Re: [PATCH] dma-buf: Update docs for SYNC ioctl

2016-03-29 Thread David Herrmann
Hi On Mon, Mar 28, 2016 at 9:42 PM, Tiago Vignatti wrote: > Do we have an agreement here after all? David? I need to know whether this > fixup is okay to go cause I'll need to submit to Chrome OS then. Sure it is fine. The code is already there, we cannot change it. Thanks David -- To unsubscri

Re: [PATCH] dma-buf: Update docs for SYNC ioctl

2016-03-23 Thread David Herrmann
Hi On Wed, Mar 23, 2016 at 12:56 PM, Chris Wilson wrote: > On Wed, Mar 23, 2016 at 12:30:42PM +0100, David Herrmann wrote: >> My question was rather about why we do this? Semantics for EINTR are >> well defined, and with SA_RESTART (default on linux) user-space can >> ignore

Re: [PATCH] dma-buf: Update docs for SYNC ioctl

2016-03-23 Thread David Herrmann
Hey On Mon, Mar 21, 2016 at 6:14 PM, Daniel Vetter wrote: > On Mon, Mar 21, 2016 at 01:26:58PM +0100, David Herrmann wrote: >> Hi >> >> On Mon, Mar 21, 2016 at 8:51 AM, Daniel Vetter >> wrote: >> > Just a bit of wording polish plus mentioning that it

Re: [PATCH] dma-buf: Update docs for SYNC ioctl

2016-03-21 Thread David Herrmann
Hi On Mon, Mar 21, 2016 at 8:51 AM, Daniel Vetter wrote: > Just a bit of wording polish plus mentioning that it can fail and must > be restarted. > > Requested by Sumit. > > v2: Fix them typos (Hans). > > Cc: Chris Wilson > Cc: Tiago Vignatti > Cc: Stéphane M

Re: [PATCH v2 2/2] dma-buf: Add user interfaces for dmabuf sync support

2013-08-21 Thread David Herrmann
Hi On Wed, Aug 21, 2013 at 12:33 PM, Inki Dae wrote: > This patch adds lock and poll callbacks to dma buf file operations, > and these callbacks will be called by fcntl and select system calls. > > fcntl and select system calls can be used to wait for the completion > of DMA or CPU access to a sh

Re: dma-buf/fbdev: one-to-many support

2012-07-17 Thread David Herrmann
Hi Laurent and Alan On Tue, Jul 17, 2012 at 1:24 PM, Alan Cox wrote: >> The main issue is that fbdev has been designed with the implicit assumption >> that an fbdev driver will always own the graphics memory it uses. All >> components in the stack, from drivers to applications, have been designed

dma-buf/fbdev: one-to-many support

2012-07-14 Thread David Herrmann
Hi I am currently working on fblog [1] (a replacement for fbcon without VT dependencies) but this questions does also apply to other fbdev users. Is there a way to share framebuffers between fbdev devices? I was thinking especially of USB devices like DisplayLink. If they share the same screen dim