Petalinux-Zybo-Z7-10 Petalinux-Zybo-Z7-10-2017.4-1.bsp

[tkoroknai]

Hello,

 

I have downloaded the

Petalinux-Zybo-Z7-10-2017.4-1.bsp and booted from an SD card in my Zybo-Z7-10  zynq-7010.

 

On this page:

https://reference.digilentinc.com/reference/software/petalinux/start

It states that the petalinux bsp should include:

* gpioutil
* pwmdemo
* kmsdemo

 

but it does not have the kmsdemo only the other two.

 

I tried to download kmsutil and compile it on the board

https://raw.githubusercontent.com/Digilent/kmsdemo/master/kmsutil.c
 

like this:

root@Zybo-Z7-10:~# gcc kmsutil.c -lvrc
kmsutil.c:1:20: fatal error: libvrc.h: No such file or directory
 #include <libvrc.h>
                    ^
compilation terminated.
 

but the bsp did not include the libvrc either. What is the simplest way to get this demo working?

 

This is somewhat odd, because the HDMI output works, it outputs a console. And the bsp feature list says:"HDMI output with kernel mode setting (KMS)"

 

 

Thanks!

[Ionel]

There is no code to draw any shape as you observed since it was/is a work in progress. Thus it was excluded by default from `rootfs`.

However it was mentioned by mistake in the first link you mentioned. https://reference.digilentinc.com/reference/software/petalinux/start

The issue has been corrected.

[tkoroknai]

I could compile it on the board but it says segmentation fault.

root@Zybo-Z7-10:~# gcc kmsutil.c -lvrc
kmsutil.c: In function 'main':
kmsutil.c:28:17: warning: multi-character character constant [-Wmultichar]
         if(c == '^C') {
                 ^~~~
kmsutil.c: In function 'printDeviceInfo':
kmsutil.c:58:30: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     (*mode_card).fb_id_ptr = (uint64_t) res_fb_buf;
                              ^
kmsutil.c:59:32: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     (*mode_card).crtc_id_ptr = (uint64_t) res_crtc_buf;
                                ^
kmsutil.c:60:37: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     (*mode_card).connector_id_ptr = (uint64_t) res_conn_buf;
                                     ^
kmsutil.c:61:35: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     (*mode_card).encoder_id_ptr = (uint64_t) res_enc_buf;
                                   ^
kmsutil.c:84:30: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     (*connector).modes_ptr = (uint64_t) mode_buffer;
                              ^
kmsutil.c:85:30: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     (*connector).props_ptr = (uint64_t) conn_prop_buf;
                              ^
kmsutil.c:86:36: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     (*connector).prop_values_ptr = (uint64_t) conn_propval_buf;
                                    ^
kmsutil.c:87:33: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     (*connector).encoders_ptr = (uint64_t) conn_enc_buf;
                                 ^
kmsutil.c:106:50: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
             struct drm_mode_modeinfo * modePtr = (struct drm_mode_modeinfo *) (*connector).modes_ptr + i;
                                                  ^
kmsutil.c:119:46: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
         struct drm_mode_modeinfo * modePtr = (struct drm_mode_modeinfo *) (*connector).modes_ptr + devNum;
                                              ^

Running it:

root@Zybo-Z7-10:~# ./a.out -h
./a.out: option requires an argument -- 'h'
Usage: ./a.out [ -d | -s | -h ] [Resolution Mode # to select (if using -s)] 
  This program will use the HDMI output to gather the valid resolution modes from the connected monitor

  using the '-d' option will print these valid resolution modes to the console

  Additionally, this program will draw some basic shapes to the connected monitor


  -h --help     Print this usage information
  -d --device   Print information about the supported resolution modes
  -s --set      Set the connected monitor to the resolution mode specific by the flag


  To get information about supported resolutions, type './a.out -d'
  To set a resolution, type './a.out -s [n]', where [n] is the listed resolution mode number given by using -d
  This utility defaults to port /dev/dri/card0

root@Zybo-Z7-10:~# ./a.out -d
Segmentation fault
root@Zybo-Z7-10:~# ./a.out   
Segmentation fault
root@Zybo-Z7-10:~# 

I supposed it needs some more stuff to work. Could you point me somewhere?

 

Thanks!
 

[Ionel]

Hello @tkoroknai the `kmsdemo` module is not included by default in rootfs.

To have it included we have to rebuild the petalinux image.

 Steps:

1. Source petalinux environment: https://github.com/Digilent/Petalinux-Zybo-Z7-10#source-the-petalinux-tools

2. Change directory to petalinux project directory(contains project-spec directory) by default: Zybo-Z7-10

3. Issue command: petalinux-config -c rootfs

4. In menuconfig open section apps.

5. Select kmsdemo and press space to mark it for inclusion.

6. Save and exit.

7. Continue with petalinux-build command as you did first time.

8. After deploying the new petalinux image file  `/usr/bin/kmsdemo` should exist.

[tkoroknai]

On 7/29/2019 at 2:08 PM, Ionel said:

Hello @tkoroknai the `kmsdemo` module is not included by default in rootfs.

To have it included we have to rebuild the petalinux image.

 Steps:

1. Source petalinux environment: https://github.com/Digilent/Petalinux-Zybo-Z7-10#source-the-petalinux-tools

2. Change directory to petalinux project directory(contains project-spec directory) by default: Zybo-Z7-10

3. Issue command: petalinux-config -c rootfs

4. In menuconfig open section apps.

5. Select kmsdemo and press space to mark it for inclusion.

6. Save and exit.

7. Continue with petalinux-build command as you did first time.

8. After deploying the new petalinux image file  `/usr/bin/kmsdemo` should exist.

Hi,

I did the steps successfully and kmsdemo is under /usr/bin

but:

root@Zybo-Z7-10:~# kmsdemo -s 1
Segmentation fault
root@Zybo-Z7-10:~# kmsdemo -s 2
Segmentation fault
root@Zybo-Z7-10:~# kmsdemo -d
***********************************************
[Resolution Mode: 0
[       1920x1080
[       Clock: 148500           Vrefresh: 60
***********************************************


***********************************************
[Resolution Mode: 1
[       1920x1080
[       Clock: 148352           Vrefresh: 60
***********************************************

and it doesn't draw anything on the connected display to tx hdmi port.

 

What do you think?

[tkoroknai]

I connected several monitors to the zybo, and it can read the resolution of most. But when I try the

kmsdemo -s  0

or any other number segmentation fault and nothing happens. 

It is odd that when I compile the kmsdemo source from here blinks the connected display for a moment before segmentation fault. While the kmsdemo added in rootfs only prints the resolution and does nothing else.

 

Is there any information what kind of display is supported?

 

Which debugger could I use to figure this out?

 

Thank you!

[tkoroknai]

I'm looking at the kmsdemo code and I don't see the part where it is supposed to draw shapes on the screen even tho it says:

 

puts(" Additionally, this program will draw some basic shapes to the connected monitor\n\n");

 

Could you please show me the part that is supposed to draw the shapes? thank you!