Hello :-)
On 2021-07-06 18:08:42 +0200, Jacopo Mondi wrote:
> Hi again,
>
> On Tue, Apr 13, 2021 at 08:02:43PM +0200, Niklas Söderlund wrote:
> > The controls for the video device are created in different code paths
> > depending on if the driver is using the media graph centric model (Gen3)
> > or the device centric model (Gen2 and earlier). This have lead to code
> > duplication that can be consolidated.
> >
> > Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
> > ---
> > drivers/media/platform/rcar-vin/rcar-core.c | 82 +++++++++++----------
> > 1 file changed, 45 insertions(+), 37 deletions(-)
> >
> > diff --git a/drivers/media/platform/rcar-vin/rcar-core.c b/drivers/media/platform/rcar-vin/rcar-core.c
> > index cb3025992817d625..c798dc9409e4cdcd 100644
> > --- a/drivers/media/platform/rcar-vin/rcar-core.c
> > +++ b/drivers/media/platform/rcar-vin/rcar-core.c
> > @@ -405,6 +405,45 @@ static const struct v4l2_ctrl_ops rvin_ctrl_ops = {
> > .s_ctrl = rvin_s_ctrl,
> > };
> >
> > +static void rvin_free_controls(struct rvin_dev *vin)
> > +{
> > + v4l2_ctrl_handler_free(&vin->ctrl_handler);
> > + vin->vdev.ctrl_handler = NULL;
> > +}
> > +
> > +static int rvin_create_controls(struct rvin_dev *vin, struct v4l2_subdev *subdev)
> > +{
> > + int ret;
> > +
> > + ret = v4l2_ctrl_handler_init(&vin->ctrl_handler, 16);
>
> Not a big deal, but 16 because we have to reserve space for the
> eventual subdevice controls ?
Yes, again for Gen2 where the controls of the subdevice are exposed on
the video device. IIRC the number 16 comes from the soc-camera ancestor
for this driver.
>
> > + if (ret < 0)
> > + return ret;
> > +
> > + /* The VIN directly deals with alpha component. */
> > + v4l2_ctrl_new_std(&vin->ctrl_handler, &rvin_ctrl_ops,
> > + V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 255);
> > +
> > + if (vin->ctrl_handler.error) {
> > + ret = vin->ctrl_handler.error;
> > + rvin_free_controls(vin);
> > + return ret;
> > + }
> > +
> > + /* For the non-MC mode add controls from the subdevice. */
> > + if (subdev) {
> > + ret = v4l2_ctrl_add_handler(&vin->ctrl_handler,
> > + subdev->ctrl_handler, NULL, true);
> > + if (ret < 0) {
> > + rvin_free_controls(vin);
> > + return ret;
> > + }
> > + }
> > +
> > + vin->vdev.ctrl_handler = &vin->ctrl_handler;
> > +
> > + return 0;
> > +}
> > +
> > /* -----------------------------------------------------------------------------
> > * Async notifier
> > */
> > @@ -490,28 +529,10 @@ static int rvin_parallel_subdevice_attach(struct rvin_dev *vin,
> > return ret;
> >
> > /* Add the controls */
> > - ret = v4l2_ctrl_handler_init(&vin->ctrl_handler, 16);
> > + ret = rvin_create_controls(vin, subdev);
> > if (ret < 0)
> > return ret;
> >
> > - v4l2_ctrl_new_std(&vin->ctrl_handler, &rvin_ctrl_ops,
> > - V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 255);
> > -
> > - if (vin->ctrl_handler.error) {
> > - ret = vin->ctrl_handler.error;
> > - v4l2_ctrl_handler_free(&vin->ctrl_handler);
> > - return ret;
> > - }
> > -
> > - ret = v4l2_ctrl_add_handler(&vin->ctrl_handler, subdev->ctrl_handler,
> > - NULL, true);
> > - if (ret < 0) {
> > - v4l2_ctrl_handler_free(&vin->ctrl_handler);
> > - return ret;
> > - }
> > -
> > - vin->vdev.ctrl_handler = &vin->ctrl_handler;
> > -
> > vin->parallel.subdev = subdev;
> >
> > return 0;
> > @@ -522,10 +543,8 @@ static void rvin_parallel_subdevice_detach(struct rvin_dev *vin)
> > rvin_v4l2_unregister(vin);
> > vin->parallel.subdev = NULL;
> >
> > - if (!vin->info->use_mc) {
> > - v4l2_ctrl_handler_free(&vin->ctrl_handler);
> > - vin->vdev.ctrl_handler = NULL;
> > - }
> > + if (!vin->info->use_mc)
> > + rvin_free_controls(vin);
> > }
> >
> > static int rvin_parallel_notify_complete(struct v4l2_async_notifier *notifier)
> > @@ -935,21 +954,10 @@ static int rvin_mc_init(struct rvin_dev *vin)
> > if (ret)
> > rvin_group_put(vin);
> >
> > - ret = v4l2_ctrl_handler_init(&vin->ctrl_handler, 1);
> > + ret = rvin_create_controls(vin, NULL);
> > if (ret < 0)
> > return ret;
> >
> > - v4l2_ctrl_new_std(&vin->ctrl_handler, &rvin_ctrl_ops,
> > - V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 255);
> > -
> > - if (vin->ctrl_handler.error) {
> > - ret = vin->ctrl_handler.error;
> > - v4l2_ctrl_handler_free(&vin->ctrl_handler);
> > - return ret;
> > - }
> > -
> > - vin->vdev.ctrl_handler = &vin->ctrl_handler;
> > -
> > return ret;
> > }
> >
> > @@ -1446,7 +1454,7 @@ static int rcar_vin_probe(struct platform_device *pdev)
> > return 0;
> >
> > error_group_unregister:
> > - v4l2_ctrl_handler_free(&vin->ctrl_handler);
> > + rvin_free_controls(vin);
> >
> > if (vin->info->use_mc) {
> > mutex_lock(&vin->group->lock);
> > @@ -1481,7 +1489,7 @@ static int rcar_vin_remove(struct platform_device *pdev)
> > rvin_group_put(vin);
> > }
> >
> > - v4l2_ctrl_handler_free(&vin->ctrl_handler);
> > + rvin_free_controls(vin);
> >
> > rvin_dma_unregister(vin);
> >
> > --
> > 2.31.1
> >
--
Regards,
Niklas Söderlund
