From: Stefan Ott via buildroot <buildroot@buildroot.org>
To: buildroot@buildroot.org
Cc: Bernd Kuhls <bernd@kuhls.net>, Stefan Ott <stefan@ott.net>
Subject: [Buildroot] [PATCH 1/1] package/libcec: Add option to use kernel framework
Date: Mon, 29 Jun 2026 04:06:36 +0200 [thread overview]
Message-ID: <20260629020636.4066911-1-stefan@ott.net> (raw)
As explained in libcec's README.raspberrypi.md:
On a recent Raspberry Pi that's using the vc4_kms_3d dtoverlay,
you have to use the Linux Kernel driver and disable the Raspberry Pi
driver with -DHAVE_RPI_API=0 to use CEC.
This patch adds an option to do just that to the libcec package.
Signed-off-by: Stefan Ott <stefan@ott.net>
---
package/libcec/Config.in | 9 +++++++++
package/libcec/libcec.mk | 6 ++++++
2 files changed, 15 insertions(+)
diff --git a/package/libcec/Config.in b/package/libcec/Config.in
index 2dddc53635..136891a6e3 100644
--- a/package/libcec/Config.in
+++ b/package/libcec/Config.in
@@ -13,6 +13,15 @@ config BR2_PACKAGE_LIBCEC
http://libcec.pulse-eight.com
+config BR2_PACKAGE_LIBCEC_LINUX_API
+ bool "enable Linux kernel CEC framework support"
+ default y if BR2_arm || BR2_aarch64
+ depends on BR2_PACKAGE_LIBCEC
+ help
+ enable modern Linux Kernel CEC Framework support
+
+ This is needed to use CEC on the Raspberry Pi
+
comment "libcec needs a toolchain w/ C++, wchar, threads, dynamic library, gcc >= 4.7"
depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS || \
!BR2_USE_WCHAR || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 || \
diff --git a/package/libcec/libcec.mk b/package/libcec/libcec.mk
index 0e730503da..f7c5bce204 100644
--- a/package/libcec/libcec.mk
+++ b/package/libcec/libcec.mk
@@ -24,6 +24,12 @@ ifeq ($(BR2_PACKAGE_XLIB_LIBXRANDR),y)
LIBCEC_DEPENDENCIES += xlib_libXrandr
endif
+ifeq ($(BR2_PACKAGE_LIBCEC_LINUX_API),y)
+LIBCEC_CONF_OPTS += \
+ -DHAVE_RPI_API=0 \
+ -DHAVE_LINUX_API=1
+endif
+
# Disable information about how libCEC is compiled.
LIBCEC_CONF_OPTS += -DHAVE_GIT_BIN="" \
-DHAVE_WHOAMI_BIN="" \
--
2.54.0
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