HDMI and interrupt GPIO1_25

44 views
Skip to first unread message

Micka

unread,
Jun 23, 2016, 3:25:16 AM6/23/16
to beagl...@googlegroups.com, Robert Nelson
Hi, 

When Gerald Coley design the BBB, he planed to use the GPIO1_25 as an interrupt signal from the tda19988..

I wanted to know why the interrupt GPIO1_25 is not used for interrupt.

Micka,

Jason Kridner

unread,
Jun 23, 2016, 3:41:22 PM6/23/16
to beagl...@googlegroups.com, Robert Nelson, Darren Etheridge
It looks like the driver supports an interrupt:

Are you concerned this interrupt is necessary for some function missing in your system?

Is this something we can enable in the device tree?


We probably need to ask the original developer why the IRQ wasn't connected to the driver.
 

Micka,

--
For more options, visit http://beagleboard.org/discuss
---
You received this message because you are subscribed to the Google Groups "BeagleBoard" group.
To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAF%2BMRtnFvUhqGqCNJMPVM%2Bb-f0OQr%2BSiZY8DUPCdHbgVWYkxMw%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.

Micka

unread,
Jun 23, 2016, 3:48:02 PM6/23/16
to beagl...@googlegroups.com
Hi,

Thx for the answer, no I don't need it. It's just by curiosity.



To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CA%2BT6QPmb4Np86P-nHgvkfZirbZUhn0DyF413mqxyMdAb372yCQ%40mail.gmail.com.

Gerald Coley

unread,
Jun 23, 2016, 3:49:08 PM6/23/16
to beagl...@googlegroups.com, Robert Nelson, Darren Etheridge
This interrupt is to pass IR remote information to the processor over the HDMI from the TV. As the BBB is lacking a tuner, I am not sure how much value this feature has. 

Gerald

To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CA%2BT6QPmb4Np86P-nHgvkfZirbZUhn0DyF413mqxyMdAb372yCQ%40mail.gmail.com.

For more options, visit https://groups.google.com/d/optout.



--

Micka

unread,
Jun 23, 2016, 4:01:14 PM6/23/16
to beagl...@googlegroups.com, Robert Nelson, Darren Etheridge
Well from those lines: 

http://lxr.free-electrons.com/source/drivers/gpu/drm/i2c/tda998x_drv.c?v=4.1#L1304

I thought that it was to help to read the edid data or about the plug/unplug:

566  * only 2 interrupts may occur: screen plug/unplug and EDID read
http://lxr.free-electrons.com/source/drivers/gpu/drm/i2c/tda998x_drv.c?v=4.1#L565





To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAHK_S%2Bc4LGtZVo5gVoDOXHf1NM6D074eQBS4QPCkU67yvMUyrA%40mail.gmail.com.

Gerald Coley

unread,
Jun 23, 2016, 4:48:03 PM6/23/16
to beagl...@googlegroups.com, Robert Nelson, Darren Etheridge
Not sure about unplug and plug in.

Gerald


To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAF%2BMRt%3D%2B0gd7EwHG585D1kdw9TWE8HfL7OgYF3dSRRhpG8dnFg%40mail.gmail.com.

For more options, visit https://groups.google.com/d/optout.
Reply all
Reply to author
Forward
0 new messages