Re: Idea of a v4l - fb interface driver

2010-05-30 Thread Dave Airlie
On Sat, May 29, 2010 at 6:06 AM, Ville Syrjälä syrj...@sci.fi wrote: On Fri, May 28, 2010 at 03:41:46PM -0400, Alex Deucher wrote: On Fri, May 28, 2010 at 3:15 PM, Florian Tobias Schandinat If he wants different (independent) content on each output, just provide multiple /dev/fbX devices. I

Re: Idea of a v4l - fb interface driver

2010-05-28 Thread Guennadi Liakhovetski
On Thu, 27 May 2010, Alex Deucher wrote: On Thu, May 27, 2010 at 2:56 AM, Guennadi Liakhovetski g.liakhovet...@gmx.de wrote: ... Ok, let me explain what exactly I meant. Above I referred to display drivers, which is not the same as a framebuffer controller driver or whatever you would

Re: Idea of a v4l - fb interface driver

2010-05-28 Thread Guennadi Liakhovetski
(re-adding lists to CC) On Thu, 27 May 2010, Rob Clark wrote: Hi Guennadi, Sounds like an interesting idea... but how about the inverse? A v4l2 interface on top of fbdev. If v4l2 was more widely available as an output device, perhaps more userspace software would utilize it. Don't see

Re: Idea of a v4l - fb interface driver

2010-05-28 Thread Alex Deucher
On Fri, May 28, 2010 at 4:21 AM, Guennadi Liakhovetski g.liakhovet...@gmx.de wrote: On Thu, 27 May 2010, Alex Deucher wrote: On Thu, May 27, 2010 at 2:56 AM, Guennadi Liakhovetski g.liakhovet...@gmx.de wrote: ... Ok, let me explain what exactly I meant. Above I referred to display

Re: Idea of a v4l - fb interface driver

2010-05-28 Thread Florian Tobias Schandinat
Alex Deucher schrieb: On Fri, May 28, 2010 at 4:21 AM, Guennadi Liakhovetski g.liakhovet...@gmx.de wrote: On Thu, 27 May 2010, Alex Deucher wrote: Another API to consider in the drm kms (kernel modesetting) interface. The kms API deals properly with advanced display hardware and properly

Re: Idea of a v4l - fb interface driver

2010-05-28 Thread Guennadi Liakhovetski
On Fri, 28 May 2010, Florian Tobias Schandinat wrote: Well hiding complexity is actually the job of an API. I don't see any need for major changes in fbdev for complex display setups. In most cases as a userspace application you really don't want to be bothered how many different output

Re: Idea of a v4l - fb interface driver

2010-05-28 Thread Alex Deucher
On Fri, May 28, 2010 at 3:15 PM, Florian Tobias Schandinat florianschandi...@gmx.de wrote: Alex Deucher schrieb: On Fri, May 28, 2010 at 4:21 AM, Guennadi Liakhovetski g.liakhovet...@gmx.de wrote: On Thu, 27 May 2010, Alex Deucher wrote: Another API to consider in the drm kms (kernel

Re: Idea of a v4l - fb interface driver

2010-05-28 Thread Florian Tobias Schandinat
Guennadi Liakhovetski schrieb: On Fri, 28 May 2010, Florian Tobias Schandinat wrote: Well hiding complexity is actually the job of an API. I don't see any need for major changes in fbdev for complex display setups. In most cases as a userspace application you really don't want to be bothered

Re: Idea of a v4l - fb interface driver

2010-05-28 Thread Ville Syrjälä
On Fri, May 28, 2010 at 03:41:46PM -0400, Alex Deucher wrote: On Fri, May 28, 2010 at 3:15 PM, Florian Tobias Schandinat If he wants different (independent) content on each output, just provide multiple /dev/fbX devices. I admit that we could use a controlling interface here that decides

RE: Idea of a v4l - fb interface driver

2010-05-27 Thread Hiremath, Vaibhav
-Original Message- From: linux-fbdev-ow...@vger.kernel.org [mailto:linux-fbdev- ow...@vger.kernel.org] On Behalf Of Guennadi Liakhovetski Sent: Wednesday, May 26, 2010 7:40 PM To: linux-fb...@vger.kernel.org Subject: Idea of a v4l - fb interface driver This message has been

Re: Idea of a v4l - fb interface driver

2010-05-27 Thread Guennadi Liakhovetski
(adding V4L ML to CC and preserving the complete reply for V4L readers) On Thu, 27 May 2010, Jaya Kumar wrote: On Wed, May 26, 2010 at 10:09 PM, Guennadi Liakhovetski g.liakhovet...@gmx.de wrote: Problem: Currently the standard way to provide graphical output on various (embedded) displays

RE: Idea of a v4l - fb interface driver

2010-05-27 Thread Guennadi Liakhovetski
On Thu, 27 May 2010, Hiremath, Vaibhav wrote: OTOH V4L2 has a standard video output driver support, it is not very widely used, in the userspace I know only of gstreamer, that somehow supports video-output v4l2 devices in latest versions. But, being a part of the v4l2 subsystem, these

Re: Idea of a v4l - fb interface driver

2010-05-27 Thread Jaya Kumar
On Thu, May 27, 2010 at 2:56 PM, Guennadi Liakhovetski g.liakhovet...@gmx.de wrote: (adding V4L ML to CC and preserving the complete reply for V4L readers) On Thu, 27 May 2010, Jaya Kumar wrote: On Wed, May 26, 2010 at 10:09 PM, Guennadi Liakhovetski g.liakhovet...@gmx.de wrote: Ok, let me

Re: Idea of a v4l - fb interface driver

2010-05-27 Thread Guennadi Liakhovetski
On Thu, 27 May 2010, Jaya Kumar wrote: You've raised the MIPI-DSI issue. It is a good area to focus the discussion on for fbdev minded people and one that needs to be resolved soon so that we don't get dozens of host controller specific mipi display panel drivers. I had seen that omap2 fbdev

Re: Idea of a v4l - fb interface driver

2010-05-27 Thread Udo Richter
Am 27.05.2010 08:44, schrieb Hiremath, Vaibhav: V4L(2) video output vs. framebuffer. Problem: Currently the standard way to provide graphical output on various (embedded) displays like LCDs is to use a framebuffer driver. The interface is well supported and widely adopted in the

Re: Idea of a v4l - fb interface driver

2010-05-27 Thread Alex Deucher
On Thu, May 27, 2010 at 2:56 AM, Guennadi Liakhovetski g.liakhovet...@gmx.de wrote: (adding V4L ML to CC and preserving the complete reply for V4L readers) On Thu, 27 May 2010, Jaya Kumar wrote: On Wed, May 26, 2010 at 10:09 PM, Guennadi Liakhovetski g.liakhovet...@gmx.de wrote: Problem: