diff options
| author | Victor Lu <victorchengchi.lu@amd.com> | 2020-07-21 12:08:34 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-08-04 17:29:28 -0400 |
| commit | 3d4e52d0cf24b424c668fa8ab1269725796d4ec4 (patch) | |
| tree | 995005ae2f83fe501d44be137c1eee7f970f6ff2 /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | |
| parent | da83b385f3eba1d695bc8014d8a5c0a791188c16 (diff) | |
drm/amd/display: Add debugfs for forcing stream timing sync
[why]
There's currently no method to enable multi-stream synchronization from
userspace and we don't check the VSDB bits to know whether or not
specific displays should have the feature enable.
[how]
Add a debugfs entry that controls a new DM debug option,
"force_timing_sync". This debug option will set on any newly created
stream following the change to the debug option.
Expose a new interface from DC that performs the timing sync and a helper
to the "force_timing_sync" debugfs that iterates over the current streams
and modifies the current synchornization state and grouping.
Example usage to force a resync (from an X based desktop):
echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_force_timing_sync
xset dpms force off && xset dpms force on
Signed-off-by: Victor Lu <victorchengchi.lu@amd.com>
Reviewed-by: Aurabindo Jayamohanan Pillai <Aurabindo.Pillai@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Acked-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c index 9610e628baf0..ae6b1313403e 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c @@ -2184,6 +2184,38 @@ static const struct drm_info_list amdgpu_dm_debugfs_list[] = { }; /* + * Sets the force_timing_sync debug optino from the given string. + * All connected displays will be force synchronized immediately. + * Usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_force_timing_sync + */ +static int force_timing_sync_set(void *data, u64 val) +{ + struct amdgpu_device *adev = data; + + adev->dm.force_timing_sync = (bool)val; + + amdgpu_dm_trigger_timing_sync(adev->ddev); + + return 0; +} + +/* + * Gets the force_timing_sync debug option value into the given buffer. + * Usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_force_timing_sync + */ +static int force_timing_sync_get(void *data, u64 *val) +{ + struct amdgpu_device *adev = data; + + *val = adev->dm.force_timing_sync; + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(force_timing_sync_ops, force_timing_sync_get, + force_timing_sync_set, "%llu\n"); + +/* * Sets the DC visual confirm debug option from the given string. * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_visual_confirm */ @@ -2242,5 +2274,8 @@ int dtn_debugfs_init(struct amdgpu_device *adev) debugfs_create_file_unsafe("amdgpu_dm_dmub_fw_state", 0644, root, adev, &dmub_fw_state_fops); + debugfs_create_file_unsafe("amdgpu_dm_force_timing_sync", 0644, root, + adev, &force_timing_sync_ops); + return 0; } |