Commit dd92d8de authored by Daniel Vetter's avatar Daniel Vetter

Partially revert "drm/i915: s/mdelay/msleep/" in ilk rps code

This reverts commit 6adfb1ef.

Ironlake RPS code runs under an irqsave spinlock and hence sleeping
isn't allowed. Not a this long delay while blocking irqs isn't great
at all, but fixing the locking scheme is a lot more involved.

So just revert for now.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reported-by: default avatarkernel test robot <ying.huang@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@intel.com>
parent e0548f19
......@@ -4266,7 +4266,7 @@ static void ironlake_enable_drps(struct drm_device *dev)
if (wait_for_atomic((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10))
DRM_ERROR("stuck trying to change perf mode\n");
msleep(1);
mdelay(1);
ironlake_set_drps(dev, fstart);
......@@ -4297,10 +4297,10 @@ static void ironlake_disable_drps(struct drm_device *dev)
/* Go back to the starting frequency */
ironlake_set_drps(dev, dev_priv->ips.fstart);
msleep(1);
mdelay(1);
rgvswctl |= MEMCTL_CMD_STS;
I915_WRITE(MEMSWCTL, rgvswctl);
msleep(1);
mdelay(1);
spin_unlock_irq(&mchdev_lock);
}
......
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