Re: [PATCH 0/4] Fix stack usage of DML

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 





On 2021-09-08 21:00, Harry Wentland wrote:
With the '-Werror' enablement patch the amdgpu build was failing
on clang builds because a bunch of functions were blowing past
the 1024 byte stack frame default. Due to this we also noticed
that a lot of functions were passing large structs by value
instead of by pointer.

This series attempts to fix this.

There is still one remaining function that blows the 1024 limit by 40 bytes:

drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn21/display_mode_vba_21.c:3397:6:
error: stack frame size of 1064 bytes in function
'dml21_ModeSupportAndSystemConfigurationFull' [-Werror,-Wframe-larger-than=]

This will be a slightly more challenging fix but I'll see if we can get it
below 1024 by breaking it into smaller functions.

With this series I can build amdgpu with CC=clang and a stack frame limit of
1064.

This series boots on a Radeon RX 5500 XT.

Harry Wentland (4):
   drm/amd/display: Pass display_pipe_params_st as const in DML
   drm/amd/display: Pass all structs in display_rq_dlg_helpers by pointer
   drm/amd/display: Fix rest of pass-by-value structs in DML
   drm/amd/display: Allocate structs needed by dcn_bw_calc_rq_dlg_ttu in
     pipe_ctx

Series LGTM,

Reviewed-by: Leo Li <sunpeng.li@xxxxxxx>

Thanks!


  .../gpu/drm/amd/display/dc/calcs/dcn_calcs.c  |  55 ++--
  .../drm/amd/display/dc/dcn20/dcn20_resource.c |   2 +-
  .../dc/dml/dcn20/display_rq_dlg_calc_20.c     | 158 +++++------
  .../dc/dml/dcn20/display_rq_dlg_calc_20.h     |   4 +-
  .../dc/dml/dcn20/display_rq_dlg_calc_20v2.c   | 156 +++++------
  .../dc/dml/dcn20/display_rq_dlg_calc_20v2.h   |   4 +-
  .../dc/dml/dcn21/display_rq_dlg_calc_21.c     | 156 +++++------
  .../dc/dml/dcn21/display_rq_dlg_calc_21.h     |   4 +-
  .../dc/dml/dcn30/display_rq_dlg_calc_30.c     | 132 ++++-----
  .../dc/dml/dcn30/display_rq_dlg_calc_30.h     |   4 +-
  .../dc/dml/dcn31/display_rq_dlg_calc_31.c     | 166 ++++++------
  .../dc/dml/dcn31/display_rq_dlg_calc_31.h     |   4 +-
  .../drm/amd/display/dc/dml/display_mode_lib.h |   4 +-
  .../display/dc/dml/display_rq_dlg_helpers.c   | 256 +++++++++---------
  .../display/dc/dml/display_rq_dlg_helpers.h   |  20 +-
  .../display/dc/dml/dml1_display_rq_dlg_calc.c | 246 ++++++++---------
  .../display/dc/dml/dml1_display_rq_dlg_calc.h |  10 +-
  .../gpu/drm/amd/display/dc/inc/core_types.h   |   3 +
  18 files changed, 695 insertions(+), 689 deletions(-)




[Index of Archives]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux