Re: [PATCH v2 6/9] media: uapi: Add a control for DW100 driver

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Le mardi 08 mars 2022 à 19:48 +0100, Xavier Roumegue a écrit :
> The DW100 driver gets the dewarping mapping as a binary blob from the
> userspace application through a custom control.
> The blob format is hardware specific so create a dedicated control for
> this purpose.
> 
> Signed-off-by: Xavier Roumegue <xavier.roumegue@xxxxxxxxxxx>
> ---
>  Documentation/userspace-api/media/drivers/dw100.rst |  7 +++++++
>  include/uapi/linux/dw100.h                          | 11 +++++++++++
>  2 files changed, 18 insertions(+)
>  create mode 100644 include/uapi/linux/dw100.h
> 
> diff --git a/Documentation/userspace-api/media/drivers/dw100.rst b/Documentation/userspace-api/media/drivers/dw100.rst
> index 20aeae63a94f..3abad05849ad 100644
> --- a/Documentation/userspace-api/media/drivers/dw100.rst
> +++ b/Documentation/userspace-api/media/drivers/dw100.rst
> @@ -20,4 +20,11 @@ match the expected size inherited from the destination image resolution.
>  More details on the DW100 hardware operations can be found in
>  *chapter 13.15 DeWarp* of IMX8MP_ reference manuel.
>  
> +The Vivante DW100 m2m driver implements the following driver-specific control:
> +
> +``V4L2_CID_DW100_MAPPING (integer)``
> +    Specifies to DW100 driver its dewarping map (aka LUT) blob as described in
> +    *chapter 13.15.2.3 Dewarping Remap* of IMX8MP_ reference manual as an U32
> +    dynamic array.
> +
>  .. _IMX8MP: https://www.nxp.com/webapp/Download?colCode=IMX8MPIEC

This point to a document names "i.MX 8M Plus Applications Processor Datasheet
for Industrial Products" which does not contain that reference.

> diff --git a/include/uapi/linux/dw100.h b/include/uapi/linux/dw100.h
> new file mode 100644
> index 000000000000..0ef926c61cf0
> --- /dev/null
> +++ b/include/uapi/linux/dw100.h
> @@ -0,0 +1,11 @@
> +/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
> +/* Copyright 2022 NXP */
> +
> +#ifndef __UAPI_DW100_H__
> +#define __UAPI_DW100_H__
> +
> +#include <linux/v4l2-controls.h>
> +
> +#define V4L2_CID_DW100_MAPPING		(V4L2_CID_USER_DW100_BASE + 1)
> +
> +#endif




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