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From: Asutosh Das <asutoshd@codeaurora.org>
To: Avri.Altman@wdc.com, cang@codeaurora.org,
	martin.petersen@oracle.com, linux-scsi@vger.kernel.org
Cc: Asutosh Das <asutoshd@codeaurora.org>,
	linux-arm-msm@vger.kernel.org,
	Alim Akhtar <alim.akhtar@samsung.com>,
	Avri Altman <avri.altman@wdc.com>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	Stanley Chu <stanley.chu@mediatek.com>,
	Bean Huo <beanhuo@micron.com>,
	Bart Van Assche <bvanassche@acm.org>,
	Venkat Gopalakrishnan <venkatg@codeaurora.org>,
	Tomas Winkler <tomas.winkler@intel.com>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH v2 2/3] scsi: ufshcd: Let vendor override devfreq parameters
Date: Wed, 25 Mar 2020 11:29:01 -0700
Message-ID: <acd79e00396cff855256adad47f615ccdbde85ac.1585160616.git.asutoshd@codeaurora.org> (raw)
In-Reply-To: <cover.1585160616.git.asutoshd@codeaurora.org>
In-Reply-To: <cover.1585160616.git.asutoshd@codeaurora.org>

Vendor drivers may have a need to update the polling interval
and thresholds.
Provide a vops for vendor drivers to use.

Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
---
 drivers/scsi/ufs/ufshcd.c | 15 ++++++++++++++-
 drivers/scsi/ufs/ufshcd.h | 12 ++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 7916c8b..61e8974 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1303,6 +1303,17 @@ static struct devfreq_dev_profile ufs_devfreq_profile = {
 	.get_dev_status	= ufshcd_devfreq_get_dev_status,
 };
 
+#if IS_ENABLED(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND)
+static struct devfreq_simple_ondemand_data ufs_ondemand_data = {
+	.upthreshold = 70,
+	.downdifferential = 5,
+};
+
+static void *gov_data = &ufs_ondemand_data;
+#else
+static void *gov_data = NULL;
+#endif
+
 static int ufshcd_devfreq_init(struct ufs_hba *hba)
 {
 	struct list_head *clk_list = &hba->clk_list_head;
@@ -1318,10 +1329,12 @@ static int ufshcd_devfreq_init(struct ufs_hba *hba)
 	dev_pm_opp_add(hba->dev, clki->min_freq, 0);
 	dev_pm_opp_add(hba->dev, clki->max_freq, 0);
 
+	ufshcd_vops_config_scaling_param(hba, &ufs_devfreq_profile,
+					 gov_data);
 	devfreq = devfreq_add_device(hba->dev,
 			&ufs_devfreq_profile,
 			DEVFREQ_GOV_SIMPLE_ONDEMAND,
-			NULL);
+			gov_data);
 	if (IS_ERR(devfreq)) {
 		ret = PTR_ERR(devfreq);
 		dev_err(hba->dev, "Unable to register with devfreq %d\n", ret);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index d45a044..e8e8ee2 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -56,6 +56,7 @@
 #include <linux/completion.h>
 #include <linux/regulator/consumer.h>
 #include <linux/bitfield.h>
+#include <linux/devfreq.h>
 #include "unipro.h"
 
 #include <asm/irq.h>
@@ -327,6 +328,9 @@ struct ufs_hba_variant_ops {
 	void	(*dbg_register_dump)(struct ufs_hba *hba);
 	int	(*phy_initialization)(struct ufs_hba *);
 	void	(*device_reset)(struct ufs_hba *hba);
+	void	(*config_scaling_param)(struct ufs_hba *hba,
+					struct devfreq_dev_profile *profile,
+					void *data);
 };
 
 /* clock gating state  */
@@ -1083,6 +1087,14 @@ static inline void ufshcd_vops_device_reset(struct ufs_hba *hba)
 	}
 }
 
+static inline void ufshcd_vops_config_scaling_param(struct ufs_hba *hba,
+						    struct devfreq_dev_profile
+						    *profile, void *data)
+{
+	if (hba->vops && hba->vops->config_scaling_param)
+		hba->vops->config_scaling_param(hba, profile, data);
+}
+
 extern struct ufs_pm_lvl_states ufs_pm_lvl_states[];
 
 /*
-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.


  parent reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-25 18:28 [PATCH v2 0/3] UFS Clock Scaling fixes and enhancements Asutosh Das
2020-03-25 18:29 ` [PATCH v2 1/3] scsi: ufshcd: Update the set frequency to devfreq Asutosh Das
2020-05-25 22:19   ` Jeffrey Hugo
2020-05-26 17:17     ` Asutosh Das (asd)
2020-05-28 13:53       ` Jeffrey Hugo
2020-03-25 18:29 ` Asutosh Das [this message]
2020-03-25 18:29 ` [PATCH v2 3/3] scsi: ufs-qcom: Override devfreq parameters Asutosh Das
2020-03-25 23:18 ` [PATCH v2 0/3] UFS Clock Scaling fixes and enhancements Avri Altman
2020-03-27  2:18 ` Martin K. Petersen

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