AndyS
October 25, 2015, 6:33pm
1
Hi there,
/dts-v1/;
/{
fragment@0 {
overlay {
0x078 0x07 // GPIO MCLR P9_12 30 0x878 0x078
/* OUTPUT GPIO(mode7) 0x07 pulldown, 0x17 pullup, 0x?f no pullup/down / INPUT GPIO(mode7) 0x27 pulldown, 0x37 pullup, 0x?f no pullup/down */
;
fragment@1 {overlay {
P8, pins 35-38 are used by the HDMI framer. Have you disabled *BOTH*
AndyS
October 25, 2015, 8:27pm
3
I have disabled 1 as per tge Derek molloy book. How do I disable both?
$ cat /boot/uEnv.txt | grep HDMI#Disable HDMI#Audio Cape (needs HDMI Audio disabled)
These are the two capes you need to disable. The HDMIN version is the
AndyS
October 25, 2015, 11:36pm
6
This is what I have in response to your suggested command.
root@AndyBBB:/boot# cat /boot/uEnv.txt |grep HDMI#Disable HDMI/eMMC#Disable HDMI#Audio Cape (needs HDMI Audio disabled)
This what cat slots looks like
root@AndyBBB:/boot# cat $SLOTS
AndyS
October 26, 2015, 12:57pm
7
Thank for your help so far guys.
Is this a comment?
or is this a comment?
I am guessing I need to take out these # to make my eEnv.txt look like this?
##Audio Cape (needs HDMI Audio disabled)
Thank for your help so far guys.
The character '#' signifies a comment in u-boot's uEnv.txt files..
I am guessing I need to take out these # to make my eEnv.txt look like this?
##Audio Cape (needs HDMI Audio disabled)
hdmi video enabled, hdmi audio disabled, audio cape enabled.
Is that what you want?
Regards,
AndyS
October 26, 2015, 1:06pm
9
Is there a definite test I can do to verify that both capes are disabled?
So that means ## is a comment, and # is a comment. Or, any line starting with a hash( # ) is a comment.
@Robert , it seems like he wants both disabled. He’s trying to use pins that are in use by the HDMI framer, as Per Charles.
If you want both disabled: (/boot/uEnv.txt)
##Disable HDMI
to:
##Disable HDMI
Regards,
This what cat slots looks like
root@AndyBBB:/boot# cat $SLOTS 0: 54:PF— 1: 55:PF— 2: 56:PF— 3: 57:PF— 4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G 5: ff:P-O-- Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI 6: ff:P-O-- Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN 7: ff:P-O-L Override Board Name,00A0,Override Manuf,EBB-PRU-Oak
The above is probably test enough. “L” indicates that a “cape” is loaded. Although you can use debugfs as well with grep. Like so:
$ sudo cat /sys/kernel/debug/pinctrl/44e10800.pinmux/pinmux-pins |grep hdmi
AndyS
October 26, 2015, 1:21pm
13
It looks like my $SLOTS look I assume the missing L for HDMI and HDMIL means that they are not loaded?
root@AndyBBB:~# cat $SLOTS
AndyS
October 27, 2015, 12:20pm
14
Hi William,
$ sudo cat /sys/kernel/debug/pinctrl/44e10800.pinmux/pinmux-pins |grep hdmi
Returns an empty list
The full list looks like this. Pin52 look unclaimed. Maybe I have someother issue in my .dts file and subesquent .dbto file?
Pinmux settings per pin