kernel recompile only drm r600_irq_process IH: CP EOP no CP int

[Alex Deucher]

On Sat, Sep 10, 2011 at 12:35 PM, Vipin <vj358 at nyu.edu> wrote:
> Hello,
>
> First, my system set up
>
> Fedora 14
> Before : 2.6.35.6 booted with drm.debug=0x07
>
> I see drm:r600_irq_process, IH: CP int: 0x00000000
> and No IH: CP EOP
>
> with the default fedora 14 install with the above mentioned kernel
>
> After: 3.0.3 booted with drm.debug=0x07
> When I recompile my kernel, I don't see any CP int: , but only CP EOP
> interrupts.
>
> I have seen this behaviour across two machines one with fedora install &
> another with an ubuntu 10.10 (2.6.35.28 -> 3.0.3)
>
> The code in r600.c specified plain switch based on the received case. Does
> this mean the case 176-178 are not executed when I recompile the kernel ?
> which doesn't sound right because its being shown in the previous kernel ?
>
> Am I doing any mistake ? Any missing option in kernel configuration ? but
> then I shouldn't even see CP EOP.
>
> Firmware exists in /lib/firmware/radeon
>
> Any further pointers are appreciated. Please ask for more information.


The CP interrupt and the CP EOP interrupt are different interrupts.
The driver uses them for the same purpose.  Older kernels use the CP
int and newer kernels use the CP EOP interrupt as that is the
preferred method of operation for what we are using it for (GPU
fences).

Alex