[PATCH 00/14] drm/amd: Delete defunct DAL power level code

["Timur Kristóf" <timur.kristof@gmail.com>]

Delete unused code related to DAL power levels.
It seems that the DAL power level concept has been
never fully implemented and was thus non-functional
in amdgpu.

DCE 11.0 and 11.2 never actually relied on the
power level because they calculate all necessary
power requirements in dce_calcs and communicate
that using dm_pp_apply_display_requirements() to
the power management code.

DCE 6, 8 and 10 also didn't rely on power levels
because they always just set the maximum possible
display clock and the power management code
already takes that into account when setting the
power state. This was somewhat improved recently
by also using dm_pp_apply_display_requirements()
on these DCE versions.

The code base for newer GPUs doesn't use the
concept of power levels anymore either, so
this change reduces the maintenance burden
of the old DCE code.

On the DC side:

dm_pp_apply_power_level_change_request() was never
implemented in amdgpu_dm, and DC has been working
fine for years without it. Let's delete the dummy
function and the code that calls it.

With that, we can also delete the power levels
and the static arrays containing hardcoded power
level values. These were never used for anything,
only for finding the maximum supported display clock.

On the AMDGPU PM side:

The get_dal_power_level() implementations were
dummy on SMU10, Vega10, Vega12 and Vega20 meaning
that they didn't return an actual DAL power level,
and were non-functional on SMU8 which always
returned the highest possible power level.
Nothing actually relied on the power level
returned by these functions. Let's delete them.

What's next:

After this code cleanup lands, I have plans to
further improve display power management on old DCE.

Timur Kristóf (14):
  drm/amd/display: Delete unimplemented
    dm_pp_apply_power_level_change_request()
  drm/amd/display: Delete dce_get_required_clocks_state()
  drm/amd/display: Remove min/max clock levels from clk_mgr
  drm/amd/display: Delete max_clocks_state from dm_pp_static_clock_info
  drm/amd/display: Set max supported display clock without
    max_clks_by_state
  drm/amd/display: Delete max_clks_by_state from DCE clock manager
  drm/amd/display: Delete disp_clk_voltage from integrated info
  drm/amd/display: Delete dm_pp_clocks_state
  drm/amd/pm: Delete unused get_display_power_level() function
  drm/amd/pm: Delete dummy get_dal_power_level implementations
  drm/amd/pm: Delete non-functional SMU8 get_dal_power_level
    implementation
  drm/amd/pm: Delete vddc_dep_on_dal_pwrl
  drm/amd/pm: Delete get_dal_power_level
  drm/amd/pm: Delete PP_DAL_POWERLEVEL

 .../amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c  |  39 -----
 .../gpu/drm/amd/display/dc/bios/bios_parser.c |  36 -----
 .../drm/amd/display/dc/bios/bios_parser2.c    |   9 --
 .../display/dc/clk_mgr/dce100/dce_clk_mgr.c   | 144 ++----------------
 .../display/dc/clk_mgr/dce100/dce_clk_mgr.h   |   3 -
 .../dc/clk_mgr/dce110/dce110_clk_mgr.c        |  25 ---
 .../dc/clk_mgr/dce112/dce112_clk_mgr.c        |  41 -----
 .../dc/clk_mgr/dce120/dce120_clk_mgr.c        |  16 --
 drivers/gpu/drm/amd/display/dc/dm_services.h  |   4 -
 .../drm/amd/display/dc/dm_services_types.h    |  30 ----
 .../amd/display/dc/inc/hw/clk_mgr_internal.h  |   4 -
 .../display/include/grph_object_ctrl_defs.h   |   9 --
 drivers/gpu/drm/amd/include/dm_pp_interface.h |  19 ---
 .../gpu/drm/amd/include/kgd_pp_interface.h    |   2 -
 .../gpu/drm/amd/pm/powerplay/amd_powerplay.c  |  22 ---
 .../amd/pm/powerplay/hwmgr/hardwaremanager.c  |  10 --
 .../amd/pm/powerplay/hwmgr/processpptables.c  |   1 -
 .../drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.c  |  48 ------
 .../drm/amd/pm/powerplay/hwmgr/smu8_hwmgr.c   |  64 --------
 .../drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c |  18 ---
 .../drm/amd/pm/powerplay/hwmgr/vega12_hwmgr.c |  16 --
 .../drm/amd/pm/powerplay/hwmgr/vega20_hwmgr.c |  17 ---
 .../amd/pm/powerplay/inc/hardwaremanager.h    |   3 -
 drivers/gpu/drm/amd/pm/powerplay/inc/hwmgr.h  |   4 -
 24 files changed, 11 insertions(+), 573 deletions(-)

-- 
2.53.0