Ok, we have a diagnosis of the real issue, thanks Jason. With that i leave dealing with it to the experts. If some testing or light review of the proper solution is needed on the modesetting-ddx side, happy to do that.
-mario On Tue, Jul 31, 2018 at 6:01 PM, Jason Ekstrand <[email protected]> wrote: > NAK. > > On SNB+, we'd like to get Y-tiling when the surface is only being used by > the compositor and reserve X-tiling for scanout surfaces. With the > modifiers negotiation framework, the X server should be able to figure out > that the window is being composited (or blitted) and request Y-tiling. If > the surface is full-screen, it should know this and either require X-tiling > because that's all KMS advertises or not flip the buffer because it uses a > modifier that's unsupported by the kernel. I think you have an X server > bug. > > --Jason > > On Tue, Jul 31, 2018 at 7:54 AM Mario Kleiner <[email protected]> > wrote: >> >> At least that's what the Linux 4.18 i915 drm/kms driver >> thinks, and the disagreement between kms and Mesa leads to >> pageflipping failure with X-Server 1.20's dmabuf modifiers >> enabled modesetting-ddx, at least as tested on a gen 7 >> Ivybridge system. >> >> Signed-off-by: Mario Kleiner <[email protected]> >> --- >> src/mesa/drivers/dri/i965/intel_screen.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/src/mesa/drivers/dri/i965/intel_screen.c >> b/src/mesa/drivers/dri/i965/intel_screen.c >> index cb35741..ef04ffb 100644 >> --- a/src/mesa/drivers/dri/i965/intel_screen.c >> +++ b/src/mesa/drivers/dri/i965/intel_screen.c >> @@ -309,7 +309,7 @@ static const struct { >> } supported_modifiers[] = { >> { .modifier = DRM_FORMAT_MOD_LINEAR , .since_gen = 1 }, >> { .modifier = I915_FORMAT_MOD_X_TILED , .since_gen = 1 }, >> - { .modifier = I915_FORMAT_MOD_Y_TILED , .since_gen = 6 }, >> + { .modifier = I915_FORMAT_MOD_Y_TILED , .since_gen = 9 }, >> { .modifier = I915_FORMAT_MOD_Y_TILED_CCS , .since_gen = 9 }, >> }; >> >> -- >> 2.7.4 >> >> _______________________________________________ >> mesa-dev mailing list >> [email protected] >> https://lists.freedesktop.org/mailman/listinfo/mesa-dev _______________________________________________ mesa-dev mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/mesa-dev
