On Fri, Nov 20, 2020 at 11:25:45AM +0100, Thomas Zimmermann wrote: > Flushing the fbdev's shadow buffer requires vmap'ing the BO memory, which > in turn requires pinning the BO. While being pinned, the BO cannot be moved > into VRAM for scanout. Consequently, a concurrent modeset operation that > involves the fbdev framebuffer would likely fail. > > Resolve this problem be acquiring the modeset lock of the planes that use > the fbdev framebuffer. On non-atomic drivers, also acquire the mode-config > lock. This serializes the flushing of the framebuffer with concurrent > modeset operations. > > v2: > * only acquire struct drm_fb_helper.lock in damage blitter (Daniel, > Christian) > > Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx> _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
