(updating Andrzej's email)
On Fri, Oct 1, 2021 at 2:50 PM Brian Norris briannorris@chromium.org wrote:
If the display is not enable()d, then we aren't holding a runtime PM reference here. Thus, it's easy to accidentally cause a hang, if user space is poking around at /dev/drm_dp_aux0 at the "wrong" time.
Let's get the panel and PM state right before trying to talk AUX.
Fixes: 0d97ad03f422 ("drm/bridge: analogix_dp: Remove duplicated code") Cc: stable@vger.kernel.org Cc: Tomeu Vizoso tomeu.vizoso@collabora.com Signed-off-by: Brian Norris briannorris@chromium.org
Changes in v2:
- Fix spelling in Subject
- DRM_DEV_ERROR() -> drm_err()
- Propagate errors from un-analogix_dp_prepare_panel()
.../drm/bridge/analogix/analogix_dp_core.c | 21 ++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-)
Ping? Do I need to do anything more here?
Thanks, Brian