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Re: [PATCH v2 7/9] [media] v4l2: introduce v4l2_timeval

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On 09/18/15 12:08, Arnd Bergmann wrote:
> On Friday 18 September 2015 11:52:28 Hans Verkuil wrote:
>> On 09/18/15 11:43, Arnd Bergmann wrote:
>>> On Friday 18 September 2015 11:27:40 Hans Verkuil wrote:
>>>> Ah, OK. Got it.
>>>>
>>>> I think this is dependent on the upcoming media workshop next month. If we
>>>> decide to redesign v4l2_buffer anyway, then we can avoid timeval completely.
>>>> And the only place where we would need to convert it in the compat code
>>>> hidden in the v4l2 core (likely v4l2-ioctl.c).
>>>
>>> Ah, I think I understood the idea now, I missed that earlier when you mention
>>> the idea.
>>>
>>> So what you are saying here is that you could come up with a new unambiguous
>>> (using only __u32 and __u64 types and no pointers) format that gets exposed
>>> to a new set of ioctls, and then change the handling of the existing three
>>> formats (native 64-bit, traditional 32-bit, and 32-bit with 64-bit time_t)
>>> so they get converted into the new format by the common ioctl handling code?
>>
>> Right. Drivers only see the new struct, and only v4l2-ioctl.c (and possible
>> v4l2-compat-ioctl32.c) see the old ones.
>>
>> BTW, I will probably pick up patches 4 and 6 for 4.4. That should help a bit.
> 
> Ok, thanks!
> 
> I guess it's up to Mauro to pick up the first three patches?

Yes.

> As I don't see anything more to do for me here until you've had the
> discussion about the new format, I'll move on to another subsystem now.
> I have around 70 patches waiting to be submitted, plus the system call
> series.

Agreed.

Thanks again for working on this!

Regards,

	Hans
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[PATCH v2 0/9] [media] y2038 conversion for subsystem Arnd Bergmann <arnd@arndb.de> - 2015-09-17 23:30 +0200
  [PATCH v2 2/9] [media] dvb: remove unused systime() function Arnd Bergmann <arnd@arndb.de> - 2015-09-17 23:30 +0200
  [PATCH v2 7/9] [media] v4l2: introduce v4l2_timeval Arnd Bergmann <arnd@arndb.de> - 2015-09-17 23:30 +0200
    Re: [PATCH v2 7/9] [media] v4l2: introduce v4l2_timeval Hans Verkuil <hverkuil@xs4all.nl> - 2015-09-18 10:10 +0200
      Re: [PATCH v2 7/9] [media] v4l2: introduce v4l2_timeval Arnd Bergmann <arnd@arndb.de> - 2015-09-18 11:20 +0200
        Re: [PATCH v2 7/9] [media] v4l2: introduce v4l2_timeval Hans Verkuil <hverkuil@xs4all.nl> - 2015-09-18 11:30 +0200
          Re: [PATCH v2 7/9] [media] v4l2: introduce v4l2_timeval Arnd Bergmann <arnd@arndb.de> - 2015-09-18 11:50 +0200
            Re: [PATCH v2 7/9] [media] v4l2: introduce v4l2_timeval Hans Verkuil <hverkuil@xs4all.nl> - 2015-09-18 12:00 +0200
              Re: [PATCH v2 7/9] [media] v4l2: introduce v4l2_timeval Arnd Bergmann <arnd@arndb.de> - 2015-09-18 12:10 +0200
                Re: [PATCH v2 7/9] [media] v4l2: introduce v4l2_timeval Hans Verkuil <hverkuil@xs4all.nl> - 2015-09-18 12:30 +0200
  [PATCH v2 9/9] [media] omap3isp: support 64-bit version of omap3isp_stat_data Arnd Bergmann <arnd@arndb.de> - 2015-09-17 23:30 +0200
  [PATCH v2 5/9] [media] make VIDIOC_DQEVENT work with 64-bit time_t Arnd Bergmann <arnd@arndb.de> - 2015-09-17 23:30 +0200
  [PATCH v2 8/9] [media] handle 64-bit time_t in v4l2_buffer Arnd Bergmann <arnd@arndb.de> - 2015-09-17 23:30 +0200
    Re: [PATCH v2 8/9] [media] handle 64-bit time_t in v4l2_buffer Hans Verkuil <hverkuil@xs4all.nl> - 2015-09-18 09:30 +0200
      Re: [PATCH v2 8/9] [media] handle 64-bit time_t in v4l2_buffer Arnd Bergmann <arnd@arndb.de> - 2015-09-18 11:30 +0200
        Re: [PATCH v2 8/9] [media] handle 64-bit time_t in v4l2_buffer Hans Verkuil <hverkuil@xs4all.nl> - 2015-09-18 12:00 +0200
          Re: [PATCH v2 8/9] [media] handle 64-bit time_t in v4l2_buffer Arnd Bergmann <arnd@arndb.de> - 2015-09-18 12:20 +0200
  [PATCH v2 3/9] [media] dvb: don't use 'time_t' in event ioctl Arnd Bergmann <arnd@arndb.de> - 2015-09-17 23:30 +0200
  [PATCH v2 6/9] [media] use v4l2_get_timestamp where possible Arnd Bergmann <arnd@arndb.de> - 2015-09-17 23:30 +0200
  [PATCH v2 1/9] [media] dvb: use ktime_t for internal timeout Arnd Bergmann <arnd@arndb.de> - 2015-09-17 23:30 +0200
  [PATCH v2 4/9] [media] exynos4-is: use monotonic timestamps as advertized Arnd Bergmann <arnd@arndb.de> - 2015-09-17 23:30 +0200

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