^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /***************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org> *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Based on Logitech G13 driver (v0.4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu> *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) ***************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/hid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/fb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/backlight.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "hid-picolcd.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static int picolcd_get_brightness(struct backlight_device *bdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct picolcd_data *data = bl_get_data(bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) return data->lcd_brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static int picolcd_set_brightness(struct backlight_device *bdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct picolcd_data *data = bl_get_data(bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct hid_report *report = picolcd_out_report(REPORT_BRIGHTNESS, data->hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) data->lcd_brightness = bdev->props.brightness & 0x0ff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) data->lcd_power = bdev->props.power;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) spin_lock_irqsave(&data->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) hid_set_field(report->field[0], 0, data->lcd_power == FB_BLANK_UNBLANK ? data->lcd_brightness : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) if (!(data->status & PICOLCD_FAILED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) hid_hw_request(data->hdev, report, HID_REQ_SET_REPORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) spin_unlock_irqrestore(&data->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static int picolcd_check_bl_fb(struct backlight_device *bdev, struct fb_info *fb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return fb && fb == picolcd_fbinfo((struct picolcd_data *)bl_get_data(bdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static const struct backlight_ops picolcd_blops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) .update_status = picolcd_set_brightness,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) .get_brightness = picolcd_get_brightness,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) .check_fb = picolcd_check_bl_fb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) int picolcd_init_backlight(struct picolcd_data *data, struct hid_report *report)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct device *dev = &data->hdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct backlight_device *bdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct backlight_properties props;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (!report)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) report->field[0]->report_size != 8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) dev_err(dev, "unsupported BRIGHTNESS report");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) memset(&props, 0, sizeof(props));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) props.type = BACKLIGHT_RAW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) props.max_brightness = 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) bdev = backlight_device_register(dev_name(dev), dev, data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) &picolcd_blops, &props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (IS_ERR(bdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) dev_err(dev, "failed to register backlight\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return PTR_ERR(bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) bdev->props.brightness = 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) data->lcd_brightness = 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) data->backlight = bdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) picolcd_set_brightness(bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) void picolcd_exit_backlight(struct picolcd_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct backlight_device *bdev = data->backlight;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) data->backlight = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) backlight_device_unregister(bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) int picolcd_resume_backlight(struct picolcd_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (!data->backlight)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return picolcd_set_brightness(data->backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) void picolcd_suspend_backlight(struct picolcd_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) int bl_power = data->lcd_power;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (!data->backlight)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) data->backlight->props.power = FB_BLANK_POWERDOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) picolcd_set_brightness(data->backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) data->lcd_power = data->backlight->props.power = bl_power;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #endif /* CONFIG_PM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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