drm/amdkfd: Disable idle optimization for chained runlist

This works around difficult-to-reproduce soft hangs on oversubscribed
runlists.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oak Zeng <Oak.Zeng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c
index 07f02f8..2d5ddf1 100644 (file)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c
@@ -134,6 +134,7 @@ static int pm_runlist_v9(struct packet_manager *pm, uint32_t *buffer,
        packet->bitfields4.ib_size = ib_size_in_dwords;
        packet->bitfields4.chain = chain ? 1 : 0;
        packet->bitfields4.offload_polling = 0;
+       packet->bitfields4.chained_runlist_idle_disable = chain ? 1 : 0;
        packet->bitfields4.valid = 1;
        packet->bitfields4.process_cnt = concurrent_proc_cnt;
        packet->ordinal2 = lower_32_bits(ib);