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블로그 항해 일지/Embedded Linux +2

USB-UART Module Kit 1 13,090원 13,090원 30pin GPIO Ribbon Cable for XU4 1 3,960원 3,960원 XU4 Shifter Shield 1 23,760원 23,760원 Dual stacking 30pin and 12pin Header Extenders 1 2,420원 2,420원 30pin and 12pin Header Sockets 1 1,980원 1,980원 Shipping 1 3,300원 3,300원

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Enable HDMI console output in uboot
Unread postby suriyan » Sat Jan 03, 2015 4:55 pm

Hi,
This might be useful to some. This patch enables HDMI (720p) console output as uboot executes. I am attaching the patch (which could be merged) and the compiled uboot with the fusing scripts in case one wants to try it.

Thanks
- Suriyan
ATTACHMENTS
sd_fuse.hdmiout.tgz
(241.23 KiB) Downloaded 103 times
0001-Enable-HDMI-console.patch.gz
(1.63 KiB) Downloaded 127 times
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suriyan

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Re: Enable HDMI console output in uboot
Unread postby mdrjr » Sat Jan 03, 2015 6:19 pm

That's nice :) Tested it here :P
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Re: Enable HDMI console output in uboot
Unread postby tobetter » Sat Jan 03, 2015 8:18 pm

suriyan wrote:
Hi,
This might be useful to some. This patch enables HDMI (720p) console output as uboot executes. I am attaching the patch (which could be merged) and the compiled uboot with the fusing scripts in case one wants to try it.

Thanks
- Suriyan

Hey, Suriyan.
Welcome your patch! :mrgreen:
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Re: Enable HDMI console output in uboot
Unread postby parkerlreed » Mon Jan 05, 2015 6:44 am

Can this be applied from within the Ubuntu image?
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Re: Enable HDMI console output in uboot
Unread postby mdrjr » Mon Jan 05, 2015 6:49 am

Yes, just run the sd_fuse that suryian posted :)
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Re: Enable HDMI console output in uboot
Unread postby parkerlreed » Mon Jan 05, 2015 6:52 am

I ran

CODE: SELECT ALL
sudo ./sd_fusing.sh /dev/mmcblk0

but after a reboot it just seems to be the same.
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Re: Enable HDMI console output in uboot
Unread postby mdrjr » Mon Jan 05, 2015 7:32 am

You need the uart kit to reset the u-boot env...

You need to run: 
CODE: SELECT ALL
env default -f
save
reset

On U-Boot
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Re: Enable HDMI console output in uboot
Unread postby parkerlreed » Mon Jan 05, 2015 8:06 am

Ahh ok thanks. Might be a little bit before I hack up my uart cable. Thanks for the info.
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Re: Enable HDMI console output in uboot
Unread postby suriyan » Tue Jan 06, 2015 8:39 am

Another way to revert to the default env without uboot intervention is to corrupt the uboot environment starting at sector 1024.
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Re: Enable HDMI console output in uboot
Unread postby suriyan » Sun Jan 11, 2015 12:20 am

Hello mdrjr/tobetter,
Will this be merged? I need to build up on this for the usb stuff. hence this question. Also, if the -mno-unaligned-access in config.mk which this patch has, ums commands etc work too.
I have gotten usb host to work as well, and usb storage is fine, but still ironing out issues with low speed device enumeration. If this patch gets in, I do not have to keep remembering to have to change config.mk.

Thanks
- Suriyan
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Re: Enable HDMI console output in uboot
Unread postby tobetter » Sun Jan 11, 2015 12:42 am

suriyan wrote:
Hello mdrjr/tobetter,
Will this be merged? I need to build up on this for the usb stuff. hence this question. Also, if the -mno-unaligned-access in config.mk which this patch has, ums commands etc work too.
I have gotten usb host to work as well, and usb storage is fine, but still ironing out issues with low speed device enumeration. If this patch gets in, I do not have to keep remembering to have to change config.mk.

Thanks
- Suriyan

Hello Suriyan,
Your patch is merged in internal git, and will be released sometime. -mno-unaligned-access is actually applied in other commit since it's not very related with HDMI output. But it improve some features. UMS already worked in the current U-boot.
U-boot github is updated just now.
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Re: Enable HDMI console output in uboot
Unread postby suriyan » Sun Jan 11, 2015 7:34 am

Thanks tobetter,
I see the changes that you mention now!
- Suriyan
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sd_fuse.hdmiout.tgz
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