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Groups > linux.kernel > #1493919
| From | Peter Ujfalusi <peter.ujfalusi@ti.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 2/2] backlight: pwm_bl: Check the pwm state for initial backlight power state |
| Date | 2016-09-30 09:10 +0200 |
| Message-ID | <sn07f-73F-5@gated-at.bofh.it> (permalink) |
| References | <sn07f-73F-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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.ujfalusi@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
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[PATCH 2/2] backlight: pwm_bl: Check the pwm state for initial backlight power state Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-09-30 09:10 +0200
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