Changes in Makefile

fbc988f236a60cf50a89da78fc6b7213daa9999c - drm/amd/display: Fix sanitizer check for the DML frame size limit

Sun, 27 Sep 2026 18:16:01 +0200

drm/amd/display: Fix sanitizer check for the DML frame size limitBuilding x86_64 allmodconfig with clang fails: .../dml2_0/dml21/src/dml2_core/dml2_core_dcn4_calcs.c:10491:13: error: stack frame size (3128) exceeds limit (3072) in 'dml_core_mode_programming' [-Werror,-Wframe-larger-than]That config enables both KASAN and UBSAN, and should get the 4096byte limit meant for clang COMPILE_TEST sanitizer builds. The checkin the dml and dml2_0 Makefiles concatenates the three symbols withno separator: ifeq ($(filter y,$(CONFIG_KASAN)$(CONFIG_KCSAN)$(CONFIG_UBSAN)),y)KASAN and KCSAN cannot be enabled together, so before UBSAN wasadded the string was at most "y". UBSAN can be enabled alongsideeither of them, and with both set the string becomes "yy",$(filter y,yy) is empty, and the build falls through to thenon-sanitizer limit of 3072. Adding UBSAN to the check thereforelowered the limit for the most heavily instrumented builds insteadof raising it.Separate the symbols with spaces so that $(filter) sees individualwords, and test for a non-empty result. Only the configs with twosanitizers enabled change behaviour.Found by KernelCI builds of the linus-next tree.Fixes: ebf8b0fd8508 ("drm/amd/display: Relax DML frame limit with UBSAN")Assisted-by: LLMSigned-off-by: Sasha Levin Signed-off-by: Alex Deucher (cherry picked from commit 0400d53fd03e7d4beb09fdabda42a7b2c4ca465d)Cc: stable@vger.kernel.org List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

15814c01ac57643edf1662a076d2961332f277a5 - drm/amd/display: Bump frame warning limit for all builds of dml

Thu, 24 Sep 2026 03:44:30 +0200

drm/amd/display: Bump frame warning limit for all builds of dmlSome configs with gcc are also now affected.Signed-off-by: Alex Deucher (cherry picked from commit 76b9706e7fa1a6e374703170128b1be2f590cda7) List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

18779dd84515db093fedb4ebaf0998c9b165a5fb - drm/amd/display: Bump frame warning limit for clang builds of dml

Fri, 21 Aug 2026 06:04:53 +0200

drm/amd/display: Bump frame warning limit for clang builds of dml[Why&How]When building the DML files with clang without any sanitizer or LTO,the following -Wframe-larger-than errors break the build underCONFIG_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 2048byte limit.Apply an existing approach of increasing the warn stack size to thenon-sanitizer path so plain clang builds use a 3072 byte limit.Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5642Signed-off-by: Ivan Lipski Signed-off-by: Alex Deucher (cherry picked from commit 21711b6e66bb7b41b1aec67b2d99aafe768c8fcb)Cc: stable@vger.kernel.org List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

0fd5e9ddf362b1253b3c94b858371f90400e5c4a - drm/amd/display: Relax DML frame limit with UBSAN

Wed, 23 Sep 2026 19:31:18 +0200

drm/amd/display: Relax DML frame limit with UBSAN[WHY]UBSAN instrumentation adds checks and handler calls and increasesstack usage in the large DML calculation functions, similar toKASAN and KCSAN. With UBSAN enabled these files exceed the default-Wframe-larger-than limit and fail to build when -Werror is in effect.Reproduced with LLVM (make LLVM=1, clang 19.1.1), CONFIG_UBSAN=y,CONFIG_GCOV_PROFILE_ALL=y and CONFIG_DRM_AMDGPU_WERROR=y on x86_64.[HOW]Include CONFIG_UBSAN in the sanitizer check that selects thehigher per-file frame warning limit in the dml and dml2_0Makefiles.Suggested-by: Leo Li Assisted-by: Copilot:Claude-Opus-5.5Signed-off-by: Alex Hung Signed-off-by: Alex Deucher (cherry picked from commit ebf8b0fd8508b744f85a8eee82b745b1d3502dd0)Cc: stable@vger.kernel.org List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

a7c7b927c8304a2d3bf18f744e3f265e3b8127ba - drm/amd/display: Add DML changes to support HDMI FRL

Fri, 24 Apr 2026 17:48:09 +0200

drm/amd/display: Add DML changes to support HDMI FRLThis adds DML support for HDMI FRL.Signed-off-by: Harry Wentland Reviewed-by: Fangzhi Zuo Tested-by: Dan Wheeler Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

