xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

media: cec: rework the cec event handling

Browse Source 
Event handling was always fairly simplistic since there were only
two events. With the addition of pin events this needed to be redesigned.

The state_change and lost_msgs events are now core events with the
guarantee that the last state is always available. The new pin events
are a queue of events (up to 64 for each event) and the oldest event
will be dropped if the application cannot keep up. Lost events are
marked with a new event flag.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Hans Verkuil
2017-07-11 03:30:39 -03:00
committed by Mauro Carvalho Chehab
parent 6303d97873
commit 6b2bbb0874
4 changed files with 125 additions and 70 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/uapi/linux/cec.h
View File

@@ -412,6 +412,7 @@ struct cec_log_addrs {
#define CEC_EVENT_PIN_HIGH 4
#define CEC_EVENT_FL_INITIAL_STATE (1 << 0)
#define CEC_EVENT_FL_DROPPED_EVENTS (1 << 1)
/**
* struct cec_event_state_change - used when the CEC adapter changes state.
@@ -424,7 +425,7 @@ struct cec_event_state_change {
};
/**
* struct cec_event_lost_msgs - tells you how many messages were lost due.
* struct cec_event_lost_msgs - tells you how many messages were lost.
* @lost_msgs: how many messages were lost.
*/
struct cec_event_lost_msgs {