drm/amd/display: add gpio lock/unlock

Browse source

[Why]
When querying HPD via GPIO flow,
it will create a new gpio object then free in the end of query.
There is a irql issue for HPD querying at ISR level.

[How]
Therefore, creating the HPD gpio object in dc_link and set it as unlcok in default.
1. reducing unnecessary malloc/free when HPD querying.
2. reducing init GPIO flow.
3. add lock/unlock to prevent multi gpio service running.

Signed-off-by: Chiawen Huang <chiawen.huang@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Chiawen Huang 2019-01-18 14:07:54 +08:00 • committed by Alex Deucher

parent cf7d98d254

commit ac627caf6b

6 changed files with 81 additions and 25 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

47

drivers/gpu/drm/amd/display/dc/core/dc_link.c

View file

1

drivers/gpu/drm/amd/display/dc/dc_link.h

View file

12

drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c

View file

28

drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c

View file

10

drivers/gpu/drm/amd/display/dc/gpio/gpio_service.h

View file

8

drivers/gpu/drm/amd/display/include/gpio_interface.h

View file