From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Ujfalusi Subject: [PATCH v4 2/2] backlight: pwm_bl: Check the PWM state for initial backlight power state Date: Tue, 22 Nov 2016 15:41:23 +0200 Message-ID: <20161122134123.1209-3-peter.ujfalusi@ti.com> References: <20161122134123.1209-1-peter.ujfalusi@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from fllnx209.ext.ti.com ([198.47.19.16]:50225 "EHLO fllnx209.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755728AbcKVNlX (ORCPT ); Tue, 22 Nov 2016 08:41:23 -0500 In-Reply-To: <20161122134123.1209-1-peter.ujfalusi@ti.com> Sender: linux-pwm-owner@vger.kernel.org List-Id: linux-pwm@vger.kernel.org To: thierry.reding@gmail.com, lee.jones@linaro.org Cc: tomi.valkeinen@ti.com, linux-pwm@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, p.zabel@pengutronix.de If the PWM is not enabled the backlight initially should not be enabled either if we have booted with DT and there is a phandle pointing to the backlight node. The patch extends the checks to decide if we should keep the backlight off initially. Signed-off-by: Peter Ujfalusi Acked-by: Philipp Zabel Reviewed-by: Thierry Reding --- drivers/video/backlight/pwm_bl.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 5712ddd053dd..d7efcb632f7d 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -215,6 +215,10 @@ static int pwm_backlight_initial_power_state(const struct pwm_bl_data *pb) if (!regulator_is_enabled(pb->power_supply)) return FB_BLANK_POWERDOWN; + /* The PWM is disabled, keep it like this */ + if (!pwm_is_enabled(pb->pwm)) + return FB_BLANK_POWERDOWN; + return FB_BLANK_UNBLANK; } -- 2.11.0.rc2