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Message-Id: <20230717222923.3026018-1-samuel.holland@sifive.com>
Date: Mon, 17 Jul 2023 15:29:23 -0700
From: Samuel Holland <samuel.holland@...ive.com>
To: Harry Wentland <harry.wentland@....com>,
Leo Li <sunpeng.li@....com>,
Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
Alex Deucher <alexander.deucher@....com>,
Christian König <christian.koenig@....com>
Cc: Samuel Holland <samuel.holland@...ive.com>,
Daniel Vetter <daniel@...ll.ch>,
David Airlie <airlied@...il.com>,
Nathan Chancellor <nathan@...nel.org>,
Nick Desaulniers <ndesaulniers@...gle.com>,
"Pan, Xinhui" <Xinhui.Pan@....com>, Tom Rix <trix@...hat.com>,
amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: [PATCH] drm/amd/display: Allow building DC with clang on RISC-V
clang on RISC-V appears to be unaffected by the bug causing excessive
stack usage in calculate_bandwidth(). clang 16 with -fstack-usage
reports a 304 byte stack frame size with CONFIG_ARCH_RV32I, and 512
bytes with CONFIG_ARCH_RV64I.
Signed-off-by: Samuel Holland <samuel.holland@...ive.com>
---
drivers/gpu/drm/amd/display/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/display/Kconfig
index bf0a655d009e..901d1961b739 100644
--- a/drivers/gpu/drm/amd/display/Kconfig
+++ b/drivers/gpu/drm/amd/display/Kconfig
@@ -5,7 +5,7 @@ menu "Display Engine Configuration"
config DRM_AMD_DC
bool "AMD DC - Enable new display engine"
default y
- depends on BROKEN || !CC_IS_CLANG || X86_64 || SPARC64 || ARM64
+ 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))
--
2.40.1
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