linux-kernel - [PATCH v2 05/19] dmaengine: ti: k3-udma-glue: Configure the dma

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Date:   Tue, 17 Nov 2020 12:56:42 +0200
From:   Peter Ujfalusi <peter.ujfalusi@...com>
To:     <vkoul@...nel.org>, <nm@...com>, <ssantosh@...nel.org>,
        <robh+dt@...nel.org>
CC:     <dan.j.williams@...el.com>, <t-kristo@...com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <dmaengine@...r.kernel.org>, <vigneshr@...com>,
        <grygorii.strashko@...com>
Subject: [PATCH v2 05/19] dmaengine: ti: k3-udma-glue: Configure the dma_dev for rings

Rings in RING mode should be using the DMA device for DMA API as in this
mode the ringacc will not access the ring memory in any ways, but the DMA
is.

Fix up the ring configuration and set the dma_dev unconditionally and let
the ringacc driver to select the correct device to use for DMA API.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
---
 drivers/dma/ti/k3-udma-glue.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/dma/ti/k3-udma-glue.c b/drivers/dma/ti/k3-udma-glue.c
index 29d1524d1916..ddf0730aa2bc 100644
--- a/drivers/dma/ti/k3-udma-glue.c
+++ b/drivers/dma/ti/k3-udma-glue.c
@@ -280,6 +280,10 @@ struct k3_udma_glue_tx_channel *k3_udma_glue_request_tx_chn(struct device *dev,
 		goto err;
 	}
 
+	/* Set the dma_dev for the rings to be configured */
+	cfg->tx_cfg.dma_dev = k3_udma_glue_tx_get_dma_device(tx_chn);
+	cfg->txcq_cfg.dma_dev = cfg->tx_cfg.dma_dev;
+
 	ret = k3_ringacc_ring_cfg(tx_chn->ringtx, &cfg->tx_cfg);
 	if (ret) {
 		dev_err(dev, "Failed to cfg ringtx %d\n", ret);
@@ -595,6 +599,10 @@ static int k3_udma_glue_cfg_rx_flow(struct k3_udma_glue_rx_channel *rx_chn,
 		goto err_rflow_put;
 	}
 
+	/* Set the dma_dev for the rings to be configured */
+	flow_cfg->rx_cfg.dma_dev = k3_udma_glue_rx_get_dma_device(rx_chn);
+	flow_cfg->rxfdq_cfg.dma_dev = flow_cfg->rx_cfg.dma_dev;
+
 	ret = k3_ringacc_ring_cfg(flow->ringrx, &flow_cfg->rx_cfg);
 	if (ret) {
 		dev_err(dev, "Failed to cfg ringrx %d\n", ret);
-- 
Peter

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