(+)
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 7cab1031..4868099 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -4819,6 +4819,7 @@ static int ufshcd_hba_execute_hce(struct ufs_hba *hba)
{
int retry_outer = 3;
int retry_inner;
+ int ret;
start:
if (ufshcd_is_hba_active(hba))
@@ -4865,6 +4866,22 @@ static int ufshcd_hba_execute_hce(struct ufs_hba *hba)
/* enable UIC related interrupts */
ufshcd_enable_intr(hba, UFSHCD_UIC_MASK);
+ /*
+ * Do dme_reset and dme_enable if a UFS host controller need
+ * this procedure to actually finish HCE.
+ */
+ if (hba->quirks & UFSHCI_QUIRK_DME_RESET_ENABLE_AFTER_HCE) {
+ ret = ufshcd_dme_reset(hba);
+ if (!ret) {
+ ret = ufshcd_dme_enable(hba);
+ if (ret)
+ dev_err(hba->dev,
+ "Failed to do dme_enable after HCE.\n");
+ } else {
+ dev_err(hba->dev, "Failed to do dme_reset after HCE.\n");
+ }
+ }
+
ufshcd_vops_hce_enable_notify(hba, POST_CHANGE);
return 0;
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index a95282b..73b888f 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -685,6 +685,12 @@ enum ufshcd_quirks {
* single doorbell mode.
*/
UFSHCD_QUIRK_BROKEN_LSDBS_CAP = 1 << 25,
+
+ /*
+ * This quirks needs to be enabled if host controller need to
+ * do dme_reset and dme_enable after hce.
+ */
+ UFSHCI_QUIRK_DME_RESET_ENABLE_AFTER_HCE = 1 << 26,
};
enum ufshcd_caps {
--
2.7.4
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