// SPDX-License-Identifier: GPL-2.0-only /************************************************************************** * Copyright (c) 2007, Intel Corporation. * * Authors: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> **************************************************************************/ #include <drm/drmP.h> #include "psb_drv.h" #include "psb_reg.h" #include "psb_intel_reg.h" #include <linux/spinlock.h> static void psb_lid_timer_func(struct timer_list *t) { struct drm_psb_private *dev_priv = from_timer(dev_priv, t, lid_timer); struct drm_device *dev = (struct drm_device *)dev_priv->dev; struct timer_list *lid_timer = &dev_priv->lid_timer; unsigned long irq_flags; u32 __iomem *lid_state = dev_priv->opregion.lid_state; u32 pp_status; if (readl(lid_state) == dev_priv->lid_last_state) goto lid_timer_schedule; if ((readl(lid_state)) & 0x01) { /*lid state is open*/ REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | POWER_TARGET_ON); do { pp_status = REG_READ(PP_STATUS); } while ((pp_status & PP_ON) == 0 && (pp_status & PP_SEQUENCE_MASK) != 0); if (REG_READ(PP_STATUS) & PP_ON) { /*FIXME: should be backlight level before*/ psb_intel_lvds_set_brightness(dev, 100); } else { DRM_DEBUG("LVDS panel never powered up"); return; } } else { psb_intel_lvds_set_brightness(dev, 0); REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & ~POWER_TARGET_ON); do { pp_status = REG_READ(PP_STATUS); } while ((pp_status & PP_ON) == 0); } dev_priv->lid_last_state = readl(lid_state); lid_timer_schedule: spin_lock_irqsave(&dev_priv->lid_lock, irq_flags); if (!timer_pending(lid_timer)) { lid_timer->expires = jiffies + PSB_LID_DELAY; add_timer(lid_timer); } spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags); } void psb_lid_timer_init(struct drm_psb_private *dev_priv) { struct timer_list *lid_timer = &dev_priv->lid_timer; unsigned long irq_flags; spin_lock_init(&dev_priv->lid_lock); spin_lock_irqsave(&dev_priv->lid_lock, irq_flags); timer_setup(lid_timer, psb_lid_timer_func, 0); lid_timer->expires = jiffies + PSB_LID_DELAY; add_timer(lid_timer); spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags); } void psb_lid_timer_takedown(struct drm_psb_private *dev_priv) { del_timer_sync(&dev_priv->lid_timer); }