port over ironlake fdi/dpms code from 2.6.34 kernelHEADrhel5master

1 files changed, 12 insertions, 26 deletions

diff --git a/src/i830_lvds.c b/src/i830_lvds.c
index 4d9cb6be..ce6910fd 100644
--- a/src/i830_lvds.c
+++ b/src/i830_lvds.c
@@ -404,61 +404,47 @@ i830SetLVDSPanelPower(xf86OutputPtr output, Bool on)
     struct i830_lvds_priv   *dev_priv = intel_output->dev_priv;
     ScrnInfoPtr		    pScrn = output->scrn;
     I830Ptr		    pI830 = I830PTR(pScrn);
-    CARD32		    pp_status, ctl_reg, status_reg;
+    CARD32		    pp_status, ctl_reg, status_reg, lvds_reg;
 
     if (IS_IGDNG(pI830)) {
 	ctl_reg = PCH_PP_CONTROL;
 	status_reg = PCH_PP_STATUS;
+	lvds_reg = PCH_LVDS;
     } else {
 	ctl_reg = PP_CONTROL;
 	status_reg = PP_STATUS;
-    }
-
-    if (IS_IGDNG(pI830)) {
-	CARD32 temp;
-	if (on) {
-	    temp = INREG(PCH_LVDS);
-	    OUTREG(PCH_LVDS, temp | PORT_ENABLE);
-	    temp = INREG(PCH_LVDS);
-	} else {
-	    temp = INREG(PCH_LVDS);
-	    OUTREG(PCH_LVDS, temp & ~PORT_ENABLE);
-	    temp = INREG(PCH_LVDS);
-	}
-	usleep(100);
+	lvds_reg = LVDS;
     }
 
     if (on) {
-	/*
-	 * If we're going from off->on we may need to turn on the backlight.
-	 * We should use the saved value whenever possible, but on some
-	 * machines 0 is a valid backlight value (due to an external backlight
-	 * controller for example), so on them, when turning LVDS back on,
-	 * they'll always re-maximize the brightness.
-	 */
+	OUTREG(lvds_reg, INREG(lvds_reg) | LVDS_PORT_EN);
+	INREG(lvds_reg);
+
 	if (!(INREG(ctl_reg) & POWER_TARGET_ON) &&
 	    dev_priv->backlight_duty_cycle == 0)
 	    dev_priv->backlight_duty_cycle = dev_priv->backlight_max;
 
 	OUTREG(ctl_reg, INREG(ctl_reg) | POWER_TARGET_ON);
+	INREG(ctl_reg);
 	do {
 	    pp_status = INREG(status_reg);
 	} while ((pp_status & PP_ON) == 0);
 
+	/* set backlight */
 	dev_priv->set_backlight(output, dev_priv->backlight_duty_cycle);
     } else {
-	/*
-	 * Only save the current backlight value if we're going from
-	 * on to off.
-	 */
 	if (INREG(ctl_reg) & POWER_TARGET_ON)
 	    dev_priv->backlight_duty_cycle = dev_priv->get_backlight(output);
 	dev_priv->set_backlight(output, 0);
 
 	OUTREG(ctl_reg, INREG(ctl_reg) & ~POWER_TARGET_ON);
+	INREG(ctl_reg);
 	do {
 	    pp_status = INREG(status_reg);
 	} while (pp_status & PP_ON);
+	
+	OUTREG(lvds_reg, INREG(lvds_reg) & ~LVDS_PORT_EN);
+	INREG(lvds_reg);
     }
 }