On 8/8/19 3:35 PM, Niklas Söderlund wrote:
> Hi Laurent,
>
> Thanks for your feedback.
>
> On 2019-08-08 11:37:51 +0300, Laurent Pinchart wrote:
>> Hi Niklas,
>>
>> Thank you for the patch.
>>
>> On Thu, Aug 08, 2019 at 03:18:48AM +0200, Niklas Söderlund wrote:
>>> The crop and compose rectangles are reset when s_fmt is called
>>> resulting in potentially valid rectangles being lost when updating the
>>> format.
>>
>> Isn't this the expected behaviour ?
>
> I though so to at first but I had a nagging feeling as I was not sure.
> So I went and looked at vivid and it does do map the old crop/compose
> rectangles inside the new limits vivid_s_fmt_vid_cap().
>
> Please note that the variable names in this patch are horrible and are
> fixed later in this series. In essence the current crop rectangle is
> mapped inside the size of the video coming from the sensor and the
> compose rectangle is mapped inside the new format set on the VIN video
> device.
The only ioctls that completely reset everything are S_STD and S_DV_TIMINGS.
Ioctls such as S_FMT and S_SELECTION will try to keep as much of the
pre-existing configuration as possible.
So this patch is correct.
Regards,
Hans
>
> I'm open to dropping this patch, I just want this driver to get this
> part right so I mimic vivid.
>
>>
>>> Fix this by mapping the rectangles inside the new format.
>>>
>>> Signed-off-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
>>> Reviewed-by: Kieran Bingham <kieran.bingham+rene...@ideasonboard.com>
>>> ---
>>> drivers/media/platform/rcar-vin/rcar-v4l2.c | 4 ++--
>>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/media/platform/rcar-vin/rcar-v4l2.c
>>> b/drivers/media/platform/rcar-vin/rcar-v4l2.c
>>> index 8b30267f1636aaf1..5dcd787a9cf96ac9 100644
>>> --- a/drivers/media/platform/rcar-vin/rcar-v4l2.c
>>> +++ b/drivers/media/platform/rcar-vin/rcar-v4l2.c
>>> @@ -279,8 +279,8 @@ static int rvin_s_fmt_vid_cap(struct file *file, void
>>> *priv,
>>> return ret;
>>>
>>> vin->format = f->fmt.pix;
>>> - vin->crop = crop;
>>> - vin->compose = compose;
>>> + v4l2_rect_map_inside(&vin->crop, &crop);
>>> + v4l2_rect_map_inside(&vin->compose, &compose);
>>> vin->src_rect = crop;
>>>
>>> return 0;
>>
>> --
>> Regards,
>>
>> Laurent Pinchart
>
