linux-stable.git/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c, branch v6.8

drm/amd/display: Wake DMCUB before executing GPINT commands

2023-12-19T19:59:02+00:00

[Why]
DMCUB can be in idle when we attempt to interface with the HW through
the GPINT mailbox resulting in a system hang.

[How]
Add dc_wake_and_execute_gpint() to wrap the wake, execute, sleep
sequence.

If the GPINT executes successfully then DMCUB will be put back into
sleep after the optional response is returned.

It functions similar to the inbox command interface.

Cc: Mario Limonciello 
Cc: Alex Deucher 
Cc: stable@vger.kernel.org
Reviewed-by: Hansen Dsouza 
Acked-by: Wayne Lin 
Signed-off-by: Nicholas Kazlauskas 
Tested-by: Daniel Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: add a debugfs interface for the DMUB trace mask

2023-11-17T14:30:49+00:00

For features that are implemented primarily in DMUB (e.g. PSR), it is
useful to be able to trace them at a DMUB level from the kernel,
especially when debugging issues. So, introduce a debugfs interface that
is able to read and set the DMUB trace mask dynamically at runtime and
document how to use it.

Cc: Alex Deucher 
Cc: Mario Limonciello 
Reviewed-by: Aurabindo Pillai 
Acked-by: Christian König 
Signed-off-by: Hamza Mahfooz 
Signed-off-by: Alex Deucher

drm/amd/display: Fix a debugfs null pointer error

2023-11-17T14:29:54+00:00

[WHY & HOW]
Check whether get_subvp_en() callback exists before calling it.

Cc: Mario Limonciello 
Cc: Alex Deucher 
Cc: stable@vger.kernel.org
Reviewed-by: Alex Hung 
Acked-by: Alex Hung 
Signed-off-by: Aurabindo Pillai 
Tested-by: Daniel Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: add interface to query SubVP status

2023-10-26T23:02:31+00:00

[Why&How]
To enable automated testing through IGT, expose an API that is
accessible through debugfs to query current status of SubVP feature.

Reviewed-by: Alvin Lee 
Acked-by: Roman Li 
Signed-off-by: Aurabindo Pillai 
Tested-by: Daniel Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: Add DCHUBBUB callback to report MALL status

2023-09-11T21:16:35+00:00

[Why&How]
For enabling automated testing, add a hook to DCHUBBUB interface so that
mall status can be queried by userspace through debugfs. This removes
dependence on requiring a userspace tool like UMR for querying status
for MALL static screen IGT test.

Reviewed-by: Alvin Lee 
Acked-by: Stylon Wang 
Signed-off-by: Aurabindo Pillai 
Tested-by: Daniel Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: set default return value for ODM Combine debugfs

2023-09-11T21:13:35+00:00

[Why&How]
Set a default return value of -ENOTSUPP to indicate that the hardware
does not support querying ODM Combine mode.

Reviewed-by: Rodrigo Siqueira 
Acked-by: Stylon Wang 
Signed-off-by: Aurabindo Pillai 
Tested-by: Daniel Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: Add debugfs interface for ODM combine info

2023-08-30T19:37:59+00:00

[Why]
For use with IGT tests in userspace, the number of ODM segments in use
is required to be exposed to userspace to verify that ODM Combine is
working as expected when special timings are committed.

[How]
Add a connector specific debugfs entry that prints the number of ODM
segments in use.

Reviewed-by: Wenjing Liu 
Acked-by: Hamza Mahfooz 
Signed-off-by: Aurabindo Pillai 
Signed-off-by: Alex Deucher

drm/amd/display: Fix incorrect comment

2023-08-30T19:37:33+00:00

Fix incorrect comment about hardware capabilities debugfs interface.

Reviewed-by: Jerry Zuo 
Acked-by: Hamza Mahfooz 
Signed-off-by: Aurabindo Pillai 
Signed-off-by: Alex Deucher

drm/amd/display: Expose mall capability

2023-08-30T18:58:29+00:00

[Why&How]
Export a debugfs file to report whether MALL cache is supported by the
asic or not.

Reviewed-by: Hersen Wu 
Acked-by: Wayne Lin 
Signed-off-by: Aurabindo Pillai 
Tested-by: Daniel Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: Use seq_puts() in 'amdgpu_current_colorspace_show()' & 'edp_ilr_show()'

2023-07-07T17:39:02+00:00

Replace seq_printf with seq_puts when there is no argument list.

Fix the checkpatch warning:
WARNING: Prefer seq_puts to seq_printf

Cc: Wayne Lin 
Cc: Harry Wentland 
Cc: Rodrigo Siqueira 
Cc: Aurabindo Pillai 
Signed-off-by: Srinivasan Shanmugam 
Reviewed-by: Rodrigo Siqueira 
Signed-off-by: Alex Deucher