linux-stable.git/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.h, branch v5.0 Linux kernel stable tree drm/amd/display: Add support for hw_state logging via debugfs 2018-08-27T20:20:17+00:00 Nicholas Kazlauskas nicholas.kazlauskas@amd.com 2018-08-14T19:40:57+00:00 e498eb7136042aa9a352b1039c678537f4694158 [Why] We have logging methods for printing hardware state for newer ASICs but no way to trigger the log output. [How] Add support for triggering the output via writing to a debugfs file entry. Log output currently goes into dmesg for convenience, but accessing via a read should be possible later. Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Reviewed-by: Jordan Lazare <Jordan.Lazare@amd.com> Acked-by: Leo Li <sunpeng.li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
[Why]

We have logging methods for printing hardware state for newer ASICs
but no way to trigger the log output.

[How]

Add support for triggering the output via writing to a debugfs file
entry. Log output currently goes into dmesg for convenience, but
accessing via a read should be possible later.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Jordan Lazare <Jordan.Lazare@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: Add front end for dp debugfs files 2018-07-05T21:38:38+00:00 David Francis David.Francis@amd.com 2018-06-01T13:49:06+00:00 dc38fd9dac3e15538c7c238c4dfb98ceb408fa19 As part of hardware certification, read-write access to the link rate, lane count, voltage swing, pre-emphasis, and PHY test pattern of DP connectors is required. This commit adds debugfs files that will correspond to these values. The file operations are not yet implemented: currently writing or reading them does nothing. Signed-off-by: David Francis <David.Francis@amd.com> Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
As part of hardware certification, read-write access to
the link rate, lane count, voltage swing, pre-emphasis,
and PHY test pattern of DP connectors is required.  This commit
adds debugfs files that will correspond to these values.
The file operations are not yet implemented: currently
writing or reading them does nothing.

Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>