On Sat, Sep 16, 2017 at 4:28 PM, Hans Verkuil <hverkuil@xxxxxxxxx> wrote: > From: Hans Verkuil <hans.verkuil@xxxxxxxxx> > > 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@xxxxxxxxx> Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
