[PATCH 5.10 421/717] dmaengine: ti: k3-udma: Correct normal channel offset when uchan_cnt is not 0

Greg Kroah-Hartman
2020-12-28T14:53:38Z

From: Peter Ujfalusi <peter.ujfalusi@ti.com>

[ Upstream commit e2de925bbfe321ba0588c99f577c59386ab1f428 ]

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>
Link: https://lore.kernel.org/r/20201208090440.31792-2-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/dma/ti/k3-udma.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 82cf6c77f5c93..d3902784cae24 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -3201,8 +3201,7 @@ 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);
--
2.27.0