Forum >Building Robopeak 2.8” USB TFT driver for Angstrom.
Building Robopeak 2.8” USB TFT driver for Angstrom.
ferite 2014-05-22 07:33:27 7602 Views2 Replies Hi.
I am working on building the driver for a the Robopeak 2.8” USB TFT Touch Display. When I build the driver against Ångström (for x86 board) kernel header sources, I am getting this error:
* error: 'struct fb_info' has no member named 'fbdefio'*
After researching the problem, it seems caused for the lack of a setting in the kernel .config file:
CONFIG_FB_DEFERRED_IO=y
I tryed just to add the line to the file but it still does not work. I tryed to add the following section to video/Kconfig (this does not make difference either):
config FB_DEFERRED_IO
tristate
depends on FB
default n
I hope that someone could provide some advice on how could I add CONFIG_FB_DEFERRED_IO config to my system so I can finish the building process?.
Thanks.
I am working on building the driver for a the Robopeak 2.8” USB TFT Touch Display. When I build the driver against Ångström (for x86 board) kernel header sources, I am getting this error:
* error: 'struct fb_info' has no member named 'fbdefio'*
After researching the problem, it seems caused for the lack of a setting in the kernel .config file:
CONFIG_FB_DEFERRED_IO=y
I tryed just to add the line to the file but it still does not work. I tryed to add the following section to video/Kconfig (this does not make difference either):
config FB_DEFERRED_IO
tristate
depends on FB
default n
I hope that someone could provide some advice on how could I add CONFIG_FB_DEFERRED_IO config to my system so I can finish the building process?.
Thanks.
2014-05-23 19:38:51 Ferite,
After a little digging around. I guess that it might depend on the Board support package.
Is it possible that parameter has changed name in Angstrom?
cheers^^ Jose
After a little digging around. I guess that it might depend on the Board support package.
Is it possible that parameter has changed name in Angstrom?
cheers^^
Jose 2014-05-22 23:17:24 Hi ferite,
The standard approach is to add some KConfig line in the kernel source to create a driver section which refer to the CONFIG_FB_DEFERRED_IO feature.
A simple way is :
Select the Displaylink display driver ( Device Drivers-> Graphics support -> Support for frame buffer devices-> Displaylink USB Framebuffer support) as an external module. By doing so, the above features will be selected by the menuconfiger.
csk
The standard approach is to add some KConfig line in the kernel source to create a driver section which refer to the CONFIG_FB_DEFERRED_IO feature.
A simple way is :
Select the Displaylink display driver ( Device Drivers-> Graphics support -> Support for frame buffer devices-> Displaylink USB Framebuffer support) as an external module. By doing so, the above features will be selected by the menuconfiger.
csk 