From a89d8dc798bb46481f54929c5a67e4440e4d2f41 Mon Sep 17 00:00:00 2001
From: Mukul Joshi <mukul.joshi@amd.com>
Date: Thu, 29 Sep 2022 12:07:49 -0400
Subject: drm/amdgpu: Fix failure when switching to DPX mode
Git-commit: cb30544e3cadf2164a123859519521dc474d21eb
Patch-mainline: v6.5-rc1
References: jsc#PED-3527 jsc#PED-5475 jsc#PED-6068 jsc#PED-6070 jsc#PED-6116 jsc#PED-6120 jsc#PED-5065 jsc#PED-5477 jsc#PED-5511 jsc#PED-6041 jsc#PED-6069 jsc#PED-6071
Fix the if condition which causes dynamic repartitioning
to fail when trying to switch to DPX mode.
Signed-off-by: Mukul Joshi <mukul.joshi@amd.com>
Reviewed-by: Amber Lin <Amber.Lin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
index 69bac5b801ce..2f6d85090b55 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
@@ -1216,7 +1216,11 @@ static ssize_t amdgpu_gfx_set_compute_partition(struct device *dev,
if (!strncasecmp("SPX", buf, strlen("SPX"))) {
mode = AMDGPU_SPX_PARTITION_MODE;
} else if (!strncasecmp("DPX", buf, strlen("DPX"))) {
- if (num_xcc != 4 || num_xcc != 8)
+ /*
+ * DPX mode needs AIDs to be in multiple of 2.
+ * Each AID connects 2 XCCs.
+ */
+ if (num_xcc%4)
return -EINVAL;
mode = AMDGPU_DPX_PARTITION_MODE;
} else if (!strncasecmp("TPX", buf, strlen("TPX"))) {
--
2.42.0