156 lines
4.1 KiB
C
156 lines
4.1 KiB
C
/*
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* Copyright (C) 2009 Red Hat <mjg@redhat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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/*
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* Authors:
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* Matthew Garrett <mjg@redhat.com>
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*
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* Register locations derived from NVClock by Roderick Colenbrander
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*/
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#include <linux/backlight.h>
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#include "drmP.h"
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#include "nouveau_drv.h"
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#include "nouveau_drm.h"
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#include "nouveau_reg.h"
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static int nv40_get_intensity(struct backlight_device *bd)
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{
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struct drm_device *dev = bl_get_data(bd);
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int val = (nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK)
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>> 16;
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return val;
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}
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static int nv40_set_intensity(struct backlight_device *bd)
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{
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struct drm_device *dev = bl_get_data(bd);
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int val = bd->props.brightness;
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int reg = nv_rd32(dev, NV40_PMC_BACKLIGHT);
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nv_wr32(dev, NV40_PMC_BACKLIGHT,
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(val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
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return 0;
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}
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static struct backlight_ops nv40_bl_ops = {
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.options = BL_CORE_SUSPENDRESUME,
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.get_brightness = nv40_get_intensity,
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.update_status = nv40_set_intensity,
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};
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static int nv50_get_intensity(struct backlight_device *bd)
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{
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struct drm_device *dev = bl_get_data(bd);
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return nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT);
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}
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static int nv50_set_intensity(struct backlight_device *bd)
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{
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struct drm_device *dev = bl_get_data(bd);
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int val = bd->props.brightness;
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nv_wr32(dev, NV50_PDISPLAY_SOR_BACKLIGHT,
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val | NV50_PDISPLAY_SOR_BACKLIGHT_ENABLE);
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return 0;
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}
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static struct backlight_ops nv50_bl_ops = {
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.options = BL_CORE_SUSPENDRESUME,
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.get_brightness = nv50_get_intensity,
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.update_status = nv50_set_intensity,
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};
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static int nouveau_nv40_backlight_init(struct drm_device *dev)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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struct backlight_device *bd;
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if (!(nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
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return 0;
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bd = backlight_device_register("nv_backlight", &dev->pdev->dev, dev,
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&nv40_bl_ops);
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if (IS_ERR(bd))
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return PTR_ERR(bd);
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dev_priv->backlight = bd;
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bd->props.max_brightness = 31;
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bd->props.brightness = nv40_get_intensity(bd);
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backlight_update_status(bd);
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return 0;
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}
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static int nouveau_nv50_backlight_init(struct drm_device *dev)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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struct backlight_device *bd;
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if (!nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT))
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return 0;
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bd = backlight_device_register("nv_backlight", &dev->pdev->dev, dev,
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&nv50_bl_ops);
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if (IS_ERR(bd))
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return PTR_ERR(bd);
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dev_priv->backlight = bd;
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bd->props.max_brightness = 1025;
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bd->props.brightness = nv50_get_intensity(bd);
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backlight_update_status(bd);
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return 0;
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}
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int nouveau_backlight_init(struct drm_device *dev)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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switch (dev_priv->card_type) {
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case NV_40:
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return nouveau_nv40_backlight_init(dev);
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case NV_50:
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return nouveau_nv50_backlight_init(dev);
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default:
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break;
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}
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return 0;
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}
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void nouveau_backlight_exit(struct drm_device *dev)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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if (dev_priv->backlight) {
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backlight_device_unregister(dev_priv->backlight);
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dev_priv->backlight = NULL;
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}
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}
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