raspberry2上的eglfs -*添加服务失败-已经在使用了吗？

Question

这是我在这里的第一篇帖子。

我想保持简短..。

以下问题：

我想使用raspberry-pi 2b上的eglfs后端运行一个qt5 5/qtquickcontrols2 2应用程序，当然是由vc4加速的。理想情况下，它应该在kiosk模式下运行，并且肯定需要加速的gl功能。为了最小化问题，我使用以下命令进行了测试：

LD_PRELOAD="/opt/vc/lib/libGLESv2.so /opt/vc/lib/libEGL.so" qmlscene ./gallery.qml

其中gallery.qml只是来自qt创建者的小部件预览示例项目(遵循这些说明.)。我得到了以下错误输出：

[manjaro@Loki gallery]$ LD_PRELOAD="/opt/vc/lib/libGLESv2.so /opt/vc/lib/libEGL.so" qmlscene ./gallery.qml
qt.qpa.egldeviceintegration: EGL device integration plugin keys: ("eglfs_brcm", "eglfs_kms", "eglfs_x11")
qt.qpa.egldeviceintegration: EGL device integration plugin keys (sorted): ("eglfs_brcm", "eglfs_kms", "eglfs_x11")
qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_brcm"
qt.qpa.egldeviceintegration: Using EGL device integration "eglfs_brcm"
* failed to add service - already in use?

我还测试了相同的运行交叉编译的二进制-相同的错误。除了最后一行之外，所有的代码都来自qt5的详细调试输出，我通过环境变量设置它，详细信息如下。

系统/环境：

• 覆盆子-π2b
• qt-5.7.0
• Manjaro-ARM (基于Arch Linux ARM)
• 所有固件、工具、引导、内核都已安装并更新。

其他设置..。

[manjaro@Loki gallery]$ uname -a
Linux Loki 4.4.28-1-MANJARO-ARM #1 SMP Sat Oct 29 21:01:09 CDT 2016 armv7l GNU/Linux

我的config.txt

dtparam=audio=on
#hdmi_drive=2
avoid_warnings=2
disable_overscan=1
disable_splash=1
boot_delay=0

# activate raspi cam
start_x=1

# tuning gpu accel and memory usage
gpu_mem=320
dtoverlay=vc4-kms-v3d

我的cmdline.txt

root=/dev/mmcblk0p2 rw  rootwait console=tty1 selinux=0 quiet plymouth.ignore-serial-consoles dwc_otg.lpm_enable=0 elevator=deadline fsck.repair=yes

printenv给出了以下内容：

XDG_SESSION_ID=c1
TERM=xterm
SHELL=/bin/bash
SSH_CLIENT=192.168.0.100 43274 22
QT_QPA_EGLFS_INTEGRATION=eglfs_brcm
OLDPWD=/home/manjaro
SSH_TTY=/dev/pts/0
USER=manjaro
MOZ_PLUGIN_PATH=/usr/lib/mozilla/plugins
MAIL=/var/spool/mail/manjaro
PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/opt/vc/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl
PWD=/home/manjaro/opt
LANG=de_DE.UTF-8
QT_QPA_PLATFORM=eglfs
SHLVL=1
HOME=/home/manjaro
LOGNAME=manjaro
QT_LOGGING_RULES=qt.qpa.*=true
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
SSH_CONNECTION=192.168.0.100 43274 192.168.0.107 22
XDG_RUNTIME_DIR=/run/user/1000
_=/usr/bin/printenv

您可以看到几个特定于Qt的设置:调试，使用eglfs作为默认后端，最有趣的是：QT_QPA_EGLFS_INTEGRATION=eglfs_brcm，这意味着应该使用broadcom插件。沿着eglfs_brcm，我也尝试了eglfs_kms (只是出于好奇)：

[manjaro@Loki gallery]$ export QT_QPA_EGLFS_INTEGRATION=eglfs_kms
[manjaro@Loki gallery]$ LD_PRELOAD="/opt/vc/lib/libGLESv2.so /opt/vc/lib/libEGL.so" qmlscene ./gallery.qml 
qt.qpa.egldeviceintegration: EGL device integration plugin keys: ("eglfs_brcm", "eglfs_kms", "eglfs_x11")
qt.qpa.egldeviceintegration: EGL device integration plugin keys (sorted): ("eglfs_kms", "eglfs_brcm", "eglfs_x11")
qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_kms"
qt.qpa.egldeviceintegration: Using EGL device integration "eglfs_kms"
qt.qpa.input: udev device discovery for type QFlags(0x10)
qt.qpa.input: Found matching devices ("/dev/dri/card0")
qt.qpa.eglfs.kms: Found the following video devices: ("/dev/dri/card0")
qt.qpa.eglfs.kms: Using "/dev/dri/card0"
qt.qpa.eglfs.kms: Opening device "/dev/dri/card0"
qt.qpa.eglfs.kms: Creating GBM device for file descriptor 5 obtained from "/dev/dri/card0"
* failed to add service - already in use?

