drm/amd/display: Add backlight pwm debugfs

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[Why]
ABM enablement testing can be automated if a way of reading
target and current hardware backlight is available

[How]
Expand debugfs interface with two new entries.
Hook directly into dc interface.  Units are as
a fraction of 0x1000 = 100%

Use the built-in amdgpu function for creating
read-only debugfs files

Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

David Francis 2018-11-13 10:37:16 -05:00 • committed by Alex Deucher

parent 04a789bef3

commit f284975ef2

3 changed files with 70 additions and 2 deletions

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49

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

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20

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

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3

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

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