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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 51 franklin st fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 111 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000436.567572064@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/**************************************************************************
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* Copyright (c) 2007, Intel Corporation.
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*
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* Authors: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
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**************************************************************************/
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#include <drm/drmP.h>
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#include "psb_drv.h"
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#include "psb_reg.h"
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#include "psb_intel_reg.h"
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#include <linux/spinlock.h>
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static void psb_lid_timer_func(struct timer_list *t)
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{
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struct drm_psb_private *dev_priv = from_timer(dev_priv, t, lid_timer);
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struct drm_device *dev = (struct drm_device *)dev_priv->dev;
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struct timer_list *lid_timer = &dev_priv->lid_timer;
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unsigned long irq_flags;
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u32 __iomem *lid_state = dev_priv->opregion.lid_state;
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u32 pp_status;
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if (readl(lid_state) == dev_priv->lid_last_state)
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goto lid_timer_schedule;
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if ((readl(lid_state)) & 0x01) {
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/*lid state is open*/
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REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | POWER_TARGET_ON);
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do {
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pp_status = REG_READ(PP_STATUS);
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} while ((pp_status & PP_ON) == 0 &&
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(pp_status & PP_SEQUENCE_MASK) != 0);
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if (REG_READ(PP_STATUS) & PP_ON) {
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/*FIXME: should be backlight level before*/
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psb_intel_lvds_set_brightness(dev, 100);
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} else {
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DRM_DEBUG("LVDS panel never powered up");
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return;
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}
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} else {
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psb_intel_lvds_set_brightness(dev, 0);
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REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & ~POWER_TARGET_ON);
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do {
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pp_status = REG_READ(PP_STATUS);
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} while ((pp_status & PP_ON) == 0);
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}
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dev_priv->lid_last_state = readl(lid_state);
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lid_timer_schedule:
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spin_lock_irqsave(&dev_priv->lid_lock, irq_flags);
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if (!timer_pending(lid_timer)) {
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lid_timer->expires = jiffies + PSB_LID_DELAY;
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add_timer(lid_timer);
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}
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spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags);
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}
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void psb_lid_timer_init(struct drm_psb_private *dev_priv)
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{
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struct timer_list *lid_timer = &dev_priv->lid_timer;
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unsigned long irq_flags;
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spin_lock_init(&dev_priv->lid_lock);
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spin_lock_irqsave(&dev_priv->lid_lock, irq_flags);
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timer_setup(lid_timer, psb_lid_timer_func, 0);
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lid_timer->expires = jiffies + PSB_LID_DELAY;
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add_timer(lid_timer);
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spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags);
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}
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void psb_lid_timer_takedown(struct drm_psb_private *dev_priv)
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{
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del_timer_sync(&dev_priv->lid_timer);
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}
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