[PATCH] drm/amdgpu: Use another offset for GC 9.4.3 remap

[Zhang, Hawking]

[AMD Official Use Only - General]

Reviewed-by: Hawking Zhang <Hawking.Zhang at amd.com>

Regards,
Hawking
-----Original Message-----
From: Lazar, Lijo <Lijo.Lazar at amd.com>
Sent: Tuesday, November 28, 2023 19:26
To: amd-gfx at lists.freedesktop.org
Cc: Zhang, Hawking <Hawking.Zhang at amd.com>; Deucher, Alexander <Alexander.Deucher at amd.com>; Kuehling, Felix <Felix.Kuehling at amd.com>; Ma, Le <Le.Ma at amd.com>; Gadre, Mangesh <Mangesh.Gadre at amd.com>
Subject: [PATCH] drm/amdgpu: Use another offset for GC 9.4.3 remap

The legacy region at 0x7F000 maps to valid registers in GC 9.4.3 SOCs.
Use 0x1A000 offset instead as MMIO register remap region.

Signed-off-by: Lijo Lazar <lijo.lazar at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/soc15.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
index e3d41e8aac9d..9ad4d6d3122b 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -1162,6 +1162,11 @@ static int soc15_common_early_init(void *handle)
                        AMD_PG_SUPPORT_VCN_DPG |
                        AMD_PG_SUPPORT_JPEG;
                adev->external_rev_id = adev->rev_id + 0x46;
+               /* GC 9.4.3 uses MMIO register region hole at a different offset */
+               if (!amdgpu_sriov_vf(adev)) {
+                       adev->rmmio_remap.reg_offset = 0x1A000;
+                       adev->rmmio_remap.bus_addr = adev->rmmio_base + 0x1A000;
+               }
                break;
        default:
                /* FIXME: not supported yet */
--
2.25.1