Thread (7 messages) 7 messages, 3 authors, 2021-07-21

Re: [RFC v2 2/2] drm/amd/display: Use PPC FPU functions

From: Christian König <christian.koenig@amd.com>
Date: 2021-07-21 06:30:30
Also in: amd-gfx, lkml

Am 21.07.21 um 06:48 schrieb Anson Jacob:
Use kernel_fpu_begin & kernel_fpu_end for PPC

Depends on "ppc/fpu: Add generic FPU api similar to x86"

v2:
- Got rid of macro switch for PPC as header file with same
   name as x86 is added by previous patch in the series

Signed-off-by: Anson Jacob <redacted>
CC: Christoph Hellwig <hch@infradead.org>
CC: Rodrigo Siqueira <redacted>
CC: Harry Wentland <harry.wentland@amd.com>
CC: Christian König <christian.koenig@amd.com>
Looks good in general, but question is what about other architectures 
like ARM?

Regards,
Christian.
quoted hunk ↗ jump to hunk
---
  drivers/gpu/drm/amd/display/dc/os_types.h | 29 -----------------------
  1 file changed, 29 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/os_types.h b/drivers/gpu/drm/amd/display/dc/os_types.h
index 126c2f3a4dd3..47ef434f93d8 100644
--- a/drivers/gpu/drm/amd/display/dc/os_types.h
+++ b/drivers/gpu/drm/amd/display/dc/os_types.h
@@ -51,38 +51,9 @@
  #define dm_error(fmt, ...) DRM_ERROR(fmt, ##__VA_ARGS__)
  
  #if defined(CONFIG_DRM_AMD_DC_DCN)
-#if defined(CONFIG_X86)
  #include <asm/fpu/api.h>
  #define DC_FP_START() kernel_fpu_begin()
  #define DC_FP_END() kernel_fpu_end()
-#elif defined(CONFIG_PPC64)
-#include <asm/switch_to.h>
-#include <asm/cputable.h>
-#define DC_FP_START() { \
-	if (cpu_has_feature(CPU_FTR_VSX_COMP)) { \
-		preempt_disable(); \
-		enable_kernel_vsx(); \
-	} else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) { \
-		preempt_disable(); \
-		enable_kernel_altivec(); \
-	} else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) { \
-		preempt_disable(); \
-		enable_kernel_fp(); \
-	} \
-}
-#define DC_FP_END() { \
-	if (cpu_has_feature(CPU_FTR_VSX_COMP)) { \
-		disable_kernel_vsx(); \
-		preempt_enable(); \
-	} else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) { \
-		disable_kernel_altivec(); \
-		preempt_enable(); \
-	} else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) { \
-		disable_kernel_fp(); \
-		preempt_enable(); \
-	} \
-}
-#endif
  #endif
  
  /*
  
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