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Subject: media: imx335: Support 2 or 4 lane operation modes
Author: Kieran Bingham <kieran.bing...@ideasonboard.com>
Date: Sun Apr 14 19:36:16 2024 +0530
The IMX335 can support both 2 and 4 lane configurations.
Extend the driver to configure the lane mode accordingly.
Update the pixel rate depending on the number of lanes in use.
Signed-off-by: Kieran Bingham <kieran.bing...@ideasonboard.com>
Signed-off-by: Umang Jain <umang.j...@ideasonboard.com>
Reviewed-by: Tommaso Merciai <tomm.merc...@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
[hverkuil: fixup missing : in @lane_mode kerneldoc line]
drivers/media/i2c/imx335.c | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
---
diff --git a/drivers/media/i2c/imx335.c b/drivers/media/i2c/imx335.c
index dab6d080bc4c..fbf6bf662028 100644
--- a/drivers/media/i2c/imx335.c
+++ b/drivers/media/i2c/imx335.c
@@ -21,6 +21,11 @@
#define IMX335_MODE_STANDBY 0x01
#define IMX335_MODE_STREAMING 0x00
+/* Data Lanes */
+#define IMX335_LANEMODE 0x3a01
+#define IMX335_2LANE 1
+#define IMX335_4LANE 3
+
/* Lines per frame */
#define IMX335_REG_LPFR 0x3030
@@ -147,6 +152,7 @@ struct imx335_mode {
* @exp_ctrl: Pointer to exposure control
* @again_ctrl: Pointer to analog gain control
* @vblank: Vertical blanking in lines
+ * @lane_mode: Mode for number of connected data lanes
* @cur_mode: Pointer to current selected sensor mode
* @mutex: Mutex for serializing sensor controls
* @link_freq_bitmap: Menu bitmap for link_freq_ctrl
@@ -171,6 +177,7 @@ struct imx335 {
struct v4l2_ctrl *again_ctrl;
};
u32 vblank;
+ u32 lane_mode;
const struct imx335_mode *cur_mode;
struct mutex mutex;
unsigned long link_freq_bitmap;
@@ -936,6 +943,11 @@ static int imx335_start_streaming(struct imx335 *imx335)
return ret;
}
+ /* Configure lanes */
+ ret = imx335_write_reg(imx335, IMX335_LANEMODE, 1, imx335->lane_mode);
+ if (ret)
+ return ret;
+
/* Setup handler will write actual exposure and gain */
ret = __v4l2_ctrl_handler_setup(imx335->sd.ctrl_handler);
if (ret) {
@@ -1096,7 +1108,14 @@ static int imx335_parse_hw_config(struct imx335 *imx335)
if (ret)
return ret;
- if (bus_cfg.bus.mipi_csi2.num_data_lanes != IMX335_NUM_DATA_LANES) {
+ switch (bus_cfg.bus.mipi_csi2.num_data_lanes) {
+ case 2:
+ imx335->lane_mode = IMX335_2LANE;
+ break;
+ case 4:
+ imx335->lane_mode = IMX335_4LANE;
+ break;
+ default:
dev_err(imx335->dev,
"number of CSI2 data lanes %d is not supported\n",
bus_cfg.bus.mipi_csi2.num_data_lanes);
