linux-kernel - Re: [PATCH v2 4/9] media: uapi: Add a control for HANTRO driver

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Message-ID: <2850677.34AhzSeaHW@kista>
Date:   Thu, 18 Feb 2021 22:34:51 +0100
From:   Jernej Škrabec <jernej.skrabec@...l.net>
To:     ezequiel@...labora.com, p.zabel@...gutronix.de, mchehab@...nel.org,
        robh+dt@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        gregkh@...uxfoundation.org, mripard@...nel.org,
        paul.kocialkowski@...tlin.com, wens@...e.org, peng.fan@....com,
        hverkuil-cisco@...all.nl, dan.carpenter@...cle.com,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>
Cc:     linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kernel@...labora.com,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>
Subject: Re: [PATCH v2 4/9] media: uapi: Add a control for HANTRO driver

Hi!

Dne četrtek, 18. februar 2021 ob 20:18:39 CET je Benjamin Gaignard napisal(a):
> The HEVC HANTRO driver needs to know the number of bits to skip at
> the beginning of the slice header.
> That is a hardware specific requirement so create a dedicated control
> that this purpose.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
> ---
>  include/uapi/linux/hantro-v4l2-controls.h | 20 ++++++++++++++++++++
>  include/uapi/linux/v4l2-controls.h        |  5 +++++
>  2 files changed, 25 insertions(+)
>  create mode 100644 include/uapi/linux/hantro-v4l2-controls.h
> 
> diff --git a/include/uapi/linux/hantro-v4l2-controls.h b/include/uapi/linux/
hantro-v4l2-controls.h
> new file mode 100644
> index 000000000000..30b1999b7af3
> --- /dev/null
> +++ b/include/uapi/linux/hantro-v4l2-controls.h
> @@ -0,0 +1,20 @@
> +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> +
> +#ifndef __UAPI_HANTRO_V4L2_CONYTROLS_H__
> +#define __UAPI_HANTRO_V4L2_CONYTROLS_H__
> +
> +#include <linux/v4l2-controls.h>
> +#include <media/hevc-ctrls.h>
> +
> +#define V4L2_CID_HANTRO_HEVC_EXTRA_DECODE_PARAMS	
(V4L2_CID_USER_HANTRO_BASE + 0)
> +
> +/**
> + * struct hantro_hevc_extra_decode_params - extra decode parameters for 
hantro driver
> + * @hevc_hdr_skip_lenght:	header first bits offset
> + */
> +struct hantro_hevc_extra_decode_params {
> +	__u32	hevc_hdr_skip_lenght;

typo: lenght -> length

Same mistake in description above.

Best regards,
Jernej

> +	__u8	padding[4];
> +};
> +
> +#endif
> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-
controls.h
> index 039c0d7add1b..ced7486c7f46 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -209,6 +209,11 @@ enum v4l2_colorfx {
>   * We reserve 128 controls for this driver.
>   */
>  #define V4L2_CID_USER_CCS_BASE			(V4L2_CID_USER_BASE + 
0x10f0)
> +/*
> + * The base for HANTRO driver controls.
> + * We reserve 32 controls for this driver.
> + */
> +#define V4L2_CID_USER_HANTRO_BASE		(V4L2_CID_USER_BASE + 
0x1170)
>  
>  /* MPEG-class control IDs */
>  /* The MPEG controls are applicable to all codec controls
> -- 
> 2.25.1
> 
>