linux-kernel - [PATCH v3 2/5] media: i2c: alvium: remove the fr field of the alvium

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Message-Id: <20231220124023.2801417-3-tomm.merciai@gmail.com>
Date: Wed, 20 Dec 2023 13:40:20 +0100
From: Tommaso Merciai <tomm.merciai@...il.com>
To: 
Cc: linuxfancy@...glegroups.com,
	sakari.ailus@...ux.intel.com,
	laurent.pinchart@...asonboard.com,
	martin.hecht@...et.eu,
	tomm.merciai@...il.com,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 2/5] media: i2c: alvium: remove the fr field of the alvium_dev structure

The fr (frame rate) field of the alvium_dev structure is
only used to pass result from alvium_set_frame_interval() to
alvium_set_frame_rate() that writes this info into the hw reg.
Replace it with a function parameter.

Signed-off-by: Tommaso Merciai <tomm.merciai@...il.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
---
Changes Since v2:
 - Removed req_fr initializzation as suggested by LPinchart
 - Collected tag from LPinchart
 - Fixed commit msg and body as suggested by LPinchart

 drivers/media/i2c/alvium-csi2.c | 24 ++++++++++++------------
 drivers/media/i2c/alvium-csi2.h |  1 -
 2 files changed, 12 insertions(+), 13 deletions(-)

diff --git a/drivers/media/i2c/alvium-csi2.c b/drivers/media/i2c/alvium-csi2.c
index 0dcd69bf9f92..994372030be9 100644
--- a/drivers/media/i2c/alvium-csi2.c
+++ b/drivers/media/i2c/alvium-csi2.c
@@ -1185,19 +1185,19 @@ static int alvium_get_frame_interval(struct alvium_dev *alvium,
 	return ret;
 }
 
-static int alvium_set_frame_rate(struct alvium_dev *alvium)
+static int alvium_set_frame_rate(struct alvium_dev *alvium, u64 fr)
 {
 	struct device *dev = &alvium->i2c_client->dev;
 	int ret;
 
 	ret = alvium_write_hshake(alvium, REG_BCRM_ACQUISITION_FRAME_RATE_RW,
-				  alvium->fr);
+				  fr);
 	if (ret) {
 		dev_err(dev, "Fail to set frame rate lanes reg\n");
 		return ret;
 	}
 
-	dev_dbg(dev, "set frame rate: %llu us\n", alvium->fr);
+	dev_dbg(dev, "set frame rate: %llu us\n", fr);
 
 	return 0;
 }
@@ -1661,10 +1661,11 @@ static int alvium_g_frame_interval(struct v4l2_subdev *sd,
 }
 
 static int alvium_set_frame_interval(struct alvium_dev *alvium,
-				     struct v4l2_subdev_frame_interval *fi)
+				     struct v4l2_subdev_frame_interval *fi,
+				     u64 *req_fr)
 {
 	struct device *dev = &alvium->i2c_client->dev;
-	u64 req_fr, dft_fr, min_fr, max_fr;
+	u64 dft_fr, min_fr, max_fr;
 	int ret;
 
 	if (fi->interval.denominator == 0)
@@ -1681,13 +1682,12 @@ static int alvium_set_frame_interval(struct alvium_dev *alvium,
 	dev_dbg(dev, "fi->interval.denominator = %d\n",
 		fi->interval.denominator);
 
-	req_fr = (u64)((fi->interval.denominator * USEC_PER_SEC) /
+	*req_fr = (u64)((fi->interval.denominator * USEC_PER_SEC) /
 		       fi->interval.numerator);
 
-	if (req_fr >= max_fr && req_fr <= min_fr)
-		req_fr = dft_fr;
+	if (*req_fr >= max_fr && *req_fr <= min_fr)
+		*req_fr = dft_fr;
 
-	alvium->fr = req_fr;
 	alvium->frame_interval.numerator = fi->interval.numerator;
 	alvium->frame_interval.denominator = fi->interval.denominator;
 
@@ -1699,6 +1699,7 @@ static int alvium_s_frame_interval(struct v4l2_subdev *sd,
 				   struct v4l2_subdev_frame_interval *fi)
 {
 	struct alvium_dev *alvium = sd_to_alvium(sd);
+	u64 req_fr;
 	int ret;
 
 	/*
@@ -1711,9 +1712,9 @@ static int alvium_s_frame_interval(struct v4l2_subdev *sd,
 	if (alvium->streaming)
 		return -EBUSY;
 
-	ret = alvium_set_frame_interval(alvium, fi);
+	ret = alvium_set_frame_interval(alvium, fi, &req_fr);
 	if (!ret)
-		ret = alvium_set_frame_rate(alvium);
+		ret = alvium_set_frame_rate(alvium, req_fr);
 
 	return ret;
 }
@@ -2273,7 +2274,6 @@ static int alvium_subdev_init(struct alvium_dev *alvium)
 	/* Setup initial frame interval*/
 	alvium->frame_interval.numerator = 1;
 	alvium->frame_interval.denominator = ALVIUM_DEFAULT_FR_HZ;
-	alvium->fr = ALVIUM_DEFAULT_FR_HZ;
 
 	/* Setup the initial mode */
 	alvium->mode.fmt = alvium_csi2_default_fmt;
diff --git a/drivers/media/i2c/alvium-csi2.h b/drivers/media/i2c/alvium-csi2.h
index 17f0bbbd1839..80066ac25047 100644
--- a/drivers/media/i2c/alvium-csi2.h
+++ b/drivers/media/i2c/alvium-csi2.h
@@ -443,7 +443,6 @@ struct alvium_dev {
 
 	struct alvium_mode mode;
 	struct v4l2_fract frame_interval;
-	u64 fr;
 
 	u8 h_sup_csi_lanes;
 	u64 link_freq;
-- 
2.34.1