kernel/linux.git/drivers/media/cec, branch v4.17.1

media: cec-pin: Fixed ktime_t to ns conversion

2018-04-04T10:12:52+00:00

Older Kernels use a struct for ktime_t, which requires the conversion function ktime_to_ns to be used on some places. With this patch it will compile now also for older Kernel versions. Signed-off-by: Jasmin Jessich Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: cec-core: fix a bug at cec_error_inj_write()

2018-03-23T12:37:22+00:00

If the adapter doesn't have error_inj_parse_line() ops, the write() logic won't return -EINVAL, but, instead, it will keep looping, because "count" is a non-negative number. Reviewed-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: cec: improve CEC pin event handling

2018-03-22T12:16:52+00:00

It turns out that the struct cec_fh event buffer size of 64 events (64 for CEC_EVENT_PIN_CEC_LOW and 64 for _HIGH) is too small. It's about 160 ms worth of events and if the Raspberry Pi is busy, then it might take too long for the application to be scheduled so that it can drain the pending events. Increase these buffers to 800 events which is at least 2 seconds worth of events. There is also a FIFO in between the interrupt and the cec-pin thread. The thread passes the events on to the CEC core. It is important that should this FIFO fill up the cec core will be informed that events have been lost so this can be communicated to the user by setting CEC_EVENT_FL_DROPPED_EVENTS. It is very hard to debug CEC problems if events were lost without informing the user of that fact. If events were dropped due to the FIFO filling up, then the debugfs status file will let you know how many events were dropped. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: cec-pin: improve status log

2018-03-22T12:16:21+00:00

Keep track of the number of short or long start bits, the number of short or long data bits and the number of initiated or detected low drive conditions. Show this information in the status debugfs log. Helpful when debugging, particularly when doing error injection as well. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: cec-pin: add error injection support

2018-03-22T12:01:43+00:00

Implement all the error injection commands. The state machine gets new states for the various error situations, helper functions are added to detect whether an error injection is active and the actual error injections are implemented. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: cec-pin-error-inj: parse/show error injection

2018-03-22T12:00:59+00:00

Add support to the CEC Pin framework to parse error injection commands and to show them. The next patch will do the actual implementation of this. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: cec-pin: create cec_pin_start_timer() function

2018-03-22T12:00:27+00:00

This function will be needed for injecting a custom pulse. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: cec: add core error injection support

2018-03-22T11:59:31+00:00

Add two new ops (error_inj_show and error_inj_parse_line) to support error injection functionality for CEC adapters. If both are present, then the core will add a new error-inj debugfs file that can be used to see the current error injection commands and to set error injection commands. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: cec: improve debugging

2018-02-26T13:12:49+00:00

cec_transmit_msg_fh() first checked the message for errors, and only after the message was found to be valid did it log the message contents. However, that makes it hard to associate an error in the kernel log with the message since the message contents was never logged in that case. So swap the order: first log the message (once some very basic checks are done), and only after that check for errors. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: cec: add SPDX license info

2018-02-14T18:16:03+00:00

Replace the old license information with the corresponding SPDX license. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab