On Thu, Jun 20, 2024 at 3:52 PM Hans Verkuil wrote:
>
> On 19/06/2024 06:19, Tomasz Figa wrote:
> > On Wed, Jun 19, 2024 at 1:24 AM Nicolas Dufresne
> > wrote:
> >>
> >> Le mardi 18 juin 2024 à 16:47 +0900, Tomasz Figa a écrit :
> >>> Hi TaoJiang,
> >>>
> >>> On Tue, Jun 18, 2024 at 4:30 PM TaoJ
On 19/06/2024 06:19, Tomasz Figa wrote:
> On Wed, Jun 19, 2024 at 1:24 AM Nicolas Dufresne wrote:
>>
>> Le mardi 18 juin 2024 à 16:47 +0900, Tomasz Figa a écrit :
>>> Hi TaoJiang,
>>>
>>> On Tue, Jun 18, 2024 at 4:30 PM TaoJiang wrote:
From: Ming Qian
When the memory type is
On Wed, Jun 19, 2024 at 1:24 AM Nicolas Dufresne wrote:
>
> Le mardi 18 juin 2024 à 16:47 +0900, Tomasz Figa a écrit :
> > Hi TaoJiang,
> >
> > On Tue, Jun 18, 2024 at 4:30 PM TaoJiang wrote:
> > >
> > > From: Ming Qian
> > >
> > > When the memory type is VB2_MEMORY_DMABUF, the v4l2 device can't
From: Ming Qian
When the memory type is VB2_MEMORY_DMABUF, the v4l2 device can't know
whether the dma buffer is coherent or synchronized.
The videobuf2-core will skip cache syncs as it think the DMA exporter
should take care of cache syncs
But in fact it's likely that the client doesn't
synchro
Hi TaoJiang,
On Tue, Jun 18, 2024 at 4:30 PM TaoJiang wrote:
From: Ming Qian
When the memory type is VB2_MEMORY_DMABUF, the v4l2 device can't know
whether the dma buffer is coherent or synchronized.
The videobuf2-core will skip cache syncs as it think the DMA exporter
should take care o
Le mardi 18 juin 2024 à 16:47 +0900, Tomasz Figa a écrit :
> Hi TaoJiang,
>
> On Tue, Jun 18, 2024 at 4:30 PM TaoJiang wrote:
> >
> > From: Ming Qian
> >
> > When the memory type is VB2_MEMORY_DMABUF, the v4l2 device can't know
> > whether the dma buffer is coherent or synchronized.
> >
> > T
Hi TaoJiang,
On Tue, Jun 18, 2024 at 4:30 PM TaoJiang wrote:
>
> From: Ming Qian
>
> When the memory type is VB2_MEMORY_DMABUF, the v4l2 device can't know
> whether the dma buffer is coherent or synchronized.
>
> The videobuf2-core will skip cache syncs as it think the DMA exporter
> should take
