1 files changed, 80 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/psb_lid.c b/drivers/gpu/drm/gma500/psb_lid.c
new file mode 100644
index 000000000..58a7fe392
--- /dev/null
+++ b/drivers/gpu/drm/gma500/psb_lid.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/**************************************************************************
+ * Copyright (c) 2007, Intel Corporation.
+ *
+ * Authors: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
+ **************************************************************************/
+
+#include <linux/spinlock.h>
+
+#include "psb_drv.h"
+#include "psb_intel_reg.h"
+#include "psb_reg.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);
+}
+