On Mon, Jan 23, 2023 at 01:52:02PM +0100, Hans de Goede wrote: > Depending on which order userspace makes various v4l2 calls, the sensor > might still be powered down when set_fmt is called. > > What should really happen here is delay the writing of the mode-related > registers till streaming is started, but for now use the same quick fix > as the atomisp_ov2680 / atomisp_gc0310 code and call power_up() from > set_fmt() in combination with keeping track of the power-state to avoid > doing the power-up sequence twice. OK. Reviewed-by: Andy Shevchenko <andy@xxxxxxxxxx> Is there a plan to drop this hack from all of the (AtomISP) sensor drivers? > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> > --- > drivers/staging/media/atomisp/i2c/atomisp-ov2722.c | 12 ++++++++++++ > drivers/staging/media/atomisp/i2c/ov2722.h | 2 +- > 2 files changed, 13 insertions(+), 1 deletion(-) > > diff --git a/drivers/staging/media/atomisp/i2c/atomisp-ov2722.c b/drivers/staging/media/atomisp/i2c/atomisp-ov2722.c > index e09c80d1f9ec..5d2e6e2e72f0 100644 > --- a/drivers/staging/media/atomisp/i2c/atomisp-ov2722.c > +++ b/drivers/staging/media/atomisp/i2c/atomisp-ov2722.c > @@ -528,6 +528,9 @@ static int power_up(struct v4l2_subdev *sd) > return -ENODEV; > } > > + if (dev->power_on == 1) > + return 0; /* Already on */ > + > /* power control */ > ret = power_ctrl(sd, 1); > if (ret) > @@ -552,6 +555,7 @@ static int power_up(struct v4l2_subdev *sd) > /* according to DS, 20ms is needed between PWDN and i2c access */ > msleep(20); > > + dev->power_on = 1; > return 0; > > fail_clk: > @@ -575,6 +579,9 @@ static int power_down(struct v4l2_subdev *sd) > return -ENODEV; > } > > + if (dev->power_on == 0) > + return 0; /* Already off */ > + > ret = dev->platform_data->flisclk_ctrl(sd, 0); > if (ret) > dev_err(&client->dev, "flisclk failed\n"); > @@ -592,6 +599,7 @@ static int power_down(struct v4l2_subdev *sd) > if (ret) > dev_err(&client->dev, "vprog failed.\n"); > > + dev->power_on = 0; > return ret; > } > > @@ -669,6 +677,9 @@ static int ov2722_set_fmt(struct v4l2_subdev *sd, > > mutex_lock(&dev->input_lock); > > + /* s_power has not been called yet for std v4l2 clients (camorama) */ > + power_up(sd); > + > dev->pixels_per_line = dev->res->pixels_per_line; > dev->lines_per_frame = dev->res->lines_per_frame; > > @@ -959,6 +970,7 @@ static int ov2722_probe(struct i2c_client *client) > return -ENOMEM; > > mutex_init(&dev->input_lock); > + dev->power_on = -1; > > dev->res = &ov2722_res_preview[0]; > v4l2_i2c_subdev_init(&dev->sd, client, &ov2722_ops); > diff --git a/drivers/staging/media/atomisp/i2c/ov2722.h b/drivers/staging/media/atomisp/i2c/ov2722.h > index 020743a944c4..640d3ffcaa5c 100644 > --- a/drivers/staging/media/atomisp/i2c/ov2722.h > +++ b/drivers/staging/media/atomisp/i2c/ov2722.h > @@ -198,7 +198,7 @@ struct ov2722_device { > struct ov2722_resolution *res; > > struct camera_sensor_platform_data *platform_data; > - int run_mode; > + int power_on; > u16 pixels_per_line; > u16 lines_per_frame; > u8 type; > -- > 2.39.0 > -- With Best Regards, Andy Shevchenko