linux-kernel - Re: [PATCH v2 1/4] media/v4l2-core: Add enum V4L2_FWNODE_BUS_TYPE

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Date:   Fri, 22 Apr 2022 16:10:03 +0200
From:   Robert Foss <robert.foss@...aro.org>
To:     Xin Ji <xji@...logixsemi.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        bliang@...logixsemi.com, qwen@...logixsemi.com,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] media/v4l2-core: Add enum V4L2_FWNODE_BUS_TYPE_DPI

On Fri, 22 Apr 2022 at 10:48, Xin Ji <xji@...logixsemi.com> wrote:
>
> As V4L2_FWNODE_BUS_TYPE_PARALLEL is not used for DPI interface, this
> patch add V4L2_FWNODE_BUS_TYPE_DPI for video DPI interface.
>
> Signed-off-by: Xin Ji <xji@...logixsemi.com>
> ---
>  drivers/media/v4l2-core/v4l2-fwnode.c | 4 ++++
>  include/media/v4l2-fwnode.h           | 2 ++
>  include/media/v4l2-mediabus.h         | 2 ++
>  3 files changed, 8 insertions(+)
>
> diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c
> index afceb35e500c..3d85a8600f57 100644
> --- a/drivers/media/v4l2-core/v4l2-fwnode.c
> +++ b/drivers/media/v4l2-core/v4l2-fwnode.c
> @@ -61,6 +61,10 @@ static const struct v4l2_fwnode_bus_conv {
>                 V4L2_FWNODE_BUS_TYPE_BT656,
>                 V4L2_MBUS_BT656,
>                 "Bt.656",
> +       }, {
> +               V4L2_FWNODE_BUS_TYPE_DPI,
> +               V4L2_MBUS_DPI,
> +               "DPI",
>         }
>  };
>
> diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h
> index feb132df45a3..15e4ab672223 100644
> --- a/include/media/v4l2-fwnode.h
> +++ b/include/media/v4l2-fwnode.h
> @@ -173,6 +173,7 @@ struct v4l2_fwnode_connector {
>   * @V4L2_FWNODE_BUS_TYPE_CSI2_DPHY: MIPI CSI-2 bus, D-PHY physical layer
>   * @V4L2_FWNODE_BUS_TYPE_PARALLEL: Camera Parallel Interface bus
>   * @V4L2_FWNODE_BUS_TYPE_BT656: BT.656 video format bus-type
> + * @V4L2_FWNODE_BUS_TYPE_DPI: Video Parallel Interface bus
>   * @NR_OF_V4L2_FWNODE_BUS_TYPE: Number of bus-types
>   */
>  enum v4l2_fwnode_bus_type {
> @@ -183,6 +184,7 @@ enum v4l2_fwnode_bus_type {
>         V4L2_FWNODE_BUS_TYPE_CSI2_DPHY,
>         V4L2_FWNODE_BUS_TYPE_PARALLEL,
>         V4L2_FWNODE_BUS_TYPE_BT656,
> +       V4L2_FWNODE_BUS_TYPE_DPI,
>         NR_OF_V4L2_FWNODE_BUS_TYPE
>  };
>
> diff --git a/include/media/v4l2-mediabus.h b/include/media/v4l2-mediabus.h
> index e0db3bcff9ed..f67a74daf799 100644
> --- a/include/media/v4l2-mediabus.h
> +++ b/include/media/v4l2-mediabus.h
> @@ -129,6 +129,7 @@ struct v4l2_mbus_config_mipi_csi1 {
>   * @V4L2_MBUS_CCP2:    CCP2 (Compact Camera Port 2)
>   * @V4L2_MBUS_CSI2_DPHY: MIPI CSI-2 serial interface, with D-PHY
>   * @V4L2_MBUS_CSI2_CPHY: MIPI CSI-2 serial interface, with C-PHY
> + * @V4L2_MBUS_DPI:      MIPI VIDEO DPI interface
>   * @V4L2_MBUS_INVALID: invalid bus type (keep as last)
>   */
>  enum v4l2_mbus_type {
> @@ -139,6 +140,7 @@ enum v4l2_mbus_type {
>         V4L2_MBUS_CCP2,
>         V4L2_MBUS_CSI2_DPHY,
>         V4L2_MBUS_CSI2_CPHY,
> +       V4L2_MBUS_DPI,
>         V4L2_MBUS_INVALID,
>  };
>

I'm not seeing any issues with this patch (or the rest of the series),
so I'll add my r-b. But I would like to see another review by someone
more familiar with the media subsystem.

Reviewed-by: Robert Foss <robert.foss@...aro.org>