[Bug 90137] [ilk] IPS frequently downclocks the GPU when playing quakelive

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90137

--- Comment #12 from dimon at gmx.net ---
Great news, your ilk machine is running, that's a big advantage.

I did some printk work...
The problem is I'm not getting any DE_PCU_EVENT interrupts.
They are unmasked but not set in deiir.

Here are some logs:

static void ivb_display_irq_handler(struct drm_device *dev, u32 de_iir)
@@ -2145,7 +2158,8 @@ static irqreturn_t ironlake_irq_handler(int irq, void
*arg)
        }

        de_iir = I915_READ(DEIIR);
-       if (de_iir) {
+        printk("de_iir 0x%x deimr 0x%x deier 0x%x\n", de_iir,
I915_READ(DEIMR), I915_READ(DEIER));
+        if (de_iir) {


[  619.658081] ilk_display_irq_handler
[  619.658832] de_iir 0x0 deimr 0x714bfb7b deier 0xeb48585
[  619.663854] de_iir 0x0 deimr 0x714bfb7b deier 0xeb48585
[  619.664917] de_iir 0x0 deimr 0x714bfb7b deier 0xeb48585
[  619.665909] de_iir 0x0 deimr 0x714bfb7b deier 0xeb48585
[  619.666984] de_iir 0x0 deimr 0x714bfb7b deier 0xeb48585
[  619.669067] de_iir 0x0 deimr 0x714bfb7b deier 0xeb48585
[  619.673124] de_iir 0x0 deimr 0x714bfb7b deier 0xeb48585
[  619.674803] de_iir 0x4000080 deimr 0x714bfb7b deier 0xeb48585
[  619.674806] ilk_display_irq_handler
[  619.676151] de_iir 0x0 deimr 0x714bfb7b deier 0xeb48585
[  619.677224] de_iir 0x0 deimr 0x714bfb7b deier 0xeb48585
[  619.680201] de_iir 0x0 deimr 0x714bfb7b deier 0xeb48585
[  619.681298] de_iir 0x0 deimr 0x714bfb7b deier 0xeb48585
[  619.682252] de_iir 0x0 deimr 0x714bfb7b deier 0xeb48585
[  619.683301] de_iir 0x0 deimr 0x714bfb7b deier 0xeb48585
[  619.691442] de_iir 0x4000080 deimr 0x714bfb7b deier 0xeb48585
[  619.691448] ilk_display_irq_handler
[  619.708108] de_iir 0x4000080 deimr 0x714bfb7b deier 0xeb48585
[  619.708128] ilk_display_irq_handler
[  619.724845] de_iir 0x4000080 deimr 0x714bfb7b deier 0xeb48585
[  619.724899] ilk_display_irq_handler
[  619.741503] de_iir 0x4000080 deimr 0x714bfb7b deier 0xeb48585
[  619.741530] ilk_display_irq_handler

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