On 04/23/2015 03:03 PM, Kamil Debski wrote:
> From: Hans Verkuil <hansverk@xxxxxxxxx>
>
> The added HDMI CEC framework provides a generic kernel interface for
> HDMI CEC devices.
>
> Signed-off-by: Hans Verkuil <hansverk@xxxxxxxxx>
> [k.debski@xxxxxxxxxxx: Merged CEC Updates commit by Hans Verkuil]
> [k.debski@xxxxxxxxxxx: Merged Update author commit by Hans Verkuil]
> [k.debski@xxxxxxxxxxx: change kthread handling when setting logical
> address]
> [k.debski@xxxxxxxxxxx: code cleanup and fixes]
> [k.debski@xxxxxxxxxxx: add missing CEC commands to match spec]
> [k.debski@xxxxxxxxxxx: add RC framework support]
> [k.debski@xxxxxxxxxxx: move and edit documentation]
> [k.debski@xxxxxxxxxxx: add vendor id reporting]
> [k.debski@xxxxxxxxxxx: add possibility to clear assigned logical
> addresses]
> [k.debski@xxxxxxxxxxx: documentation fixes, clenaup and expansion]
> [k.debski@xxxxxxxxxxx: reorder of API structs and add reserved fields]
> [k.debski@xxxxxxxxxxx: fix handling of events and fix 32/64bit timespec
> problem]
> [k.debski@xxxxxxxxxxx: add cec.h to include/uapi/linux/Kbuild]
> Signed-off-by: Kamil Debski <k.debski@xxxxxxxxxxx>
> ---
> Documentation/cec.txt | 396 ++++++++++++++++
> drivers/media/Kconfig | 6 +
> drivers/media/Makefile | 2 +
> drivers/media/cec.c | 1161 +++++++++++++++++++++++++++++++++++++++++++++
> include/media/cec.h | 140 ++++++
> include/uapi/linux/Kbuild | 1 +
> include/uapi/linux/cec.h | 303 ++++++++++++
> 7 files changed, 2009 insertions(+)
> create mode 100644 Documentation/cec.txt
> create mode 100644 drivers/media/cec.c
> create mode 100644 include/media/cec.h
> create mode 100644 include/uapi/linux/cec.h
>
> + case CEC_S_ADAP_LOG_ADDRS: {
> + struct cec_log_addrs log_addrs;
> +
> + if (!(adap->capabilities & CEC_CAP_LOG_ADDRS))
> + return -ENOTTY;
> + if (copy_from_user(&log_addrs, parg, sizeof(log_addrs)))
> + return -EFAULT;
> + err = cec_claim_log_addrs(adap, &log_addrs, true);
Currently CEC_S_ADAP_LOG_ADDRS is always blocking, but since we have CEC_EVENT_READY
I think it makes sense to just return in non-blocking mode and have cec_claim_log_addrs
generate CEC_EVENT_READY when done. Userspace can then call G_ADAP_LOG_ADDRS to discover
the result.
What do you think?
Regards,
Hans
> + if (err)
> + return err;
> +
> + if (copy_to_user(parg, &log_addrs, sizeof(log_addrs)))
> + return -EFAULT;
> + break;
> + }
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