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Add suspend/resume handlers for ATI backlight ppc driver.

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With this, also shut shut off the display (DPMS-style) and disable the clocking
when the backlight level is set to 0.  This is taken from the radeonkms driver
(radeon_legacy_encoders.c) which doesn't yet support PowerPC, and won't for a
while, as it's missing full AGP support.
This commit is contained in:
jhibbits 2013-12-20 16:37:03 +00:00
parent a13c7f1bac
commit ee84c03232
1 changed files with 76 additions and 14 deletions
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70
sys/powerpc/powermac/atibl.c
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@ -52,10 +52,15 @@ __FBSDID("$FreeBSD$");
#define RADEON_LVDS_BL_MOD_EN (1 << 16)
#define RADEON_LVDS_DIGON (1 << 18)
#define RADEON_LVDS_BLON (1 << 19)
#define RADEON_LVDS_PLL_CNTL 0x02d4
#define RADEON_LVDS_PLL_EN (1 << 16)
#define RADEON_LVDS_PLL_RESET (1 << 17)
#define RADEON_PIXCLKS_CNTL 0x002d
#define RADEON_PIXCLK_LVDS_ALWAYS_ONb (1 << 14)
struct atibl_softc {
device_t dev;
struct resource *sc_memr;
int sc_level;
};
static void atibl_identify(driver_t *driver, device_t parent);
@ -63,6 +68,8 @@ static int atibl_probe(device_t dev);
static int atibl_attach(device_t dev);
static int atibl_setlevel(struct atibl_softc *sc, int newlevel);
static int atibl_getlevel(struct atibl_softc *sc);
static int atibl_resume(device_t dev);
static int atibl_suspend(device_t dev);
static int atibl_sysctl(SYSCTL_HANDLER_ARGS);
static device_method_t atibl_methods[] = {
@ -70,6 +77,8 @@ static device_method_t atibl_methods[] = {
DEVMETHOD(device_identify, atibl_identify),
DEVMETHOD(device_probe, atibl_probe),
DEVMETHOD(device_attach, atibl_attach),
DEVMETHOD(device_suspend, atibl_suspend),
DEVMETHOD(device_resume, atibl_resume),
{0, 0},
};
@ -146,6 +155,8 @@ static int
atibl_setlevel(struct atibl_softc *sc, int newlevel)
{
uint32_t lvds_gen_cntl;
uint32_t lvds_pll_cntl;
uint32_t pixclks_cntl;
if (newlevel > 100)
newlevel = 100;
@ -153,13 +164,38 @@ atibl_setlevel(struct atibl_softc *sc, int newlevel)
if (newlevel < 0)
newlevel = 0;
newlevel = (newlevel * 5) / 2 + 5;
lvds_gen_cntl = bus_read_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL);
lvds_gen_cntl |= RADEON_LVDS_BL_MOD_EN;
lvds_gen_cntl &= ~RADEON_LVDS_BL_MOD_LEVEL_MASK;
if (newlevel > 0) {
newlevel = (newlevel * 5) / 2 + 5;
lvds_pll_cntl = bus_read_4(sc->sc_memr, RADEON_LVDS_PLL_CNTL);
lvds_pll_cntl |= RADEON_LVDS_PLL_EN;
bus_write_4(sc->sc_memr, RADEON_LVDS_PLL_CNTL, lvds_pll_cntl);
lvds_pll_cntl &= ~RADEON_LVDS_PLL_RESET;
bus_write_4(sc->sc_memr, RADEON_LVDS_PLL_CNTL, lvds_pll_cntl);
lvds_gen_cntl &= ~(RADEON_LVDS_DISPLAY_DIS |
RADEON_LVDS_BL_MOD_LEVEL_MASK);
lvds_gen_cntl |= RADEON_LVDS_ON | RADEON_LVDS_EN |
RADEON_LVDS_DIGON | RADEON_LVDS_BLON;
lvds_gen_cntl |= (newlevel << RADEON_LVDS_BL_MOD_LEVEL_SHIFT) &
RADEON_LVDS_BL_MOD_LEVEL_MASK;
lvds_gen_cntl |= RADEON_LVDS_BL_MOD_EN;
DELAY(2000);
bus_write_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL, lvds_gen_cntl);
} else {
pixclks_cntl = bus_read_4(sc->sc_memr, RADEON_PIXCLKS_CNTL);
bus_write_4(sc->sc_memr, RADEON_PIXCLKS_CNTL,
pixclks_cntl & ~RADEON_PIXCLK_LVDS_ALWAYS_ONb);
lvds_gen_cntl |= RADEON_LVDS_DISPLAY_DIS;
lvds_gen_cntl &= RADEON_LVDS_BL_MOD_EN;
bus_write_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL, lvds_gen_cntl);
lvds_gen_cntl &= ~(RADEON_LVDS_ON | RADEON_LVDS_EN);
DELAY(2000);
bus_write_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL, lvds_gen_cntl);
bus_write_4(sc->sc_memr, RADEON_PIXCLKS_CNTL, pixclks_cntl);
}
return (0);
}
@ -174,11 +210,37 @@ atibl_getlevel(struct atibl_softc *sc)
level = ((lvds_gen_cntl & RADEON_LVDS_BL_MOD_LEVEL_MASK) >>
RADEON_LVDS_BL_MOD_LEVEL_SHIFT);
if (level != 0)
level = ((level - 5) * 2) / 5;
return (level);
}
static int
atibl_suspend(device_t dev)
{
struct atibl_softc *sc;
sc = device_get_softc(dev);
sc->sc_level = atibl_getlevel(sc);
atibl_setlevel(sc, 0);
return (0);
}
static int
atibl_resume(device_t dev)
{
struct atibl_softc *sc;
sc = device_get_softc(dev);
atibl_setlevel(sc, sc->sc_level);
return (0);
}
static int
atibl_sysctl(SYSCTL_HANDLER_ARGS)
{