[v3,01/20] dmaengine: ti: k3-udma: Correct normal channel offset when uchan_cnt is not 0

Message ID 20201208090440.31792-2-peter.ujfalusi@ti.com
State Accepted
Commit e2de925bbfe321ba0588c99f577c59386ab1f428
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Series
  • dmaengine/soc: k3-udma: Add support for BCDMA and PKTDMA
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Commit Message

Peter Ujfalusi Dec. 8, 2020, 9:04 a.m.
According to different sections of the TRM, the hchan_cnt of CAP3 includes
the number of uchan in UDMA, thus the start offset of the normal channels
are hchan_cnt.

Fixes: daf4ad0499aa4 ("dmaengine: ti: k3-udma: Query throughput level information from hardware")
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

---
 drivers/dma/ti/k3-udma.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

Patch

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index e508280b3d70..0e8426dd18a7 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -3199,8 +3199,7 @@  static int udma_setup_resources(struct udma_dev *ud)
 	} else if (UDMA_CAP3_UCHAN_CNT(cap3)) {
 		ud->tpl_levels = 3;
 		ud->tpl_start_idx[1] = UDMA_CAP3_UCHAN_CNT(cap3);
-		ud->tpl_start_idx[0] = ud->tpl_start_idx[1] +
-				       UDMA_CAP3_HCHAN_CNT(cap3);
+		ud->tpl_start_idx[0] = UDMA_CAP3_HCHAN_CNT(cap3);
 	} else if (UDMA_CAP3_HCHAN_CNT(cap3)) {
 		ud->tpl_levels = 2;
 		ud->tpl_start_idx[0] = UDMA_CAP3_HCHAN_CNT(cap3);