[0/3] Fix privacy issue for MEI CSI

Message

Wu, Wentong June 3, 2024, 8:26 a.m. UTC

Currently if starting stream goes with privacy mode on, the whole
pipeline will fail because MEI CSI counts privacy mode on as error.
In face, the ongoing MEI command is well executed by firmware as
well even if privacy mode is turned on. The status (-1) of command
response is just to indicate current privacy on status instead of
failed to execute command by firmware. This patch set changes the
behavior to notify privacy mode on via v4l2 privacy control instead
of fail the ongoing MEI command.

This patch set adds one dedicated lock for v4l2 control handler to
avoid dead locking issue as well. And the useless privacy status in
struct mei_csi is removed to make code clean.

Wentong Wu (3):
  media: ivsc: csi: don't count privacy on as error
  media: ivsc: csi: add separate lock for v4l2 control handler
  media: ivsc: csi: remove privacy status in struct mei_csi

 drivers/media/pci/intel/ivsc/mei_csi.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)