linux-kernel - [PATCH 5.12 162/242] drm/amdgpu: Update NV SIMD-per-CU to 2

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Message-Id: <20210715182621.691426884@linuxfoundation.org>
Date:   Thu, 15 Jul 2021 20:38:44 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Joseph Greathouse <Joseph.Greathouse@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Felix Kuehling <Felix.Kuehling@....com>
Subject: [PATCH 5.12 162/242] drm/amdgpu: Update NV SIMD-per-CU to 2

From: Joseph Greathouse <Joseph.Greathouse@....com>

commit aa6158112645aae514982ad8d56df64428fcf203 upstream.

Navi series GPUs have 2 SIMDs per CU (and then 2 CUs per WGP).
The NV enum headers incorrectly listed this as 4, which later meant
we were incorrectly reporting the number of SIMDs in the HSA
topology. This could cause problems down the line for user-space
applications that want to launch a fixed amount of work to each
SIMD.

Signed-off-by: Joseph Greathouse <Joseph.Greathouse@....com>
Reviewed-by: Alex Deucher <alexander.deucher@....com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/amd/include/navi10_enum.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/include/navi10_enum.h
+++ b/drivers/gpu/drm/amd/include/navi10_enum.h
@@ -430,7 +430,7 @@ ARRAY_2D_DEPTH
  */
 
 typedef enum ENUM_NUM_SIMD_PER_CU {
-NUM_SIMD_PER_CU                          = 0x00000004,
+NUM_SIMD_PER_CU                          = 0x00000002,
 } ENUM_NUM_SIMD_PER_CU;
 
 /*