Orange Pi5 kernel

^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)  * GMA500 Backlight Interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (c) 2009-2011, Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Authors: Eric Knopp
^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 "psb_drv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "psb_intel_reg.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "psb_intel_drv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "intel_bios.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "power.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static void do_gma_backlight_set(struct drm_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	struct drm_psb_private *dev_priv = dev->dev_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	backlight_update_status(dev_priv->backlight_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) void gma_backlight_enable(struct drm_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	struct drm_psb_private *dev_priv = dev->dev_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	dev_priv->backlight_enabled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	if (dev_priv->backlight_device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		dev_priv->backlight_device->props.brightness = dev_priv->backlight_level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		do_gma_backlight_set(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #endif	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) void gma_backlight_disable(struct drm_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	struct drm_psb_private *dev_priv = dev->dev_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	dev_priv->backlight_enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	if (dev_priv->backlight_device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		dev_priv->backlight_device->props.brightness = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		do_gma_backlight_set(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #endif	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) void gma_backlight_set(struct drm_device *dev, int v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	struct drm_psb_private *dev_priv = dev->dev_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	dev_priv->backlight_level = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	if (dev_priv->backlight_device && dev_priv->backlight_enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		dev_priv->backlight_device->props.brightness = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 		do_gma_backlight_set(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #endif	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int gma_backlight_init(struct drm_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	struct drm_psb_private *dev_priv = dev->dev_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	dev_priv->backlight_enabled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	return dev_priv->ops->backlight_init(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) void gma_backlight_exit(struct drm_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	struct drm_psb_private *dev_priv = dev->dev_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	if (dev_priv->backlight_device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 		dev_priv->backlight_device->props.brightness = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 		backlight_update_status(dev_priv->backlight_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 		backlight_device_unregister(dev_priv->backlight_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }