How to enable EGLFS KMS

Eric Ruei

I was trying to use EGLFS KMS through command-line configuration -platform eglfs and setting QT_QPA_EGLFS_INTEGRATION=eglfs_kms. Unfortunately, it did not work. Then I found out that the EGLFS KMS is not enabled at my configuration:

QPA backends:
DirectFB ............. no
EGLFS ................ yes
EGLFS i.MX6....... . no
EGLFS KMS .......... no
EGLFS Mali ......... no
EGLFS Raspberry Pi . no
EGLFS X11 .......... no
LinuxFB .............. yes
XCB .................. no
...

It is not cleared how to enable EGLFS KMS. Any help will be highly appreciated.

Best regards,

Eric

SGaist

Hi and welcome to devnet,

to enable kms from configure you can call configure -kms, you also need to have libdrm-dev installed.

Eric Ruei

Thank you very much!
Yes, I was able to rebuild QT5 and enable EGLFS-KMS now.

Ronak5

@SGaist said in How to enable EGLFS KMS:

Hi and welcome to devnet,
to enable kms from configure you can call configure -kms, you also need to have libdrm-dev installed.

Hi I need to do this too. But i didn't get where to call this command. Could you help? Thanks.

Also, I don't see eglfs_kms option in configure summary. So I don't know what's missing here.

QPA backends:
DirectFB ............. no
EGLFS ................ yes
EGLFS i.MX6....... . no
EGLFS GBM .......... no
EGLFS Mali ......... no
EGLFS Raspberry Pi . no
EGLFS X11 .......... no
LinuxFB .............. no
XCB .................. no

SGaist

Hi,

It's an option of the configure script.

Asha

@SGaist

Hi,

I want enable this EGLFS.........no to EGLFS ........yes(in my case it is no,)so how enable this one?
QPA backends:
DirectFB ............. no
EGLFS ................ yes( in my case, this one is no ,after configuration ,so i want to enable this one ,how to enable )
EGLFS i.MX6....... . no
EGLFS KMS .......... no
EGLFS Mali ......... no
EGLFS Raspberry Pi . no
EGLFS X11 .......... no
LinuxFB .............. yes
XCB .................. no
...

SGaist

Hi,

Check the configuration logs and see why the test failed. Usually it's a library missing so a development package to install.

onek24

@SGaist

Hello,
configurating with -kms fails.
When installing libdrm-dev, it adds header files into this path:

sysroot/usr/include/libdrm/

while the file xf86drmMode.h is trying to include <drm.h>, but is in this path

sysroot/usr/include/

Do i have to manually add sysroot/usr/include/libdrm/ as an include path before configurating Qt, so that xf86drmMode.h can find the <drm.h> which is in the subdirectory libdrm?