A recent discussion about proposed interfaces for setting up the hardware wakeup filter lead to the conclusion that it could help to have the generic capability to encode and modulate scancodes into raw IR events so that drivers for hardware with a low level wake filter (on the level of pulse/space durations) can still easily implement the higher level scancode interface that is proposed.
This patchset is just a quick experiment to suggest how it might work. I'm not familiar with the hardware that could use it so it could well be a bit misdesigned in places (e.g. what sort of buffer length would the hardware have, do we need to support any kind of partial encoding, can the hardware/driver easily take care of allowing for a margin of error?). The first patch adds an encode callback to the existing raw ir handler struct and a helper function to encode a scancode for a given protocol. The third patch implements encode for NEC. The modulation is abstracted to use functions in patch 2 (pulse-distance is used by multiple protocols). Finally for debug purposes patch 4 modifies img-ir-raw to loop back the encoded data when a filter is altered. Should be pretty easy to apply similarly to any raw ir driver to try it out. James Hogan (4): rc: ir-raw: add scancode encoder callback rc: ir-raw: add modulation helpers rc: ir-nec-decoder: add encode capability DEBUG: rc: img-ir: raw: Add loopback on s_filter drivers/media/rc/img-ir/img-ir-raw.c | 30 ++++++++++++ drivers/media/rc/ir-nec-decoder.c | 91 ++++++++++++++++++++++++++++++++++++ drivers/media/rc/ir-raw.c | 70 +++++++++++++++++++++++++++ drivers/media/rc/rc-core-priv.h | 46 ++++++++++++++++++ include/media/rc-core.h | 3 ++ 5 files changed, 240 insertions(+) -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
