RISC-V uses kernel_fpu_begin()/kernel_fpu_end() like several other architectures. Enabling hardware FP requires overriding the ISA string for the relevant compilation units. Signed-off-by: Samuel Holland <samuel.holland@xxxxxxxxxx> --- drivers/gpu/drm/amd/display/Kconfig | 5 ++++- drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c | 6 ++++-- drivers/gpu/drm/amd/display/dc/dml/Makefile | 6 ++++++ drivers/gpu/drm/amd/display/dc/dml2/Makefile | 6 ++++++ 4 files changed, 20 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/display/Kconfig index 901d1961b739..49b33b2f6701 100644 --- a/drivers/gpu/drm/amd/display/Kconfig +++ b/drivers/gpu/drm/amd/display/Kconfig @@ -8,7 +8,10 @@ config DRM_AMD_DC depends on BROKEN || !CC_IS_CLANG || ARM64 || RISCV || SPARC64 || X86_64 select SND_HDA_COMPONENT if SND_HDA_CORE # !CC_IS_CLANG: https://github.com/ClangBuiltLinux/linux/issues/1752 - select DRM_AMD_DC_FP if (X86 || LOONGARCH || (PPC64 && ALTIVEC) || (ARM64 && KERNEL_MODE_NEON && !CC_IS_CLANG)) + select DRM_AMD_DC_FP if ARM64 && KERNEL_MODE_NEON && !CC_IS_CLANG + select DRM_AMD_DC_FP if PPC64 && ALTIVEC + select DRM_AMD_DC_FP if RISCV && FPU + select DRM_AMD_DC_FP if LOONGARCH || X86 help Choose this option if you want to use the new display engine support for AMDGPU. This adds required support for Vega and diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c index 4ae4720535a5..834dca0396f1 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c @@ -35,6 +35,8 @@ #include <asm/neon.h> #elif defined(CONFIG_LOONGARCH) #include <asm/fpu.h> +#elif defined(CONFIG_RISCV) +#include <asm/switch_to.h> #endif /** @@ -89,7 +91,7 @@ void dc_fpu_begin(const char *function_name, const int line) depth = __this_cpu_inc_return(fpu_recursion_depth); if (depth == 1) { -#if defined(CONFIG_X86) || defined(CONFIG_LOONGARCH) +#if defined(CONFIG_X86) || defined(CONFIG_LOONGARCH) || defined(CONFIG_RISCV) kernel_fpu_begin(); #elif defined(CONFIG_PPC64) if (cpu_has_feature(CPU_FTR_VSX_COMP)) @@ -122,7 +124,7 @@ void dc_fpu_end(const char *function_name, const int line) depth = __this_cpu_dec_return(fpu_recursion_depth); if (depth == 0) { -#if defined(CONFIG_X86) || defined(CONFIG_LOONGARCH) +#if defined(CONFIG_X86) || defined(CONFIG_LOONGARCH) || defined(CONFIG_RISCV) kernel_fpu_end(); #elif defined(CONFIG_PPC64) if (cpu_has_feature(CPU_FTR_VSX_COMP)) diff --git a/drivers/gpu/drm/amd/display/dc/dml/Makefile b/drivers/gpu/drm/amd/display/dc/dml/Makefile index ea7d60f9a9b4..5c8f840ef323 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/Makefile +++ b/drivers/gpu/drm/amd/display/dc/dml/Makefile @@ -43,6 +43,12 @@ dml_ccflags := -mfpu=64 dml_rcflags := -msoft-float endif +ifdef CONFIG_RISCV +include $(srctree)/arch/riscv/Makefile.isa +# Remove V from the ISA string, like in arch/riscv/Makefile, but keep F and D. +dml_ccflags := -march=$(shell echo $(riscv-march-y) | sed -E 's/(rv32ima|rv64ima)([^v_]*)v?/\1\2/') +endif + ifdef CONFIG_CC_IS_GCC ifneq ($(call gcc-min-version, 70100),y) IS_OLD_GCC = 1 diff --git a/drivers/gpu/drm/amd/display/dc/dml2/Makefile b/drivers/gpu/drm/amd/display/dc/dml2/Makefile index acff3449b8d7..15ad6e3a2173 100644 --- a/drivers/gpu/drm/amd/display/dc/dml2/Makefile +++ b/drivers/gpu/drm/amd/display/dc/dml2/Makefile @@ -42,6 +42,12 @@ dml2_ccflags := -mfpu=64 dml2_rcflags := -msoft-float endif +ifdef CONFIG_RISCV +include $(srctree)/arch/riscv/Makefile.isa +# Remove V from the ISA string, like in arch/riscv/Makefile, but keep F and D. +dml2_ccflags := -march=$(shell echo $(riscv-march-y) | sed -E 's/(rv32ima|rv64ima)([^v_]*)v?/\1\2/') +endif + ifdef CONFIG_CC_IS_GCC ifeq ($(call cc-ifversion, -lt, 0701, y), y) IS_OLD_GCC = 1 -- 2.42.0
