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28 lines
985 B
Diff
28 lines
985 B
Diff
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From ba067c30a6456a28c42f74d2134ce9a54a10337f Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime@cerno.tech>
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Date: Mon, 6 Dec 2021 16:32:10 +0100
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Subject: [PATCH] drm/vc4: hvs: Ignore atomic_flush if we're disabled
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atomic_flush will be called for each CRTC even if they aren't enabled.
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The whole code we have there will thus run without a properly affected
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channel, which can then result in all sorts of weird behaviour.
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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---
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drivers/gpu/drm/vc4/vc4_hvs.c | 3 +++
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1 file changed, 3 insertions(+)
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--- a/drivers/gpu/drm/vc4/vc4_hvs.c
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+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
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@@ -686,6 +686,9 @@ void vc4_hvs_atomic_flush(struct drm_crt
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u32 __iomem *dlist_start = vc4->hvs->dlist + vc4_state->mm.start;
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u32 __iomem *dlist_next = dlist_start;
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+ if (vc4_state->assigned_channel == VC4_HVS_CHANNEL_DISABLED)
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+ return;
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+
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if (debug_dump_regs) {
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DRM_INFO("CRTC %d HVS before:\n", drm_crtc_index(crtc));
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vc4_hvs_dump_state(dev);
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