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From:   Fabio Estevam <festevam@gmail.com>
Date:   Fri, 28 Feb 2020 14:31:08 -0300
Message-ID: <CAOMZO5AP65Upj8v=KaPLzS10DNdwrz20gJGbwbcJfCDqZBx71Q@mail.gmail.com>
Subject: Re: [PATCH] media: i2c: ov5645: Add virtual_channel module parameter
To:     Lad Prabhakar <prabhakar.csengg@gmail.com>
Cc:     Mauro Carvalho Chehab <mchehab@kernel.org>,
        Sakari Ailus <sakari.ailus@linux.intel.com>,
        linux-media <linux-media@vger.kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
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Hi Lad,

On Fri, Feb 28, 2020 at 1:41 PM Lad Prabhakar
<prabhakar.csengg@gmail.com> wrote:
>
> OV5645 can operate in virtual channel 0-3 in CSI2 interfaces, this patch
> adds support for module parameter virtual_channel to select the required
> channel. By default OV5645 operates in virtual channel 0.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
>  drivers/media/i2c/ov5645.c | 28 ++++++++++++++++++++++++++++
>  1 file changed, 28 insertions(+)
>
> diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c
> index a6c17d15d754..0a0671164623 100644
> --- a/drivers/media/i2c/ov5645.c
> +++ b/drivers/media/i2c/ov5645.c
> @@ -54,6 +54,7 @@
>  #define OV5645_TIMING_TC_REG21         0x3821
>  #define                OV5645_SENSOR_MIRROR            BIT(1)
>  #define OV5645_MIPI_CTRL00             0x4800
> +#define OV5645_REG_DEBUG_MODE          0x4814
>  #define OV5645_PRE_ISP_TEST_SETTING_1  0x503d
>  #define                OV5645_TEST_PATTERN_MASK        0x3
>  #define                OV5645_SET_TEST_PATTERN(x)      ((x) & OV5645_TEST_PATTERN_MASK)
> @@ -61,6 +62,11 @@
>  #define OV5645_SDE_SAT_U               0x5583
>  #define OV5645_SDE_SAT_V               0x5584
>
> +static u8 virtual_channel;
> +module_param(virtual_channel, byte, 0644);
> +MODULE_PARM_DESC(virtual_channel,
> +                "MIPI CSI-2 virtual channel (0..3), default 0");

Should this be a device tree property instead?