| Message ID | 1390935213-12896-3-git-send-email-valentine.barshak@cogentembedded.com (mailing list archive) |
|---|---|
| State | RFC |
| Headers | show |
On 28/01/14 18:53, Valentine Barshak wrote: > This increases the size of ARM coherent DMA pool to 4MB to > avoid issues with DMA bounce for PCI DMA transfers. Would it be easier to enable CMA support given that the DU driver really needs it.
On 01/29/2014 01:07 PM, Ben Dooks wrote: > On 28/01/14 18:53, Valentine Barshak wrote: >> This increases the size of ARM coherent DMA pool to 4MB to >> avoid issues with DMA bounce for PCI DMA transfers. > > Would it be easier to enable CMA support given that the DU > driver really needs it. > It doesn't help since dmabounce driver does not allocate bounce buffers from CMA. Thanks, Val. -- To unsubscribe from this list: send the line "unsubscribe linux-sh" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/arm/boot/dts/r8a7790-lager.dts b/arch/arm/boot/dts/r8a7790-lager.dts index 1081c5e..b2cac57 100644 --- a/arch/arm/boot/dts/r8a7790-lager.dts +++ b/arch/arm/boot/dts/r8a7790-lager.dts @@ -17,7 +17,7 @@ compatible = "renesas,lager", "renesas,r8a7790"; chosen { - bootargs = "console=ttySC6,115200 ignore_loglevel rw root=/dev/nfs ip=dhcp"; + bootargs = "console=ttySC6,115200 ignore_loglevel rw root=/dev/nfs ip=dhcp coherent_pool=4M"; }; memory@40000000 {
This increases the size of ARM coherent DMA pool to 4MB to avoid issues with DMA bounce for PCI DMA transfers. Signed-off-by: Valentine Barshak <valentine.barshak@cogentembedded.com> --- arch/arm/boot/dts/r8a7790-lager.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)