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drm/nvd0/disp: handle yet another interrupt 

Spotted while messing with overlay channels (probably as a result of
sending a similar "disable" sequence as we do for the flip channels).

The value in 0x61008c was 0x20, which one would reasonably guess is
"bit 5 == something to report about evo channel 5" - but who knows.

Spotted the binary driver getting this too, and it appears to not do
anything exciting as a result.  So, handle it the same way and avoid
an IRQ storm.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-11-13 03:43:30 +10:00
parent 8a46438a6a
commit 84e052e626
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/nouveau/nvd0_display.c
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@ -1585,6 +1585,12 @@ nvd0_display_intr(struct drm_device *dev)
struct nvd0_display *disp = nvd0_display(dev);
u32 intr = nv_rd32(dev, 0x610088);
if (intr & 0x00000001) {
u32 stat = nv_rd32(dev, 0x61008c);
nv_wr32(dev, 0x61008c, stat);
intr &= ~0x00000001;
}
if (intr & 0x00000002) {
u32 stat = nv_rd32(dev, 0x61009c);
int chid = ffs(stat) - 1;