70740454377f1ba3ff32f5df4acd965db99d055b - drm/amd/display: Apply e4479aecf658 to dml

Sat, 13 Dec 2025 07:16:43 +0100

drm/amd/display: Apply e4479aecf658 to dmlAfter an innocuous optimization change in clang-22, allmodconfig (whichenables CONFIG_KASAN and CONFIG_WERROR) breaks with: drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/display_mode_vba_32.c:1724:6: error: stack frame size (3144) exceeds limit (3072) in 'dml32_ModeSupportAndSystemConfigurationFull' [-Werror,-Wframe-larger-than] 1724 | void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib) | ^With clang-21, this function was already pretty close to the existinglimit of 3072 bytes. drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/display_mode_vba_32.c:1724:6: error: stack frame size (2904) exceeds limit (2048) in 'dml32_ModeSupportAndSystemConfigurationFull' [-Werror,-Wframe-larger-than] 1724 | void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib) | ^A similar situation occurred in dml2, which was resolved bycommit e4479aecf658 ("drm/amd/display: Increase sanitizer frame largerthan limit when compile testing with clang") by increasing the limit forclang when compile testing with certain sanitizer enabled, so thatallmodconfig (an easy testing target) continues to work.Apply that same change to the dml folder to clear up the warning forallmodconfig, unbreaking the build.Closes: https://github.com/ClangBuiltLinux/linux/issues/2135Signed-off-by: Nathan Chancellor Signed-off-by: Alex Deucher (cherry picked from commit 25314b453cf812150e9951a32007a32bba85707e)Cc: stable@vger.kernel.org List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

2d2e5472af6ecf79c30b40187e6bdf7a34578855 - drm/amd/display: Remove dml/dcn401 files and references

Tue, 27 May 2025 21:47:00 +0200

drm/amd/display: Remove dml/dcn401 files and references[WHY & HOW]DCN401 is only supported using DML2.1, so remove unused code and files.Reviewed-by: Alvin Lee Signed-off-by: Dillon Varone Signed-off-by: Alex Hung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

820ccf8cb2b145ab9fc12651f7f80339614fa46c - drm/amd/display: Respect user's CONFIG_FRAME_WARN more for dml files

Fri, 31 Jan 2025 23:31:19 +0100

drm/amd/display: Respect user's CONFIG_FRAME_WARN more for dml filesCurrently, there are several files in drm/amd/display that aim to have ahigher -Wframe-larger-than value to avoid instances of that warning witha lower value from the user's configuration. However, with the way thatit is currently implemented, it does not respect the user's request viaCONFIG_FRAME_WARN for a higher stack frame limit, which can cause painwhen new instances of the warning appear and break the build due toCONFIG_WERROR.Adjust the logic to switch from a hard coded -Wframe-larger-than valueto only using the value as a minimum clamp and deferring to therequested value from CONFIG_FRAME_WARN if it is higher.Suggested-by: Harry Wentland Reported-by: Greg Kroah-Hartman Closes: https://lore.kernel.org/2025013003-audience-opposing-7f95@gregkh/Signed-off-by: Nathan Chancellor Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

07cd40a0c9843653451f9355170770f6e42489c8 - drm/amd/display: Add missing DCN314 to the DML Makefile

Wed, 24 Jul 2024 17:29:13 +0200

drm/amd/display: Add missing DCN314 to the DML MakefileInclude display_mode_vba_314 and display_rq_dlg_calc_314 to the dmlMakefile.Acked-by: Tom Chung Signed-off-by: Rodrigo Siqueira Signed-off-by: Wayne Lin Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher (cherry picked from commit 089525632d40bbfa507f224c20563529b3f8a4b3) List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

1ddaaa244021aba8496536a6627b4ad2bc0f936a - Merge tag 'amd-drm-next-6.11-2024-06-07' of https://gitlab.freedesktop.org/agd5f/linux into drm-next

