Hi Jacopo, Thank you for the patch. On Tue, Apr 30, 2024 at 12:39:37PM +0200, Jacopo Mondi wrote: > Initialize and use the subdev active state to store the subdevice > format. > > This simplifies the implementation of the get_fmt and set_fmt pad > operations. > > Signed-off-by: Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx> > --- > drivers/media/i2c/adv748x/adv748x-csi2.c | 69 ++++-------------------- > drivers/media/i2c/adv748x/adv748x.h | 1 - > 2 files changed, 11 insertions(+), 59 deletions(-) > > diff --git a/drivers/media/i2c/adv748x/adv748x-csi2.c b/drivers/media/i2c/adv748x/adv748x-csi2.c > index 5b265b722394..435b0909bbef 100644 > --- a/drivers/media/i2c/adv748x/adv748x-csi2.c > +++ b/drivers/media/i2c/adv748x/adv748x-csi2.c > @@ -139,78 +139,26 @@ static const struct v4l2_subdev_video_ops adv748x_csi2_video_ops = { > * But we must support setting the pad formats for format propagation. > */ > > -static struct v4l2_mbus_framefmt * > -adv748x_csi2_get_pad_format(struct v4l2_subdev *sd, > - struct v4l2_subdev_state *sd_state, > - unsigned int pad, u32 which) > -{ > - struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd); > - > - if (which == V4L2_SUBDEV_FORMAT_TRY) > - return v4l2_subdev_state_get_format(sd_state, pad); > - > - return &tx->format; > -} > - > -static int adv748x_csi2_get_format(struct v4l2_subdev *sd, > - struct v4l2_subdev_state *sd_state, > - struct v4l2_subdev_format *sdformat) > -{ > - struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd); > - struct adv748x_state *state = tx->state; > - struct v4l2_mbus_framefmt *mbusformat; > - > - mbusformat = adv748x_csi2_get_pad_format(sd, sd_state, sdformat->pad, > - sdformat->which); > - if (!mbusformat) > - return -EINVAL; > - > - mutex_lock(&state->mutex); > - > - sdformat->format = *mbusformat; > - > - mutex_unlock(&state->mutex); > - > - return 0; > -} > - > static int adv748x_csi2_set_format(struct v4l2_subdev *sd, > struct v4l2_subdev_state *sd_state, > struct v4l2_subdev_format *sdformat) > { > - struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd); > - struct adv748x_state *state = tx->state; > struct v4l2_mbus_framefmt *mbusformat; > - int ret = 0; > - > - mbusformat = adv748x_csi2_get_pad_format(sd, sd_state, sdformat->pad, > - sdformat->which); > - if (!mbusformat) > - return -EINVAL; > > - mutex_lock(&state->mutex); > + mbusformat = v4l2_subdev_state_get_format(sd_state, sdformat->pad); > > + /* Format on the source pad is always copied from the sink one. */ > if (sdformat->pad == ADV748X_CSI2_SOURCE) { > const struct v4l2_mbus_framefmt *sink_fmt; > > - sink_fmt = adv748x_csi2_get_pad_format(sd, sd_state, > - ADV748X_CSI2_SINK, > - sdformat->which); > - > - if (!sink_fmt) { > - ret = -EINVAL; > - goto unlock; > - } > - > + sink_fmt = v4l2_subdev_state_get_format(sd_state, > + ADV748X_CSI2_SINK); > sdformat->format = *sink_fmt; That's not the right way to do it. You should propagate the format from sink to source when pad == ADV748X_CSI2_SINK, and return adv748x_csi2_get_format() when pad == ADV748X_CSI2_SOURCE. Otherwise setting the format on the sink pad will not update the state of the source pad, and a get format call on the source pad will return an incorrect format. > } > > *mbusformat = sdformat->format; > > -unlock: > - mutex_unlock(&state->mutex); > - > - return ret; > + return 0; > } > > static int adv748x_csi2_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad, > @@ -228,7 +176,7 @@ static int adv748x_csi2_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad > } > > static const struct v4l2_subdev_pad_ops adv748x_csi2_pad_ops = { > - .get_fmt = adv748x_csi2_get_format, > + .get_fmt = v4l2_subdev_get_fmt, > .set_fmt = adv748x_csi2_set_format, > .get_mbus_config = adv748x_csi2_get_mbus_config, > }; > @@ -320,6 +268,11 @@ int adv748x_csi2_init(struct adv748x_state *state, struct adv748x_csi2 *tx) > if (ret) > goto err_cleanup_subdev; > > + tx->sd.state_lock = tx->ctrl_hdl.lock; Maybe that's addressed in subsequent patches, but do we need a device-wide lock ? The code you replace above uses the adv748x_state.mutex lock, which covers all subdevs. I don't think this patch introduces race conditions, so this could possibly be handled on top. > + ret = v4l2_subdev_init_finalize(&tx->sd); > + if (ret) > + goto err_free_ctrl; > + > ret = v4l2_async_register_subdev(&tx->sd); > if (ret) > goto err_free_ctrl; > diff --git a/drivers/media/i2c/adv748x/adv748x.h b/drivers/media/i2c/adv748x/adv748x.h > index d2b5e722e997..9bc0121d0eff 100644 > --- a/drivers/media/i2c/adv748x/adv748x.h > +++ b/drivers/media/i2c/adv748x/adv748x.h > @@ -75,7 +75,6 @@ enum adv748x_csi2_pads { > > struct adv748x_csi2 { > struct adv748x_state *state; > - struct v4l2_mbus_framefmt format; > unsigned int page; > unsigned int port; > unsigned int num_lanes; -- Regards, Laurent Pinchart