ps3fb: default to 480p on DVI-D/HDMI if video=safe

Default to the 480p video mode on DVI-D and HDMI displays if `video=safe' is
passed on the kernel command line.

This is intended to be used by `kboot'-style boot loaders (i.e. first-stage
kernels) for the PS3, to provide a failsafe video mode.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/ps3/ps3av.c

@@ -23,6 +23,7 @@
 #include <linux/delay.h>
 #include <linux/notifier.h>
 #include <linux/ioctl.h>
+#include <linux/fb.h>
 
 #include <asm/firmware.h>
 #include <asm/ps3av.h>
@@ -33,6 +34,8 @@
 #define BUFSIZE          4096	/* vuart buf size */
 #define PS3AV_BUF_SIZE   512	/* max packet size */
 
+static int safe_mode;
+
 static int timeout = 5000;	/* in msec ( 5 sec ) */
 module_param(timeout, int, 0644);
 
@@ -639,6 +642,9 @@ static int ps3av_hdmi_get_id(struct ps3av_info_monitor *info)
 {
 	int id;
 
+	if (safe_mode)
+		return PS3AV_DEFAULT_HDMI_MODE_ID_REG_60;
+
 	/* check native resolution */
 	id = ps3av_resbit2id(info->res_50.native, info->res_60.native,
 			     info->res_vesa.native);
@@ -1021,7 +1027,14 @@ static int ps3av_probe(struct ps3_system_bus_device *dev)
 		       res);
 
 	ps3av_get_hw_conf(ps3av);
+
+#ifdef CONFIG_FB
+	if (fb_mode_option && !strcmp(fb_mode_option, "safe"))
+		safe_mode = 1;
+#endif /* CONFIG_FB */
 	id = ps3av_auto_videomode(&ps3av->av_hw_conf);
+	safe_mode = 0;
+
 	mutex_lock(&ps3av->mutex);
 	ps3av->ps3av_mode = id;
 	mutex_unlock(&ps3av->mutex);