Author: jhibbits
Date: Fri Dec 20 16:37:03 2013
New Revision: 259657
URL: http://svnweb.freebsd.org/changeset/base/259657
Log:
Add suspend/resume handlers for ATI backlight ppc driver.
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.
Modified:
head/sys/powerpc/powermac/atibl.c
Modified: head/sys/powerpc/powermac/atibl.c
==============================================================================
--- head/sys/powerpc/powermac/atibl.c Fri Dec 20 16:15:25 2013
(r259656)
+++ head/sys/powerpc/powermac/atibl.c Fri Dec 20 16:37:03 2013
(r259657)
@@ -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);
@@ -63,13 +68,17 @@ 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[] = {
/* Device interface */
- DEVMETHOD(device_identify, atibl_identify),
- DEVMETHOD(device_probe, atibl_probe),
- DEVMETHOD(device_attach, atibl_attach),
+ 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},
};
@@ -136,8 +145,8 @@ atibl_attach(device_t dev)
tree = device_get_sysctl_tree(dev);
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
- "level", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
- atibl_sysctl, "I", "Backlight level (0-100)");
+ "level", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
+ atibl_sysctl, "I", "Backlight level (0-100)");
return (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, i
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;
- lvds_gen_cntl |= (newlevel << RADEON_LVDS_BL_MOD_LEVEL_SHIFT) &
- RADEON_LVDS_BL_MOD_LEVEL_MASK;
- bus_write_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL, lvds_gen_cntl);
+
+ 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);
}
@@ -173,13 +209,39 @@ atibl_getlevel(struct atibl_softc *sc)
lvds_gen_cntl = bus_read_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL);
level = ((lvds_gen_cntl & RADEON_LVDS_BL_MOD_LEVEL_MASK) >>
- RADEON_LVDS_BL_MOD_LEVEL_SHIFT);
- level = ((level - 5) * 2) / 5;
+ 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)
{
struct atibl_softc *sc;
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