add support for backlight control via machine dependent callbacks
This commit is contained in:
macallan
parent
f15c6971d1
commit
699e821c1d
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@ -1,4 +1,4 @@
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/* $NetBSD: genfb.c,v 1.30 2010/08/31 02:49:17 macallan Exp $ */
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/* $NetBSD: genfb.c,v 1.31 2010/10/06 02:24:35 macallan Exp $ */
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/*-
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* Copyright (c) 2007 Michael Lorenz
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@ -27,7 +27,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: genfb.c,v 1.30 2010/08/31 02:49:17 macallan Exp $");
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__KERNEL_RCSID(0, "$NetBSD: genfb.c,v 1.31 2010/10/06 02:24:35 macallan Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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@ -73,6 +73,13 @@ static int genfb_getcmap(struct genfb_softc *, struct wsdisplay_cmap *);
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static int genfb_putpalreg(struct genfb_softc *, uint8_t, uint8_t,
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uint8_t, uint8_t);
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static void genfb_brightness_up(device_t);
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static void genfb_brightness_down(device_t);
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/* set backlight level */
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static void genfb_set_backlight(struct genfb_softc *, int);
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/* turn backlight on and off without messing with the level */
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static void genfb_switch_backlight(struct genfb_softc *, int);
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extern const u_char rasops_cmap[768];
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static int genfb_cnattach_called = 0;
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@ -95,13 +102,16 @@ void
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genfb_init(struct genfb_softc *sc)
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{
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prop_dictionary_t dict;
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uint64_t cmap_cb, pmf_cb;
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uint64_t cmap_cb, pmf_cb, bl_cb;
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uint32_t fboffset;
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bool console;
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dict = device_properties(&sc->sc_dev);
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#ifdef GENFB_DEBUG
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printf(prop_dictionary_externalize(dict));
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#endif
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prop_dictionary_get_bool(dict, "is_console", &console);
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if (!prop_dictionary_get_uint32(dict, "width", &sc->sc_width)) {
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GPRINTF("no width property\n");
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return;
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@ -141,12 +151,35 @@ genfb_init(struct genfb_softc *sc)
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if (cmap_cb != 0)
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sc->sc_cmcb = (void *)(vaddr_t)cmap_cb;
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}
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/* optional pmf callback */
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sc->sc_pmfcb = NULL;
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if (prop_dictionary_get_uint64(dict, "pmf_callback", &pmf_cb)) {
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if (pmf_cb != 0)
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sc->sc_pmfcb = (void *)(vaddr_t)pmf_cb;
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}
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/* optional backlight control callback */
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sc->sc_backlight = NULL;
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if (prop_dictionary_get_uint64(dict, "backlight_callback", &bl_cb)) {
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if (bl_cb != 0) {
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sc->sc_backlight = (void *)(vaddr_t)bl_cb;
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sc->sc_backlight_on = 1;
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aprint_naive_dev(&sc->sc_dev,
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"enabling backlight control\n");
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sc->sc_backlight_level =
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sc->sc_backlight->gpc_get_parameter(
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sc->sc_backlight->gpc_cookie);
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if (console) {
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pmf_event_register(&sc->sc_dev,
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PMFE_DISPLAY_BRIGHTNESS_UP,
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genfb_brightness_up, TRUE);
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pmf_event_register(&sc->sc_dev,
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PMFE_DISPLAY_BRIGHTNESS_DOWN,
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genfb_brightness_down, TRUE);
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}
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}
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}
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}
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int
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@ -308,6 +341,7 @@ genfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag,
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struct genfb_softc *sc = vd->cookie;
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struct wsdisplay_fbinfo *wdf;
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struct vcons_screen *ms = vd->active;
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struct wsdisplay_param *param;
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int new_mode, error;
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switch (cmd) {
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@ -382,6 +416,37 @@ genfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag,
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#else
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return ENODEV;
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#endif
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case WSDISPLAYIO_GETPARAM:
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param = (struct wsdisplay_param *)data;
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if (sc->sc_backlight == NULL)
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return EPASSTHROUGH;
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switch (param->param) {
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case WSDISPLAYIO_PARAM_BRIGHTNESS:
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param->min = 0;
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param->max = 255;
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param->curval = sc->sc_backlight_level;
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return 0;
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case WSDISPLAYIO_PARAM_BACKLIGHT:
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param->min = 0;
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param->max = 1;
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param->curval = sc->sc_backlight_on;
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return 0;