Tue, 11 Jun 2024 06:01:55 +0200

Merge tag 'amd-drm-next-6.11-2024-06-07' of https://gitlab.freedesktop.org/agd5f/linux into drm-nextamd-drm-next-6.11-2024-06-07:amdgpu:- DCN 4.0.x support- DCN 3.5 updates- GC 12.0 support- DP MST fixes- Cursor fixes- MES11 updates- MMHUB 4.1 support- DML2 Updates- DCN 3.1.5 fixes- IPS fixes- Various code cleanups- GMC 12.0 support- SDMA 7.0 support- SMU 13 updates- SR-IOV fixes- VCN 5.x fixes- MES12 support- SMU 14.x updates- Devcoredump improvements- Fixes for HDP flush on platforms with >4k pages- GC 9.4.3 fixes- RAS ACA updates- Silence UBSAN flex array warnings- MMHUB 3.3 updatesamdkfd:- Contiguous VRAM allocations- GC 12.0 support- SDMA 7.0 support- SR-IOV fixesradeon:- Backlight workaround for iMac- Silence UBSAN flex array warningsUAPI:- GFX12 modifier and DCC support Proposed Mesa changes: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29510- KFD GFX ALU exceptions Proposed ROCdebugger changes: https://github.com/ROCm/ROCdbgapi/commit/08c760622b6601abf906f75abbc5e21d9fd425df https://github.com/ROCm/ROCgdb/commit/944fe1c1414a68700414e86e32273b6bfa62ba6f- KFD Contiguous VRAM allocation flag Proposed ROCr/HIP changes: https://github.com/ROCm/ROCT-Thunk-Interface/commit/f7b4a269914a3ab4f1e2453c2879adb97b5cc9e5 https://github.com/ROCm/ROCR-Runtime/pull/214/commits/26e8530d05a775872cb06dde6693db72be0c454a https://github.com/ROCm/clr/commit/1d48f2a1ab38b632919c4b7274899b3faf4279ffSigned-off-by: Dave Airlie From: Alex Deucher Link: https://patchwork.freedesktop.org/patch/msgid/20240607195900.902537-1-alexander.deucher@amd.com List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

a28e4b672f042eb38d9b09f9d1fdf58c07052da4 - drm/amd/display: use ARCH_HAS_KERNEL_FPU_SUPPORT

Fri, 29 Mar 2024 08:18:28 +0100

drm/amd/display: use ARCH_HAS_KERNEL_FPU_SUPPORTNow that all previously-supported architectures selectARCH_HAS_KERNEL_FPU_SUPPORT, this code can depend on that symbol insteadof the existing list of architectures. It can also take advantage of thecommon kernel-mode FPU API and method of adjusting CFLAGS.Link: https://lkml.kernel.org/r/20240329072441.591471-14-samuel.holland@sifive.comSigned-off-by: Samuel Holland Acked-by: Alex Deucher Reviewed-by: Christoph Hellwig Acked-by: Christian König Cc: Borislav Petkov (AMD) Cc: Catalin Marinas Cc: Dave Hansen Cc: Huacai Chen Cc: Ingo Molnar Cc: Jonathan Corbet Cc: Masahiro Yamada Cc: Michael Ellerman Cc: Nathan Chancellor Cc: Nicolas Schier Cc: Palmer Dabbelt Cc: Russell King Cc: Thomas Gleixner Cc: WANG Xuerui Cc: Will Deacon Signed-off-by: Andrew Morton List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

06a990b6e0f58ad8bf2f1b5ee17b7e6106b764f1 - drm/amd/display: only use hard-float, not altivec on powerpc

Fri, 29 Mar 2024 08:18:27 +0100

drm/amd/display: only use hard-float, not altivec on powerpcThe compiler flags enable altivec, but that is not required; hard-float issufficient for the code to build and function.Drop altivec from the compiler flags and adjust the enable/disable code toonly enable FPU use.Link: https://lkml.kernel.org/r/20240329072441.591471-13-samuel.holland@sifive.comSigned-off-by: Michael Ellerman Signed-off-by: Samuel Holland Acked-by: Alex Deucher Acked-by: Christian König Cc: Borislav Petkov (AMD) Cc: Catalin Marinas Cc: Christoph Hellwig Cc: Dave Hansen Cc: Huacai Chen Cc: Ingo Molnar Cc: Jonathan Corbet Cc: Masahiro Yamada Cc: Nathan Chancellor Cc: Nicolas Schier Cc: Palmer Dabbelt Cc: Russell King Cc: Thomas Gleixner Cc: WANG Xuerui Cc: Will Deacon Signed-off-by: Andrew Morton List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

00c391102abc13763e2bfc90e05503109b19f074 - drm/amd/display: Add misc DC changes for DCN401

Wed, 20 Mar 2024 18:56:16 +0100

drm/amd/display: Add misc DC changes for DCN401Add miscellaneous changes to enable DCN401 initSigned-off-by: Aurabindo Pillai Acked-by: Rodrigo Siqueira Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

2728e9c7c84235d2d7bc1403174d071ffc82d6d2 - drm/amd/display: add DC changes for DCN351

