Commen=
t # 6
on bug 10727=
7
from Paul Menzel
(In reply to Paul Menzel from comment #3)
> (In reply to Christian K=C3=B6nig from comment #2)
[=E2=80=A6]
> > > amdgpu_device_ip_suspend [amdgpu] (694=
.390 ms @ 75.000977)
> >=20
> > This is hardware teardown and rather interesting and the only poi=
nt we could
> > actually do something. Can you figure out what takes so long here?
>=20
> I=E2=80=99ll try to figure that out.
I increased the maximum depth to 10, and according to the trace the loop in
`gfx_v9_0_enter_rlc_safe_mode()` is the culprit. Also, in all the function =
is
called three times.
static void gfx_v9_0_enter_rlc_safe_mode(struct amdgpu_device *adev)
{
uint32_t rlc_setting, data;
unsigned i;
if (adev->gfx.rlc.in_safe_mode)
return;
/* if RLC is not enabled, do nothing */
rlc_setting =3D RREG32_SOC15(GC, 0, mmRLC_CNTL);
if (!(rlc_setting & RLC_CNTL__RLC_ENABLE_F32_MASK))
return;
if (adev->cg_flags &
(AMD_CG_SUPPORT_GFX_CGCG | AMD_CG_SUPPORT_GFX_MGCG |
AMD_CG_SUPPORT_GFX_3D_CGCG)) {
data =3D RLC_SAFE_MODE__CMD_MASK;
data |=3D (1 << RLC_SAFE_MODE__MESSAGE__SHIFT);
WREG32_SOC15(GC, 0, mmRLC_SAFE_MODE, data);
/* wait for RLC_SAFE_MODE */
for (i =3D 0; i < adev->usec_timeout; i++) {
if (!REG_GET_FIELD(SOC15_REG_OFFSET(GC, 0,
mmRLC_SAFE_MODE), RLC_SAFE_MODE, CMD))
break;
udelay(1);
}
adev->gfx.rlc.in_safe_mode =3D true;
}
}