Hi,
There are a couple of options here.
On Tuesday 03 September 2013 06:14 AM, Sid Boyce wrote:
The Pandaboard list seems dormant so I am seeking help here.
The previous kernel with HDMI video output was 3.2.7x5.
I built and installed this new kernel with this xorg.conf, it does not
work.
Section "Device"
Identifier "fb0"
Driver "omapfb"
Option "fb" "/dev/fb0"
EndSection
Looks like the problem below was buffer allocation. You could use
omapdrm instead of omapfb which should allocate buffers successfully. I
think the omapdrm drivers was in staging at that point. You could search
for it in the .config, and set NUM_CRTCS to 2.
Section "Monitor"
Identifier "HP"
ModeLine "1920x1080" 148.501 1920 2008 2052 2200 1080 1084 1089
1125 -HSync -VSync
EndSection
Section "Screen"
Identifier "screen0"
Device "fb0"
Monitor "HP"
DefaultDepth 16
SubSection "Display"
Depth 16
Modes "1920x1080" "800x480"
EndSubSection
EndSection
Mode "800x480"
# D: 29.001 MHz, H: 31.251 kHz, V: 59.525 Hz
DotClock 29.002
HTimings 800 840 888 928
VTimings 480 503 506 525
Flags "-HSync" "-VSync"
EndMode
Using the udlfb driver and an xorg.conf for the Lilliput USB 7" screen
there is no problem, LXDE is up and running and CRTL-ALT-F1 etc. all
OK, but I need the USB screen for the Beaglebone.
root@panda:/etc/X11# lsmod
Module Size Used by
omapdss 253516 0
udlfb 17703 2
bluetooth 221172 6
snd_usb_audio 115881 0
snd_usbmidi_lib 18680 1 snd_usb_audio
snd_rawmidi 21747 1 snd_usbmidi_lib
snd_hwdep 6190 1 snd_usb_audio
snd_pcm_oss 42617 0
snd_mixer_oss 14244 1 snd_pcm_oss
snd_pcm 84961 2 snd_pcm_oss,snd_usb_audio
snd_page_alloc 5296 1 snd_pcm
snd_timer 20277 1 snd_pcm
snd 61483 8
snd_pcm_oss,snd_usb_audio,snd_hwdep,snd_timer,snd_pcm,snd_rawmidi,snd_usbmidi_lib,snd_mixer_oss
soundcore 7260 1 snd
ehci_hcd 54613 0
ohci_hcd 31836 0
root@panda:/etc/X11# ls /lib/modules/3.8.13.6x-dirty/kernel/drivers/video/
backlight omap2 udlfb.ko
root@panda:/etc/X11# ll
/lib/modules/3.8.13.6x-dirty/kernel/drivers/video/omap2/omapfb
total 64
drwxr-xr-x 2 root root 4096 Sep 2 10:18 ./
drwxr-xr-x 5 root root 4096 Sep 2 10:18 ../
-rw-r--r-- 1 root root 56916 Sep 2 02:52 omapfb.ko
root@panda:/etc/X11# modprobe omapfb
ERROR: could not insert 'omapfb': No such device
root@panda:/etc/X11# insmod
/lib/modules/3.8.13.6x-dirty/kernel/drivers/video/omap2/omapfb/omapfb.ko
Error: could not insert module
/lib/modules/3.8.13.6x-dirty/kernel/drivers/video/omap2/omapfb/omapfb.ko: No
such device
root@panda:/1/ubuntu-raring# grep CONFIG_FB .config
CONFIG_FB=y
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
CONFIG_FB_SYS_FILLRECT=y
CONFIG_FB_SYS_COPYAREA=y
CONFIG_FB_SYS_IMAGEBLIT=y
CONFIG_FB_SYS_FOPS=y
CONFIG_FB_DEFERRED_IO=y
CONFIG_FB_MODE_HELPERS=y
CONFIG_FB_TILEBLITTING=y
CONFIG_FB_ARMCLCD=y
CONFIG_FB_UVESA=y
CONFIG_FB_TMIO=y
CONFIG_FB_TMIO_ACCELL=y
CONFIG_FB_UDL=m
CONFIG_FB_VIRTUAL=y
CONFIG_OMAP2_VRFB=y
CONFIG_OMAP2_DSS_RFBI=y
CONFIG_FB_OMAP2=m
CONFIG_FB_OMAP2_DEBUG_SUPPORT=y
CONFIG_FB_OMAP2_NUM_FBS=3
The other option is to figure out why it's not working with omapfb.
Could you add a CONFIG_OMAP2_DSS_DEBUG in order to get additional DSS
prints?
root@panda:/etc/X11# grep HDMI /1/ubuntu-raring/.config
CONFIG_OMAP4_DSS_HDMI=y
ONFIG_ARCH_OMAP4=y
CONFIG_MACH_OMAP4_PANDA=y
Displayed on the serial console
=======================
root@panda:~# [34587.439270] omapdss error: timeout reading edid
[34587.445220] omapfb omapfb: failed to allocate framebuffer
[34587.450958] omapfb omapfb: failed to allocate fbmem
[34587.456604] omapfb omapfb: failed to setup omapfb
[34587.461853] failed to register omapfb driver
The debug prints will help with the edid timeout. About the allocation
of buffers, I think it should work if you enable CMA. And set
CONFIG_CMA_SIZE_MBYTES to say, 24 Mb. That should allocate the buffers
successfully.
Archit
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