Commit 27be9a9e authored Mar 11, 2011 by Vasily Khoruzhick Committed by Eric Miao Mar 16, 2011

ARM: pxafb: don't disable controller on cpufreq transition if overlay in use



It's not safe to disable controller if overlay(s) is enabled (results in
system hang). So we avoid to disable controller in this case. Userspace
should choose proper governor to avoid freq changing when overlay is in
use, otherwise LCD may blink.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

parent dcf8eee9

drivers/video/pxafb.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1648,6 +1648,7 @@ pxafb_freq_transition(struct notifier_block nb, unsigned long val, void data)

		switch (val) {
		case CPUFREQ_PRECHANGE:
		if (!fbi->overlay[0].usage && !fbi->overlay[1].usage)
		set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
		break;

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