pm2fb: mtrr support and noaccel option

From: Krzysztof Helt <[email protected]>

This patch adds usage of MTRR registers and two new options:
noaccel and nomtrr.

---

The previous patch does not applied if the mm patches were applied. This one fixes it.

--- linux-2.6.21/drivers/video/pm2fb.c 2007-06-21
08:32:07.000000000 +0200
+++ linux-2.6.22/drivers/video/pm2fb.c 2007-06-21
08:30:09.000000000 +0200
@@ -38,6 +38,9 @@
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
+#ifdef CONFIG_MTRR
+#include <asm/mtrr.h>
+#endif

#include <video/permedia2.h>
#include <video/cvisionppc.h>
@@ -71,8 +74,13 @@ static char *mode __devinitdata = NULL;
* these flags allow the user to specify that requests for +ve sync
* should be silently turned in -ve sync.
*/
-static int lowhsync;
-static int lowvsync;
+static int lowhsync __devinitdata;
+static int lowvsync __devinitdata;
+static int noaccel __devinitdata;
+/* mtrr option */
+#ifdef CONFIG_MTRR
+static int nomtrr __devinitdata;
+#endif

/*
* The hardware state of the graphics card that isn't part of the
@@ -88,6 +96,7 @@ struct pm2fb_par
u32 mem_control; /* MemControl reg at probe */
u32 boot_address; /* BootAddress reg at probe */
u32 palette[16];
+ int mtrr_handle;
};

/*
@@ -1316,6 +1325,15 @@ static int __devinit pm2fb_probe(struct
goto err_exit_mmio;
}

+#ifdef CONFIG_MTRR
+ default_par->mtrr_handle = -1;
+ if (!nomtrr)
+ default_par->mtrr_handle =
+ mtrr_add(pm2fb_fix.smem_start,
+ pm2fb_fix.smem_len,
+ MTRR_TYPE_WRCOMB, 1);
+#endif
+
info->fbops = &pm2fb_ops;
info->fix = pm2fb_fix;
info->pseudo_palette = default_par->palette;
@@ -1324,6 +1342,11 @@ static int __devinit pm2fb_probe(struct
FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;

+ if (noaccel) {
+ printk(KERN_DEBUG "disabling acceleration\n");
+ info->flags |= FBINFO_HWACCEL_DISABLED;
+ }
+
if (!mode)
mode = "640x480@60";

@@ -1375,6 +1398,11 @@ static void __devexit pm2fb_remove(struc

unregister_framebuffer(info);

+#ifdef CONFIG_MTRR
+ if (par->mtrr_handle >= 0)
+ mtrr_del(par->mtrr_handle, info->fix.smem_start,
+ info->fix.smem_len);
+#endif /* CONFIG_MTRR */
iounmap(info->screen_base); release_mem_region(fix->smem_start, fix->smem_len); iounmap(par->v_regs);
@@ -1430,6 +1458,12 @@ static int __init pm2fb_setup(char *opti
lowhsync = 1;
} else if(!strcmp(this_opt, "lowvsync")) {
lowvsync = 1;
+#ifdef CONFIG_MTRR
+ } else if (!strncmp(this_opt, "nomtrr", 6)) {
+ nomtrr = 1;
+#endif
+ } else if (!strncmp(this_opt, "noaccel", 7)) {
+ noaccel = 1;
} else {
mode = this_opt;
}
@@ -1474,6 +1508,12 @@ module_param(lowhsync, bool, 0);
MODULE_PARM_DESC(lowhsync, "Force horizontal sync low regardless
of mode");
module_param(lowvsync, bool, 0); MODULE_PARM_DESC(lowvsync, "Force vertical sync low regardless
of mode");
+module_param(noaccel, bool, 0); +MODULE_PARM_DESC(noaccel, "Disable acceleration"); +#ifdef CONFIG_MTRR
+module_param(nomtrr, bool, 0); +MODULE_PARM_DESC(nomtrr, "Disable MTRR support (0 or 1=disabled) (default=0)");
+#endif

MODULE_AUTHOR("Jim Hague <[email protected]>"); MODULE_DESCRIPTION("Permedia2 framebuffer device driver");

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From: Krzysztof Helt <[email protected]>

This patch adds usage of MTRR registers and two new options: noaccel and nomtrr.

