On Fri, Mar 29, 2019 at 5:05 AM Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx> wrote:
>
> On Thu, 2019-03-28 at 16:11 +0900, Tomasz Figa wrote:
> > On Tue, Mar 5, 2019 at 4:27 AM Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx> wrote:
[snip]
> > > + * @source_pad: &struct media_pad with the source pad.
> > > + * Used only when the M2M device is registered via
> > > + * v4l2_m2m_unregister_media_controller().
> > > + * @sink: &struct media_entity pointer with the sink entity
> > > + * Used only when the M2M device is registered via
> > > + * v4l2_m2m_unregister_media_controller().
> > > + * @sink_pad: &struct media_pad with the sink pad.
> > > + * Used only when the M2M device is registered via
> > > + * v4l2_m2m_unregister_media_controller().
> > > + * @proc: &struct media_entity pointer with the M2M device itself.
> > > + * @proc_pads: &struct media_pad with the @proc pads.
> > > + * Used only when the M2M device is registered via
> > > + * v4l2_m2m_unregister_media_controller().
> > > + * @intf_devnode: &struct media_intf devnode pointer with the interface
> > > + * with controls the M2M device.
> > > + */
> > > +struct rockchip_vpu_mc {
> > > + struct media_entity *source;
> > > + struct media_pad source_pad;
> > > + struct media_entity sink;
> > > + struct media_pad sink_pad;
> > > + struct media_entity proc;
> > > + struct media_pad proc_pads[2];
> > > + struct media_intf_devnode *intf_devnode;
> > > +};
> > > +
> > > /**
> > > * struct rockchip_vpu_dev - driver data
> > > * @v4l2_dev: V4L2 device to register video devices for.
> > > @@ -78,6 +110,8 @@ enum rockchip_vpu_codec_mode {
> > > * @mdev: media device associated to this device.
> > > * @vfd_enc: Video device for encoder.
> > > * @pdev: Pointer to VPU platform device.
> > > + * @mc: Array of media controller topology structs
> >
> > Is it just me or there is something wrong with indentation here?
> >
>
> It seems to be fine here -- it's all tabs.
Hmm, never mind then.
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int rockchip_register_mc(struct media_device *mdev,
> > > + struct rockchip_vpu_mc *mc,
> > > + struct video_device *vdev,
> > > + int function)
> > > +{
> > > + struct media_link *link;
> > > + int ret;
> > > +
> > > + /* Create the three encoder entities with their pads */
> > > + mc->source = &vdev->entity;
> > > + mc->source_pad.flags = MEDIA_PAD_FL_SOURCE;
> > > + ret = rockchip_vpu_register_entity(mdev, mc->source,
> > > + "source", &mc->source_pad, 1, MEDIA_ENT_F_IO_V4L, vdev);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + mc->proc_pads[0].flags = MEDIA_PAD_FL_SINK;
> > > + mc->proc_pads[1].flags = MEDIA_PAD_FL_SOURCE;
> > > + ret = rockchip_vpu_register_entity(mdev, &mc->proc,
> > > + "proc", mc->proc_pads, 2, function, vdev);
> > > + if (ret)
> > > + goto err_rel_entity0;
> > > +
> > > + mc->sink_pad.flags = MEDIA_PAD_FL_SINK;
> > > + ret = rockchip_vpu_register_entity(mdev, &mc->sink,
> > > + "sink", &mc->sink_pad, 1, MEDIA_ENT_F_IO_V4L, vdev);
> > > + if (ret)
> > > + goto err_rel_entity1;
> > > +
> > > + /* Connect the three entities */
> > > + ret = media_create_pad_link(mc->source, 0, &mc->proc, 1,
> > > + MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
> > > + if (ret)
> > > + goto err_rel_entity2;
> > > +
> > > + ret = media_create_pad_link(&mc->proc, 0, &mc->sink, 0,
> > > + MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
> > > + if (ret)
> > > + goto err_rm_links0;
> > > +
> > > + /* Create video interface */
> > > + mc->intf_devnode = media_devnode_create(mdev,
> > > + MEDIA_INTF_T_V4L_VIDEO, 0,
> > > + VIDEO_MAJOR, vdev->minor);
> > > + if (!mc->intf_devnode) {
> > > + ret = -ENOMEM;
> > > + goto err_rm_links1;
> > > + }
> > > +
> > > + /* Connect the two DMA engines to the interface */
> > > + link = media_create_intf_link(mc->source,
> > > + &mc->intf_devnode->intf,
> > > + MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
> > > + if (!link) {
> > > + ret = -ENOMEM;
> > > + goto err_rm_devnode;
> > > + }
> > > +
> > > + link = media_create_intf_link(&mc->sink,
> > > + &mc->intf_devnode->intf,
> > > + MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
> > > + if (!link) {
> > > + ret = -ENOMEM;
> > > + goto err_rm_intf_link;
> > > + }
> > > + return 0;
> > > +
> > > +err_rm_intf_link:
> > > + media_remove_intf_links(&mc->intf_devnode->intf);
> >
> > Do we need to explicitly remove the links here? The entity removal
> > functions remove the links implicitly.
> >
>
> You mean the media_devnode_remove, right? In that case, seems you are right.
Yep. And also media_device_unregister_entity().
Best regards,
Tomasz
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