Hi, I have started to look at igt for testing and want to use CRC tests. To implement support for this I need to move away from the simple kms helper. When looking around for examples I came across Thomas' nice shadow helper and thought, yes this is perfect for drm/gud. So I'll switch to that before I move away from the simple kms helper. The async framebuffer flushing code path now uses a shadow buffer and doesn't touch the framebuffer when it shouldn't. I have also taken the opportunity to inline the synchronous flush code path and make this the default flushing stategy. Noralf. Cc: Maxime Ripard <mripard@xxxxxxxxxx> Cc: Thomas Zimmermann <tzimmermann@xxxxxxx> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx Signed-off-by: Noralf Trønnes <noralf@xxxxxxxxxxx> --- Changes in v2: - Drop patch (Thomas): drm/gem: shadow_fb_access: Prepare imported buffers for CPU access - Use src as variable name for iosys_map (Thomas) - Prepare imported buffer for CPU access in the driver (Thomas) - New patch: make sync flushing the default (Thomas) - Link to v1: https://lore.kernel.org/r/20221122-gud-shadow-plane-v1-0-9de3afa3383e@xxxxxxxxxxx --- Noralf Trønnes (6): drm/gud: Fix UBSAN warning drm/gud: Don't retry a failed framebuffer flush drm/gud: Split up gud_flush_work() drm/gud: Prepare buffer for CPU access in gud_flush_work() drm/gud: Use the shadow plane helper drm/gud: Enable synchronous flushing by default drivers/gpu/drm/gud/gud_drv.c | 1 + drivers/gpu/drm/gud/gud_internal.h | 1 + drivers/gpu/drm/gud/gud_pipe.c | 222 ++++++++++++++++++------------------- 3 files changed, 112 insertions(+), 112 deletions(-) --- base-commit: 7257702951305b1f0259c3468c39fc59d1ad4d8b change-id: 20221122-gud-shadow-plane-ae37a95d4d8d Best regards, -- Noralf Trønnes <noralf@xxxxxxxxxxx>
