[PATCH] drm/amdgpu/gfx8: only apply compute quantums to KCQs

[PATCH] drm/amdgpu/gfx8: only apply compute quantums to KCQs

[Alex Deucher]

Don't apply to KIQ.  Seems to cause problems on KIQ
on some ARM platforms.

Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5658
Fixes: 91cf34bc5a55 ("drm/amdgpu/gfx8: align mqd settings with KFD")
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index f7c2b149acd0a..4241453e0ec8b 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -4546,9 +4546,11 @@ static int gfx_v8_0_mqd_init(struct amdgpu_ring *ring)
 	/* set static priority for a queue/ring */
 	gfx_v8_0_mqd_set_priority(ring, mqd);
 	tmp = RREG32(mmCP_HQD_QUANTUM);
-	tmp = REG_SET_FIELD(tmp, CP_HQD_QUANTUM, QUANTUM_EN, 1);
-	tmp = REG_SET_FIELD(tmp, CP_HQD_QUANTUM, QUANTUM_SCALE, 1);
-	tmp = REG_SET_FIELD(tmp, CP_HQD_QUANTUM, QUANTUM_DURATION, 10);
+	if (ring != &adev->gfx.kiq[0].ring) {
+		tmp = REG_SET_FIELD(tmp, CP_HQD_QUANTUM, QUANTUM_EN, 1);
+		tmp = REG_SET_FIELD(tmp, CP_HQD_QUANTUM, QUANTUM_SCALE, 1);
+		tmp = REG_SET_FIELD(tmp, CP_HQD_QUANTUM, QUANTUM_DURATION, 10);
+	}
 	mqd->cp_hqd_quantum = tmp;
 
 	/* map_queues packet doesn't need activate the queue,
-- 
2.55.0