On Thu, Feb 18, 2021 at 04:21:26PM +0100, Thomas Zimmermann wrote:
> Sure, it's at [1]. For udl, the dmabuf would need to be in system memory.
> The driver creates urbs from the framebuffer content and sends them to the
> device for displaying.
>
> My question is more: what's the best interface t
Hi
Am 18.02.21 um 16:07 schrieb Christoph Hellwig:
On Thu, Feb 18, 2021 at 03:56:00PM +0100, Thomas Zimmermann wrote:
I only have udl devices, but I expect that other DRM USB adapters are also
affected.
Find where the driver calls dma_map_* itself instead of using the USB
wrappers and fix tha
On Thu, Feb 18, 2021 at 03:56:00PM +0100, Thomas Zimmermann wrote:
> I only have udl devices, but I expect that other DRM USB adapters are also
> affected.
Find where the driver calls dma_map_* itself instead of using the USB
wrappers and fix that..
Hi,
commit 6eb0233ec2d0 ("usb: don't inherity DMA properties for USB
devices") creates a regression with the udl driver. udl is a DRM driver
for USB-based DisplayLink adapters.
It's no long possible to join/mirror displays in X. STR and an error log
is shown below.
STR:
* use inter
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