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Message-Id: <1606442334-22641-1-git-send-email-cang@codeaurora.org>
Date: Thu, 26 Nov 2020 17:58:48 -0800
From: Can Guo <cang@...eaurora.org>
To: asutoshd@...eaurora.org, nguyenb@...eaurora.org,
hongwus@...eaurora.org, rnayak@...eaurora.org,
linux-scsi@...r.kernel.org, kernel-team@...roid.com,
saravanak@...gle.com, salyzyn@...gle.com, cang@...eaurora.org
Cc: Alim Akhtar <alim.akhtar@...sung.com>,
Avri Altman <avri.altman@....com>,
"James E.J. Bottomley" <jejb@...ux.ibm.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Stanley Chu <stanley.chu@...iatek.com>,
Bean Huo <beanhuo@...ron.com>,
Bart Van Assche <bvanassche@....org>,
Satya Tangirala <satyat@...gle.com>,
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 1/1] scsi: ufs: Remove scale down gear hard code
Instead of making the scale down gear a hard code, make it a member of
ufs_clk_scaling struct.
Signed-off-by: Can Guo <cang@...eaurora.org>
---
drivers/scsi/ufs/ufshcd.c | 12 +++++++-----
drivers/scsi/ufs/ufshcd.h | 2 ++
2 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 44254c9..1789df3 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1100,7 +1100,6 @@ static int ufshcd_wait_for_doorbell_clr(struct ufs_hba *hba,
*/
static int ufshcd_scale_gear(struct ufs_hba *hba, bool scale_up)
{
- #define UFS_MIN_GEAR_TO_SCALE_DOWN UFS_HS_G1
int ret = 0;
struct ufs_pa_layer_attr new_pwr_info;
@@ -1111,16 +1110,16 @@ static int ufshcd_scale_gear(struct ufs_hba *hba, bool scale_up)
memcpy(&new_pwr_info, &hba->pwr_info,
sizeof(struct ufs_pa_layer_attr));
- if (hba->pwr_info.gear_tx > UFS_MIN_GEAR_TO_SCALE_DOWN
- || hba->pwr_info.gear_rx > UFS_MIN_GEAR_TO_SCALE_DOWN) {
+ if (hba->pwr_info.gear_tx > hba->clk_scaling.min_gear ||
+ hba->pwr_info.gear_rx > hba->clk_scaling.min_gear) {
/* save the current power mode */
memcpy(&hba->clk_scaling.saved_pwr_info.info,
&hba->pwr_info,
sizeof(struct ufs_pa_layer_attr));
/* scale down gear */
- new_pwr_info.gear_tx = UFS_MIN_GEAR_TO_SCALE_DOWN;
- new_pwr_info.gear_rx = UFS_MIN_GEAR_TO_SCALE_DOWN;
+ new_pwr_info.gear_tx = hba->clk_scaling.min_gear;
+ new_pwr_info.gear_rx = hba->clk_scaling.min_gear;
}
}
@@ -1824,6 +1823,9 @@ static void ufshcd_init_clk_scaling(struct ufs_hba *hba)
if (!ufshcd_is_clkscaling_supported(hba))
return;
+ if (!hba->clk_scaling.min_gear)
+ hba->clk_scaling.min_gear = UFS_HS_G1;
+
INIT_WORK(&hba->clk_scaling.suspend_work,
ufshcd_clk_scaling_suspend_work);
INIT_WORK(&hba->clk_scaling.resume_work,
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 6f0f2d4..bdab23e 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -385,6 +385,7 @@ struct ufs_saved_pwr_info {
* @workq: workqueue to schedule devfreq suspend/resume work
* @suspend_work: worker to suspend devfreq
* @resume_work: worker to resume devfreq
+ * @min_gear: lowest HS gear to scale down to
* @is_allowed: tracks if scaling is currently allowed or not
* @is_busy_started: tracks if busy period has started or not
* @is_suspended: tracks if devfreq is suspended or not
@@ -399,6 +400,7 @@ struct ufs_clk_scaling {
struct workqueue_struct *workq;
struct work_struct suspend_work;
struct work_struct resume_work;
+ u32 min_gear;
bool is_allowed;
bool is_busy_started;
bool is_suspended;
--
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