linux-stable.git/drivers/gpu/drm/amd/display/modules/power, branch v5.8

drm/amd/display: Convert memory from cpu to fw endianness correctly

2020-04-22T22:11:48+00:00

[Why]
Current code does not guarantee the correct endianness of memory being
copied to fw, specifically in the case where cpu isn't little endian.

[How]
Windows and Diags are always little endian, so we define a macro that
does nothing. Linux already defines this macro and will do the correct
endianness conversion.

Signed-off-by: Wyatt Wood 
Reviewed-by: Harry Wentland 
Acked-by: Anthony Koo 
Acked-by: Rodrigo Siqueira 
Signed-off-by: Alex Deucher

drm/amd/display: Remove byte swapping for dmcub abm config table

2020-04-22T22:11:47+00:00

[Why]
Since x86 and dmcub are both little endian, byte swapping isn't
necessary. Dmcu requires byte swapping as it is big endian.

[How]
Add flag to function definitions to determine if byte swapping is
necessary.

Signed-off-by: Wyatt Wood 
Reviewed-by: Anthony Koo 
Acked-by: Rodrigo Siqueira 
Signed-off-by: Alex Deucher

drm/amd/display: Fix ABM config copy for dmcub

2020-04-09T14:43:16+00:00

Decouple dmcub config copy from dmcu iram copy.

Signed-off-by: Wyatt Wood 
Reviewed-by: Anthony Koo 
Acked-by: Rodrigo Siqueira 
Signed-off-by: Alex Deucher

drm/amd/display: Implement abm config table copy to dmcub

2020-04-09T14:43:16+00:00

[Why]
Driver must pass abm config table to dmub fw. This provides various
parameters for abm functionality.

[How]
There is too much data to be passed in an inbox message, so we must pass
this data using an indirect buffer.  Copy the table to cw7 via x86,
driver copies to fw_state structure.

Signed-off-by: Wyatt Wood 
Reviewed-by: Nicholas Kazlauskas 
Acked-by: Rodrigo Siqueira 
Acked-by: Tony Cheng 
Signed-off-by: Alex Deucher

drm/amd/display: Add ABM driver implementation

2020-04-01T18:44:44+00:00

[Why]
Moving ABM from DMCU to DMCUB.

[How]
Add ABM driver files and implementation.

Signed-off-by: Wyatt Wood 
Reviewed-by: Nicholas Kazlauskas 
Acked-by: Rodrigo Siqueira 
Signed-off-by: Alex Deucher

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