diff mbox series

[v4,4/4] dmaengine: mediatek-cqdma: add dma mask for capability

Message ID 1590659832-31476-5-git-send-email-EastL.Lee@mediatek.com (mailing list archive)
State New, archived
Headers show
Series [v4,1/4] dt-bindings: dmaengine: Add MediaTek Command-Queue DMA controller bindings | expand

Commit Message

EastL Lee May 28, 2020, 9:57 a.m. UTC 
This patch add dma mask for capability.

Change-Id: I31f4622f9541d769702029532e5f5f185815dda2
Signed-off-by: EastL <EastL.Lee@mediatek.com>
---
 drivers/dma/mediatek/mtk-cqdma.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

Comments

Matthias Brugger May 28, 2020, 2:10 p.m. UTC | #1 
On 28/05/2020 11:57, EastL wrote:
> This patch add dma mask for capability.
> 
> Change-Id: I31f4622f9541d769702029532e5f5f185815dda2

No Change-Id in the commit message please.

> Signed-off-by: EastL <EastL.Lee@mediatek.com>
> ---
>  drivers/dma/mediatek/mtk-cqdma.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/dma/mediatek/mtk-cqdma.c b/drivers/dma/mediatek/mtk-cqdma.c
> index bca7118..1805a76 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;
>  };
> @@ -549,6 +551,7 @@ static void mtk_cqdma_hw_deinit(struct mtk_cqdma_device *cqdma)
>  };
>  MODULE_DEVICE_TABLE(of, mtk_cqdma_match);
>  
> +static u64 cqdma_dmamask;
>  static int mtk_cqdma_probe(struct platform_device *pdev)
>  {
>  	struct mtk_cqdma_device *cqdma;
> @@ -607,6 +610,16 @@ static int mtk_cqdma_probe(struct platform_device *pdev)
>  		cqdma->dma_channels = MTK_CQDMA_NR_PCHANS;
>  	}
>  
> +	if (pdev->dev.of_node && of_property_read_u32(pdev->dev.of_node,
> +						      "dma-channel-mask",
> +						      &cqdma->dma_mask)) {

I'd prefer:

if (pdev->dev.of_node)
    ret = of_property_read_u32(pdev->dev.of_node,
                               "dma-channel-mask",
                               &cqdma->dma_mask))
if (ret) {
    dev_warn(&pdev->dev,
             "Using 0 as missing dma-channel-mask
              property\n");
    cqdma->dma_mask = 0;
}

> +		dev_info(&pdev->dev,
> +			 "Using 0 as missing dma-channel-mask property\n");

dev_warn should be OK.

> +	} else {
> +		cqdma_dmamask = DMA_BIT_MASK(cqdma->dma_mask);
> +		pdev->dev.dma_mask = &cqdma_dmamask;

if (dma_set_mask(&pdev->dev,
    DMA_BIT_MASK(cqdma->dma_mask)) {
         /* error out */
}

> +	}
> +
>  	cqdma->pc = devm_kcalloc(&pdev->dev, cqdma->dma_channels,
>  				 sizeof(*cqdma->pc), GFP_KERNEL);
>  	if (!cqdma->pc)
>
EastL Lee June 12, 2020, 8:13 a.m. UTC | #2 
On Thu, 2020-05-28 at 16:10 +0200, Matthias Brugger wrote:
> 
> On 28/05/2020 11:57, EastL wrote:
> > This patch add dma mask for capability.
> > 
> > Change-Id: I31f4622f9541d769702029532e5f5f185815dda2
> 
> No Change-Id in the commit message please.
> 
> > Signed-off-by: EastL <EastL.Lee@mediatek.com>
> > ---
> >  drivers/dma/mediatek/mtk-cqdma.c | 13 +++++++++++++
> >  1 file changed, 13 insertions(+)
> > 
> > diff --git a/drivers/dma/mediatek/mtk-cqdma.c b/drivers/dma/mediatek/mtk-cqdma.c
> > index bca7118..1805a76 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;
> >  };
> > @@ -549,6 +551,7 @@ static void mtk_cqdma_hw_deinit(struct mtk_cqdma_device *cqdma)
> >  };
> >  MODULE_DEVICE_TABLE(of, mtk_cqdma_match);
> >  
> > +static u64 cqdma_dmamask;
> >  static int mtk_cqdma_probe(struct platform_device *pdev)
> >  {
> >  	struct mtk_cqdma_device *cqdma;
> > @@ -607,6 +610,16 @@ static int mtk_cqdma_probe(struct platform_device *pdev)
> >  		cqdma->dma_channels = MTK_CQDMA_NR_PCHANS;
> >  	}
> >  
> > +	if (pdev->dev.of_node && of_property_read_u32(pdev->dev.of_node,
> > +						      "dma-channel-mask",
> > +						      &cqdma->dma_mask)) {
> 
> I'd prefer:
> 
> if (pdev->dev.of_node)
>     ret = of_property_read_u32(pdev->dev.of_node,
>                                "dma-channel-mask",
>                                &cqdma->dma_mask))
> if (ret) {
>     dev_warn(&pdev->dev,
>              "Using 0 as missing dma-channel-mask
>               property\n");
>     cqdma->dma_mask = 0;
> }
> 
> > +		dev_info(&pdev->dev,
> > +			 "Using 0 as missing dma-channel-mask property\n");
> 
> dev_warn should be OK.
> 
> > +	} else {
> > +		cqdma_dmamask = DMA_BIT_MASK(cqdma->dma_mask);
> > +		pdev->dev.dma_mask = &cqdma_dmamask;
> 
> if (dma_set_mask(&pdev->dev,
>     DMA_BIT_MASK(cqdma->dma_mask)) {
>          /* error out */
> }
> 
OK, I'll fix it on next version.

> > +	}
> > +
> >  	cqdma->pc = devm_kcalloc(&pdev->dev, cqdma->dma_channels,
> >  				 sizeof(*cqdma->pc), GFP_KERNEL);
> >  	if (!cqdma->pc)
> >
diff mbox series

Patch

diff --git a/drivers/dma/mediatek/mtk-cqdma.c b/drivers/dma/mediatek/mtk-cqdma.c
index bca7118..1805a76 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;
 };
@@ -549,6 +551,7 @@  static void mtk_cqdma_hw_deinit(struct mtk_cqdma_device *cqdma)
 };
 MODULE_DEVICE_TABLE(of, mtk_cqdma_match);
 
+static u64 cqdma_dmamask;
 static int mtk_cqdma_probe(struct platform_device *pdev)
 {
 	struct mtk_cqdma_device *cqdma;
@@ -607,6 +610,16 @@  static int mtk_cqdma_probe(struct platform_device *pdev)
 		cqdma->dma_channels = MTK_CQDMA_NR_PCHANS;
 	}
 
+	if (pdev->dev.of_node && of_property_read_u32(pdev->dev.of_node,
+						      "dma-channel-mask",
+						      &cqdma->dma_mask)) {
+		dev_info(&pdev->dev,
+			 "Using 0 as missing dma-channel-mask property\n");
+	} else {
+		cqdma_dmamask = DMA_BIT_MASK(cqdma->dma_mask);
+		pdev->dev.dma_mask = &cqdma_dmamask;
+	}
+
 	cqdma->pc = devm_kcalloc(&pdev->dev, cqdma->dma_channels,
 				 sizeof(*cqdma->pc), GFP_KERNEL);
 	if (!cqdma->pc)