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media: ov2740: Add a sleep after resetting the sensor

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Split the resetting of the sensor out of the link_freq_config reg_list
and add a delay after this.

This hopefully fixes the stream sometimes not starting, this was
taken from the ov2740 sensor driver in the out of tree IPU6 driver:

https://github.com/intel/ipu6-drivers/

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Hans de Goede 2023-12-04 13:39:45 +01:00 committed by Hans Verkuil
parent 0677a2d9b7
commit efff0a80bc
1 changed files with 9 additions and 2 deletions
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11
drivers/media/i2c/ov2740.c
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@ -128,7 +128,6 @@ struct ov2740_mode {
};
static const struct ov2740_reg mipi_data_rate_720mbps[] = {
{0x0103, 0x01},
{0x0302, 0x4b},
{0x030d, 0x4b},
{0x030e, 0x02},
@ -137,7 +136,6 @@ static const struct ov2740_reg mipi_data_rate_720mbps[] = {
};
static const struct ov2740_reg mipi_data_rate_360mbps[] = {
{0x0103, 0x01},
{0x0302, 0x4b},
{0x0303, 0x01},
{0x030d, 0x4b},
@ -935,6 +933,15 @@ static int ov2740_start_streaming(struct ov2740 *ov2740)
if (ov2740->nvm)
ov2740_load_otp_data(ov2740->nvm);
/* Reset the sensor */
ret = ov2740_write_reg(ov2740, 0x0103, 1, 0x01);
if (ret) {
dev_err(&client->dev, "failed to reset\n");
return ret;
}
usleep_range(10000, 15000);
link_freq_index = ov2740->cur_mode->link_freq_index;
reg_list = &link_freq_configs[link_freq_index].reg_list;
ret = ov2740_write_reg_list(ov2740, reg_list);