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}
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return EPASSTHROUGH;
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case WSDISPLAYIO_SETPARAM:
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param = (struct wsdisplay_param *)data;
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if (sc->sc_backlight == NULL)
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return EPASSTHROUGH;
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switch (param->param) {
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case WSDISPLAYIO_PARAM_BRIGHTNESS:
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genfb_set_backlight(sc, param->curval);
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return 0;
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case WSDISPLAYIO_PARAM_BACKLIGHT:
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genfb_switch_backlight(sc, param->curval);
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return 0;
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}
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return EPASSTHROUGH;
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default:
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if (sc->sc_ops.genfb_ioctl)
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return sc->sc_ops.genfb_ioctl(sc, vs, cmd,
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@ -571,3 +636,59 @@ genfb_borrow(bus_addr_t addr, bus_space_handle_t *hdlp)
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return sc->sc_ops.genfb_borrow(sc, addr, hdlp);
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return 0;
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}
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static void
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genfb_set_backlight(struct genfb_softc *sc, int level)
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{
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KASSERT(sc->sc_backlight != NULL);
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/*
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* should we do nothing when backlight is off, should we just store the
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* level and use it when turning back on or should we just flip sc_bl_on
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* and turn the backlight on?
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* For now turn it on so a crashed screensaver can't get the user stuck
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* with a dark screen as long as hotkeys work
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*/
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if (level > 255) level = 255;
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if (level < 0) level = 0;
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if (level == sc->sc_backlight_level)
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return;
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sc->sc_backlight_level = level;
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if (sc->sc_backlight_on == 0)
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sc->sc_backlight_on = 1;
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sc->sc_backlight->gpc_set_parameter(
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sc->sc_backlight->gpc_cookie, level);
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}
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static void
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genfb_switch_backlight(struct genfb_softc *sc, int on)
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{
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int level;
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KASSERT(sc->sc_backlight != NULL);
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if (on == sc->sc_backlight_on)
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return;
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sc->sc_backlight_on = on;
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level = on ? sc->sc_backlight_level : 0;
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sc->sc_backlight->gpc_set_parameter(
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sc->sc_backlight->gpc_cookie, level);
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}
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static void
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genfb_brightness_up(device_t dev)
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{
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struct genfb_softc *sc = device_private(dev);
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genfb_set_backlight(sc, sc->sc_backlight_level + 8);
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}
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static void
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genfb_brightness_down(device_t dev)
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{
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struct genfb_softc *sc = device_private(dev);
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genfb_set_backlight(sc, sc->sc_backlight_level - 8);
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}
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@ -1,4 +1,4 @@
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/* $NetBSD: genfbvar.h,v 1.15 2010/08/31 02:49:17 macallan Exp $ */
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/* $NetBSD: genfbvar.h,v 1.16 2010/10/06 02:24:35 macallan Exp $ */
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/*-
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* Copyright (c) 2007 Michael Lorenz
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@ -27,7 +27,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: genfbvar.h,v 1.15 2010/08/31 02:49:17 macallan Exp $");
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__KERNEL_RCSID(0, "$NetBSD: genfbvar.h,v 1.16 2010/10/06 02:24:35 macallan Exp $");
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#ifndef GENFBVAR_H
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#define GENFBVAR_H
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@ -66,6 +66,12 @@ struct genfb_colormap_callback {
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void (*gcc_set_mapreg)(void *, int, int, int, int);
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};
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struct genfb_parameter_callback{
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void *gpc_cookie;
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void (*gpc_set_parameter)(void *, int);
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int (*gpc_get_parameter)(void *);
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};
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struct genfb_pmf_callback {
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bool (*gpc_suspend)(device_t, const pmf_qual_t *);
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bool (*gpc_resume)(device_t, const pmf_qual_t *);
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@ -81,6 +87,8 @@ struct genfb_softc {
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struct wsscreen_list sc_screenlist;
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struct genfb_colormap_callback *sc_cmcb;
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struct genfb_pmf_callback *sc_pmfcb;
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struct genfb_parameter_callback *sc_backlight;
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int sc_backlight_level, sc_backlight_on;
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void *sc_fbaddr; /* kva */
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#ifdef GENFB_SHADOWFB
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void *sc_shadowfb;
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