linux-kernel - [PATCH v2 2/5] media: imx335: Use v4l2_link_freq_to

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Message-ID: <20240131055208.170934-3-umang.jain@ideasonboard.com>
Date: Wed, 31 Jan 2024 11:22:05 +0530
From: Umang Jain <umang.jain@...asonboard.com>
To: linux-media@...r.kernel.org
Cc: Kieran Bingham <kieran.bingham@...asonboard.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	open list <linux-kernel@...r.kernel.org>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Umang Jain <umang.jain@...asonboard.com>
Subject: [PATCH v2 2/5] media: imx335: Use v4l2_link_freq_to_bitmap helper

Use the v4l2_link_freq_to_bitmap() helper to figure out which
driver-supported link frequencies can be used on a given system.

Signed-off-by: Umang Jain <umang.jain@...asonboard.com>
---
 drivers/media/i2c/imx335.c | 36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/drivers/media/i2c/imx335.c b/drivers/media/i2c/imx335.c
index 927b4806a5d7..73691069556f 100644
--- a/drivers/media/i2c/imx335.c
+++ b/drivers/media/i2c/imx335.c
@@ -49,7 +49,7 @@
 #define IMX335_INCLK_RATE	24000000
 
 /* CSI2 HW configuration */
-#define IMX335_LINK_FREQ	594000000
+#define IMX335_LINK_FREQ	594000000LL
 #define IMX335_NUM_DATA_LANES	4
 
 #define IMX335_REG_MIN		0x00
@@ -134,6 +134,7 @@ struct imx335_mode {
  * @vblank: Vertical blanking in lines
  * @cur_mode: Pointer to current selected sensor mode
  * @mutex: Mutex for serializing sensor controls
+ * @link_freq_bitmap: Menu bitmap for link_freq_ctrl
  * @cur_mbus_code: Currently selected media bus format code
  */
 struct imx335 {
@@ -157,6 +158,7 @@ struct imx335 {
 	u32 vblank;
 	const struct imx335_mode *cur_mode;
 	struct mutex mutex;
+	unsigned long link_freq_bitmap;
 	u32 cur_mbus_code;
 };
 
@@ -404,7 +406,8 @@ static int imx335_update_controls(struct imx335 *imx335,
 {
 	int ret;
 
-	ret = __v4l2_ctrl_s_ctrl(imx335->link_freq_ctrl, mode->link_freq_idx);
+	ret = __v4l2_ctrl_s_ctrl(imx335->link_freq_ctrl,
+				 __ffs(imx335->link_freq_bitmap));
 	if (ret)
 		return ret;
 
@@ -690,6 +693,13 @@ static int imx335_init_state(struct v4l2_subdev *sd,
 	fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
 	imx335_fill_pad_format(imx335, &supported_mode, &fmt);
 
+	mutex_lock(&imx335->mutex);
+	__v4l2_ctrl_modify_range(imx335->link_freq_ctrl, 0,
+				 __fls(imx335->link_freq_bitmap),
+				 ~(imx335->link_freq_bitmap),
+				 __ffs(imx335->link_freq_bitmap));
+	mutex_unlock(&imx335->mutex);
+
 	return imx335_set_pad_format(sd, sd_state, &fmt);
 }
 
@@ -938,19 +948,10 @@ static int imx335_parse_hw_config(struct imx335 *imx335)
 		goto done_endpoint_free;
 	}
 
-	if (!bus_cfg.nr_of_link_frequencies) {
-		dev_err(imx335->dev, "no link frequencies defined\n");
-		ret = -EINVAL;
-		goto done_endpoint_free;
-	}
-
-	for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
-		if (bus_cfg.link_frequencies[i] == IMX335_LINK_FREQ)
-			goto done_endpoint_free;
-
-	dev_err(imx335->dev, "no compatible link frequencies found\n");
-
-	ret = -EINVAL;
+	ret = v4l2_link_freq_to_bitmap(imx335->dev, bus_cfg.link_frequencies,
+				       bus_cfg.nr_of_link_frequencies,
+				       link_freq, ARRAY_SIZE(link_freq),
+				       &imx335->link_freq_bitmap);
 
 done_endpoint_free:
 	v4l2_fwnode_endpoint_free(&bus_cfg);
@@ -1098,9 +1099,8 @@ static int imx335_init_controls(struct imx335 *imx335)
 	imx335->link_freq_ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr,
 							&imx335_ctrl_ops,
 							V4L2_CID_LINK_FREQ,
-							ARRAY_SIZE(link_freq) -
-							1,
-							mode->link_freq_idx,
+							__fls(imx335->link_freq_bitmap),
+							__ffs(imx335->link_freq_bitmap),
 							link_freq);
 	if (imx335->link_freq_ctrl)
 		imx335->link_freq_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
-- 
2.41.0