OpenGL Driver (vc4-kms-v3d) on Rpi3 locks up

[loganmc10]

I have enabled the hardware accelerated OpenGL Driver on the Raspberry Pi 3, and I've compiled RetroArch and mupen64plus-libretro from source.

When I try to launch any game, it locks up at this point:

RetroArch [INFO] :: Version of libretro API: 1
RetroArch [INFO] :: Compiled against API: 1
RetroArch [INFO] :: Set audio input rate to: 44107.31 Hz.
RetroArch [INFO] :: Video @ 1920x1440
RetroArch [INFO] :: Using HW render, OpenGL driver forced.
RetroArch [INFO] :: [EGL]: EGL version: 1.4

This is what GDB says:
#0 0x76cefa40 in do_futex_wait (

isem=isem@entry=0x76a61920 <dispmanx_message_available_event+24>)
at ../nptl/sysdeps/unix/sysv/linux/sem_wait.c:48

#1 0x76cefaf4 in __new_sem_wait (

sem=0x76a61920 <dispmanx_message_available_event+24>)
at ../nptl/sysdeps/unix/sysv/linux/sem_wait.c:69

#2 0x76a4aeb4 in dispmanx_send_command () from /opt/vc/lib/libbcm_host.so
#3 0x76a4c500 in vc_dispmanx_update_submit_sync ()

from /opt/vc/lib/libbcm_host.so
#4 0x0013d3a8 in gfx_ctx_vc_init (video_driver=0x2cf218)

at gfx/drivers_context/vc_egl_ctx.c:287

#5 0x0012fe94 in gfx_ctx_init (data=0x2cf218,

ctx=0x209284 <gfx_ctx_videocore>, ident=0x760e3044 "",
api=GFX_CTX_OPENGL_ES_API, major=0, minor=0, hw_render_ctx=false)
at gfx/video_context_driver.c:177

#6 0x00130004 in gfx_ctx_find_driver (data=0x2cf218, ident=0x760e3044 "",

api=GFX_CTX_OPENGL_ES_API, major=0, minor=0, hw_render_ctx=false)
at gfx/video_context_driver.c:225

#7 0x00130090 in gfx_ctx_init_first (data=0x2cf218, ident=0x760e3044 "",

api=GFX_CTX_OPENGL_ES_API, major=0, minor=0, hw_render_ctx=false)
at gfx/video_context_driver.c:254

#8 0x00137610 in gl_get_context (gl=0x2cf218) at gfx/drivers/gl.c:2490
#9 0x001376a8 in gl_init (video=0x7effd248, input=0x248eac <current_input>,

---Type to continue, or q to quit---
input_data=0x248eb0 <current_input_data>) at gfx/drivers/gl.c:2652
#10 0x0003ffcc in init_video () at gfx/video_driver.c:714
#11 0x00041a44 in video_driver_ctl (state=RARCH_DISPLAY_CTL_INIT, data=0x0)

at gfx/video_driver.c:1480

#12 0x00044548 in init_drivers (flags=127) at driver.c:330
#13 0x00044948 in driver_ctl (state=RARCH_DRIVER_CTL_INIT, data=0x7effd3c0)

at driver.c:456

#14 0x00044964 in driver_ctl (state=RARCH_DRIVER_CTL_INIT_ALL, data=0x0)

at driver.c:462

#15 0x000220a0 in rarch_main_init (argc=5, argv=0x7efff734) at retroarch.c:1307
#16 0x00022588 in rarch_ctl (state=RARCH_CTL_MAIN_INIT, data=0x2bf158)

at retroarch.c:1437

#17 0x000308f0 in content_load (info=0x7efff5a4) at content.c:878
#18 0x00032954 in content_ctl (state=CONTENT_CTL_LOAD, data=0x7efff5a4)

at content.c:1778

#19 0x0001d710 in rarch_main (argc=5, argv=0x7efff734, data=0x0)

at frontend/frontend.c:129

#20 0x0001d934 in main (argc=5, argv=0x7efff734) at frontend/frontend.c:184

[HerbFargus]

You realise the opengl driver on the raspberry is considered experimental right?

[loganmc10]

That is why I am experimenting

[HerbFargus]

All the same it's doubtful it's a bug with retroarch

[loganmc10]

That could be true, I just wanted the RetroArch developers to take a look and see if there is any way to fix it, I'll also bring it up with the people responsible for the driver.

Getting this working could be a huge deal for N64 emulation on the Raspberry Pi.

[joolswills]

Looks as though you have compiled for opengles rather than opengl

This isn't a retroarch issue

[loganmc10]

I built it using retroarch-build.sh in libretro-super, can you suggest how I can compile it without enabling gles?

[joolswills]

I can't.

Also are you running it under X? - the new RPI opengl driver is only for the desktop env - won't work from the framebuffer.

[loganmc10]

I'll need to do some more testing, but if this really is a problem because opengles is enabled, then it is a RetroArch problem. RetroArch makes that assumption when it is compiled on a Raspberry Pi

in qb/config.libs.sh:
if [ "$HAVE_VIDEOCORE" = 'yes' ]; then
HAVE_GLES='auto'
EXTRA_GL_LIBS="-lEGL -lGLESv2 -lbcm_host -lvcos -lvchiq_arm"
fi

And in the Makefile of mupen64plus-libretro:
else ifneq (,$(findstring rpi,$(platform)))
GLES = 1
GL_LIB := -L/opt/vc/lib -lGLESv2

[loganmc10]

It looks like it may have worked (it compiles and runs better, but exits over SSH because it has no display of course), I'll test it tonight on my TV when I get home. If it does work then the RetroArch build system will probably need to be updated to account for the fact that the Raspberry Pi doesn't always want GLES

[joolswills]

Yes. it is set to build for opengles on RPI. I'm sure they would welcome a PR to make this optional, but since the RPI opengl is experimental, they may not want people to use it yet.

[loganmc10]

That's true, I will keep experimenting, thanks for the help, I don't really know much about graphics drivers, it seems that disabling OpenGL ES is a good first step for me.