这看起来既不是视频核心的问题，也不是manjaro arm的“股票”Qt的问题。它只是说什么东西可能会被堵塞，但是什么？有什么暗示吗？

覆盖和驱动似乎工作，玻璃齿轮达到~60 and运行在xfce4上。以下也是有趣之处：

[root@Loki gallery]# vcdbg log msg|& grep -v gpioman|grep -iv hdmi
001042.905: *** Restart logging
001043.889: Read command line from file 'cmdline.txt'
root=/dev/mmcblk0p2 rw  rootwait console=tty1 selinux=0 nofb dwc_otg.lpm_enable=0 elevator=deadline fsck.repair=yes
001409.425: Loading 'kernel7.img' to 0x8000 size 0x5ea25c
001413.076: Kernel trailer DTOK property says yes
001413.091: Kernel trailer DDTK property says yes
001415.514: Loading 'bcm2709-rpi-2-b.dtb' to 0x5f225c size 0x3bfc
001514.479: dtparam: audio=on
001567.591: Loaded overlay 'vc4-kms-v3d'
001836.841: Device tree loaded to 0x2effbc00 (size 0x430d)
005904.220: vchiq_core: vchiq_init_state: slot_zero = 0xd0400000, is_master = 1
005911.919: TV service:host side not connected, dropping notification 0x00000002, 0x00000001, 0x00000010
007999.619: camsubs: Looking for camera 0: i2c_port = 0, led gpio = 32, power enable gpio = 41
008000.339: camsubs: Camera not found
008000.377: camsubs: Looking for camera 0: i2c_port = 0, led gpio = 32, power enable gpio = 41
008001.091: camsubs: Camera not found
008001.128: camsubs: Looking for camera 0: i2c_port = 0, led gpio = 32, power enable gpio = 41
008001.844: camsubs: Camera not found

在我看来应该是这样。

我尝试了以下几点：

我玩gpu_mem split，尝试128-448之间的值。检查gpu看起来和预期的一样，但对执行上述应用程序没有任何影响。

[manjaro@Loki gallery]$ vcgencmd get_mem gpu
gpu=320M

我还创建了以下udev规则，以修复我最初面临的错误

[manjaro@Loki gallery]$ cat /etc/udev/rules.d/10-vchiq-permissions.rules 
SUBSYSTEM=="vchiq",GROUP="video",MODE="0660"

[manjaro@Loki gallery]$ groups
wheel video storage power users

如果没有提到的udev规则，我将得到以下错误：

[manjaro@Loki gallery]$ LD_PRELOAD="/opt/vc/lib/libGLESv2.so /opt/vc/lib/libEGL.so" qmlscene ./gallery.qml 
qt.qpa.egldeviceintegration: EGL device integration plugin keys: ("eglfs_brcm", "eglfs_kms", "eglfs_x11")
qt.qpa.egldeviceintegration: EGL device integration plugin keys (sorted): ("eglfs_brcm", "eglfs_kms", "eglfs_x11")
qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_brcm"
qt.qpa.egldeviceintegration: Using EGL device integration "eglfs_brcm"
* failed to open vchiq instance

该死的..。我现在没有主意了..。我很感激每一个能帮助我的小提示.

请不要：

• 读几个文档(我已经花了很多时间)
• 建议尝试另一个发行版(这不是一个解决方案)
• 建议通货再通我的sdcard (不是一个解决方案)

谁利用vc4?？通过EGLFS使Qt-5.7/qtquickcontrols2 2/QML在raspberrypi 2上工作。非常感谢每一个面包屑..。

Answer 1

我只是碰到了同样的问题。

当您使用opensource 'vc4-kms-v3d‘驱动程序(设置在config.txt中)时，您不能在LD_PRELOAD字符串上使用封闭源驱动程序和/opt/vc/lib/libEGL.so，。

误差

failed to add service - already in use?

正如我刚刚发现的那样。

因此，您可以在config.txt上注释行，或者不使用LD_PRELOAD策略，也可以不使用QT_QPA_EGLFS_INTEGRATION=eglfs_brcm

Answer 2

不要在config.txt评论中使用fakg

# dtoverlay=vc4-kms-v3d