在 2023/8/29 15:39, Sean Young 写道:
On Fri, Aug 25, 2023 at 07:53:08PM +0800, zelong dong wrote:
From: Zelong Dong<zelong.dong@xxxxxxxxxxx>
Meson IR Controller supports hardware decoder in Meson-S4 and later
SoC. So far, protocol NEC could be decoded by hardware decoder.
On Meson-S4, only the hardware decoder for NEC can be used using this
driver. Does the Meson-S4 hardware support software decoding? If
software decoding could be used, then any protocol could be supported,
not just NEC.
Also, out of interest, is there are documentation available for this
hardware?
Thanks,
Sean
Yes, IR driver still supports SW decoding on Meson-S4. The decode mode
could be changed by 'support_hw_decoder'.
If IR Controller works in SW decoding, driver will be registered by
RC_DRIVER_IR_RAW and allows all protocol.
Otherwise, driver will be registered by RC_DRIVER_SCANCODE and only
allows NEC.
489 if (ir->rc->driver_type == RC_DRIVER_IR_RAW) {
490 ir->rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
491 ir->rc->rx_resolution = MESON_RAW_TRATE;
492 ir->rc->min_timeout = 1;
493 ir->rc->timeout = IR_DEFAULT_TIMEOUT;
494 ir->rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
495 } else if (ir->rc->driver_type == RC_DRIVER_SCANCODE) {
496 ir->rc->allowed_protocols = RC_PROTO_BIT_NEC;
497 ir->rc->change_protocol = meson_ir_hw_decoder_init;
498 }
Do you get Meson-S4 datasheet? Please refer to chapter 13.5 Infrared Remote.