---

@@ -38,6 +38,9 @@
 #include <linux/fb.h>
 #include <linux/init.h>
 #include <linux/pci.h>
+#ifdef CONFIG_MTRR
+#include <asm/mtrr.h>
+#endif
 
 #include <video/permedia2.h>
 #include <video/cvisionppc.h>

@@ -71,8 +74,13 @@ static char *mode __devinitdata = NULL;
  * these flags allow the user to specify that requests for +ve sync
  * should be silently turned in -ve sync.
  */
-static int lowhsync;
-static int lowvsync;
+static int lowhsync __devinitdata;
+static int lowvsync __devinitdata;
+static int noaccel __devinitdata;
+/* mtrr option */
+#ifdef CONFIG_MTRR
+static int nomtrr __devinitdata;
+#endif
 
 /*
  * The hardware state of the graphics card that isn't part of the

@@ -88,6 +96,7 @@ struct pm2fb_par
 	u32		mem_control;	/* MemControl reg at probe */
 	u32		boot_address;	/* BootAddress reg at probe */
 	u32		palette[16];
+	int		mtrr_handle;
 };
 
 /*

@@ -1316,6 +1325,15 @@ static int __devinit pm2fb_probe(struct 
 		goto err_exit_mmio;
 	}
 
+#ifdef CONFIG_MTRR
+	default_par->mtrr_handle = -1;
+	if (!nomtrr)
+		default_par->mtrr_handle =
+			mtrr_add(pm2fb_fix.smem_start,
+				 pm2fb_fix.smem_len,
+				 MTRR_TYPE_WRCOMB, 1);
+#endif
+
 	info->fbops		= &pm2fb_ops;
 	info->fix		= pm2fb_fix;
 	info->pseudo_palette	= default_par->palette;

@@ -1324,6 +1342,11 @@ static int __devinit pm2fb_probe(struct 
 				  FBINFO_HWACCEL_COPYAREA |
 				  FBINFO_HWACCEL_FILLRECT;
 
+	if (noaccel) {
+	    	printk(KERN_DEBUG "disabling acceleration\n");
+  		info->flags |= FBINFO_HWACCEL_DISABLED;
+	}
+
 	if (!mode)
 		mode = "640x480@60";
 

@@ -1375,6 +1398,11 @@ static void __devexit pm2fb_remove(struc
 
 	unregister_framebuffer(info);
 
+#ifdef CONFIG_MTRR
+	if (par->mtrr_handle >= 0)
+		mtrr_del(par->mtrr_handle, info->fix.smem_start,
+			 info->fix.smem_len);
+#endif /* CONFIG_MTRR */
 	iounmap(info->screen_base);
 	release_mem_region(fix->smem_start, fix->smem_len);
 	iounmap(par->v_regs);

@@ -1430,6 +1458,12 @@ static int __init pm2fb_setup(char *opti
 			lowhsync = 1;
 		} else if(!strcmp(this_opt, "lowvsync")) {
 			lowvsync = 1;
+#ifdef CONFIG_MTRR
+		} else if (!strncmp(this_opt, "nomtrr", 6)) {
+			nomtrr = 1;
+#endif
+		} else if (!strncmp(this_opt, "noaccel", 7)) {
+			noaccel = 1;
 		} else {
 			mode = this_opt;
 		}

@@ -1474,6 +1508,12 @@ module_param(lowhsync, bool, 0);
 MODULE_PARM_DESC(lowhsync, "Force horizontal sync low regardless of mode");
 module_param(lowvsync, bool, 0);
 MODULE_PARM_DESC(lowvsync, "Force vertical sync low regardless of mode");
+module_param(noaccel, bool, 0);
+MODULE_PARM_DESC(noaccel, "Disable acceleration");
+#ifdef CONFIG_MTRR
+module_param(nomtrr, bool, 0);
+MODULE_PARM_DESC(nomtrr, "Disable MTRR support (0 or 1=disabled) (default=0)");
+#endif
 
 MODULE_AUTHOR("Jim Hague <[email protected]>");
 MODULE_DESCRIPTION("Permedia2 framebuffer device driver");

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