From: EastL Lee <EastL.Lee@mediatek.com>
To: Sean Wang <sean.wang@mediatek.com>
Cc: <vkoul@kernel.org>, <robh+dt@kernel.org>, <mark.rutland@arm.com>,
<matthias.bgg@gmail.com>, <dmaengine@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<devicetree@vger.kernel.org>, <wsd_upstream@mediatek.com>,
<cc.hwang@mediatek.com>, EastL Lee <EastL.Lee@mediatek.com>
Subject: [PATCH v7 3/4] dmaengine: mediatek-cqdma: add dma mask for capability
Date: Tue, 18 Aug 2020 11:03:53 +0800 [thread overview]
Message-ID: <1597719834-6675-4-git-send-email-EastL.Lee@mediatek.com> (raw)
In-Reply-To: <1597719834-6675-1-git-send-email-EastL.Lee@mediatek.com>
This patch add dma mask for capability.
Signed-off-by: EastL Lee <EastL.Lee@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
---
drivers/dma/mediatek/mtk-cqdma.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/dma/mediatek/mtk-cqdma.c b/drivers/dma/mediatek/mtk-cqdma.c
index 905bbcb..1610632 100644
--- a/drivers/dma/mediatek/mtk-cqdma.c
+++ b/drivers/dma/mediatek/mtk-cqdma.c
@@ -117,6 +117,7 @@ struct mtk_cqdma_vchan {
* @clk: The clock that device internal is using
* @dma_requests: The number of VCs the device supports to
* @dma_channels: The number of PCs the device supports to
+ * @dma_mask: A mask for DMA capability
* @vc: The pointer to all available VCs
* @pc: The pointer to all the underlying PCs
*/
@@ -126,6 +127,7 @@ struct mtk_cqdma_device {
u32 dma_requests;
u32 dma_channels;
+ u32 dma_mask;
struct mtk_cqdma_vchan *vc;
struct mtk_cqdma_pchan **pc;
};
@@ -607,6 +609,21 @@ static int mtk_cqdma_probe(struct platform_device *pdev)
cqdma->dma_channels = MTK_CQDMA_NR_PCHANS;
}
+ if (pdev->dev.of_node)
+ err = of_property_read_u32(pdev->dev.of_node,
+ "dma-channel-mask",
+ &cqdma->dma_mask);
+ if (err) {
+ dev_warn(&pdev->dev,
+ "Using 0 as missing dma-channel-mask property\n");
+ cqdma->dma_mask = 0;
+ }
+
+ if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(cqdma->dma_mask))) {
+ dev_warn(&pdev->dev, "DMA set mask failed\n");
+ return -EINVAL;
+ }
+
cqdma->pc = devm_kcalloc(&pdev->dev, cqdma->dma_channels,
sizeof(*cqdma->pc), GFP_KERNEL);
if (!cqdma->pc)
--
1.9.1
next prev parent reply other threads:[~2020-08-18 3:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-18 3:03 [PATCH v7] dmaengine: mediatek-cqdma: add dt-bindings and remove redundant queue EastL Lee
2020-08-18 3:03 ` [PATCH v7 1/4] dt-bindings: dmaengine: Add MediaTek Command-Queue DMA controller bindings EastL Lee
2020-08-18 16:43 ` Rob Herring
2020-08-18 16:47 ` Rob Herring
2020-12-04 7:17 ` EastL
2020-08-18 3:03 ` [PATCH v7 2/4] dmaengine: mediatek-cqdma: remove redundant queue structure EastL Lee
2020-08-18 3:03 ` EastL Lee [this message]
2020-08-18 3:03 ` [PATCH v7 4/4] dmaengine: mediatek-cqdma: fix compatible EastL Lee
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