[PATCH 2/2] backlight: pwm_bl: Check the pwm state for initial backlight power state

[Peter Ujfalusi]

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 <peter.ujfal...@ti.com>
---
 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 9bc4715bf116..e4326bbf807f 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -223,6 +223,10 @@ 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;
 }
 
-- 
2.10.0