CHROMIUM: drm/rockchip: Refactor cdn-dp hdcp code
This patch transitions our rockchip driver to using the upstream
content_protection_property (located in drm_connector) as opposed to the
downstream version that's in mode_config.
In addition to the new location of the property, this patch also makes
HDCP enablement work via atomic commits in addition to the legacy
setproperty ioctl.
The trickiest part of making this work is ensuring we keep the
connector->state->content_protection value in sync with what the
hardware is doing. We're only allowed to change this value in
atomic_check (which we do for certain transitions), however we have to
be careful when updating it outside of atomic_check, this requires
locks. In order to update the property without races, we need a new property
worker whose job is to acquire the connection and dp locks and update the state.
It's not possible to do this without the dedicated worker since the hdcp event
worker doesn't hold the connection mutex, and can't acquire it since we
synchronously cancel it while holding the connection mutex elsewhere. Sigh.
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Change-Id: I22d2592096866d2346bc9b48f48e66e845a173f8
Reviewed-on: https://chromium-review.googlesource.com/864343
Commit-Ready: Sean Paul <seanpaul@google.com>
Tested-by: Sean Paul <seanpaul@google.com>
Reviewed-by: Sean Paul <seanpaul@google.com>
4 files changed
