savagefb: VGA state save and restore
Allow the saving and restoration of VGA text mode. The state is saved on the
first open and restored on the last close. Because of the VGA registers are
linearly mapped to the MMIO space, MMIO access is used which is not limited to
X86 platforms nor to the primary display device.
An echo 0 > /sys/class/vtconsole/vtcon1/bind will convert the display from
graphics to text mode.
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/savage/savagefb.h b/drivers/video/savage/savagefb.h
index e648a6c..8bfdfc3 100644
--- a/drivers/video/savage/savagefb.h
+++ b/drivers/video/savage/savagefb.h
@@ -15,6 +15,8 @@
#include <linux/i2c.h>
#include <linux/i2c-id.h>
#include <linux/i2c-algo-bit.h>
+#include <linux/mutex.h>
+#include <video/vga.h>
#include "../edid.h"
#ifdef SAVAGEFB_DEBUG
@@ -189,8 +191,12 @@
struct savagefb_i2c_chan chan;
struct savage_reg state;
struct savage_reg save;
+ struct savage_reg initial;
+ struct vgastate vgastate;
+ struct mutex open_lock;
unsigned char *edid;
u32 pseudo_palette[16];
+ u32 open_count;
int paletteEnabled;
int pm_state;
int display_type;
@@ -203,7 +209,7 @@
int clock[4];
int MCLK, REFCLK, LCDclk;
struct {
- u8 __iomem *vbase;
+ void __iomem *vbase;
u32 pbase;
u32 len;
#ifdef CONFIG_MTRR
@@ -212,7 +218,7 @@
} video;
struct {
- volatile u8 __iomem *vbase;
+ void __iomem *vbase;
u32 pbase;
u32 len;
} mmio;
