>
> I tried to imagine a negative impact for this hw_ptr_jiffies update when the
> DMA position is not updated from the driver and I haven't found any so far.
>
> Let's apply this and we'll see in future :-)
>
> And yes, the patch description should be improved (DMA ptr is not updated /
> stream
Dne 15. 05. 20 v 12:39 Takashi Iwai napsal(a):
On Fri, 15 May 2020 11:30:54 +0200,
Jaroslav Kysela wrote:
Dne 15. 05. 20 v 11:04 Lu, Brent napsal(a):
Is this a bugfix needed for older kernels as well? When did this issue show
up?
thanks,
greg k-h
It happens when DMA stop moving data from
On Fri, 15 May 2020 11:36:19 +0200,
Lu, Brent wrote:
>
> >
> > Updating hw_ptr_jiffies at that code path looks correct, but it still
> > leaves the
> > question why this condition happens. It means that the actual hwptr isn't
> > changed and yet only jiffies increase significantly; it means tha
On Fri, 15 May 2020 11:30:54 +0200,
Jaroslav Kysela wrote:
>
> Dne 15. 05. 20 v 11:04 Lu, Brent napsal(a):
> >>
> >> Is this a bugfix needed for older kernels as well? When did this issue
> >> show
> >> up?
> >>
> >> thanks,
> >>
> >> greg k-h
> >
> > It happens when DMA stop moving data from ho
Dne 15. 05. 20 v 11:04 Lu, Brent napsal(a):
Is this a bugfix needed for older kernels as well? When did this issue show
up?
thanks,
greg k-h
It happens when DMA stop moving data from host to DSP/DAI for a long time
(> half of buffer time). I know host driver should do something about it. Bu
>
> Updating hw_ptr_jiffies at that code path looks correct, but it still leaves
> the
> question why this condition happens. It means that the actual hwptr isn't
> changed and yet only jiffies increase significantly; it means that the
> hardware
> can't report proper pointer, and it should hav
>
> Is this a bugfix needed for older kernels as well? When did this issue show
> up?
>
> thanks,
>
> greg k-h
It happens when DMA stop moving data from host to DSP/DAI for a long time
(> half of buffer time). I know host driver should do something about it. But if
not, the HWSYNC will keep in
On Fri, 15 May 2020 06:09:39 +0200,
Brent Lu wrote:
>
> The hw_base will be increased by runtime->buffer_size frames
> unconditionally if the runtime->status->hw_ptr is not updated for over
> half of buffer time. As the hw_base increases, so does the
> runtime->status->hw_ptr which could lead to i
On Fri, May 15, 2020 at 12:09:39PM +0800, Brent Lu wrote:
> The hw_base will be increased by runtime->buffer_size frames
> unconditionally if the runtime->status->hw_ptr is not updated for over
> half of buffer time. As the hw_base increases, so does the
> runtime->status->hw_ptr which could lead t
The hw_base will be increased by runtime->buffer_size frames
unconditionally if the runtime->status->hw_ptr is not updated for over
half of buffer time. As the hw_base increases, so does the
runtime->status->hw_ptr which could lead to invalid return value when
user space program calls snd_pcm_avail
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