Hi Rob,
On Thu, Oct 24, 2019 at 03:02:57PM +0800, CK Hu wrote:
> On Wed, 2019-10-23 at 17:56 -0500, Rob Herring wrote:
> > On Wed, Oct 23, 2019 at 4:06 PM CK Hu wrote:
> > > On Wed, 2019-10-23 at 12:42 -0500, Rob Herring wrote:
> > > > On Tue, Oct 22, 2019 at 12:07 PM Matthias Brugger wrote:
> >
Hi, Rob:
On Wed, 2019-10-23 at 17:56 -0500, Rob Herring wrote:
> On Wed, Oct 23, 2019 at 4:06 PM CK Hu wrote:
> >
> > Hi, Rob:
> >
> > On Wed, 2019-10-23 at 12:42 -0500, Rob Herring wrote:
> > > On Tue, Oct 22, 2019 at 12:07 PM Matthias Brugger
> > > wrote:
> > > >
> > > > Hi Rob,
> > > >
> > >
On Wed, Oct 23, 2019 at 4:06 PM CK Hu wrote:
>
> Hi, Rob:
>
> On Wed, 2019-10-23 at 12:42 -0500, Rob Herring wrote:
> > On Tue, Oct 22, 2019 at 12:07 PM Matthias Brugger
> > wrote:
> > >
> > > Hi Rob,
> > >
> > > On 21/10/2019 23:45, Rob Herring wrote:
> > > > The only reason the Mediatek driver
Hi, Rob:
On Wed, 2019-10-23 at 12:42 -0500, Rob Herring wrote:
> On Tue, Oct 22, 2019 at 12:07 PM Matthias Brugger
> wrote:
> >
> > Hi Rob,
> >
> > On 21/10/2019 23:45, Rob Herring wrote:
> > > The only reason the Mediatek driver doesn't use the CMA helpers is it
> > > sets
On Tue, Oct 22, 2019 at 12:07 PM Matthias Brugger
wrote:
>
> Hi Rob,
>
> On 21/10/2019 23:45, Rob Herring wrote:
> > The only reason the Mediatek driver doesn't use the CMA helpers is it
> > sets DMA_ATTR_NO_KERNEL_MAPPING and does a vmap() on demand. Using
> > vmap() is not even guaranteed to
Hi Rob,
On 21/10/2019 23:45, Rob Herring wrote:
> The only reason the Mediatek driver doesn't use the CMA helpers is it
> sets DMA_ATTR_NO_KERNEL_MAPPING and does a vmap() on demand. Using
> vmap() is not even guaranteed to work as DMA buffers may not have a
> struct page. Now that the CMA
The only reason the Mediatek driver doesn't use the CMA helpers is it
sets DMA_ATTR_NO_KERNEL_MAPPING and does a vmap() on demand. Using
vmap() is not even guaranteed to work as DMA buffers may not have a
struct page. Now that the CMA helpers support setting
DMA_ATTR_NO_KERNEL_MAPPING as needed or
