[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / nouveau / nouveau_backlight.c

/*
 * Copyright (C) 2009 Red Hat <mjg@redhat.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

/*
 * Authors:
 *  Matthew Garrett <mjg@redhat.com>
 *
 * Register locations derived from NVClock by Roderick Colenbrander
 */

#include <linux/backlight.h>

#include "drmP.h"
#include "nouveau_drv.h"
#include "nouveau_drm.h"
#include "nouveau_reg.h"

static int nv40_get_intensity(struct backlight_device *bd)
{
	struct drm_device *dev = bl_get_data(bd);
	int val = (nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK)
									>> 16;

	return val;
}

static int nv40_set_intensity(struct backlight_device *bd)
{
	struct drm_device *dev = bl_get_data(bd);
	int val = bd->props.brightness;
	int reg = nv_rd32(dev, NV40_PMC_BACKLIGHT);

	nv_wr32(dev, NV40_PMC_BACKLIGHT,
		 (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));

	return 0;
}

static struct backlight_ops nv40_bl_ops = {
	.options = BL_CORE_SUSPENDRESUME,
	.get_brightness = nv40_get_intensity,
	.update_status = nv40_set_intensity,
};

static int nv50_get_intensity(struct backlight_device *bd)
{
	struct drm_device *dev = bl_get_data(bd);

	return nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT);
}

static int nv50_set_intensity(struct backlight_device *bd)
{
	struct drm_device *dev = bl_get_data(bd);
	int val = bd->props.brightness;

	nv_wr32(dev, NV50_PDISPLAY_SOR_BACKLIGHT,
		val | NV50_PDISPLAY_SOR_BACKLIGHT_ENABLE);
	return 0;
}

static struct backlight_ops nv50_bl_ops = {
	.options = BL_CORE_SUSPENDRESUME,
	.get_brightness = nv50_get_intensity,
	.update_status = nv50_set_intensity,
};

static int nouveau_nv40_backlight_init(struct drm_device *dev)
{
	struct backlight_properties props;
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct backlight_device *bd;

	if (!(nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
		return 0;

	memset(&props, 0, sizeof(struct backlight_properties));
	props.max_brightness = 31;
	bd = backlight_device_register("nv_backlight", &dev->pdev->dev, dev,
				       &nv40_bl_ops, &props);
	if (IS_ERR(bd))
		return PTR_ERR(bd);

	dev_priv->backlight = bd;
	bd->props.brightness = nv40_get_intensity(bd);
	backlight_update_status(bd);

	return 0;
}

static int nouveau_nv50_backlight_init(struct drm_device *dev)
{
	struct backlight_properties props;
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct backlight_device *bd;

	if (!nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT))
		return 0;

	memset(&props, 0, sizeof(struct backlight_properties));
	props.max_brightness = 1025;
	bd = backlight_device_register("nv_backlight", &dev->pdev->dev, dev,
				       &nv50_bl_ops, &props);
	if (IS_ERR(bd))
		return PTR_ERR(bd);

	dev_priv->backlight = bd;
	bd->props.brightness = nv50_get_intensity(bd);
	backlight_update_status(bd);
	return 0;
}

int nouveau_backlight_init(struct drm_device *dev)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;

	switch (dev_priv->card_type) {
	case NV_40:
		return nouveau_nv40_backlight_init(dev);
	case NV_50:
		return nouveau_nv50_backlight_init(dev);
	default:
		break;
	}

	return 0;
}

void nouveau_backlight_exit(struct drm_device *dev)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;

