diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0260-drm-vc4-Ignore-HVS-unless-initialised.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0260-drm-vc4-Ignore-HVS-unless-initialised.patch | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0260-drm-vc4-Ignore-HVS-unless-initialised.patch b/target/linux/bcm27xx/patches-5.4/950-0260-drm-vc4-Ignore-HVS-unless-initialised.patch new file mode 100644 index 0000000000..f17f4be37d --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0260-drm-vc4-Ignore-HVS-unless-initialised.patch @@ -0,0 +1,43 @@ +From cad68ea70d649cff90102022c5d161bf84e4ed16 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Fri, 19 Jul 2019 14:29:28 +0100 +Subject: [PATCH] drm/vc4: Ignore HVS unless initialised + +An upstream commit to report HVS underruns causes VC4 in firmware KMS +mode to cross into the HVS side, where it crashes due to a NULL hvs +pointer. + +Make the underrun masking conditional on the hvs pointer being +initialised. + +Fixes: 531a1b622da9 ("drm/vc4: Report HVS underrun errors") + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + drivers/gpu/drm/vc4/vc4_crtc.c | 3 ++- + drivers/gpu/drm/vc4/vc4_kms.c | 2 +- + 2 files changed, 3 insertions(+), 2 deletions(-) + +--- a/drivers/gpu/drm/vc4/vc4_crtc.c ++++ b/drivers/gpu/drm/vc4/vc4_crtc.c +@@ -801,7 +801,8 @@ static void vc4_crtc_handle_page_flip(st + * the CRTC and encoder already reconfigured, leading to + * underruns. This can be seen when reconfiguring the CRTC. + */ +- vc4_hvs_unmask_underrun(dev, vc4_crtc->channel); ++ if (vc4->hvs) ++ vc4_hvs_unmask_underrun(dev, vc4_crtc->channel); + } + spin_unlock_irqrestore(&dev->event_lock, flags); + } +--- a/drivers/gpu/drm/vc4/vc4_kms.c ++++ b/drivers/gpu/drm/vc4/vc4_kms.c +@@ -156,7 +156,7 @@ vc4_atomic_complete_commit(struct drm_at + struct vc4_crtc *vc4_crtc; + int i; + +- for (i = 0; i < dev->mode_config.num_crtc; i++) { ++ for (i = 0; vc4->hvs && i < dev->mode_config.num_crtc; i++) { + if (!state->crtcs[i].ptr || !state->crtcs[i].commit) + continue; + |