linux-stable.git/drivers/gpu/drm/amd/display/modules/power, branch linux-5.6.y

drm/amd/display: implement fw-driver interface for abm 2.4

2020-01-16T19:15:49+00:00

[Why]
IRAM definition needed for versions of DMCU containing ABM 2.4

[How]
Pass ABM 2.3 IRAM definition, which is compatible with ABM 2.4, to DMCU
when ABM 2.4 FW is detected

Signed-off-by: Josip Pavic 
Reviewed-by: Aric Cyr 
Acked-by: Harry Wentland 
Acked-by: Rodrigo Siqueira 
Signed-off-by: Alex Deucher

drm/amd/display: set minimum abm backlight level

2019-10-03T14:10:57+00:00

[Why]
A lot of the time, the backlight characteristic curve maps min backlight
to a non-zero value.
But there are cases where we want the curve to intersect at 0.
In this scenario even if OS never asks to set 0% backlight, the ABM
reduction can result in backlight being lowered close to 0.
This particularly can cause problems in some LED drivers, and in
general just looks like backlight is completely off.

[How]
Add default cap to disallow backlight from dropping below 1%
even after ABM reduction is applied.

Signed-off-by: Anthony Koo 
Reviewed-by: Aric Cyr 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher

drm/amd/display: define parameters for abm 2.3

2019-09-17T13:06:54+00:00

[Why]
Current configuration 0 is just a placeholder, and final parameters needed.
Also, configuration 1 is expected to emulate ABM 2.1 but is too aggressive.

[How]
Redefine configuration 0 with the finalized parameters, and increase the
contrast gain of configuration 1 so that it properly emulates ABM 2.1.

Signed-off-by: Josip Pavic 
Reviewed-by: Anthony Koo 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher

drm/amd/display: load iram for abm 2.3

2019-08-23T16:37:24+00:00

[Why]
ABM 2.3 firmware expects information in iRAM that differs from previous
versions of ABM, so a mechanism is required to provide it with that
information.

[How]
Extend the existing iRAM definition to include parameters added by
ABM 2.3, and load it if DMCU is running ABM 2.3.

Signed-off-by: Josip Pavic 
Reviewed-by: Anthony Koo 
Acked-by: Bhawanpreet Lakha 
Signed-off-by: Alex Deucher

drm/amd/display: Add missing newline at end of file

2019-06-17T16:02:03+00:00

"git diff" says:

    \ No newline at end of file

after modifying the file.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Alex Deucher

drm/amd/display: remove min reduction for abm 2.2 level 3

2019-04-10T18:53:28+00:00

[Why]
Image brightness compensation for solid color full screen images is
expected to be optimal for ABM 2.2 at level 3. The min reduction that is
currently being enforced prevents this from being achieved.

[How]
Remove the min reduction for ABM 2.2 at level 3

Signed-off-by: Josip Pavic 
Reviewed-by: Anthony Koo 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher

drm/amd/display: reduce abm min reduction, deviation gain and contrast factor

2019-03-19T20:36:49+00:00

[Why]
Increased power savings are desired for ABM 2.2.

[How]
Reduce the minimum reduction level, the deviation gain and the contrast factor
to allow for more aggressive operation of the algorithm.

Signed-off-by: Josip Pavic 
Reviewed-by: Anthony Koo 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher

drm/amd/display: Increase precision for backlight curve

2019-02-19T20:58:26+00:00

[Why]
We are currently losing precision when we convert from
16 bit --> 8 bit --> 16 bit.

[How]
We shouldn't down convert unnecessarily and lose precision.
Keep values at 16 bit and use directly.

Signed-off-by: Anthony Koo 
Reviewed-by: Aric Cyr 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher

drm/amd/display: Modify ABM 2.2 Max Reduction

2019-02-06T02:16:23+00:00

[Why]
Reduced backlight for ABM 2.2 at levels 1 and 2 is desired for
power savings.

[How]
Reduce the max reduction parameters for ABM 2.2

Signed-off-by: Josip Pavic 
Reviewed-by: Josip Pavic 
Acked-by: Bhawanpreet Lakha 
Signed-off-by: Alex Deucher

drm/amd/display: fix issue with DC brightness low with VB

2019-02-06T02:16:23+00:00

[Why]
The problem is that we accidentally stopped loading some of the IRAM bytes
used for the backlight ramping mechanism. This happened when we
started reserving some region of IRAM as DMCU FW write only.

[How]
This change will define a start+end region for the IRAM read only region.
So the parameters needed for the backlight operation will be loaded
since it will be defined outside of the read only region.

Signed-off-by: Anthony Koo 
Reviewed-by: Aric Cyr 
Acked-by: Bhawanpreet Lakha 
Signed-off-by: Alex Deucher