Paul Kocialkowski 351af554ed drm: lcdif: Wait for vblank before disabling DMA ... It is necessary to wait for the full frame to finish streaming through the DMA engine before we can safely disable it by removing the DISP_PARA_DISP_ON bit. Disabling it in-flight can leave the hardware confused and unable to resume streaming for the next frame. This causes the FIFO underrun and empty status bits to be set and a single solid color to be shown on the display, coming from one of the pixels of the previous frame. The issue occurs sporadically when a new mode is set, which triggers the crtc disable and enable paths. Setting the shadow load bit and waiting for it to be cleared by the DMA engine allows waiting for completion. The NXP BSP driver addresses this issue with a hardcoded 25 ms sleep. Fixes: 9db35bb349 ("drm: lcdif: Add support for i.MX8MP LCDIF variant") Signed-off-by: Paul Kocialkowski <paulk@sys-base.io> Co-developed-by: Lucas Stach <l.stach@pengutronix.de> Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de> Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de> Acked-by: Liu Ying <victor.liu@nxp.com> Link: https://patch.msgid.link/20260402183351.3281123-3-paulk@sys-base.io Signed-off-by: Lucas Stach <l.stach@pengutronix.de>		2026-05-29 17:18:10 +02:00
..
drm	drm: lcdif: Wait for vblank before disabling DMA	2026-05-29 17:18:10 +02:00
host1x	gpu: host1x: Fix iommu_map_sgtable() return value check	2026-05-28 17:19:30 +02:00
ipu-v3	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	2026-02-21 17:09:51 -08:00
nova-core	drm for v7.1-rc1	2026-04-15 08:45:00 -07:00
tests	gpu/tests/gpu_buddy: Add gpu_test_buddy_alloc_range for exact-range allocation	2026-03-09 13:58:12 +05:30
trace
vga	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	2026-02-21 17:09:51 -08:00
buddy.c	gpu/buddy: Track per-order used blocks with a scoreboard	2026-05-29 13:44:01 +02:00
Kconfig
Makefile	gpu: Fix uninitialized buddy for built-in drivers	2026-02-24 13:40:59 +10:00