This is a note to let you know that I've just added the patch titled
dmaengine: ti: k3-udma: Fix BCHAN count with UHC and HC channels
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dmaengine-ti-k3-udma-fix-bchan-count-with-uhc-and-hc.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit edb4fe32f4f817468e5745f759d49d15d07d2a03
Author: Vignesh Raghavendra <vigneshr@xxxxxx>
Date: Fri Jun 7 23:41:03 2024 +0530
dmaengine: ti: k3-udma: Fix BCHAN count with UHC and HC channels
[ Upstream commit 372f8b3621294173f539b32976e41e6e12f5decf ]
Unlike other channel counts in CAPx registers, BCDMA BCHAN CNT doesn't
include UHC and HC BC channels. So include them explicitly to arrive at
total BC channel in the instance.
Fixes: 8844898028d4 ("dmaengine: ti: k3-udma: Add support for BCDMA channel TPL handling")
Signed-off-by: Vignesh Raghavendra <vigneshr@xxxxxx>
Signed-off-by: Jai Luthra <j-luthra@xxxxxx>
Tested-by: Jayesh Choudhary <j-choudhary@xxxxxx>
Link: https://lore.kernel.org/r/20240607-bcdma_chan_cnt-v2-1-bf1a55529d91@xxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 037f1408e7983..02a1ab04f498e 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -4470,7 +4470,9 @@ static int udma_get_mmrs(struct platform_device *pdev, struct udma_dev *ud)
ud->rchan_cnt = UDMA_CAP2_RCHAN_CNT(cap2);
break;
case DMA_TYPE_BCDMA:
- ud->bchan_cnt = BCDMA_CAP2_BCHAN_CNT(cap2);
+ ud->bchan_cnt = BCDMA_CAP2_BCHAN_CNT(cap2) +
+ BCDMA_CAP3_HBCHAN_CNT(cap3) +
+ BCDMA_CAP3_UBCHAN_CNT(cap3);
ud->tchan_cnt = BCDMA_CAP2_TCHAN_CNT(cap2);
ud->rchan_cnt = BCDMA_CAP2_RCHAN_CNT(cap2);
ud->rflow_cnt = ud->rchan_cnt;
