Port xf86-video-ast to Openpower

[Dave Airlie]

The Xorg modesetting driver should be fine on this hardware, you don't
need the -ast driver.

Dave.

On 15 April 2016 at 11:49, yu <kkndyu at gmail.com> wrote:
> Dear Maintainers,
>
>
> I have a Tyan TN71-BP012 power8 server, and its graphic is  Aspeed AST2400.
> http://tyan.com/Barebones_TN71-BP012_BSP012T71V14HR-4T-3
>
> Recently I test Ubuntu 15.10 ppc64el on it, the kernel ast driver
> works OK, but when test X, I found that the ast_drv.so build from the
> xf86-video-ast can not work, here is the error message from X:
>
> [  7498.243] (II) LoadModule: "ast"
> [  7498.244] (II) Loading /usr/lib/xorg/modules/drivers/ast_drv.so
> [  7498.244] (EE) Failed to load
> /usr/lib/xorg/modules/drivers/ast_drv.so:
> /usr/lib/xorg/modules/drivers/ast_drv.so: undefined symbol: ioBase
> [  7498.244] (II) UnloadModule: "ast"
> [  7498.244] (II) Unloading ast
> [  7498.244] (EE) Failed to load module "ast" (loader failed, 7)
>
> I searched the "ioBase", it is defined in the compiler.h under the
> MACRO "__powerpc__", so I just change the MACRO to let the driver can
> be load, then error again:
>
> [ 26963.956] (WW) Falling back to old probe method for ast
> [ 26963.956] (--) Assigning device section with no busID to primary device
> [ 26963.956] (--) Assigning device section with no busID to primary device
> [ 26963.956] (WW) AST: More than one matching Device section found:
> Autoconfigured Video Device ast
> [ 26963.956] (--) Chipset ASPEED Graphics Family found
> [ 26963.956] (EE) ast: The PCI device 0x2000 at 07 at 01:00:0 has a
> kernel module claiming it.
> [ 26963.956] (EE) ast: This driver cannot operate until it has been unloaded.
>
> So I just comment the "pci_device_has_kernel_driver" in ast_driver.c
> to let the probe continue, then error again:
>
> [ 22795.892] (II) AST(0): Creating default Display subsection in Screen section
>         "Default Screen Section" for depth/fbbpp 24/32
> [ 22795.892] (==) AST(0): Depth 24, (--) framebuffer bpp 32
> [ 22795.892] (==) AST(0): Using gamma correction (1.0, 1.0, 1.0)
> [ 22795.892] (==) AST(0): RGB weight 888
> [ 22795.892] (==) AST(0): Default visual is TrueColor
> [ 22795.892] (--) AST(0): Chipset: "ASPEED Graphics Family"
> [ 22795.892] (II) AST(0): Linear framebuffer at 0x82000000
> [ 22795.893] (II) AST(0): IO registers at addr 0x81800000
> [ 22795.893] (EE) AST(0): Map Memory Map IO Failed
>
>
> It seems that the xf86-video-ast driver is for a 32bit system? is
> there other X driver for the power8 machine using AST chips?
>
> BTW: The xf86-video-vesa can't work on the machine either, the error
> message is also "undefined symbol: ioBase".
>
> cheers
>
> Yu
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