This is a note to let you know that I've just added the patch titled
drm/amd/display: properly handling AGP aperture in vm setup
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-properly-handling-agp-aperture-in-vm-setup.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5c4e8c71d1202cd84d870e7e5cb8d6b52f9c3507 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@xxxxxxx>
Date: Tue, 31 Jan 2023 09:56:46 -0500
Subject: drm/amd/display: properly handling AGP aperture in vm setup
From: Alex Deucher <alexander.deucher@xxxxxxx>
commit 5c4e8c71d1202cd84d870e7e5cb8d6b52f9c3507 upstream.
Take into account whether or not the AGP aperture is
enabled or not when calculating the system aperture.
Fixes white screens with DCN 3.1.4.
Based on a patch from Yifan Zhang <yifan1.zhang@xxxxxxx>
Cc: Yifan Zhang <yifan1.zhang@xxxxxxx>
Acked-by: Harry Wentland <harry.wentland@xxxxxxx>
Reviewed-by: Yifan Zhang <yifan1.zhang@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 6.1.x
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 42 ++++++++++++++--------
1 file changed, 28 insertions(+), 14 deletions(-)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1193,24 +1193,38 @@ static void mmhub_read_system_context(st
memset(pa_config, 0, sizeof(*pa_config));
- logical_addr_low = min(adev->gmc.fb_start, adev->gmc.agp_start) >> 18;
- pt_base = amdgpu_gmc_pd_addr(adev->gart.bo);
-
- if (adev->apu_flags & AMD_APU_IS_RAVEN2)
- /*
- * Raven2 has a HW issue that it is unable to use the vram which
- * is out of MC_VM_SYSTEM_APERTURE_HIGH_ADDR. So here is the
- * workaround that increase system aperture high address (add 1)
- * to get rid of the VM fault and hardware hang.
- */
- logical_addr_high = max((adev->gmc.fb_end >> 18) + 0x1, adev->gmc.agp_end >> 18);
- else
- logical_addr_high = max(adev->gmc.fb_end, adev->gmc.agp_end) >> 18;
-
agp_base = 0;
agp_bot = adev->gmc.agp_start >> 24;
agp_top = adev->gmc.agp_end >> 24;
+ /* AGP aperture is disabled */
+ if (agp_bot == agp_top) {
+ logical_addr_low = adev->gmc.vram_start >> 18;
+ if (adev->apu_flags & AMD_APU_IS_RAVEN2)
+ /*
+ * Raven2 has a HW issue that it is unable to use the vram which
+ * is out of MC_VM_SYSTEM_APERTURE_HIGH_ADDR. So here is the
+ * workaround that increase system aperture high address (add 1)
+ * to get rid of the VM fault and hardware hang.
+ */
+ logical_addr_high = (adev->gmc.fb_end >> 18) + 0x1;
+ else
+ logical_addr_high = adev->gmc.vram_end >> 18;
+ } else {
+ logical_addr_low = min(adev->gmc.fb_start, adev->gmc.agp_start) >> 18;
+ if (adev->apu_flags & AMD_APU_IS_RAVEN2)
+ /*
+ * Raven2 has a HW issue that it is unable to use the vram which
+ * is out of MC_VM_SYSTEM_APERTURE_HIGH_ADDR. So here is the
+ * workaround that increase system aperture high address (add 1)
+ * to get rid of the VM fault and hardware hang.
+ */
+ logical_addr_high = max((adev->gmc.fb_end >> 18) + 0x1, adev->gmc.agp_end >> 18);
+ else
+ logical_addr_high = max(adev->gmc.fb_end, adev->gmc.agp_end) >> 18;
+ }
+
+ pt_base = amdgpu_gmc_pd_addr(adev->gart.bo);
page_table_start.high_part = (u32)(adev->gmc.gart_start >> 44) & 0xF;
page_table_start.low_part = (u32)(adev->gmc.gart_start >> 12);
Patches currently in stable-queue which might be from alexander.deucher@xxxxxxx are
queue-6.1/drm-amd-pm-bump-smu-13.0.0-driver_if-header-version.patch
queue-6.1/drm-amd-pm-bump-smu-13.0.7-driver_if-header-version.patch
queue-6.1/drm-amdgpu-fence-fix-oops-due-to-non-matching-drm_sched-init-fini.patch
queue-6.1/drm-amdgpu-smu-skip-pptable-init-under-sriov.patch
queue-6.1/drm-amdgpu-use-the-tgid-for-trace_amdgpu_vm_update_ptes.patch
queue-6.1/drm-amd-pm-add-smu-13.0.7-missing-getpptlimit-message-mapping.patch
queue-6.1/drm-amd-display-fix-cursor-offset-on-rotation-180.patch
queue-6.1/drm-amd-display-properly-handling-agp-aperture-in-vm-setup.patch
queue-6.1/drm-amdgpu-add-unique_id-support-for-gc-11.0.1-2.patch