	if (dev_priv->backlight) {
		backlight_device_unregister(dev_priv->backlight);
		dev_priv->backlight = NULL;
	}
}
Commit	Line	Data
6ee73861 BS	1	/*
	2	* Copyright (C) 2009 Red Hat <mjg@redhat.com>
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining
	5	* a copy of this software and associated documentation files (the
	6	* "Software"), to deal in the Software without restriction, including
	7	* without limitation the rights to use, copy, modify, merge, publish,
	8	* distribute, sublicense, and/or sell copies of the Software, and to
	9	* permit persons to whom the Software is furnished to do so, subject to
	10	* the following conditions:
	11	*
	12	* The above copyright notice and this permission notice (including the
	13	* next paragraph) shall be included in all copies or substantial
	14	* portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	17	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	18	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
	19	* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
	20	* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
	21	* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
	22	* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	23	*
	24	*/
	25
	26	/*
	27	* Authors:
	28	* Matthew Garrett <mjg@redhat.com>
	29	*
	30	* Register locations derived from NVClock by Roderick Colenbrander
	31	*/
	32
	33	#include <linux/backlight.h>
	34
	35	#include "drmP.h"
	36	#include "nouveau_drv.h"
	37	#include "nouveau_drm.h"
	38	#include "nouveau_reg.h"
	39
	40	static int nv40_get_intensity(struct backlight_device *bd)
	41	{
	42	struct drm_device *dev = bl_get_data(bd);
	43	int val = (nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK)
	44	>> 16;
	45
	46	return val;
	47	}
	48
	49	static int nv40_set_intensity(struct backlight_device *bd)
	50	{
	51	struct drm_device *dev = bl_get_data(bd);
	52	int val = bd->props.brightness;
	53	int reg = nv_rd32(dev, NV40_PMC_BACKLIGHT);
	54
	55	nv_wr32(dev, NV40_PMC_BACKLIGHT,
	56	(val << 16) \| (reg & ~NV40_PMC_BACKLIGHT_MASK));
	57
	58	return 0;
	59	}
	60
	61	static struct backlight_ops nv40_bl_ops = {
	62	.options = BL_CORE_SUSPENDRESUME,
	63	.get_brightness = nv40_get_intensity,
	64	.update_status = nv40_set_intensity,
65	};
66
67	static int nv50_get_intensity(struct backlight_device *bd)
68	{
69	struct drm_device *dev = bl_get_data(bd);
70
71	return nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT);
72	}
73
74	static int nv50_set_intensity(struct backlight_device *bd)
75	{
76	struct drm_device *dev = bl_get_data(bd);
77	int val = bd->props.brightness;
78
79	nv_wr32(dev, NV50_PDISPLAY_SOR_BACKLIGHT,
80	val \| NV50_PDISPLAY_SOR_BACKLIGHT_ENABLE);
81	return 0;
82	}
83
84	static struct backlight_ops nv50_bl_ops = {
85	.options = BL_CORE_SUSPENDRESUME,
86	.get_brightness = nv50_get_intensity,
87	.update_status = nv50_set_intensity,
88	};
89
90	static int nouveau_nv40_backlight_init(struct drm_device *dev)
91	{
a19a6ee6	92	struct backlight_properties props;
6ee73861 BS	93	struct drm_nouveau_private *dev_priv = dev->dev_private;
	94	struct backlight_device *bd;
	95
	96	if (!(nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
	97	return 0;
	98
a19a6ee6 MG	99	memset(&props, 0, sizeof(struct backlight_properties));
a19a6ee6 MG	100	props.max_brightness = 31;
6ee73861	101	bd = backlight_device_register("nv_backlight", &dev->pdev->dev, dev,
a19a6ee6	102	&nv40_bl_ops, &props);
6ee73861 BS	103	if (IS_ERR(bd))
	104	return PTR_ERR(bd);
	105
	106	dev_priv->backlight = bd;
6ee73861 BS	107	bd->props.brightness = nv40_get_intensity(bd);
	108	backlight_update_status(bd);
	109
	110	return 0;
	111	}
	112
	113	static int nouveau_nv50_backlight_init(struct drm_device *dev)
	114	{
a19a6ee6	115	struct backlight_properties props;
6ee73861 BS	116	struct drm_nouveau_private *dev_priv = dev->dev_private;
	117	struct backlight_device *bd;
	118
	119	if (!nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT))
	120	return 0;
	121
a19a6ee6 MG	122	memset(&props, 0, sizeof(struct backlight_properties));
a19a6ee6 MG	123	props.max_brightness = 1025;
6ee73861	124	bd = backlight_device_register("nv_backlight", &dev->pdev->dev, dev,
a19a6ee6	125	&nv50_bl_ops, &props);
6ee73861 BS	126	if (IS_ERR(bd))
	127	return PTR_ERR(bd);
	128
	129	dev_priv->backlight = bd;
6ee73861 BS	130	bd->props.brightness = nv50_get_intensity(bd);
	131	backlight_update_status(bd);
	132	return 0;
	133	}
	134
	135	int nouveau_backlight_init(struct drm_device *dev)
	136	{
	137	struct drm_nouveau_private *dev_priv = dev->dev_private;
	138
	139	switch (dev_priv->card_type) {
	140	case NV_40:
	141	return nouveau_nv40_backlight_init(dev);
	142	case NV_50:
	143	return nouveau_nv50_backlight_init(dev);
	144	default:
	145	break;
	146	}
	147
	148	return 0;
	149	}
	150
	151	void nouveau_backlight_exit(struct drm_device *dev)
	152	{
	153	struct drm_nouveau_private *dev_priv = dev->dev_private;
	154
	155	if (dev_priv->backlight) {
	156	backlight_device_unregister(dev_priv->backlight);
	157	dev_priv->backlight = NULL;
	158	}
	159	}