dma: ti: k3-udma: Use ring_idx to pair k3 nav rings

Use ring_idx to pair rings. ring_idx will be same as tx flow_id for all
non-negative flow_ids. For negative flow_ids, ring_idx will be tchan->id
added with bchan_cnt.

Signed-off-by: MD Danish Anwar <danishanwar@ti.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index a018f70c545..bdaadc9e780 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -875,13 +875,20 @@ static int udma_alloc_tx_resources(struct udma_chan *uc)
 {
         struct k3_nav_ring_cfg ring_cfg;
         struct udma_dev *ud = uc->ud;
-        int ret;
+        struct udma_tchan *tchan;
+        int ring_idx, ret;
 
         ret = udma_get_tchan(uc);
         if (ret)
                 return ret;
 
-        ret = k3_nav_ringacc_request_rings_pair(ud->ringacc, uc->tchan->id, -1,
+        tchan = uc->tchan;
+        if (tchan->tflow_id >= 0)
+                ring_idx = tchan->tflow_id;
+        else
+                ring_idx = ud->bchan_cnt + tchan->id;
+
+        ret = k3_nav_ringacc_request_rings_pair(ud->ringacc, ring_idx, -1,
                                                 &uc->tchan->t_ring,
                                                 &uc->tchan->tc_ring);
         if (ret) {