From: Antonino Daplas <adaplas@pol.net>
To: Linux Fbdev development list <linux-fbdev-devel@lists.sourceforge.net>
Subject: [PATCH]: vesafb - vram option
Date: 28 Mar 2003 04:20:12 +0800 [thread overview]
Message-ID: <1048796361.977.6.camel@localhost.localdomain> (raw)
Attached is a diff against linux-2.5.66.
- Added vesafb option to specify amount of video RAM to remap. This is
perhaps useful for people with machines with large amounts of system and
graphics RAM and vesafb fails to load due to failure to ioremap.
To use: to remap only 1MiB of ram, add the ff. in your boot option:
video=vesafb:vram:1,<your other options>
Tony
diff -Naur linux-2.5.66-orig/Documentation/fb/vesafb.txt linux-2.5.66/Documentation/fb/vesafb.txt
--- linux-2.5.66-orig/Documentation/fb/vesafb.txt 2003-03-26 02:24:54.000000000 +0000
+++ linux-2.5.66/Documentation/fb/vesafb.txt 2003-03-27 20:10:01.000000000 +0000
@@ -146,7 +146,9 @@
mtrr setup memory type range registers for the vesafb framebuffer.
-
+vram:n remap 'n' MiB of video RAM. If 0 or not specified, remap all
+ available video RAM.
+
Have fun!
Gerd
diff -Naur linux-2.5.66-orig/drivers/video/vesafb.c linux-2.5.66/drivers/video/vesafb.c
--- linux-2.5.66-orig/drivers/video/vesafb.c 2003-02-16 00:49:23.000000000 +0000
+++ linux-2.5.66/drivers/video/vesafb.c 2003-03-27 20:01:11.000000000 +0000
@@ -50,7 +50,7 @@
static int inverse = 0;
static int mtrr = 0;
-
+static int vram __initdata = 0;
static int pmi_setpal = 0; /* pmi for palette changes ??? */
static int ypan = 0; /* 0..nothing, 1..ypan, 2..ywrap */
static unsigned short *pmi_base = 0;
@@ -206,6 +206,8 @@
pmi_setpal=1;
else if (! strcmp(this_opt, "mtrr"))
mtrr=1;
+ else if (! strncmp(this_opt, "vram:", 5))
+ vram = simple_strtoul(this_opt+5, NULL, 0);
}
return 0;
}
@@ -226,6 +228,8 @@
vesafb_defined.yres = screen_info.lfb_height;
vesafb_fix.line_length = screen_info.lfb_linelength;
vesafb_fix.smem_len = screen_info.lfb_size * 65536;
+ if (vram && vram * 1024 * 1024 < vesafb_fix.smem_len)
+ vesafb_fix.smem_len = vram * 1024 * 1024;
vesafb_fix.visual = (vesafb_defined.bits_per_pixel == 8) ?
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
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reply other threads:[~2003-03-27 20:38 UTC|newest]
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