linux-stable.git/drivers/gpu/drm/amd/display/dc/dm_services.h, branch linux-5.10.y

drm/amd/display: Handle persistence in DM

2020-05-28T18:00:47+00:00

[Why]
Remove dm_write_persistent_data and dm_read_persistent_data as
persistence should be handled in DM.

[How]
Remove functions. Move read/write calls into DM layer while maintaining
logic.

Signed-off-by: Jaehyun Chung 
Reviewed-by: Anthony Koo 
Acked-by: Rodrigo Siqueira 
Signed-off-by: Alex Deucher

drm/amd/display: Drop CONFIG_DRM_AMD_DC_DMUB guards

2019-11-13T20:29:42+00:00

[Why]
Support for DMUB only depends on support for DC. It doesn't use floating
point so we don't need to guard it by any specific DCN revision.

[How]
Drop the guards and cleanup the newlines around each one.

Signed-off-by: Nicholas Kazlauskas 
Reviewed-by: Hersen Wu 
Acked-by: Harry Wentland 
Signed-off-by: Alex Deucher

drm/amd/display: Add DMUB support to DC

2019-11-13T20:29:42+00:00

DC will use DMUB for command submission and flow control during
initialization.

Register offloading as well as submitting some BIOS commands are part
of the DC internal interface but are guarded behind debug options.

It won't be functional in amdgpu_dm yet since we don't pass the
DMUB service to DC for use.

Signed-off-by: Nicholas Kazlauskas 
Reviewed-by: Hersen Wu 
Acked-by: Harry Wentland 
Signed-off-by: Alex Deucher

drm/amd/display: refactor dump_clk_registers

2019-07-18T19:18:09+00:00

[why]
for 2 purposes:

1. get raw register value dumped on the log, which will make it easier
to talk to other team who only knows about the register

2. enable other HW to be able to use the same interface as raven to log
clock register data

Signed-off-by: Su Sung Chung 
Reviewed-by: Tony Cheng 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher

drm/amd/display: Move dm_read_reg_func to dc_helper.

2019-03-21T04:39:48+00:00

Move out of header to dc_helper.c, in preparation for future
implementations.

Signed-off-by: Yongqiang Sun 
Reviewed-by: Tony Cheng 
Acked-by: Bhawanpreet Lakha 
Signed-off-by: Alex Deucher

drm/amd/display: change generic_reg_wait to void.

2019-03-21T04:39:47+00:00

we were only checking the return value in one place, thus changing
generic_reg_wait from int to void and reading the register instead of
getting it from generic_reg_wait, when we need the return value.

Signed-off-by: Yongqiang Sun 
Reviewed-by: Tony Cheng 
Acked-by: Bhawanpreet Lakha 
Signed-off-by: Alex Deucher

drm/amd/display: Refactor reg_set and reg_update.

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

[Why]
Current reg update and reg set use same functions and
only delta is update reads reg value and call update function.

[How]
Refactor reg update and reg set functions.
1.Implement different functions for reg update and reg set.
2.Wrap same process to a help function, both reg update and
reg set will call it.

Signed-off-by: Yongqiang Sun 
Reviewed-by: Tony Cheng 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher

drm/amd/display: PPLIB Hookup

2019-03-05T20:09:32+00:00

[Why]
Make dml and integration with pplib clearer.

[How]
Change the way the dml formula is initialized to make its values more
clear. Restructure DC interface with pplib into rv_funcs.
Cap clocks received from pplib.

Signed-off-by: Jun Lei 
Signed-off-by: Eryk Brol 
Reviewed-by: Dmytro Laktyushkin 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher

drm/amd/display: Add tracing to dc

2018-12-05T22:49:49+00:00

[Why]
Tracing is a useful and cheap debug functionality

[How]
This creates a new trace system amdgpu_dm, currently with
three trace events

amdgpu_dc_rreg and amdgpu_dc_wreg report the address and value
of any dc register reads and writes

amdgpu_dc_performance requires at least one of those two to be
enabled.  It counts the register reads and writes since the
last entry

v2: Don't check for NULL before kfree

Signed-off-by: David Francis 
Reviewed-by: Harry Wentland 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher

drm/amd/display: Support reading hw state from debugfs file

2018-08-27T20:20:49+00:00

[Why]

Logging hardware state can be done by triggering a write to the
debugfs file. It would also be useful to be able to read the hardware
state from the debugfs file to be able to generate a clean log without
timestamps.

[How]

Usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log

Threading is an obvious concern when dealing with multiple debugfs
operations and blocking on global state in dm or dc seems unfavorable.

Adding an extra parameter for the debugfs log context state is the
implementation done here. Existing code that made use of DTN_INFO
and its associated macros needed to be refactored to support this.

We don't know the size of the log in advance so it reallocates the
log string dynamically. Once the log has been generated it's copied
into the user supplied buffer for the debugfs. This allows for seeking
support but it's worth nothing that unlike triggering output via
dmesg the hardware state might change in-between reads if your buffer
size is too small.

Signed-off-by: Nicholas Kazlauskas 
Reviewed-by: Jordan Lazare 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher