50us is not enough to wait for cp ready after gpu reset on some navi asics.
Signed-off-by: Xiaojie Yuan <xiaojie.y...@amd.com>
Suggested-by: Jack Xiao <jack.x...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index 86db40717d38..7d40c73a5ab7 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -2371,7 +2371,17 @@ static void gfx_v10_0_cp_gfx_enable(struct amdgpu_device
*adev, bool enable)
adev->gfx.gfx_ring[i].sched.ready = false;
}
WREG32_SOC15(GC, 0, mmCP_ME_CNTL, tmp);
- udelay(50);
+
+ for (i = 0; i < adev->usec_timeout; i++) {
+ if (RREG32_SOC15(GC, 0, mmCP_STAT) == 0)
+ break;
+ udelay(1);
+ }
+
+ if (i >= adev->usec_timeout)
+ DRM_ERROR("failed to %s cp gfx\n", enable ? "unhalt" : "halt");
+
+ return 0;
}
static int gfx_v10_0_cp_gfx_load_pfp_microcode(struct amdgpu_device *adev)
--
2.20.1
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