[PATCH 5.15 070/245] drm/amdgpu: skip to program GFXDEC registers for suspend abort

Greg Kroah-Hartman
2024-02-27T14:04:06Z

From: Prike Liang <Prike.Liang@amd.com>

[ Upstream commit 93bafa32a6918154aa0caf9f66679a32c2431357 ]

In the suspend abort cases, the gfx power rail doesn't turn off so
some GFXDEC registers/CSB can't reset to default value and at this
moment reinitialize GFXDEC/CSB will result in an unexpected error.
So let skip those program sequence for the suspend abort case.

Signed-off-by: Prike Liang <Prike.Liang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 2 ++
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 8 ++++++++
3 files changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 1f1e7966beb51..dbef22f56482e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1045,6 +1045,8 @@ struct amdgpu_device {
bool in_s3;
bool in_s4;
bool in_s0ix;
+ /* indicate amdgpu suspension status */
+ bool suspend_complete;

atomic_t in_gpu_reset;
enum pp_mp1_state mp1_state;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index deae92fde3b88..57943e9008710 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -2252,6 +2252,7 @@ static int amdgpu_pmops_suspend(struct device *dev)
struct drm_device *drm_dev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(drm_dev);

+ adev->suspend_complete = false;
if (amdgpu_acpi_is_s0ix_active(adev))
adev->in_s0ix = true;
else
@@ -2264,6 +2265,7 @@ static int amdgpu_pmops_suspend_noirq(struct device *dev)
struct drm_device *drm_dev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(drm_dev);

+ adev->suspend_complete = true;
if (amdgpu_acpi_should_gpu_reset(adev))
return amdgpu_asic_reset(adev);

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index de1fab165041f..fb37c0d4b35b4 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -3268,6 +3268,14 @@ static int gfx_v9_0_cp_gfx_start(struct amdgpu_device *adev)

gfx_v9_0_cp_gfx_enable(adev, true);

+ /* Now only limit the quirk on the APU gfx9 series and already
+ * confirmed that the APU gfx10/gfx11 needn't such update.
+ */
+ if (adev->flags & AMD_IS_APU &&
+ adev->in_s3 && !adev->suspend_complete) {
+ DRM_INFO(" Will skip the CSB packet resubmit\n");
+ return 0;
+ }
r = amdgpu_ring_alloc(ring, gfx_v9_0_get_csb_size(adev) + 4 + 3);
if (r) {
DRM_ERROR("amdgpu: cp failed to lock ring (%d).\n", r);
--
2.43.0