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radeonfb: Add quirk for the graphics adapter in some JSxx 

These devices are set to 640x480 by firmware, switch them to 800x600@60
so that the graphical installer can run on remote console.

Reported by IBM during SLES10 SP2 beta testing:

https://bugzilla.novell.com/show_bug.cgi?id=461002
LTC50817

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
hifive-unleashed-5.1
Tony Breeds 2012-07-18 06:49:04 +00:00 committed by Benjamin Herrenschmidt
parent 0e3849836b
commit e5ae3cdfd5
1 changed files with 35 additions and 0 deletions
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35
drivers/video/aty/radeon_monitor.c
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@ -730,6 +730,25 @@ static void radeon_videomode_to_var(struct fb_var_screeninfo *var,
var->vmode = mode->vmode;
}
#ifdef CONFIG_PPC_PSERIES
static int is_powerblade(const char *model)
{
struct device_node *root;
const char* cp;
int len, l, rc = 0;
root = of_find_node_by_path("/");
if (root && model) {
l = strlen(model);
cp = of_get_property(root, "model", &len);
if (cp)
rc = memcmp(model, cp, min(len, l)) == 0;
of_node_put(root);
}
return rc;
}
#endif
/*
* Build the modedb for head 1 (head 2 will come later), check panel infos
* from either BIOS or EDID, and pick up the default mode
@ -865,6 +884,22 @@ void __devinit radeon_check_modes(struct radeonfb_info *rinfo, const char *mode_
has_default_mode = 1;
}
#ifdef CONFIG_PPC_PSERIES
if (!has_default_mode && (
is_powerblade("IBM,8842") || /* JS20 */
is_powerblade("IBM,8844") || /* JS21 */
is_powerblade("IBM,7998") || /* JS12/JS21/JS22 */
is_powerblade("IBM,0792") || /* QS21 */
is_powerblade("IBM,0793") /* QS22 */
)) {
printk("Falling back to 800x600 on JSxx hardware\n");
if (fb_find_mode(&info->var, info, "800x600@60",
info->monspecs.modedb,
info->monspecs.modedb_len, NULL, 8) != 0)
has_default_mode = 1;
}
#endif
/*
* Still no mode, let's pick up a default from the db
*/