Searched hist:c1d5fb019f65e1093c77734356f97b6e7ac4d629 (Results 1 – 2 of 2) sorted by relevance
| /openbmc/linux/include/trace/events/ |
| H A D | pwc.h | c1d5fb019f65e1093c77734356f97b6e7ac4d629 Fri Nov 09 13:03:26 CST 2018 Matwey V. Kornilov <matwey@sai.msu.ru> media: usb: pwc: Introduce TRACE_EVENTs for pwc_isoc_handler()
There were reports that PWC-based webcams don't work at some
embedded ARM platforms. [1] Isochronous transfer handler seems to
work too long leading to the issues in MUSB USB host subsystem.
Also note, that urb->giveback() handlers are still called with
disabled interrupts. In order to be able to measure performance of
PWC driver, traces are introduced in URB handler section.
[1] https://www.spinics.net/lists/linux-usb/msg165735.html
Signed-off-by: Matwey V. Kornilov <matwey@sai.msu.ru>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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| /openbmc/linux/drivers/media/usb/pwc/ |
| H A D | pwc-if.c | diff c1d5fb019f65e1093c77734356f97b6e7ac4d629 Fri Nov 09 13:03:26 CST 2018 Matwey V. Kornilov <matwey@sai.msu.ru> media: usb: pwc: Introduce TRACE_EVENTs for pwc_isoc_handler()
There were reports that PWC-based webcams don't work at some
embedded ARM platforms. [1] Isochronous transfer handler seems to
work too long leading to the issues in MUSB USB host subsystem.
Also note, that urb->giveback() handlers are still called with
disabled interrupts. In order to be able to measure performance of
PWC driver, traces are introduced in URB handler section.
[1] https://www.spinics.net/lists/linux-usb/msg165735.html
Signed-off-by: Matwey V. Kornilov <matwey@sai.msu.ru>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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