From: Hans Verkuil hans.verkuil@cisco.com
This patch series adds support for the Tegra CEC functionality.
It has two prerequisites:
this cec-notifier patch: https://patchwork.linuxtv.org/patch/42521/
and this workaround: http://www.spinics.net/lists/dri-devel/msg147038.html
A proper fix needs to be found for that workaround, but it is good enough for testing this patch series.
The first patch documents the CEC bindings, the second adds support for this to tegra124.dtsi and enables it for the Jetson TK1.
The third patch adds the CEC driver itself and the final patch adds the cec notifier support to the drm/tegra driver in order to notify the CEC driver whenever the physical address changes.
I expect that the dts changes apply as well to the Tegra X1/X2 and possibly other Tegra SoCs, but I can only test this with my Jetson TK1 board.
The dt-bindings and the tegra-cec driver would go in through the media subsystem, the drm/tegra part through the drm subsystem and the dts changes through (I guess) the linux-tegra developers. Luckily they are all independent of one another.
To test this you need the CEC utilities from git://linuxtv.org/v4l-utils.git.
To build this:
git clone git://linuxtv.org/v4l-utils.git cd v4l-utils ./bootstrap.sh; ./configure make sudo make install # optional, you really only need utils/cec*
To test:
cec-ctl --playback # configure as playback device cec-ctl -S # detect all connected CEC devices
See here for the public CEC API:
https://hverkuil.home.xs4all.nl/spec/uapi/cec/cec-api.html
Regards,
Hans
Hans Verkuil (4): dt-bindings: document the tegra CEC bindings ARM: tegra: add CEC support to tegra124.dtsi tegra-cec: add Tegra HDMI CEC driver drm/tegra: add cec-notifier support
.../devicetree/bindings/media/tegra-cec.txt | 26 ++ MAINTAINERS | 8 + arch/arm/boot/dts/tegra124-jetson-tk1.dts | 4 + arch/arm/boot/dts/tegra124.dtsi | 12 +- drivers/gpu/drm/tegra/drm.h | 3 + drivers/gpu/drm/tegra/hdmi.c | 9 + drivers/gpu/drm/tegra/output.c | 6 + drivers/media/platform/Kconfig | 11 + drivers/media/platform/Makefile | 2 + drivers/media/platform/tegra-cec/Makefile | 1 + drivers/media/platform/tegra-cec/tegra_cec.c | 506 +++++++++++++++++++++ drivers/media/platform/tegra-cec/tegra_cec.h | 127 ++++++ 12 files changed, 714 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/media/tegra-cec.txt create mode 100644 drivers/media/platform/tegra-cec/Makefile create mode 100644 drivers/media/platform/tegra-cec/tegra_cec.c create mode 100644 drivers/media/platform/tegra-cec/tegra_cec.h