From ba067c30a6456a28c42f74d2134ce9a54a10337f Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Mon, 6 Dec 2021 16:32:10 +0100 Subject: [PATCH] drm/vc4: hvs: Ignore atomic_flush if we're disabled atomic_flush will be called for each CRTC even if they aren't enabled. The whole code we have there will thus run without a properly affected channel, which can then result in all sorts of weird behaviour. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/vc4/vc4_hvs.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/gpu/drm/vc4/vc4_hvs.c +++ b/drivers/gpu/drm/vc4/vc4_hvs.c @@ -709,6 +709,9 @@ void vc4_hvs_atomic_flush(struct drm_crt u32 __iomem *dlist_start = vc4->hvs->dlist + vc4_state->mm.start; u32 __iomem *dlist_next = dlist_start; + if (vc4_state->assigned_channel == VC4_HVS_CHANNEL_DISABLED) + return; + if (debug_dump_regs) { DRM_INFO("CRTC %d HVS before:\n", drm_crtc_index(crtc)); vc4_hvs_dump_state(dev);