Re: OMAP3530 EVM latest sources uploaded on linux.omap.com

[Felipe Balbi <me@felipebalbi.com>]

On Fri, Aug 15, 2008 at 07:50:07PM +0530, Syed Mohammed, Khasim wrote:
> Following shows an example of how to switch to DVI output and how to set the 720P mode on DVI and how to direct output of graphics to channel0.
> 
> echo DVI > /sys/class/display_control/omap_disp_control/ch0_output
> echo 720P > /sys/class/display_control/omap_disp_control/ch0_mode
> echo channel0 > /sys/class/display_control/omap_disp_control/graphics
> 
> This is new method of switching between DVI, LCD and S-Video with different modes associated with respective devices
> 
> Here we are treating each overlay as a channel. So there are two channels available. It creates four new attributes in sysfs, ch0_output, ch1_output, ch0_mode, ch1_mode. This sysfs attributes are setting/getting output device and modes on that channel. For channel-0, there are two possible outputs, LCD and DVI. Modes supported for DVI output are 720P and 480P and VGA for LCD output. Channel-1 supports SVIDEO as the output, which supports all NTSC and PAL modes. Application can write name of output device and mode to appropriate channels (overlay) to set them on that channel. Moreover, when we change the output of the channel, default mode on that output will be set by default. Each of the pipelines can be directed to either channel0 or channel1.
> 
> I will try to find out a user guide to share with all, should give more info per driver.

Cool, thanks for the info :-)

-- 
balbi