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vfb: Support vfb configuration from kernel cmdline

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Add support to configure mode_option, framebuffer size and bpp
from kernel command line.

Signed-off-by: Shashank Mittal <mittals@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
This commit is contained in:
Shashank Mittal 2011-05-12 19:56:48 -07:00 committed by Stephen Boyd
parent cc61930243
commit 77ac7552be
1 changed files with 17 additions and 2 deletions
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19
drivers/video/vfb.c
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@ -35,6 +35,13 @@
static void *videomemory;
static u_long videomemorysize = VIDEOMEMSIZE;
module_param(videomemorysize, ulong, 0);
static char *mode_option __devinitdata;
static int bpp __devinitdata = 8;
module_param(mode_option, charp, 0);
MODULE_PARM_DESC(mode_option, "Initial video mode e.g. '648x480-8@60'");
module_param(bpp, int, 0);
/**********************************************************************
*
@ -469,6 +476,14 @@ static int __init vfb_setup(char *options)
/* Test disable for backwards compatibility */
if (!strcmp(this_opt, "disable"))
vfb_enable = 0;
else if (!strncmp(this_opt, "bpp=", 4)) {
if (kstrtoint(this_opt + 4, 0, &bpp) < 0)
bpp = 8;
} else if (!strncmp(this_opt, "memsize=", 8)) {
if (kstrtoul(this_opt + 8, 0, &videomemorysize) < 0)
videomemorysize = VIDEOMEMSIZE;
} else
mode_option = this_opt;
}
return 1;
}
@ -504,8 +519,8 @@ static int __devinit vfb_probe(struct platform_device *dev)
info->screen_base = (char __iomem *)videomemory;
info->fbops = &vfb_ops;
retval = fb_find_mode(&info->var, info, NULL,
NULL, 0, NULL, 8);
retval = fb_find_mode(&info->var, info, mode_option,
NULL, 0, NULL, bpp);
if (!retval || (retval == 4))
info->var = vfb_default;