[src/trunk]: src/sys/dev/fdt Keep the backlight off while the lid is closed.

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/424e14893a6b
branches:  trunk
changeset: 322653:424e14893a6b
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Thu May 10 13:11:21 2018 +0000

description:
Keep the backlight off while the lid is closed.

diffstat:

 sys/dev/fdt/pwm_backlight.c |  36 +++++++++++++++++++++++++++++++++---
 1 files changed, 33 insertions(+), 3 deletions(-)

diffs (85 lines):

diff -r 659152136463 -r 424e14893a6b sys/dev/fdt/pwm_backlight.c
--- a/sys/dev/fdt/pwm_backlight.c       Thu May 10 13:05:18 2018 +0000
+++ b/sys/dev/fdt/pwm_backlight.c       Thu May 10 13:11:21 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pwm_backlight.c,v 1.3 2018/05/07 12:58:58 jmcneill Exp $ */
+/* $NetBSD: pwm_backlight.c,v 1.4 2018/05/10 13:11:21 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2018 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pwm_backlight.c,v 1.3 2018/05/07 12:58:58 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pwm_backlight.c,v 1.4 2018/05/10 13:11:21 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -50,6 +50,8 @@
        u_int                   sc_nlevels;
 
        char                    *sc_levelstr;
+
+       bool                    sc_lid_state;
 };
 
 static int     pwm_backlight_match(device_t, cfdata_t, void *);
@@ -122,6 +124,8 @@
        aprint_verbose(">");
        aprint_normal("\n");
 
+       sc->sc_lid_state = true;
+
        if (of_getprop_uint32(phandle, "default-brightness-level", &default_level) == 0) {
                /* set the default level now */
                pwm_backlight_set(sc, default_level);
@@ -247,7 +251,7 @@
 {
        struct pwm_backlight_softc * const sc = device_private(dev);
 
-       if (sc->sc_pin)
+       if (sc->sc_pin && sc->sc_lid_state)
                fdtbus_gpio_write(sc->sc_pin, 1);
 }
 
@@ -261,6 +265,28 @@
 }
 
 static void
+pwm_backlight_chassis_lid_open(device_t dev)
+{
+       struct pwm_backlight_softc * const sc = device_private(dev);
+
+       sc->sc_lid_state = true;
+
+       if (sc->sc_pin)
+               fdtbus_gpio_write(sc->sc_pin, 1);
+}
+
+static void
+pwm_backlight_chassis_lid_close(device_t dev)
+{
+       struct pwm_backlight_softc * const sc = device_private(dev);
+
+       sc->sc_lid_state = false;
+
+       if (sc->sc_pin)
+               fdtbus_gpio_write(sc->sc_pin, 0);
+}
+
+static void
 pwm_backlight_display_brightness_up(device_t dev)
 {
        struct pwm_backlight_softc * const sc = device_private(dev);
@@ -289,6 +315,10 @@
            pwm_backlight_display_on, true);
        pmf_event_register(sc->sc_dev, PMFE_DISPLAY_OFF,
            pwm_backlight_display_off, true);
+       pmf_event_register(sc->sc_dev, PMFE_CHASSIS_LID_OPEN,
+           pwm_backlight_chassis_lid_open, true);
+       pmf_event_register(sc->sc_dev, PMFE_CHASSIS_LID_CLOSE,
+           pwm_backlight_chassis_lid_close, true);
        pmf_event_register(sc->sc_dev, PMFE_DISPLAY_BRIGHTNESS_UP,
            pwm_backlight_display_brightness_up, true);
        pmf_event_register(sc->sc_dev, PMFE_DISPLAY_BRIGHTNESS_DOWN,