rk3568 rt init

hc

2023-11-06 e3e12f52b214121840b44c91de5b3e5af5d3eb84

 kernel/drivers/gpu/drm/radeon/radeon_display.c
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@@ -1818,6 +1818,7 @@
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 	struct radeon_device *rdev = dev->dev_private;
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 	/* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
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+	preempt_disable_rt();
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 	/* Get optional system timestamp before query. */
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 	if (stime)
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@@ -1910,6 +1911,7 @@
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 		*etime = ktime_get();
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 	/* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
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+	preempt_enable_rt();
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 	/* Decode into vertical and horizontal scanout position. */
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 	*vpos = position & 0x1fff;