[PATCH v6 xserver 7/7] xf86Cursor: Add hw cursor support for prime

[Alex Goins]

On Thu, 8 Sep 2016, Michel Dänzer wrote:

> On 08/09/16 08:32 AM, Alex Goins wrote:
> > 
> > I'm encountering some very strange issues when running these with PRIME
> > Synchronization enabled, even after fixing our internal cursor handling. When
> > moving the cursor around without damaging anything, it's smooth. When having an
> > application causing damage, and thus flipping, without the cursor moving, it's
> > smooth. When moving the cursor AND causing damage, both the cursor and the
> > flipping seem to be going at roughly 30 Hz, half speed.
> > 
> > Skipping the call to either drmModeMoveCursor() in drmmode_set_cursor_position()
> > or the call to drmModePageFlip() in drmmode_SharedPixmapFlip() alleviates the
> > issue for flipping or cursor moving, respectively, so I'm inclined to say that
> > drmModeMoveCursor() or drmModePageFlip() are interfering with each other. Could
> > that be?
> 
> It certainly could be, but that would probably be an issue in your
> kernel driver.

Sorry, should have specified. This is running against the i915 DRM driver as the
slave. drmModeMoveCursor() and drmModePageFlip() are calling into i915 on kernel
4.6.

Thanks,
Alex