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44 lines
1.4 KiB
Diff
44 lines
1.4 KiB
Diff
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From cad68ea70d649cff90102022c5d161bf84e4ed16 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Fri, 19 Jul 2019 14:29:28 +0100
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Subject: [PATCH] drm/vc4: Ignore HVS unless initialised
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An upstream commit to report HVS underruns causes VC4 in firmware KMS
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mode to cross into the HVS side, where it crashes due to a NULL hvs
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pointer.
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Make the underrun masking conditional on the hvs pointer being
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initialised.
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Fixes: 531a1b622da9 ("drm/vc4: Report HVS underrun errors")
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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drivers/gpu/drm/vc4/vc4_crtc.c | 3 ++-
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drivers/gpu/drm/vc4/vc4_kms.c | 2 +-
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2 files changed, 3 insertions(+), 2 deletions(-)
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--- a/drivers/gpu/drm/vc4/vc4_crtc.c
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+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
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@@ -801,7 +801,8 @@ static void vc4_crtc_handle_page_flip(st
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* the CRTC and encoder already reconfigured, leading to
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* underruns. This can be seen when reconfiguring the CRTC.
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*/
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- vc4_hvs_unmask_underrun(dev, vc4_crtc->channel);
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+ if (vc4->hvs)
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+ vc4_hvs_unmask_underrun(dev, vc4_crtc->channel);
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}
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spin_unlock_irqrestore(&dev->event_lock, flags);
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}
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--- a/drivers/gpu/drm/vc4/vc4_kms.c
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+++ b/drivers/gpu/drm/vc4/vc4_kms.c
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@@ -156,7 +156,7 @@ vc4_atomic_complete_commit(struct drm_at
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struct vc4_crtc *vc4_crtc;
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int i;
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- for (i = 0; i < dev->mode_config.num_crtc; i++) {
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+ for (i = 0; vc4->hvs && i < dev->mode_config.num_crtc; i++) {
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if (!state->crtcs[i].ptr || !state->crtcs[i].commit)
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continue;
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