From: Sakari Ailus <sakari.ailus@linux.intel.com>
To: Hugues Fruchet <hugues.fruchet@st.com>
Cc: Steve Longerbeam <slongerbeam@gmail.com>,
Hans Verkuil <hverkuil@xs4all.nl>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
linux-media@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
Benjamin Gaignard <benjamin.gaignard@linaro.org>,
Maxime Ripard <maxime.ripard@bootlin.com>,
Jacopo Mondi <jacopo@jmondi.org>
Subject: Re: [PATCH v2] media: ov5640: add support of V4L2_CID_LINK_FREQ
Date: Thu, 27 Jun 2019 19:05:19 +0300 [thread overview]
Message-ID: <20190627160518.ylc2xfvqdw5w77xc@paasikivi.fi.intel.com> (raw)
In-Reply-To: <1561640224-24062-1-git-send-email-hugues.fruchet@st.com>
Hi Hugues,
On Thu, Jun 27, 2019 at 02:57:04PM +0200, Hugues Fruchet wrote:
> Add support of V4L2_CID_LINK_FREQ, this is needed
> by some CSI-2 receivers.
>
> 384MHz is exposed for the time being, corresponding
> to 96MHz pixel clock with 2 bytes per pixel on 2 data lanes.
>
> This setup has been tested successfully with ST MIPID02
> CSI-2 to parallel bridge.
>
> Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
> ---
Thanks for the patch.
The driver calculates the sensor configuration based on its configuration,
and this needs to be reflected in the link frequency: it's not a static
value. See e.g. ov5640_calc_sys_clk().
> version 2:
> - do not set control read only as per Hans' comment:
> See https://www.mail-archive.com/linux-media@vger.kernel.org/msg147910.html
>
> drivers/media/i2c/ov5640.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
> index 82d4ce9..e6307f3 100644
> --- a/drivers/media/i2c/ov5640.c
> +++ b/drivers/media/i2c/ov5640.c
> @@ -218,6 +218,7 @@ struct ov5640_ctrls {
> struct v4l2_ctrl *test_pattern;
> struct v4l2_ctrl *hflip;
> struct v4l2_ctrl *vflip;
> + struct v4l2_ctrl *link_freq;
> };
>
> struct ov5640_dev {
> @@ -2198,6 +2199,10 @@ static int ov5640_try_fmt_internal(struct v4l2_subdev *sd,
> return 0;
> }
>
> +static const s64 link_freq_menu_items[] = {
> + 384000000,
> +};
> +
> static int ov5640_set_fmt(struct v4l2_subdev *sd,
> struct v4l2_subdev_pad_config *cfg,
> struct v4l2_subdev_format *format)
> @@ -2636,6 +2641,8 @@ static int ov5640_s_ctrl(struct v4l2_ctrl *ctrl)
> case V4L2_CID_VFLIP:
> ret = ov5640_set_ctrl_vflip(sensor, ctrl->val);
> break;
> + case V4L2_CID_LINK_FREQ:
> + return 0;
> default:
> ret = -EINVAL;
> break;
> @@ -2703,6 +2710,9 @@ static int ov5640_init_controls(struct ov5640_dev *sensor)
> V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
> V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
>
> + ctrls->link_freq = v4l2_ctrl_new_int_menu(hdl, ops, V4L2_CID_LINK_FREQ,
> + 0, 0, link_freq_menu_items);
> +
> if (hdl->error) {
> ret = hdl->error;
> goto free_ctrls;
> --
> 2.7.4
>
--
Regards,
Sakari Ailus
sakari.ailus@linux.intel.com
next prev parent reply other threads:[~2019-06-27 16:05 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-27 12:57 [PATCH v2] media: ov5640: add support of V4L2_CID_LINK_FREQ Hugues Fruchet
2019-06-27 16:05 ` Sakari Ailus [this message]
2019-07-02 16:05 ` Hugues FRUCHET
2019-08-20 9:13 ` Sakari Ailus
2019-08-21 14:24 ` Jacopo Mondi
2019-09-03 14:48 ` Hugues FRUCHET
2020-10-19 13:40 ` Hugues FRUCHET
2020-10-21 16:51 ` Jacopo Mondi
2020-10-22 8:14 ` Hugues FRUCHET
2020-10-22 8:32 ` Jacopo Mondi
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