Re: [PATCH v2 0/3] Add Input Video Control Block driver for RZ/V2H

[Krzysztof Kozlowski <krzk@kernel.org>]

On 24/06/2025 14:35, Daniel Scally wrote:
> Hello all
> 
> This series adds a driver for the Input Video Control Block in the
> RZ/V2H SoC. The IVC block transmits input image data from memory to
> the ISP core (on this SoC, a Mali-C55 ISP). The driver registers an
> output video device for userspace to queue image buffers to. One
> noteworthy feature is that - because it is not a part of the main ISP
> drive - the IVC driver also registers a subdevice, which connects to
> the media device created by the ISP driver through the usual v4l2
> async framework. This requires delaying the registration of the video
> device until the .registered() callback of the subdevice, so that the
> struct v4l2_dev pointer the subdevice connected to can be set to the
> video device.
> 
> To facilitate communication between the ISP driver and the IVC driver
> we use the new media jobs framework that was posted recently [1]. The
> series is also based on top of the latest version of the Mali-C55
> driver [2] and some updates to rzg2l-cru [3].
> 
> Note that this is not quite ready to merge, as there's an outstanding
> bug that sometimes causes the driver to hang. The device should fire
> two interrupts per frame; once on completion of data transmission and
> once on expiration of the blanking period. The second interrupt seems
> sometimes not to arrive, and at the moment the problem is worked
> around with a timeout in rzv2h_ivc_send_next_buffer(). We're working
> on that issue, but because the driver lends helpful context to the
> media jobs and mali-c55 series (and is probably otherwise ready for
> comment too) I wanted to post it.
> 
> Thanks
> Dan
> 
> [1] https://lore.kernel.org/linux-media/20250624-media-jobs-v2-0-8e649b069a96@ideasonboard.com/T/#t
> [2] https://lore.kernel.org/linux-media/20250624-c55-v10-0-54f3d4196990@ideasonboard.com/T/#t
> [3] https://lore.kernel.org/linux-media/20250623-rzg2l-cru-v5-0-1663a8c6719a@ideasonboard.com/T/#t
> 
> ---
> Daniel Scally (3):
>       dt-bindings: media: Add bindings for the RZ/V2H IVC block
>       media: platform: Add Renesas Input Video Control block driver
>       MAINTAINERS: Add entry for rzv2h-ivc driver
> 
>  .../bindings/media/renesas,rzv2h-ivc.yaml          | 103 ++++
>  MAINTAINERS                                        |   7 +
>  drivers/media/platform/renesas/Kconfig             |   2 +
>  drivers/media/platform/renesas/Makefile            |   1 +
>  drivers/media/platform/renesas/rzv2h-ivc/Kconfig   |  15 +
>  drivers/media/platform/renesas/rzv2h-ivc/Makefile  |   5 +
>  .../platform/renesas/rzv2h-ivc/rzv2h-ivc-dev.c     | 237 +++++++
>  .../platform/renesas/rzv2h-ivc/rzv2h-ivc-subdev.c  | 379 ++++++++++++
>  .../platform/renesas/rzv2h-ivc/rzv2h-ivc-video.c   | 678 +++++++++++++++++++++
>  .../media/platform/renesas/rzv2h-ivc/rzv2h-ivc.h   | 133 ++++
>  10 files changed, 1560 insertions(+)
> ---
> base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494
> change-id: 20250624-ivc-833d24376167

That's b4, right? So where is the changelog with lore link to previous
version?

Best regards,
Krzysztof