[v4,6/7] Revert "scsi: ufs: disable vccq if it's not needed by UFS device"
diff mbox series

Message ID 817ff724-2a30-99fb-8a92-c77797651bde@free.fr
State New
Headers show
Series
  • UFS on APQ8098/MSM8998
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Commit Message

Marc Gonzalez Feb. 8, 2019, 10:20 p.m. UTC
This reverts commit 60f0187031c05e04cbadffb62f557d0ff3564490.

Calling ufshcd_set_vccq_rail_unused() breaks UFS init on two boards.
I would say that vccq is *not* not needed.

Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
---
 drivers/scsi/ufs/ufs.h    |  1 -
 drivers/scsi/ufs/ufshcd.c | 59 +++------------------------------------
 2 files changed, 4 insertions(+), 56 deletions(-)

Comments

Avri Altman Feb. 9, 2019, 9:07 a.m. UTC | #1
Hi,
> 
> This reverts commit 60f0187031c05e04cbadffb62f557d0ff3564490.
> 
> Calling ufshcd_set_vccq_rail_unused() breaks UFS init on two boards.
> I would say that vccq is *not* not needed.
> 
> Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
> Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
Those  tags got switched off.

I still think that If you are reverting the quirk implementation,
you should remove the quirk listing as well.

Also, as the v3 discussion held on several threads,
and new people might be joining in, 
maybe you could reply to this patch with a couple of sentences summing-up
the various theories that this bring-up raised.

Thanks,
Avri
Marc Gonzalez Feb. 9, 2019, 9:54 a.m. UTC | #2
On 09/02/2019 10:07, Avri Altman wrote:

> On 08/02/2019 23:20, Marc Gonzalez wrote:
>
>> This reverts commit 60f0187031c05e04cbadffb62f557d0ff3564490.
>>
>> Calling ufshcd_set_vccq_rail_unused() breaks UFS init on two boards.
>> I would say that vccq is *not* not needed.
>>
>> Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
>> Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
>
> Those tags got switched off.

What do you mean?

> I still think that If you are reverting the quirk implementation,
> you should remove the quirk listing as well.

You're right, of course. I just thought it could wait until
after this series was accepted, but I can fold it in v5, as
a follow-up patch.

> Also, as the v3 discussion held on several threads,
> and new people might be joining in, 
> maybe you could reply to this patch with a couple of sentences summing-up
> the various theories that this bring-up raised.

Will do in v5, either in the commit message, or in the
sub-text that is not committed.

Regards.

Patch
diff mbox series

diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h
index 6d176815e6ce..21e4ccb5ba6e 100644
--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -514,7 +514,6 @@  struct ufs_vreg {
 	struct regulator *reg;
 	const char *name;
 	bool enabled;
-	bool unused;
 	int min_uV;
 	int max_uV;
 	int min_uA;
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 4bc55a2f5689..c78f5f199aff 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -254,7 +254,6 @@  static int ufshcd_probe_hba(struct ufs_hba *hba);
 static int __ufshcd_setup_clocks(struct ufs_hba *hba, bool on,
 				 bool skip_ref_clk);
 static int ufshcd_setup_clocks(struct ufs_hba *hba, bool on);
-static int ufshcd_set_vccq_rail_unused(struct ufs_hba *hba, bool unused);
 static int ufshcd_uic_hibern8_exit(struct ufs_hba *hba);
 static int ufshcd_uic_hibern8_enter(struct ufs_hba *hba);
 static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba);
@@ -5857,11 +5856,6 @@  static int ufshcd_probe_hba(struct ufs_hba *hba)
 	ufs_fixup_device_setup(hba, &card);
 	ufshcd_tune_unipro_params(hba);
 
-	ret = ufshcd_set_vccq_rail_unused(hba,
-		(hba->dev_quirks & UFS_DEVICE_NO_VCCQ) ? true : false);
-	if (ret)
-		goto out;
-
 	/* UFS device is also active now */
 	ufshcd_set_ufs_dev_active(hba);
 	ufshcd_force_reset_auto_bkops(hba);
@@ -6030,24 +6024,13 @@  static int ufshcd_config_vreg_load(struct device *dev, struct ufs_vreg *vreg,
 static inline int ufshcd_config_vreg_lpm(struct ufs_hba *hba,
 					 struct ufs_vreg *vreg)
 {
-	if (!vreg)
-		return 0;
-	else if (vreg->unused)
-		return 0;
-	else
-		return ufshcd_config_vreg_load(hba->dev, vreg,
-					       UFS_VREG_LPM_LOAD_UA);
+	return ufshcd_config_vreg_load(hba->dev, vreg, UFS_VREG_LPM_LOAD_UA);
 }
 
 static inline int ufshcd_config_vreg_hpm(struct ufs_hba *hba,
 					 struct ufs_vreg *vreg)
 {
-	if (!vreg)
-		return 0;
-	else if (vreg->unused)
-		return 0;
-	else
-		return ufshcd_config_vreg_load(hba->dev, vreg, vreg->max_uA);
+	return ufshcd_config_vreg_load(hba->dev, vreg, vreg->max_uA);
 }
 
 static int ufshcd_config_vreg(struct device *dev,
@@ -6085,9 +6068,7 @@  static int ufshcd_enable_vreg(struct device *dev, struct ufs_vreg *vreg)
 {
 	int ret = 0;
 
-	if (!vreg)
-		goto out;
-	else if (vreg->enabled || vreg->unused)
+	if (!vreg || vreg->enabled)
 		goto out;
 
 	ret = ufshcd_config_vreg(dev, vreg, true);
@@ -6107,9 +6088,7 @@  static int ufshcd_disable_vreg(struct device *dev, struct ufs_vreg *vreg)
 {
 	int ret = 0;
 
-	if (!vreg)
-		goto out;
-	else if (!vreg->enabled || vreg->unused)
+	if (!vreg || !vreg->enabled)
 		goto out;
 
 	ret = regulator_disable(vreg->reg);
@@ -6215,36 +6194,6 @@  static int ufshcd_init_hba_vreg(struct ufs_hba *hba)
 	return 0;
 }
 
-static int ufshcd_set_vccq_rail_unused(struct ufs_hba *hba, bool unused)
-{
-	int ret = 0;
-	struct ufs_vreg_info *info = &hba->vreg_info;
-
-	if (!info)
-		goto out;
-	else if (!info->vccq)
-		goto out;
-
-	if (unused) {
-		/* shut off the rail here */
-		ret = ufshcd_toggle_vreg(hba->dev, info->vccq, false);
-		/*
-		 * Mark this rail as no longer used, so it doesn't get enabled
-		 * later by mistake
-		 */
-		if (!ret)
-			info->vccq->unused = true;
-	} else {
-		/*
-		 * rail should have been already enabled hence just make sure
-		 * that unused flag is cleared.
-		 */
-		info->vccq->unused = false;
-	}
-out:
-	return ret;
-}
-
 static int __ufshcd_setup_clocks(struct ufs_hba *hba, bool on,
 					bool skip_ref_clk)
 {