diff options
| author | Sean Young <sean@mess.org> | 2018-12-06 13:01:03 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-12-09 14:37:18 -0800 |
| commit | 01d3240a04f4c09392e13c77b54d4423ebce2d72 (patch) | |
| tree | 429aa466773d2210b59d0b5eaa68c418b211aafd /drivers/media/rc | |
| parent | ca5d1a7fad0f8a95cbcc992fcfd687b4c5653619 (diff) | |
| download | lwn-01d3240a04f4c09392e13c77b54d4423ebce2d72.tar.gz lwn-01d3240a04f4c09392e13c77b54d4423ebce2d72.zip | |
media: bpf: add bpf function to report mouse movement
Some IR remotes have a directional pad or other pointer-like thing that
can be used as a mouse. Make it possible to decode these types of IR
protocols in BPF.
Cc: netdev@vger.kernel.org
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'drivers/media/rc')
| -rw-r--r-- | drivers/media/rc/bpf-lirc.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/media/rc/bpf-lirc.c b/drivers/media/rc/bpf-lirc.c index 8b97fd1f0cea..390a722e6211 100644 --- a/drivers/media/rc/bpf-lirc.c +++ b/drivers/media/rc/bpf-lirc.c @@ -59,6 +59,28 @@ static const struct bpf_func_proto rc_keydown_proto = { .arg4_type = ARG_ANYTHING, }; +BPF_CALL_3(bpf_rc_pointer_rel, u32*, sample, s32, rel_x, s32, rel_y) +{ + struct ir_raw_event_ctrl *ctrl; + + ctrl = container_of(sample, struct ir_raw_event_ctrl, bpf_sample); + + input_report_rel(ctrl->dev->input_dev, REL_X, rel_x); + input_report_rel(ctrl->dev->input_dev, REL_Y, rel_y); + input_sync(ctrl->dev->input_dev); + + return 0; +} + +static const struct bpf_func_proto rc_pointer_rel_proto = { + .func = bpf_rc_pointer_rel, + .gpl_only = true, + .ret_type = RET_INTEGER, + .arg1_type = ARG_PTR_TO_CTX, + .arg2_type = ARG_ANYTHING, + .arg3_type = ARG_ANYTHING, +}; + static const struct bpf_func_proto * lirc_mode2_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) { @@ -67,6 +89,8 @@ lirc_mode2_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) return &rc_repeat_proto; case BPF_FUNC_rc_keydown: return &rc_keydown_proto; + case BPF_FUNC_rc_pointer_rel: + return &rc_pointer_rel_proto; case BPF_FUNC_map_lookup_elem: return &bpf_map_lookup_elem_proto; case BPF_FUNC_map_update_elem: |