Fri, 23 Feb 2024 15:40:25 +0100

drm/amd/display: add DC changes for DCN351Add DC support for DCN 3.5.1.Signed-off-by: Hamza Mahfooz Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

321036db915bc647d04750337eb002022c912857 - drm/amd/display: Increase frame-larger-than for all display_mode_vba files

Mon, 05 Feb 2024 22:54:05 +0100

drm/amd/display: Increase frame-larger-than for all display_mode_vba filesAfter a recent change in LLVM, allmodconfig (which has CONFIG_KCSAN=yand CONFIG_WERROR=y enabled) has a few new instances of-Wframe-larger-than for the mode support and system configurationfunctions: drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn20/display_mode_vba_20v2.c:3393:6: error: stack frame size (2144) exceeds limit (2048) in 'dml20v2_ModeSupportAndSystemConfigurationFull' [-Werror,-Wframe-larger-than] 3393 | void dml20v2_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib) | ^ 1 error generated. drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn21/display_mode_vba_21.c:3520:6: error: stack frame size (2192) exceeds limit (2048) in 'dml21_ModeSupportAndSystemConfigurationFull' [-Werror,-Wframe-larger-than] 3520 | void dml21_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib) | ^ 1 error generated. drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn20/display_mode_vba_20.c:3286:6: error: stack frame size (2128) exceeds limit (2048) in 'dml20_ModeSupportAndSystemConfigurationFull' [-Werror,-Wframe-larger-than] 3286 | void dml20_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib) | ^ 1 error generated.Without the sanitizers enabled, there are no warnings.This was the catalyst for commit 6740ec97bcdb ("drm/amd/display:Increase frame warning limit with KASAN or KCSAN in dml2") and that samechange was made to dml in commit 5b750b22530f ("drm/amd/display:Increase frame warning limit with KASAN or KCSAN in dml") but theframe_warn_flag variable was not applied to all files. Do so now toclear up the warnings and make all these files consistent.Cc: stable@vger.kernel.orgCloses: https://github.com/ClangBuiltLinux/linux/issue/1990Signed-off-by: Nathan Chancellor Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

5b750b22530fe53bf7fd6a30baacd53ada26911b - drm/amd/display: Increase frame warning limit with KASAN or KCSAN in dml

Thu, 30 Nov 2023 23:34:07 +0100

drm/amd/display: Increase frame warning limit with KASAN or KCSAN in dmlDoes the same thing as:commit 6740ec97bcdb ("drm/amd/display: Increase frame warning limit with KASAN or KCSAN in dml2")Reviewed-by: Harry Wentland Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202311302107.hUDXVyWT-lkp@intel.com/Fixes: 67e38874b85b ("drm/amd/display: Increase num voltage states to 40")Signed-off-by: Alex Deucher Cc: Alvin Lee Cc: Hamza Mahfooz Cc: Samson Tam Cc: Harry Wentland List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

a2719f91a17057f741b962f6ea4d337a374f6eb7 - drm/amd/display: Move bw_fixed from DML folder

Tue, 03 Oct 2023 16:14:49 +0200

drm/amd/display: Move bw_fixed from DML folderbw_fixed does not need any FPU operation, and it is used on DCE and DCN.For this reason, this commit moves bw_fixed to the basic folder outsideDML.Reviewed-by: Qingqing Zhuo Signed-off-by: Rodrigo Siqueira Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

13f9173af8da2d774f5a4fe532a347c538831f04 - drm/amd/display: Move custom_float from DML folder

Tue, 03 Oct 2023 16:05:56 +0200

drm/amd/display: Move custom_float from DML folderThe custom_float file does not have any FPU operation, so it should beinside DML. This commit moves the file to the basic folder.Reviewed-by: Qingqing Zhuo Signed-off-by: Rodrigo Siqueira Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

d310d18bfca90bca56672a7ad08b63a0d7c621d5 - drm/amd/display: Move dce_calcs from DML folder

Tue, 03 Oct 2023 16:24:28 +0200

drm/amd/display: Move dce_calcs from DML folderdce_calcs does not have FPU operations, and it is required for DCE andDCN. Remove this file from the DML folder and add it to the basic foldervisible for DCE and DCN.Reviewed-by: Qingqing Zhuo Signed-off-by: Rodrigo Siqueira Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile

69cc1864c99a35ba4133877b3170b87e74cd0202 - drm/amd/display: Add DCN35 DML

Thu, 03 Aug 2023 08:28:55 +0200

drm/amd/display: Add DCN35 DML[Why & How]Add DML handling for DCN35.Signed-off-by: Qingqing Zhuo Acked-by: Harry Wentland Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/dc/dml/Makefile