linux-kernel - Re: [PATCH] media: ov5640: Fix set 15fps regression

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Date:   Mon, 28 Jan 2019 13:20:37 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Maxime Ripard <maxime.ripard@...tlin.com>
Cc:     Steve Longerbeam <slongerbeam@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Jacopo Mondi <jacopo+renesas@...ndi.org>,
        linux-media <linux-media@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Michael Trimarchi <michael@...rulasolutions.com>,
        linux-amarula@...rulasolutions.com
Subject: Re: [PATCH] media: ov5640: Fix set 15fps regression

On Fri, Jan 25, 2019 at 9:10 PM Maxime Ripard <maxime.ripard@...tlin.com> wrote:
>
> On Thu, Jan 24, 2019 at 11:28:01PM +0530, Jagan Teki wrote:
> > The ov5640_try_frame_interval operation updates the FPS as per user
> > input based on default ov5640_frame_rate, OV5640_30_FPS which is failed
> > to update when user trigger 15fps.
> >
> > So, initialize the default ov5640_frame_rate to OV5640_15_FPS so-that
> > it can satisfy to update all fps.
> >
> > Fixes: 5a3ad937bc78 ("media: ov5640: Make the return rate type more explicit")
> > Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
>
> I'm pretty sure I tested this and it was working fine. You're
> mentionning a regression, but what regression is there exactly (ie,
> what was working before that commit that doesn't work anymore?). What
> tools/commands are you using to see this behaviour?

In fact I have mentioned this on your v9 [1], may be you missed it.

I have reproduced with media-ctl, below is the full log. let me know
if I still miss anything.

Before this change:
# media-ctl -p
Media controller API version 5.0.0

Media device information
------------------------
driver          sun6i-csi
model           Allwinner Video Capture Device
serial
bus info
hw revision     0x0
driver version  5.0.0

Device topology
- entity 1: sun6i-csi (1 pad, 1 link)
            type Node subtype V4L flags 0
            device node name /dev/video0
        pad0: Sink
                <- "ov5640 1-003c":0 [ENABLED,IMMUTABLE]

- entity 5: ov5640 1-003c (1 pad, 1 link)
            type V4L2 subdev subtype Sensor flags 0
            device node name /dev/v4l-subdev0
        pad0: Source
                [fmt:UYVY8_2X8/640x480@...0 field:none colorspace:srgb
xfer:srgb ycbcr:601 quantization:full-range]
                -> "sun6i-csi":0 [ENABLED,IMMUTABLE]

# media-ctl --set-v4l2 "'ov5640 1-003c':0[fmt:UYVY8_2X8/640x480@...5 field:none]
"
# media-ctl -p
Media controller API version 5.0.0

Media device information
------------------------
driver          sun6i-csi
model           Allwinner Video Capture Device
serial
bus info
hw revision     0x0
driver version  5.0.0

Device topology
- entity 1: sun6i-csi (1 pad, 1 link)
            type Node subtype V4L flags 0
            device node name /dev/video0
        pad0: Sink
                <- "ov5640 1-003c":0 [ENABLED,IMMUTABLE]

- entity 5: ov5640 1-003c (1 pad, 1 link)
            type V4L2 subdev subtype Sensor flags 0
            device node name /dev/v4l-subdev0
        pad0: Source
                [fmt:UYVY8_2X8/640x480@...0 field:none colorspace:srgb
xfer:srgb ycbcr:601 quantization:full-range]
                -> "sun6i-csi":0 [ENABLED,IMMUTABLE]


After this change:
# media-ctl -p
Media controller API version 5.0.0

Media device information
------------------------
driver          sun6i-csi
model           Allwinner Video Capture Device
serial
bus info
hw revision     0x0
driver version  5.0.0

Device topology
- entity 1: sun6i-csi (1 pad, 1 link)
            type Node subtype V4L flags 0
            device node name /dev/video0
        pad0: Sink
                <- "ov5640 1-003c":0 [ENABLED,IMMUTABLE]

- entity 5: ov5640 1-003c (1 pad, 1 link)
            type V4L2 subdev subtype Sensor flags 0
            device node name /dev/v4l-subdev0
        pad0: Source
                [fmt:UYVY8_2X8/640x480@...0 field:none colorspace:srgb
xfer:srgb ycbcr:601 quantization:full-range]
                -> "sun6i-csi":0 [ENABLED,IMMUTABLE]

# media-ctl --set-v4l2 "'ov5640 1-003c':0[fmt:UYVY8_2X8/640x480@...5 field:none]
"
# media-ctl -p
Media controller API version 5.0.0

Media device information
------------------------
driver          sun6i-csi
model           Allwinner Video Capture Device
serial
bus info
hw revision     0x0
driver version  5.0.0

Device topology
- entity 1: sun6i-csi (1 pad, 1 link)
            type Node subtype V4L flags 0
            device node name /dev/video0
        pad0: Sink
                <- "ov5640 1-003c":0 [ENABLED,IMMUTABLE]

- entity 5: ov5640 1-003c (1 pad, 1 link)
            type V4L2 subdev subtype Sensor flags 0
            device node name /dev/v4l-subdev0
        pad0: Source
                [fmt:UYVY8_2X8/640x480@...5 field:none colorspace:srgb
xfer:srgb ycbcr:601 quantization:full-range]
                -> "sun6i-csi":0 [ENABLED,IMMUTABLE]

[1] https://patchwork.kernel.org/patch/10708931/