diff options
| author | Hans Verkuil <hans.verkuil@cisco.com> | 2017-06-28 04:14:28 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-09-23 07:51:44 -0400 |
| commit | 1e33936d3baee3b688ec12b372534522b9256032 (patch) | |
| tree | 1673deaead005adbe1133adb51a140f39666a638 /drivers/media/platform/Kconfig | |
| parent | 67f2a06f14a9419bc2da0a8e6b440c6813dccdb0 (diff) | |
media: cec-gpio: add HDMI CEC GPIO driver
Add a simple HDMI CEC GPIO driver that sits on top of the cec-pin framework.
While I have heard of SoCs that use the GPIO pin for CEC (apparently an
early RockChip SoC used that), the main use-case of this driver is to
function as a debugging tool.
By connecting the CEC line to a GPIO pin on a Raspberry Pi 3 for example
it turns it into a CEC debugger and protocol analyzer.
With 'cec-ctl --monitor-pin' the CEC traffic can be analyzed.
But of course it can also be used with any hardware project where the
HDMI CEC line is hooked up to a pull-up gpio line.
In addition this has (optional) support for tracing HPD changes if the
HPD is connected to a GPIO.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/platform/Kconfig')
| -rw-r--r-- | drivers/media/platform/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig index 7e7cc49b8674..e4c89a16a3e7 100644 --- a/drivers/media/platform/Kconfig +++ b/drivers/media/platform/Kconfig @@ -553,6 +553,16 @@ config VIDEO_MESON_AO_CEC This is a driver for Amlogic Meson SoCs AO CEC interface. It uses the generic CEC framework interface. CEC bus is present in the HDMI connector and enables communication + +config CEC_GPIO + tristate "Generic GPIO-based CEC driver" + depends on PREEMPT + select CEC_CORE + select CEC_PIN + select GPIOLIB + ---help--- + This is a generic GPIO-based CEC driver. + The CEC bus is present in the HDMI connector and enables communication between compatible devices. config VIDEO_SAMSUNG_S5P_CEC |