Re: [PATCH 2/6] usb: dwc3: omap: don't access DMA bits directly

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Grygorii Strashko <grygorii.strashko@xxxxxx> writes:
> On 04/05/2016 08:51 AM, Felipe Balbi wrote:
>> Grygorii Strashko <grygorii.strashko@xxxxxx> writes:
>>> On 04/02/2016 11:28 AM, Felipe Balbi wrote:
>>>> Instead of having a static global just for
>>>> initializing dma_mask directly, let's use
>>>> dma_coerce_mask_and_coherent() for that.
>>>>
>>>> Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
>>>> ---
>>>>    drivers/usb/dwc3/dwc3-omap.c | 4 +---
>>>>    1 file changed, 1 insertion(+), 3 deletions(-)
>>>>
>>>> diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
>>>> index 22e9606d8e08..c219118bfda0 100644
>>>> --- a/drivers/usb/dwc3/dwc3-omap.c
>>>> +++ b/drivers/usb/dwc3/dwc3-omap.c
>>>> @@ -331,8 +331,6 @@ static void dwc3_omap_disable_irqs(struct dwc3_omap *omap)
>>>>    	dwc3_omap_write_irqmisc_clr(omap, reg);
>>>>    }
>>>>    
>>>> -static u64 dwc3_omap_dma_mask = DMA_BIT_MASK(32);
>>>> -
>>>>    static int dwc3_omap_id_notifier(struct notifier_block *nb,
>>>>    	unsigned long event, void *ptr)
>>>>    {
>>>> @@ -490,7 +488,7 @@ static int dwc3_omap_probe(struct platform_device *pdev)
>>>>    	omap->irq	= irq;
>>>>    	omap->base	= base;
>>>>    	omap->vbus_reg	= vbus_reg;
>>>> -	dev->dma_mask	= &dwc3_omap_dma_mask;
>>>> +	dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
>>>
>>> I think, It'll be better to just remove DMA configuration code
>>> from this driver and other drivers which support DT-boot mode only.
>> 
>> I don't have HW, can you test that on AM57x and/or AM437x ?
>> 
>
> Yes. I can. With below change I see no issues with USB in Host mode
> on my AM57x board:

what about peripheral side ? Host mode worked fine on K2 devices, only
peripheral suffered from the bad DMA API usage.

-- 
balbi

Attachment: signature.asc
Description: PGP signature


[Index of Archives]     [Linux Arm (vger)]     [ARM Kernel]     [ARM MSM]     [Linux Tegra]     [Linux WPAN Networking]     [Linux Wireless Networking]     [Maemo Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux