diff options
author | Álvaro Fernández Rojas <noltari@gmail.com> | 2021-08-21 10:54:34 +0200 |
---|---|---|
committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2021-08-21 19:07:07 +0200 |
commit | 8299d1f057439f94c6a4412e2e5c5082b82a30c9 (patch) | |
tree | 1bf678d61f11f7394493be464c7876e496f7faed /target/linux/bcm27xx/patches-5.10/950-0677-drm-vc4-hdmi-Only-call-into-DRM-framework-if-registe.patch | |
parent | 33b6885975ce376ff075362b7f0890326043111b (diff) | |
download | upstream-8299d1f057439f94c6a4412e2e5c5082b82a30c9.tar.gz upstream-8299d1f057439f94c6a4412e2e5c5082b82a30c9.tar.bz2 upstream-8299d1f057439f94c6a4412e2e5c5082b82a30c9.zip |
bcm27xx: add kernel 5.10 support
Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted
patches, wireless patches and defconfig patches.
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 4B v1.1 4G
bcm2711: boot tested on RPi 4B v1.1 4G
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/bcm27xx/patches-5.10/950-0677-drm-vc4-hdmi-Only-call-into-DRM-framework-if-registe.patch')
-rw-r--r-- | target/linux/bcm27xx/patches-5.10/950-0677-drm-vc4-hdmi-Only-call-into-DRM-framework-if-registe.patch | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.10/950-0677-drm-vc4-hdmi-Only-call-into-DRM-framework-if-registe.patch b/target/linux/bcm27xx/patches-5.10/950-0677-drm-vc4-hdmi-Only-call-into-DRM-framework-if-registe.patch new file mode 100644 index 0000000000..bac5466509 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.10/950-0677-drm-vc4-hdmi-Only-call-into-DRM-framework-if-registe.patch @@ -0,0 +1,35 @@ +From a4ea60641c2e5ac11d3472e723b33b36f16e6bcb Mon Sep 17 00:00:00 2001 +From: Maxime Ripard <maxime@cerno.tech> +Date: Mon, 5 Jul 2021 16:15:56 +0200 +Subject: [PATCH] drm/vc4: hdmi: Only call into DRM framework if + registered + +Our hotplug handler will currently call the drm_kms_helper_hotplug_event +every time a hotplug interrupt is called. + +However, since the device is registered after all the drivers have +finished their bind callback, we have a window between when we install +our interrupt handler and when drm_dev_register() is eventually called +where our handler can run and call drm_kms_helper_hotplug_event but the +device hasn't been registered yet, causing a null pointer dereference. + +Fix this by making sure we only call drm_kms_helper_hotplug_event if our +device has been properly registered. + +Fixes: f4790083c7c2 ("drm/vc4: hdmi: Rely on interrupts to handle hotplug") +Signed-off-by: Maxime Ripard <maxime@cerno.tech> +--- + drivers/gpu/drm/vc4/vc4_hdmi.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/gpu/drm/vc4/vc4_hdmi.c ++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c +@@ -1602,7 +1602,7 @@ static irqreturn_t vc4_hdmi_hpd_irq_thre + struct vc4_hdmi *vc4_hdmi = priv; + struct drm_device *dev = vc4_hdmi->connector.dev; + +- if (dev) ++ if (dev && dev->registered) + drm_kms_helper_hotplug_event(dev); + + return IRQ_HANDLED; |