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From: Juergen Borleis <jbe@pengutronix.de>
To: dmaengine@vger.kernel.org
Cc: linux-imx@nxp.com, festevam@gmail.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, shawnguo@kernel.org,
	vkoul@kernel.org, kernel@pengutronix.de
Subject: [PATCH] dma: imx-dma: configure the generic DMA type to make it work
Date: Thu, 29 Jul 2021 09:18:21 +0200	[thread overview]
Message-ID: <20210729071821.9857-1-jbe@pengutronix.de> (raw)

Commit dea7a9f
  dmaengine: imx-dma: remove dma_slave_config direction usage

changes the method from a "configuration when called" to an "configuration
when used". Due to this, only the cyclic DMA type gets configured
correctly, while the generic DMA type is left non-configured.

Without this additional call, the struct imxdma_channel::word_size member
is stuck at DMA_SLAVE_BUSWIDTH_UNDEFINED and imxdma_prep_slave_sg() always
returns NULL.

Signed-off-by: Juergen Borleis <jbe@pengutronix.de>
---
 drivers/dma/imx-dma.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index 7f116bb..2ddc31e 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -812,6 +812,8 @@ static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
 		dma_length += sg_dma_len(sg);
 	}
 
+	imxdma_config_write(chan, &imxdmac->config, direction);
+
 	switch (imxdmac->word_size) {
 	case DMA_SLAVE_BUSWIDTH_4_BYTES:
 		if (sg_dma_len(sgl) & 3 || sgl->dma_address & 3)
-- 
2.20.1


WARNING: multiple messages have this Message-ID (diff)
From: Juergen Borleis <jbe@pengutronix.de>
To: dmaengine@vger.kernel.org
Cc: linux-imx@nxp.com, festevam@gmail.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, shawnguo@kernel.org,
	vkoul@kernel.org, kernel@pengutronix.de
Subject: [PATCH] dma: imx-dma: configure the generic DMA type to make it work
Date: Thu, 29 Jul 2021 09:18:21 +0200	[thread overview]
Message-ID: <20210729071821.9857-1-jbe@pengutronix.de> (raw)

Commit dea7a9f
  dmaengine: imx-dma: remove dma_slave_config direction usage

changes the method from a "configuration when called" to an "configuration
when used". Due to this, only the cyclic DMA type gets configured
correctly, while the generic DMA type is left non-configured.

Without this additional call, the struct imxdma_channel::word_size member
is stuck at DMA_SLAVE_BUSWIDTH_UNDEFINED and imxdma_prep_slave_sg() always
returns NULL.

Signed-off-by: Juergen Borleis <jbe@pengutronix.de>
---
 drivers/dma/imx-dma.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index 7f116bb..2ddc31e 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -812,6 +812,8 @@ static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
 		dma_length += sg_dma_len(sg);
 	}
 
+	imxdma_config_write(chan, &imxdmac->config, direction);
+
 	switch (imxdmac->word_size) {
 	case DMA_SLAVE_BUSWIDTH_4_BYTES:
 		if (sg_dma_len(sgl) & 3 || sgl->dma_address & 3)
-- 
2.20.1


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             reply	other threads:[~2021-07-29  7:18 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-29  7:18 Juergen Borleis [this message]
2021-07-29  7:18 ` [PATCH] dma: imx-dma: configure the generic DMA type to make it work Juergen Borleis
2021-08-02  7:03 ` Vinod Koul
2021-08-02  7:03   ` Vinod Koul

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