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drm/amd/display: Bump frame warning limit for clang builds of dml

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[Why&How]
When building the DML files with clang without any sanitizer or LTO,
the following -Wframe-larger-than errors break the build under
CONFIG_WERROR:

  display_mode_vba_30.c: error: stack frame size (2512) exceeds limit
    (2048) in 'dml30_ModeSupportAndSystemConfigurationFull'
  display_mode_vba_31.c: error: stack frame size (2416) exceeds limit
    (2048) in 'dml31_ModeSupportAndSystemConfigurationFull'
  display_mode_vba_314.c: error: stack frame size (2392) exceeds limit
    (2048) in 'dml314_ModeSupportAndSystemConfigurationFull'

Clang consistently spills more than gcc, pushing the frame past the 2048
byte limit.

Apply an existing approach of increasing the warn stack size to the
non-sanitizer path so plain clang builds use a 3072 byte limit.

Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5642
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 21711b6e66bb7b41b1aec67b2d99aafe768c8fcb)
Cc: stable@vger.kernel.org
This commit is contained in:
Ivan Lipski 2026-08-21 00:04:53 -04:00 committed by Alex Deucher
parent 0fd5e9ddf3
commit 18779dd845
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/amd/display/dc/dml/Makefile
View File

@ -36,7 +36,11 @@ ifneq ($(CONFIG_FRAME_WARN),0)
frame_warn_limit := 3072
endif
else
frame_warn_limit := 2048
ifeq ($(CONFIG_CC_IS_CLANG),y)
frame_warn_limit := 3072
else
frame_warn_limit := 2048
endif
endif
ifeq ($(call test-lt, $(CONFIG_FRAME_WARN), $(frame_warn_limit)),y)