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LinuxKPI: Implement backlight_enable and backlight_disable functions

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For now, disable backlight if brightness level is set to 0.
In the future we may implement separate knob in backlight(8).

Required by drm-kmod v5.6

Reviewed by:	hselasky, manu
Differential revision:	https://reviews.freebsd.org/D32165

(cherry picked from commit b52e363840)
This commit is contained in:
Vladimir Kondratyev 2021-09-29 23:15:12 +03:00
parent f2a3116ab4
commit 9441d948aa
2 changed files with 22 additions and 2 deletions
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22
sys/compat/linuxkpi/common/include/linux/backlight.h
View file

@ -79,10 +79,10 @@ void linux_backlight_device_unregister(struct backlight_device *bd);
linux_backlight_device_register(name, dev, data, ops, props)
#define backlight_device_unregister(bd) linux_backlight_device_unregister(bd)
static inline void
static inline int
backlight_update_status(struct backlight_device *bd)
{
bd->ops->update_status(bd);
return (bd->ops->update_status(bd));
}
static inline void
@ -91,4 +91,22 @@ backlight_force_update(struct backlight_device *bd, int reason)
bd->props.brightness = bd->ops->get_brightness(bd);
}
static inline int
backlight_enable(struct backlight_device *bd)
{
if (bd == NULL)
return (0);
bd->props.power = 0/* FB_BLANK_UNBLANK */;
return (backlight_update_status(bd));
}
static inline int
backlight_disable(struct backlight_device *bd)
{
if (bd == NULL)
return (0);
bd->props.power = 4/* FB_BLANK_POWERDOWN */;
return (backlight_update_status(bd));
}
#endif /* _LINUX_BACKLIGHT_H_ */

2
sys/compat/linuxkpi/common/src/linux_pci.c
View file

@ -1159,6 +1159,8 @@ linux_backlight_update_status(device_t dev, struct backlight_props *props)
pdev->dev.bd->props.brightness = pdev->dev.bd->props.max_brightness *
props->brightness / 100;
pdev->dev.bd->props.power = props->brightness == 0 ?
4/* FB_BLANK_POWERDOWN */ : 0/* FB_BLANK_UNBLANK */;
return (pdev->dev.bd->ops->update_status(pdev->dev.bd));
}