linux-stable/drivers/video
Geert Uytterhoeven 892c7788c7 backlight: pwm_bl: Fix GPIO out for unimplemented .get_direction()
Commit 7613c92231 ("backlight: pwm_bl: Move the checks for initial
power state to a separate function") not just moved some code, but made
slight changes in semantics.

If a gpiochip doesn't implement the optional .get_direction() callback,
gpiod_get_direction always returns -EINVAL, which is never equal to
GPIOF_DIR_IN, leading to the GPIO not being configured for output.

To avoid this, invert the test and check for not GPIOF_DIR_OUT instead,
like the original code did.

This restores the display on r8a7740/armadillo.

Fixes: 7613c92231 ("backlight: pwm_bl: Move the checks for initial power state to a separate function")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
2017-04-19 19:59:44 +01:00
..
backlight backlight: pwm_bl: Fix GPIO out for unimplemented .get_direction() 2017-04-19 19:59:44 +01:00
console fbdev changes for v4.11: 2017-02-25 13:20:22 -08:00
fbdev Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-04-14 16:55:33 -07:00
logo treewide: replace obsolete _refok by __ref 2016-08-02 17:31:41 -04:00
display_timing.c
hdmi.c video: Add new aspect ratios for HDMI 2.0 2016-10-17 14:23:46 +02:00
Kconfig fbdev: sh_mipi_dsi: remove driver 2016-05-10 11:53:38 +03:00
Makefile
of_display_timing.c Merge branch 'drm/next/du' of git://linuxtv.org/pinchartl/media into drm-next 2016-11-16 09:39:21 +10:00
of_videomode.c video: Fix possible leak in of_get_videomode() 2015-08-10 15:11:12 +03:00
vgastate.c fbdev: vgastate: remove trailing whitespaces 2015-01-13 12:53:25 +02:00
videomode.c