From 8299d1f057439f94c6a4412e2e5c5082b82a30c9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Sat, 21 Aug 2021 10:54:34 +0200 Subject: bcm27xx: add kernel 5.10 support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 --- ...i-Only-call-into-DRM-framework-if-registe.patch | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 target/linux/bcm27xx/patches-5.10/950-0677-drm-vc4-hdmi-Only-call-into-DRM-framework-if-registe.patch (limited to 'target/linux/bcm27xx/patches-5.10/950-0677-drm-vc4-hdmi-Only-call-into-DRM-framework-if-registe.patch') 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 +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 +--- + 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; -- cgit v1.2.3