[PATCH 14/23] media: i2c: imx258: Issue reset before starting streaming

git
2024-03-27T23:23:25Z

From: Dave Stevenson <dave.stevenson@raspberrypi.com>

Whilst not documented, register 0x0103 bit 0 is the soft
reset for the sensor, so send it before trying to configure
the sensor.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
drivers/media/i2c/imx258.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
index c2c5e819ddc0..a62ed8c26663 100644
--- a/drivers/media/i2c/imx258.c
+++ b/drivers/media/i2c/imx258.c
@@ -20,6 +20,8 @@
#define IMX258_MODE_STANDBY 0x00
#define IMX258_MODE_STREAMING 0x01

+#define IMX258_REG_RESET 0x0103
+
/* Chip ID */
#define IMX258_REG_CHIP_ID 0x0016
#define IMX258_CHIP_ID 0x0258
@@ -1059,6 +1061,16 @@ static int imx258_start_streaming(struct imx258 *imx258)
const struct imx258_link_freq_config *link_freq_cfg;
int ret, link_freq_index;

+ ret = imx258_write_reg(imx258, IMX258_REG_RESET, IMX258_REG_VALUE_08BIT,
+ 0x01);
+ if (ret) {
+ dev_err(&client->dev, "%s failed to reset sensor\n", __func__);
+ return ret;
+ }
+
+ /* 12ms is required from poweron to standby */
+ fsleep(12000);
+
/* Setup PLL */
link_freq_index = imx258->cur_mode->link_freq_index;
link_freq_cfg = &imx258->link_freq_configs[link_freq_index];
--
2.42.0