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hid: hid-picolcd: Remove struct backlight_ops.check_fb

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Update the driver to initialize struct fb_info.bl_dev to its backlight
device, if any. Thus rely on the backlight core code to match backlight
and framebuffer devices, and remove the extra check_fb function from
struct backlight_ops.

v2:
	* protect against CONFIG_FB_BACKLIGHT (Javier, kernel test robot)
	* reword commit message (Daniel)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Bruno Prémont <bonbons@linux-vserver.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://lore.kernel.org/r/20240305162425.23845-5-tzimmermann@suse.de
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Thomas Zimmermann 2024-03-05 17:22:37 +01:00 committed by Lee Jones
parent e755554568
commit c34b107770
2 changed files with 6 additions and 7 deletions
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7
drivers/hid/hid-picolcd_backlight.c
View File

@ -9,7 +9,6 @@
#include <linux/hid.h>
#include <linux/fb.h>
#include <linux/backlight.h>
#include "hid-picolcd.h"
@ -39,15 +38,9 @@ static int picolcd_set_brightness(struct backlight_device *bdev)
return 0;
}
static int picolcd_check_bl_fb(struct backlight_device *bdev, struct fb_info *fb)
{
return fb && fb == picolcd_fbinfo((struct picolcd_data *)bl_get_data(bdev));
}
static const struct backlight_ops picolcd_blops = {
.update_status = picolcd_set_brightness,
.get_brightness = picolcd_get_brightness,
.check_fb = picolcd_check_bl_fb,
};
int picolcd_init_backlight(struct picolcd_data *data, struct hid_report *report)

6
drivers/hid/hid-picolcd_fb.c
View File

@ -493,6 +493,12 @@ int picolcd_init_framebuffer(struct picolcd_data *data)
info->fix = picolcdfb_fix;
info->fix.smem_len = PICOLCDFB_SIZE*8;
#ifdef CONFIG_FB_BACKLIGHT
#ifdef CONFIG_HID_PICOLCD_BACKLIGHT
info->bl_dev = data->backlight;
#endif
#endif
fbdata = info->par;
spin_lock_init(&fbdata->lock);
fbdata->picolcd = data;