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>
diff --git a/drivers/video/pm2fb.c b/drivers/video/pm2fb.c
index 10c0cc6..af615d9 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 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 @@
u32 mem_control; /* MemControl reg at probe */
u32 boot_address; /* BootAddress reg at probe */
u32 palette[16];
+ int mtrr_handle;
};
/*
@@ -1316,6 +1325,15 @@
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 @@
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 @@
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 @@
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_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");