All of lore.kernel.org
 help / color / mirror / Atom feed
From: Vignesh Raghavendra <vigneshr@ti.com>
To: Peter Ujfalusi <peter.ujfalusi@gmail.com>, Vinod Koul <vkoul@kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>,
	<dmaengine@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	Vignesh Raghavendra <vigneshr@ti.com>
Subject: [PATCH] dmaengine: ti: k3-udma: Set rflow count for BCDMA split channels
Date: Tue, 12 Jan 2021 19:44:03 +0530	[thread overview]
Message-ID: <20210112141403.30286-1-vigneshr@ti.com> (raw)

BCDMA RX channels have one flow per channel, therefore set the rflow_cnt
to rchan_cnt.

Without this patch, request for BCDMA RX channel allocation fails as
rflow_cnt is 0 thus fails to reserve a rflow for the channel.

Fixes: 8844898028d4 ("dmaengine: ti: k3-udma: Add support for BCDMA channel TPL handling")
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---
 drivers/dma/ti/k3-udma.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 298460438bb4..a1af59d901be 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -4305,6 +4305,7 @@ static int udma_get_mmrs(struct platform_device *pdev, struct udma_dev *ud)
 		ud->bchan_cnt = BCDMA_CAP2_BCHAN_CNT(cap2);
 		ud->tchan_cnt = BCDMA_CAP2_TCHAN_CNT(cap2);
 		ud->rchan_cnt = BCDMA_CAP2_RCHAN_CNT(cap2);
+		ud->rflow_cnt = ud->rchan_cnt;
 		break;
 	case DMA_TYPE_PKTDMA:
 		cap4 = udma_read(ud->mmrs[MMR_GCFG], 0x30);
-- 
2.30.0


             reply	other threads:[~2021-01-12 14:15 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-12 14:14 Vignesh Raghavendra [this message]
2021-01-12 18:29 ` [PATCH] dmaengine: ti: k3-udma: Set rflow count for BCDMA split channels Péter Ujfalusi

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210112141403.30286-1-vigneshr@ti.com \
    --to=vigneshr@ti.com \
    --cc=dan.j.williams@intel.com \
    --cc=dmaengine@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=peter.ujfalusi@gmail.com \
    --cc=vkoul@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.