pm3fb: mtrr support and noaccel option

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

[bunk@kernel.org: make pm3fb_init() static again]
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 40 insertions, 0 deletions

diff --git a/drivers/video/pm2fb.c b/drivers/video/pm2fb.c
index 10c0cc6e93fc..af615d99d438 100644
--- a/drivers/video/pm2fb.c
+++ b/drivers/video/pm2fb.c
@@ -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>
@@ -73,6 +76,11 @@ static char *mode __devinitdata = NULL;
  */
 static int lowhsync;
 static int lowvsync;
+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 pci_dev *pdev,
                 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 pci_dev *pdev,
                                   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(struct pci_dev *pdev)
 
         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 *options)
                         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 <jim.hague@acm.org>");
 MODULE_DESCRIPTION("Permedia2 framebuffer device driver");