From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vasily Khoruzhick Date: Fri, 11 Mar 2011 09:20:50 +0000 Subject: [PATCH 4/4] ARM: PXA: PXAFB: don't disable controller on cpufreq transition if overlay is in use Message-Id: <1299835250-11095-4-git-send-email-anarsoul@gmail.com> List-Id: References: <201103060030.59584.anarsoul@gmail.com> <1299835250-11095-1-git-send-email-anarsoul@gmail.com> In-Reply-To: <1299835250-11095-1-git-send-email-anarsoul@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org 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 --- drivers/video/pxafb.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c index a3bdcc1..a2e5b51 100644 --- a/drivers/video/pxafb.c +++ b/drivers/video/pxafb.c @@ -1648,7 +1648,8 @@ pxafb_freq_transition(struct notifier_block *nb, unsigned long val, void *data) switch (val) { case CPUFREQ_PRECHANGE: - set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE); + if (!fbi->overlay[0].usage && !fbi->overlay[1].usage) + set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE); break; case CPUFREQ_POSTCHANGE: -- 1.7.4.1