![Matthew Garrett](/assets/img/avatar_default.png)
Values such as max_brightness should be set before backlights are registered, but the current API doesn't allow that. Add a parameter to backlight_device_register and update drivers to ensure that they set this correctly. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
160 lines
4.3 KiB
C
160 lines
4.3 KiB
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;
|
|
}
|
|
}
|