Re-implement the power management.

There's two choices when fb is or isn't loaded as we treat ourselves as a
    PCI driver in the latter case.
If we are a PCI driver, then register the suspend/resume functions
    directly. If not, then we register as a sysdev and pick up the
    suspend/resume actions and pump them down into a generic *power
    function.
It'll be nice when this little mess is sorted out with regard to being a
    real PCI driver ;-/

1 files changed, 140 insertions, 0 deletions

diff --git a/shared-core/i915_pm.c b/shared-core/i915_pm.c
new file mode 100644
index 00000000..17451319
--- /dev/null
+++ b/shared-core/i915_pm.c
@@ -0,0 +1,140 @@
+/* i915_pm.c -- Power management support for the i915 -*- linux-c -*-
+ */
+/**************************************************************************
+ * 
+ * Copyright 2004 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ **************************************************************************/
+
+#define __NO_VERSION__
+#include "drmP.h"
+#include "drm.h"
+#include "i915_drm.h"
+#include "i915_drv.h"
+
+
+/** 
+ * Set DPMS mode. 
+ */
+static int i915_set_dpms(drm_device_t *dev, int mode)
+{
+	drm_i915_private_t *dev_priv =
+		(drm_i915_private_t *)dev->dev_private;
+	unsigned sr01, adpa, ppcr, dvob, dvoc, lvds;
+	
+	DRM_DEBUG("%s mode=%d\n", __FUNCTION__, mode);
+
+	I915_WRITE( SRX_INDEX, SR01 );
+	sr01 = I915_READ( SRX_DATA );
+
+	adpa = I915_READ( ADPA );
+	ppcr = I915_READ( PPCR );
+	dvoc = I915_READ( DVOC );
+	dvob = I915_READ( DVOB );
+	lvds = I915_READ( LVDS );
+
+	switch(mode) {
+		case 0:
+			/* On */
+			sr01 &= ~SR01_SCREEN_OFF;
+			adpa = (adpa & ADPA_DPMS_MASK) | ADPA_DPMS_ON;
+#if 0
+			I915_WRITE( LVDS, lvds | LVDS_ON ); /* Power on LVDS */
+#endif
+			I915_WRITE( PPCR, dev_priv->ppcr ); /* Power up panel */
+			I915_WRITE( DVOC, dev_priv->dvoc );
+			I915_WRITE( DVOB, dev_priv->dvob );
+			break;
+
+		case 1:
+			/* Standby */
+			sr01 |= SR01_SCREEN_OFF; 
+			adpa = (adpa & ADPA_DPMS_MASK) | ADPA_DPMS_STANDBY;
+			I915_WRITE( PPCR, ppcr & ~PPCR_ON ); /* Power off panel*/
+#if 0
+			I915_WRITE( LVDS, lvds & ~LVDS_ON ); /* Power off LVDS */
+#endif
+			I915_WRITE( DVOC, dvoc & ~DVOC_ON );
+			I915_WRITE( DVOB, dvob & ~DVOB_ON );
+			break;
+
+		case 2:
+			/* Suspend */
+			sr01 |= SR01_SCREEN_OFF; 
+			adpa = (adpa & ADPA_DPMS_MASK) | ADPA_DPMS_SUSPEND;
+			I915_WRITE( PPCR, ppcr & ~PPCR_ON ); /* Power off panel*/
+#if 0
+			I915_WRITE( LVDS, lvds & ~LVDS_ON ); /* Power off LVDS */
+#endif
+			I915_WRITE( DVOC, dvoc & ~DVOC_ON );
+			I915_WRITE( DVOB, dvob & ~DVOB_ON );
+			break;
+
+		case 3:
+			/* Off */
+			sr01 |= SR01_SCREEN_OFF; 
+			adpa = (adpa & ADPA_DPMS_MASK) | ADPA_DPMS_OFF;
+			I915_WRITE( PPCR, ppcr & ~PPCR_ON ); /* Power off panel*/
+#if 0
+			I915_WRITE( LVDS, lvds & ~LVDS_ON ); /* Power off LVDS */
+#endif
+			I915_WRITE( DVOC, dvoc & ~DVOC_ON );
+			I915_WRITE( DVOB, dvob & ~DVOB_ON );
+			break;
+	}
+	
+	I915_WRITE( SRX_DATA, sr01 );
+ 	
+	I915_WRITE( ADPA, adpa );
+
+	return 0;
+}
+
+int i915_suspend( struct pci_dev *pdev, unsigned state ) 
+{
+	drm_device_t *dev = (drm_device_t *)pci_get_drvdata(pdev);
+
+	DRM_DEBUG("%s state=%d\n", __FUNCTION__, state);
+
+	switch(state) {
+		case 0:
+			/* D0: set DPMS mode on */
+			i915_set_dpms(dev, 0);
+			break;
+		case 1:
+			/* D1: set DPMS mode standby */
+			i915_set_dpms(dev, 1);
+			break;
+		case 2:
+			/* D2: set DPMS mode suspend */
+			i915_set_dpms(dev, 2);
+			break;
+		case 3:
+			/* D3: set DPMS mode off */
+			i915_set_dpms(dev, 3);
+			break;
+	}
+
+	return 0;
+}
+
+int i915_resume( struct pci_dev *pdev ) 
+{
+	drm_device_t *dev = (drm_device_t *)pci_get_drvdata(pdev);
+
+	/* D0: set DPMS mode on */
+	i915_set_dpms(dev, 0);
+
+	return 0;
+}
+
+int i915_power( drm_device_t *dev, unsigned int state )
+{
+	DRM_DEBUG("%s state=%d\n", __FUNCTION__, state);
+
+	/* D0: set DPMS mode on */
+	i915_set_dpms(dev, state);
+
+	return 0;
+}