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drm/amdgpu/gfx10: explicitly wait for cp idle after halt/unhalt 

50us is not enough to wait for cp ready after gpu reset on some navi asics.

Signed-off-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Suggested-by: Jack Xiao <Jack.Xiao@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Xiaojie Yuan 2019-11-14 16:56:08 +08:00 committed by Alex Deucher
parent b4672c8a84
commit 387d40fd6f
1 changed files with 12 additions and 2 deletions
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14
drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
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@ -2400,7 +2400,7 @@ static int gfx_v10_0_wait_for_rlc_autoload_complete(struct amdgpu_device *adev)
return 0;
}
static void gfx_v10_0_cp_gfx_enable(struct amdgpu_device *adev, bool enable)
static int gfx_v10_0_cp_gfx_enable(struct amdgpu_device *adev, bool enable)
{
int i;
u32 tmp = RREG32_SOC15(GC, 0, mmCP_ME_CNTL);
@ -2413,7 +2413,17 @@ 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)