[Linaro-mm-sig] [PATCH] dma-buf: add vmap interface (v2)

2012-05-18 Thread Sumit Semwal
Hi Dave, On 17 May 2012 16:01, Dave Airlie wrote: > From: Dave Airlie > > The main requirement I have for this interface is for scanning out > using the USB gpu devices. Since these devices have to read the > framebuffer on updates and linearly compress it, using kmaps > is a major overhead for

Re: [Linaro-mm-sig] [PATCH] dma-buf: add vmap interface (v2)

2012-05-17 Thread Sumit Semwal
Hi Dave, On 17 May 2012 16:01, Dave Airlie wrote: > From: Dave Airlie > > The main requirement I have for this interface is for scanning out > using the USB gpu devices. Since these devices have to read the > framebuffer on updates and linearly compress it, using kmaps > is a major overhead for

[PATCH] dma-buf: add vmap interface (v2)

2012-05-17 Thread Marcin Slusarz
On Thu, May 17, 2012 at 06:32:19AM -0600, Rob Clark wrote: > On Thu, May 17, 2012 at 4:31 AM, Dave Airlie wrote: > > From: Dave Airlie > > > > The main requirement I have for this interface is for scanning out > > using the USB gpu devices. Since these devices have to read the > > framebuffer on

[PATCH] dma-buf: add vmap interface (v2)

2012-05-17 Thread Dave Airlie
On Thu, May 17, 2012 at 1:32 PM, Rob Clark wrote: > On Thu, May 17, 2012 at 4:31 AM, Dave Airlie wrote: >> From: Dave Airlie >> >> The main requirement I have for this interface is for scanning out >> using the USB gpu devices. Since these devices have to read the >> framebuffer on updates and l

[PATCH] dma-buf: add vmap interface (v2)

2012-05-17 Thread Dave Airlie
From: Dave Airlie The main requirement I have for this interface is for scanning out using the USB gpu devices. Since these devices have to read the framebuffer on updates and linearly compress it, using kmaps is a major overhead for every update. v2: fix warn issues pointed out by Sylwester Naw

Re: [PATCH] dma-buf: add vmap interface (v2)

2012-05-17 Thread Marcin Slusarz
On Thu, May 17, 2012 at 06:32:19AM -0600, Rob Clark wrote: > On Thu, May 17, 2012 at 4:31 AM, Dave Airlie wrote: > > From: Dave Airlie > > > > The main requirement I have for this interface is for scanning out > > using the USB gpu devices. Since these devices have to read the > > framebuffer on

[PATCH] dma-buf: add vmap interface (v2)

2012-05-17 Thread Rob Clark
On Thu, May 17, 2012 at 4:31 AM, Dave Airlie wrote: > From: Dave Airlie > > The main requirement I have for this interface is for scanning out > using the USB gpu devices. Since these devices have to read the > framebuffer on updates and linearly compress it, using kmaps > is a major overhead for

Re: [PATCH] dma-buf: add vmap interface (v2)

2012-05-17 Thread Dave Airlie
On Thu, May 17, 2012 at 1:32 PM, Rob Clark wrote: > On Thu, May 17, 2012 at 4:31 AM, Dave Airlie wrote: >> From: Dave Airlie >> >> The main requirement I have for this interface is for scanning out >> using the USB gpu devices. Since these devices have to read the >> framebuffer on updates and l

Re: [PATCH] dma-buf: add vmap interface (v2)

2012-05-17 Thread Rob Clark
On Thu, May 17, 2012 at 4:31 AM, Dave Airlie wrote: > From: Dave Airlie > > The main requirement I have for this interface is for scanning out > using the USB gpu devices. Since these devices have to read the > framebuffer on updates and linearly compress it, using kmaps > is a major overhead for

[PATCH] dma-buf: add vmap interface (v2)

2012-05-17 Thread Dave Airlie
From: Dave Airlie The main requirement I have for this interface is for scanning out using the USB gpu devices. Since these devices have to read the framebuffer on updates and linearly compress it, using kmaps is a major overhead for every update. v2: fix warn issues pointed out by Sylwester Naw