pipewire: fix timerfd deadlock issue

Bug-AGL: SPEC-3957

Signed-off-by: George Kiagiadakis <george.kiagiadakis@collabora.com>
[manual cherry-pick of 6da4a449 from lamprey]
Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: Iea0b75416c679009a089e6dee36fba03be8e601a
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/26572
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
ci-image-boot-test: Jenkins Job builder account
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>

3 files changed, 88 insertions, 0 deletions

diff --git a/meta-pipewire/recipes-multimedia/pipewire/pipewire/0001-null-sink-make-the-timerfd-non-blocking.patch b/meta-pipewire/recipes-multimedia/pipewire/pipewire/0001-null-sink-make-the-timerfd-non-blocking.patch
new file mode 100644
index 000000000..71e526f86
--- /dev/null
+++ b/meta-pipewire/recipes-multimedia/pipewire/pipewire/0001-null-sink-make-the-timerfd-non-blocking.patch
@@ -0,0 +1,43 @@
+From c633004bf310998580ff8944c59d94689d6fca87 Mon Sep 17 00:00:00 2001
+From: George Kiagiadakis <george.kiagiadakis@collabora.com>
+Date: Thu, 1 Jul 2021 11:37:01 +0300
+Subject: [PATCH] null-sink: make the timerfd non-blocking
+
+Fixes #1377
+
+Upstream-Status: Backport [from master/0.3.32]
+Signed-off-by: George Kiagiadakis <george.kiagiadakis@collabora.com>
+---
+ spa/plugins/support/null-audio-sink.c | 8 ++++++--
+ 1 file changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/spa/plugins/support/null-audio-sink.c b/spa/plugins/support/null-audio-sink.c
+index e9588f1e2..12e671db8 100644
+--- a/spa/plugins/support/null-audio-sink.c
++++ b/spa/plugins/support/null-audio-sink.c
+@@ -221,8 +221,11 @@ static void on_timeout(struct spa_source *source)
+ 	spa_log_trace(this->log, "timeout");
+
+ 	if (spa_system_timerfd_read(this->data_system,
+-				this->timer_source.fd, &expirations) < 0)
++				this->timer_source.fd, &expirations) < 0) {
++		if (errno == EAGAIN)
++			return;
+ 		perror("read timerfd");
++	}
+
+ 	nsec = this->next_time;
+
+@@ -818,7 +821,8 @@ impl_init(const struct spa_handle_factory *factory,
+
+ 	this->timer_source.func = on_timeout;
+ 	this->timer_source.data = this;
+-	this->timer_source.fd = spa_system_timerfd_create(this->data_system, CLOCK_MONOTONIC, SPA_FD_CLOEXEC);
++	this->timer_source.fd = spa_system_timerfd_create(this->data_system, CLOCK_MONOTONIC,
++							  SPA_FD_CLOEXEC | SPA_FD_NONBLOCK);
+ 	this->timer_source.mask = SPA_IO_IN;
+ 	this->timer_source.rmask = 0;
+ 	this->timerspec.it_value.tv_sec = 0;
+--
+2.30.2
+
diff --git a/meta-pipewire/recipes-multimedia/pipewire/pipewire/0002-node-driver-make-the-timerfd-non-blocking.patch b/meta-pipewire/recipes-multimedia/pipewire/pipewire/0002-node-driver-make-the-timerfd-non-blocking.patch
new file mode 100644
index 000000000..5a59d8676
--- /dev/null
+++ b/meta-pipewire/recipes-multimedia/pipewire/pipewire/0002-node-driver-make-the-timerfd-non-blocking.patch
@@ -0,0 +1,43 @@
+From 5aa9c953909b936ba215ebca77461a17160f59fb Mon Sep 17 00:00:00 2001
+From: George Kiagiadakis <george.kiagiadakis@collabora.com>
+Date: Thu, 1 Jul 2021 11:50:40 +0300
+Subject: [PATCH] node-driver: make the timerfd non-blocking
+
+Relates to #1377
+
+Upstream-Status: Backport [from master/0.3.32]
+Signed-off-by: George Kiagiadakis <george.kiagiadakis@collabora.com>
+---
+ spa/plugins/support/node-driver.c | 8 ++++++--
+ 1 file changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/spa/plugins/support/node-driver.c b/spa/plugins/support/node-driver.c
+index 34533d0d9..32964110d 100644
+--- a/spa/plugins/support/node-driver.c
++++ b/spa/plugins/support/node-driver.c
+@@ -119,8 +119,11 @@ static void on_timeout(struct spa_source *source)
+ 	spa_log_trace(this->log, "timeout");
+
+ 	if (spa_system_timerfd_read(this->data_system,
+-				this->timer_source.fd, &expirations) < 0)
++				this->timer_source.fd, &expirations) < 0) {
++		if (errno == EAGAIN)
++			return;
+ 		perror("read timerfd");
++	}
+
+ 	nsec = this->next_time;
+
+@@ -349,7 +352,8 @@ impl_init(const struct spa_handle_factory *factory,
+
+ 	this->timer_source.func = on_timeout;
+ 	this->timer_source.data = this;
+-	this->timer_source.fd = spa_system_timerfd_create(this->data_system, CLOCK_MONOTONIC, SPA_FD_CLOEXEC);
++	this->timer_source.fd = spa_system_timerfd_create(this->data_system, CLOCK_MONOTONIC,
++							  SPA_FD_CLOEXEC | SPA_FD_NONBLOCK);
+ 	this->timer_source.mask = SPA_IO_IN;
+ 	this->timer_source.rmask = 0;
+ 	this->timerspec.it_value.tv_sec = 0;
+--
+2.30.2
+
diff --git a/meta-pipewire/recipes-multimedia/pipewire/pipewire_0.3.30.bbappend b/meta-pipewire/recipes-multimedia/pipewire/pipewire_0.3.30.bbappend
index d45e0538b..85c9edab3 100644
--- a/meta-pipewire/recipes-multimedia/pipewire/pipewire_0.3.30.bbappend
+++ b/meta-pipewire/recipes-multimedia/pipewire/pipewire_0.3.30.bbappend
@@ -8,6 +8,8 @@ PACKAGECONFIG = "\
 
 SRC_URI += "\
     file://0001-alsa-plugin-allow-specifying-a-media.role-on-the-vir.patch \
+    file://0001-null-sink-make-the-timerfd-non-blocking.patch \
+    file://0002-node-driver-make-the-timerfd-non-blocking.patch \
 "
 
 do_install_append() {