On Mon, Feb 15, 2021 at 09:58:08AM +0100, Christian König wrote:
> Hi guys,
>
> we are currently working an Freesync and direct scan out from system memory
> on AMD APUs in A+A laptops.
>
> On problem we stumbled over is that our display hardware needs to scan out
> from uncached system memory an
Le lundi 15 février 2021 à 13:10 +0100, Christian König a écrit :
>
>
> Am 15.02.21 um 13:00 schrieb Thomas Zimmermann:
> > Hi
> >
> > Am 15.02.21 um 10:49 schrieb Thomas Zimmermann:
> > > Hi
> > >
> > > Am 15.02.21 um 09:58 schrieb Christian König:
> > > > Hi guys,
> > > >
> > > > we are curr
Le lundi 15 février 2021 à 09:58 +0100, Christian König a écrit :
> Hi guys,
>
> we are currently working an Freesync and direct scan out from system
> memory on AMD APUs in A+A laptops.
>
> On problem we stumbled over is that our display hardware needs to scan
> out from uncached system memory
From: Christian König
> Sent: 15 February 2021 12:05
...
> Snooping the CPU caches introduces some extra latency, so what can
> happen is that the response to the PCIe read comes to late for the
> scanout. The result is an underflow and flickering whenever something is
> in the cache which needs to
Am 15.02.21 um 13:16 schrieb Lucas Stach:
[SNIP]
Userspace components can then of course tell the exporter what the
importer needs, but validation if that stuff is correct and doesn't
crash the system must happen in the kernel.
What exactly do you mean by "scanout requires non-coherent memory"?
Am Montag, dem 15.02.2021 um 13:04 +0100 schrieb Christian König:
> Am 15.02.21 um 12:53 schrieb Lucas Stach:
> > Am Montag, dem 15.02.2021 um 10:34 +0100 schrieb Christian König:
> > > Am 15.02.21 um 10:06 schrieb Simon Ser:
> > > > On Monday, February 15th, 2021 at 9:58 AM, Christian König
> > >
Am 15.02.21 um 13:00 schrieb Thomas Zimmermann:
Hi
Am 15.02.21 um 10:49 schrieb Thomas Zimmermann:
Hi
Am 15.02.21 um 09:58 schrieb Christian König:
Hi guys,
we are currently working an Freesync and direct scan out from system
memory on AMD APUs in A+A laptops.
On problem we stumbled ov
Am 15.02.21 um 12:53 schrieb Lucas Stach:
Am Montag, dem 15.02.2021 um 10:34 +0100 schrieb Christian König:
Am 15.02.21 um 10:06 schrieb Simon Ser:
On Monday, February 15th, 2021 at 9:58 AM, Christian König
wrote:
we are currently working an Freesync and direct scan out from system
memory o
Hi
Am 15.02.21 um 10:49 schrieb Thomas Zimmermann:
Hi
Am 15.02.21 um 09:58 schrieb Christian König:
Hi guys,
we are currently working an Freesync and direct scan out from system
memory on AMD APUs in A+A laptops.
On problem we stumbled over is that our display hardware needs to scan
out f
Am Montag, dem 15.02.2021 um 10:34 +0100 schrieb Christian König:
>
> Am 15.02.21 um 10:06 schrieb Simon Ser:
> > On Monday, February 15th, 2021 at 9:58 AM, Christian König
> > wrote:
> >
> > > we are currently working an Freesync and direct scan out from system
> > > memory on AMD APUs in A+A
Hi
Am 15.02.21 um 09:58 schrieb Christian König:
Hi guys,
we are currently working an Freesync and direct scan out from system
memory on AMD APUs in A+A laptops.
On problem we stumbled over is that our display hardware needs to scan
out from uncached system memory and we currently don't hav
Am 15.02.21 um 10:06 schrieb Simon Ser:
On Monday, February 15th, 2021 at 9:58 AM, Christian König
wrote:
we are currently working an Freesync and direct scan out from system
memory on AMD APUs in A+A laptops.
On problem we stumbled over is that our display hardware needs to scan
out from
On Monday, February 15th, 2021 at 9:58 AM, Christian König
wrote:
> we are currently working an Freesync and direct scan out from system
> memory on AMD APUs in A+A laptops.
>
> On problem we stumbled over is that our display hardware needs to scan
> out from uncached system memory and we curren
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