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Implement new get_property feature for backlight control 

This should keep the backlight value reported by xrandr --prop & xbacklight
consistent with changes by other software in the system (like the hotkey driver
or kernel backlight driver).
This commit is contained in:
Jesse Barnes 2008-03-06 13:55:13 -08:00
parent 502e41f6df
commit be08b61540
1 changed files with 32 additions and 0 deletions
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32
src/i830_lvds.c
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@ -851,6 +851,35 @@ i830_lvds_set_property(xf86OutputPtr output, Atom property,
}
#endif /* RANDR_12_INTERFACE */
#ifdef RANDR_13_INTERFACE
static Bool
i830_lvds_get_property(xf86OutputPtr output, Atom property)
{
ScrnInfoPtr pScrn = output->scrn;
I830Ptr pI830 = I830PTR(pScrn);
I830OutputPrivatePtr intel_output = output->driver_private;
struct i830_lvds_priv *dev_priv = intel_output->dev_priv;
int ret;
/*
* Only need to update properties that might change out from under
* us. The others will be cached by the randr core code.
*/
if (property == backlight_atom) {
int val;
val = dev_priv->get_backlight(output);
dev_priv->backlight_duty_cycle = val;
ret = RRChangeOutputProperty(output->randr_output, backlight_atom,
XA_INTEGER, 32, PropModeReplace, 1, &val,
FALSE, TRUE);
if (ret != Success)
return FALSE;
}
return TRUE;
}
#endif /* RANDR_13_INTERFACE */
static const xf86OutputFuncsRec i830_lvds_output_funcs = {
.create_resources = i830_lvds_create_resources,
.dpms = i830_lvds_dpms,
@ -865,6 +894,9 @@ static const xf86OutputFuncsRec i830_lvds_output_funcs = {
.get_modes = i830_lvds_get_modes,
#ifdef RANDR_12_INTERFACE
.set_property = i830_lvds_set_property,
#endif
#ifdef RANDR_13_INTERFACE
.get_property = i830_lvds_get_property,
#endif
.destroy = i830_lvds_destroy
};