linux-kernel - Re: [PATCH] media: imx214: Fix stop streaming

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Date:   Thu, 3 Oct 2019 21:59:59 +0200
From:   Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
To:     Daniel Gomez <daniel@...c.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media <linux-media@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] media: imx214: Fix stop streaming

Ups.... sorry about that. Hopefully it works fine also without the
patch, but it needs to be fixed.

On Thu, Oct 3, 2019 at 4:46 PM Daniel Gomez <daniel@...c.com> wrote:
>
> Stop video streaming when requested.
>
> When s_stream is called to stop the video streaming, if/else condition calls
> start_streaming function instead of the one for stopping it.
>
> Fixes: 436190596241 ("media: imx214: Add imx214 camera sensor driver")
> Signed-off-by: Daniel Gomez <daniel@...c.com>

Signed-off-by: Ricardo Ribalda <ribalda@...nel.org>
> ---
>
> You can find some logs before/after running in the hardware. Notice 0x100
> register is for starting/stopping the video streaming from the imx214 sensor.
>
> * Before patch:
>
> # media-ctl -d /dev/media0 -l '"msm_csiphy0":1->"msm_csid0":0[1],"msm_csid0":1->"msm_ispif0":0[1],"msm_ispif0":1->"msm_vfe0_rdi0":0[1]'
> # media-ctl -d /dev/media0 -V '"imx214 3-001a":0[fmt:SRGGB10/1920x1080],"msm_csiphy0":0[fmt:SRGGB10/1920x1080],"msm_csid0":0[fmt:SRGGB10/1920x1080],"msm_ispif0":0[fmt:SRGGB10/1920x1080],"msm_vfe0_rdi0":0[fmt:SRGGB10/1920x1080]'
> # yavta -f SRGGB10P -s 1920x1080 -n 1 --capture=5 /dev/v4l/by-path/platform-a34000.camss-video-index0
> Device /dev/v4l/by-path/platform-a34000.camss-video-index0 opened.
> Device `Qualcomm Camera Subsystem' on `platform:a34000.camss' (driver 'qcom-camss') supports video, capture, with mplanes.
> Video format set: SRGGB10P (41415270) 1920x1080 field none, 1 planes:
>  * Stride 2400, buffer size 2592000
> Video format: SRGGB10P (41415270) 1920x1080 field none, 1 planes:
>  * Stride 2400, buffer size 2592000
> 1 buffers requested.
> length: 1 offset: 4093609832 timestamp type/source: mono/EoF
> Buffer 0/0 mapped at address 0xffff84b6b000.
> 0 (0) [-] none 0 2592000 B 30.682759 30.705111 4.697 fps ts mono/EoF
> 1 (0) [-] none 1 2592000 B 30.749391 30.771609 15.008 fps ts mono/EoF
> 2 (0) [-] none 2 2592000 B 30.816042 30.838225 15.004 fps ts mono/EoF
> 3 (0) [-] none 3 2592000 B 30.882690 30.904992 15.004 fps ts mono/EoF
> 4 (0) [-] none 4 2592000 B 30.949333 30.971543 15.005 fps ts mono/EoF
> Captured 5 frames in 0.501681 seconds (9.966480 fps, 0.000000 B/s).
> 1 buffers released.
> # v4l2-dbg -d /dev/v4l-subdev19 -g 0x100
> ioctl: VIDIOC_DBG_G_REGISTER
> Register 0x00000100 = 1h (1d  00000001b)
>
> * After patch:
>
> # media-ctl -d /dev/media0 -l '"msm_csiphy0":1->"msm_csid0":0[1],"msm_csid0":1->"msm_ispif0":0[1],"msm_ispif0":1->"msm_vfe0_rdi0":0[1]'
> # media-ctl -d /dev/media0 -V '"imx214 3-001a":0[fmt:SRGGB10/1920x1080],"msm_csiphy0":0[fmt:SRGGB10/1920x1080],"msm_csid0":0[fmt:SRGGB10/1920x1080],"msm_ispif0":0[fmt:SRGGB10/1920x1080],"msm_vfe0_rdi0":0[fmt:SRGGB10/1920x1080]'
> # yavta -f SRGGB10P -s 1920x1080 -n 1 --capture=5 /dev/v4l/by-path/platform-a34000.camss-video-index0
> Device /dev/v4l/by-path/platform-a34000.camss-video-index0 opened.
> Device `Qualcomm Camera Subsystem' on `platform:a34000.camss' (driver 'qcom-camss') supports video, capture, with mplanes.
> Video format set: SRGGB10P (41415270) 1920x1080 field none, 1 planes:
>  * Stride 2400, buffer size 2592000
> Video format: SRGGB10P (41415270) 1920x1080 field none, 1 planes:
>  * Stride 2400, buffer size 2592000
> 1 buffers requested.
> length: 1 offset: 3764913896 timestamp type/source: mono/EoF
> Buffer 0/0 mapped at address 0xffffb62f7000.
> 0 (0) [-] none 0 2592000 B 31.283473 31.306390 4.697 fps ts mono/EoF
> 1 (0) [-] none 1 2592000 B 31.350115 31.372475 15.006 fps ts mono/EoF
> 2 (0) [-] none 2 2592000 B 31.416765 31.439728 15.004 fps ts mono/EoF
> 3 (0) [-] none 3 2592000 B 31.483410 31.505791 15.005 fps ts mono/EoF
> 4 (0) [-] none 4 2592000 B 31.550058 31.573025 15.004 fps ts mono/EoF
> Captured 5 frames in 0.502440 seconds (9.951430 fps, 0.000000 B/s).
> 1 buffers released.
> # v4l2-dbg -d /dev/v4l-subdev19 -g 0x100
> ioctl: VIDIOC_DBG_G_REGISTER
> Register 0x00000100 = 0h (0d  00000000b)
>
>  drivers/media/i2c/imx214.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/media/i2c/imx214.c b/drivers/media/i2c/imx214.c
> index 159a3a604f0e..24659cb0d083 100644
> --- a/drivers/media/i2c/imx214.c
> +++ b/drivers/media/i2c/imx214.c
> @@ -785,7 +785,7 @@ static int imx214_s_stream(struct v4l2_subdev *subdev, int enable)
>                 if (ret < 0)
>                         goto err_rpm_put;
>         } else {
> -               ret = imx214_start_streaming(imx214);
> +               ret = imx214_stop_streaming(imx214);
>                 if (ret < 0)
>                         goto err_rpm_put;
>                 pm_runtime_put(imx214->dev);
> --
> 2.20.1
>


-- 
Ricardo Ribalda