[RFC PATCH v2 01/15] dma: ti: k3-udma: Use ring_idx to pair k3 nav rings

[MD Danish Anwar]

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 <danishan...@ti.com>
---
 drivers/dma/ti/k3-udma.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 8a62d63dfe..eea9ec9659 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -876,13 +876,20 @@ 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) {
-- 
2.34.1