drm/radeon/kms: use udelay for short delays
For usec delays use udelay instead of scheduling, this should allow reclocking to happen faster. This also was the cause of reported 33s delays at bootup on certain systems. fixes: freedesktop.org bug 25506 Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
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@ -643,7 +643,7 @@ static void atom_op_delay(atom_exec_context *ctx, int *ptr, int arg)
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uint8_t count = U8((*ptr)++);
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SDEBUG(" count: %d\n", count);
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if (arg == ATOM_UNIT_MICROSEC)
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schedule_timeout_uninterruptible(usecs_to_jiffies(count));
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udelay(count);
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else
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schedule_timeout_uninterruptible(msecs_to_jiffies(count));
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}
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