kernel/linux.git/drivers/gpu/drm/amd/display/include/gpio_interface.h, branch v6.6.132Linux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=v6.6.1322019-08-15T15:53:55+00:00drm/amd/display: refactor gpio to allocate hw_container in constructor2019-08-15T15:53:55+00:00Su Sung ChungSu.Chung@amd.com2019-07-08T15:31:39+00:00urn:sha1:91db9311945f01901ddb9813ce11364de214a156
[why]
if dynamic allocation fails during gpio_open, it will cause crash due to
page fault.
[how]
handle allocation when gpio object gets created and prevent from calling
gpio_open if allocation failed
Signed-off-by: Su Sung Chung <Su.Chung@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: add gpio lock/unlock2019-02-06T02:16:23+00:00Chiawen Huangchiawen.huang@amd.com2019-01-18T06:07:54+00:00urn:sha1:ac627caf6b9275a3df4730be3b8637c3bc232979
[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>
drm/amd/dc: Add dc display driver (v2)2017-09-26T21:01:32+00:00Harry Wentlandharry.wentland@amd.com2017-09-12T19:58:20+00:00urn:sha1:4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c
Supported DCE versions: 8.0, 10.0, 11.0, 11.2
v2: rebase against 4.11
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>