===== drivers/video/aty/radeon_base.c 1.40 vs edited =====
--- 1.40/drivers/video/aty/radeon_base.c	2005-02-15 21:25:30 -05:00
+++ edited/drivers/video/aty/radeon_base.c	2005-02-17 20:30:48 -05:00
@@ -273,6 +273,9 @@
 #ifdef CONFIG_MTRR
 static int nomtrr = 0;
 #endif
+#if defined(CONFIG_PM) && defined(CONFIG_X86)
+int radeon_force_sleep = 0;
+#endif
 
 /*
  * prototypes
@@ -2535,6 +2538,10 @@
 			force_measure_pll = 1;
 		} else if (!strncmp(this_opt, "ignore_edid", 11)) {
 			ignore_edid = 1;
+#if defined(CONFIG_PM) && defined(CONFIG_X86)
+		} else if (!strncmp(this_opt, "force_sleep", 11)) {
+			radeon_force_sleep = 1;
+#endif
 		} else
 			mode_option = this_opt;
 	}
@@ -2574,3 +2581,5 @@
 MODULE_PARM_DESC(panel_yres, "int: set panel yres");
 module_param(mode_option, charp, 0);
 MODULE_PARM_DESC(mode_option, "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
+module_param(radeon_force_sleep, int, 0);
+MODULE_PARM_DESC(radeon_force_sleep, "bool: force ACPI sleep mode on untested machines");
===== drivers/video/aty/radeon_pm.c 1.10 vs edited =====
--- 1.10/drivers/video/aty/radeon_pm.c	2005-02-12 23:01:11 -05:00
+++ edited/drivers/video/aty/radeon_pm.c	2005-02-17 20:23:57 -05:00
@@ -25,8 +25,97 @@
 #include <asm/pmac_feature.h>
 #endif
 
+/* For detecting supported PC laptops */
+#ifdef CONFIG_X86
+#include <linux/dmi.h>
+#endif
+
 #include "ati_ids.h"
 
+#ifdef CONFIG_X86
+/* This array holds a list of supported PC laptops.
+ * Currently only few IBM models are tested.
+ * If you want to experiment, use dmidecode to find out
+ * vendor and product codes for Your laptop.
+ */
+static struct dmi_system_id __devinitdata radeonfb_dmi_table[] = {
+	{
+		.ident = "IBM ThinkPad R40 (2722-B3G)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "2722B3G"),
+		},
+	},
+	{
+		.ident = "IBM ThinkPad R51 (1829-9MG)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "18299MG"),
+  	      },
+	},
+	{
+		.ident = "IBM ThinkPad T40 (2373-92G)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "237392G"),
+  	      },
+	},
+	{
+		.ident = "IBM ThinkPad T40 (2373-8CG)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "23738CG"),
+		},
+	},
+	{
+		.ident = "IBM ThinkPad T40 (2373-94U)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "237394U"),
+		},
+	},
+	{
+		.ident = "IBM ThinkPad T40p (2373-G1U)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "2373G1U"),
+		},
+	},
+	{
+		.ident = "IBM ThinkPad T41 (2373-2FG)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "23732FG"),
+		},
+	},
+	{
+		.ident = "IBM ThinkPad T41 (2378-DEU)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "2378DEU"),
+		},
+	},
+	{
+		/* Reported by Volker Braun <vbraun@physics.upenn.edu> */
+		.ident = "IBM ThinkPad T41 (2379-DJU)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "2379DJU"),
+		},
+	},
+	{
+		.ident = "IBM ThinkPad T42 (2373-FWG)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "2373FWG"),
+		},
+	},
+	{ },
+};
+
+extern int radeon_force_sleep;
+#endif
+
 void radeon_pm_disable_dynamic_mode(struct radeonfb_info *rinfo)
 {
 	u32 tmp;
@@ -853,6 +942,13 @@
 	tmp = INPLL( pllMCLK_MISC) | MCLK_MISC__EN_MCLK_TRISTATE_IN_SUSPEND;
 	OUTPLL( pllMCLK_MISC, tmp);
 	
+ 	/* BUS_CNTL1__MOBILE_PLATORM_SEL setting is northbridge chipset
+ 	 * and radeon chip dependent. Thus we only enable it on Mac for
+ 	 * now (until we get more info on how to compute the correct 
+ 	 * value for various X86 bridges).
+ 	 */
+ 
+#ifdef CONFIG_PPC_PMAC
 	/* AGP PLL control */
 	if (rinfo->family <= CHIP_FAMILY_RV280) {
 		OUTREG(BUS_CNTL1, INREG(BUS_CNTL1) |  BUS_CNTL1__AGPCLK_VALID);
@@ -864,6 +960,7 @@
 		OUTREG(BUS_CNTL1, INREG(BUS_CNTL1));
 		OUTREG(BUS_CNTL1, (INREG(BUS_CNTL1) & ~0x4000) | 0x8000);
 	}
+#endif
 
 	OUTREG(CRTC_OFFSET_CNTL, (INREG(CRTC_OFFSET_CNTL)
 				  & ~CRTC_OFFSET_CNTL__CRTC_STEREO_SYNC_OUT_EN));
@@ -2750,6 +2847,29 @@
 #endif
 	}
 #endif /* defined(CONFIG_PM) && defined(CONFIG_PPC_OF) */
+
+/* The PM code also works on some PC laptops.
+ * Only a few models are actually tested so Your mileage may vary.
+ * We can do D2 on at least M7 and M9 on some IBM ThinkPad T41 models.
+ */
+#if defined(CONFIG_PM) && defined(CONFIG_X86)
+	if (radeon_force_sleep || dmi_check_system(radeonfb_dmi_table)) {
+		if (radeon_force_sleep)
+			printk("radeonfb: forcefully enabling sleep mode\n");
+		else
+			printk("radeonfb: enabling sleep mode\n");
+
+		if (rinfo->is_mobility && rinfo->pm_reg &&
+		    rinfo->family <= CHIP_FAMILY_RV250)
+			rinfo->pm_mode |= radeon_pm_d2;
+
+		/* Power down TV DAC, that saves a significant amount of power,
+		 * we'll have something better once we actually have some TVOut
+		 * support
+		 */
+		OUTREG(TV_DAC_CNTL, INREG(TV_DAC_CNTL) | 0x07000000);
+	}
+#endif /* defined(CONFIG_PM) && defined(CONFIG_X86) */
 }
 
 void radeonfb_pm_exit(struct radeonfb_info *rinfo)