Re: [Intel-gfx] Interrupt latency on some 945GM platforms

Vasily Khoruzhick
2010-09-22T05:57:30Z

On 22 of September 2010 01:56:53 Jesse Barnes wrote:

> Can you guys try something like this? My theory is that 945GM has some
> power management behavior we're failing to configure correctly. If
> disabling it works, then it's likely related.

Nope, it doesn't help, sorry

> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_d index 40cc5da..26e1d23 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -5786,6 +5786,10 @@ void intel_init_clock_gating(struct drm_device *dev)
> I915_READ(MCHBAR_RENDER_STANDBY) &
> ~RCX_SW_EX }
> }
> +
> +
> + /* Disable power management on 945GM */
> + I915_WRITE(0x10f10, 0);
> }
>
> /* Set up chip specific display functions */