The patch titled
savagefb: VGA state save and restore
has been added to the -mm tree. Its filename is
savagefb-vga-state-save-and-restore.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: savagefb: VGA state save and restore
From: "Antonino A. Daplas" <adaplas@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/video/Makefile | 2 -
drivers/video/savage/savagefb.h | 10 ++++-
drivers/video/savage/savagefb_driver.c | 39 +++++++++++++++++++++++
3 files changed, 48 insertions(+), 3 deletions(-)
diff -puN drivers/video/Makefile~savagefb-vga-state-save-and-restore drivers/video/Makefile
--- a/drivers/video/Makefile~savagefb-vga-state-save-and-restore
+++ a/drivers/video/Makefile
@@ -38,7 +38,7 @@ obj-$(CONFIG_FB_ATY128) += aty/ macmo
obj-$(CONFIG_FB_RADEON) += aty/
obj-$(CONFIG_FB_SIS) += sis/
obj-$(CONFIG_FB_KYRO) += kyro/
-obj-$(CONFIG_FB_SAVAGE) += savage/
+obj-$(CONFIG_FB_SAVAGE) += savage/ vgastate.o
obj-$(CONFIG_FB_GEODE) += geode/
obj-$(CONFIG_FB_MBX) += mbx/
obj-$(CONFIG_FB_I810) += vgastate.o
diff -puN drivers/video/savage/savagefb.h~savagefb-vga-state-save-and-restore drivers/video/savage/savagefb.h
--- a/drivers/video/savage/savagefb.h~savagefb-vga-state-save-and-restore
+++ a/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_par {
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 @@ struct savagefb_par {
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 @@ struct savagefb_par {
} video;
struct {
- volatile u8 __iomem *vbase;
+ void __iomem *vbase;
u32 pbase;
u32 len;
} mmio;
diff -puN drivers/video/savage/savagefb_driver.c~savagefb-vga-state-save-and-restore drivers/video/savage/savagefb_driver.c
--- a/drivers/video/savage/savagefb_driver.c~savagefb-vga-state-save-and-restore
+++ a/drivers/video/savage/savagefb_driver.c
@@ -1623,8 +1623,46 @@ static void savagefb_restore_state(struc
savagefb_blank(FB_BLANK_UNBLANK, info);
}
+static int savagefb_open(struct fb_info *info, int user)
+{
+ struct savagefb_par *par = info->par;
+
+ mutex_lock(&par->open_lock);
+
+ if (!par->open_count) {
+ memset(&par->vgastate, 0, sizeof(par->vgastate));
+ par->vgastate.flags = VGA_SAVE_CMAP | VGA_SAVE_FONTS |
+ VGA_SAVE_MODE;
+ par->vgastate.vgabase = par->mmio.vbase + 0x8000;
+ save_vga(&par->vgastate);
+ savage_get_default_par(par, &par->initial);
+ }
+
+ par->open_count++;
+ mutex_unlock(&par->open_lock);
+ return 0;
+}
+
+static int savagefb_release(struct fb_info *info, int user)
+{
+ struct savagefb_par *par = info->par;
+
+ mutex_lock(&par->open_lock);
+
+ if (par->open_count == 1) {
+ savage_set_default_par(par, &par->initial);
+ restore_vga(&par->vgastate);
+ }
+
+ par->open_count--;
+ mutex_unlock(&par->open_lock);
+ return 0;
+}
+
static struct fb_ops savagefb_ops = {
.owner = THIS_MODULE,
+ .fb_open = savagefb_open,
+ .fb_release = savagefb_release,
.fb_check_var = savagefb_check_var,
.fb_set_par = savagefb_set_par,
.fb_setcolreg = savagefb_setcolreg,
@@ -2173,6 +2211,7 @@ static int __devinit savagefb_probe(stru
if (!info)
return -ENOMEM;
par = info->par;
+ mutex_init(&par->open_lock);
err = pci_enable_device(dev);
if (err)
goto failed_enable;
_
Patches currently in -mm which might be from adaplas@xxxxxxxxx are
origin.patch
fbdev-add-ultrasharp-uxga-to-broken-monitor-database.patch
intelfb-fix-ring-space-calculation.patch
nvidiafb-bring-back-generic-ddc-reading.patch
fbdev-ignore-vesa-modes-if-framebuffer-is-disabled.patch
fbdev-fix-obvious-bug-in-show_pan.patch
neofb-fill-transp-msb_right-with-the-correct.patch
atyfb-kill-dead-code.patch
fbdev-mm-deferred-io-support.patch
fbdev-mm-deferred-io-support-fix.patch
fbdev-mm-deferred-io-support-fix-2.patch
fbdev-hecuba-framebuffer-driver.patch
fbdev-hecuba-framebuffer-driver-fix.patch
nvidiafb-fix-reversed-ddc-port.patch
vt-expose-system-wide-utf-8-default-setting-via-sysfs.patch
fbdev-dont-show-logo-if-driver-or-fbcon-are-modular.patch
rivafb-nvidiafb-enable-hardware-monitoring.patch
rivafb-handle-i2c-bus-creation-failure.patch
rivafb-nvidiafb-various-cleanups.patch
rivafb-fixed-reversed-ddc-ports.patch
nvidiafb-ensure-that-crtc-registers-are-accessible.patch
nvidiafb-access-crt-registers-safely.patch
skeletonfb-various-corrections.patch
epson1355fbc-fix-error-handling-code.patch
nvidiafb-vga-state-save-and-restore.patch
savagefb-rework-i2c-bit-access.patch
savagefb-vga-state-save-and-restore.patch
fbdev-link-vgastateo-using-kconfig.patch
fbcon-delay-screen-update-when-setting-the-mode-of.patch
nvidiafb-fix-sparse-warning.patch
rivafb-fix-io-access.patch
fbdev-kill-sparse-warning-in-deferred-io.patch
fbdev-add-sparse-annotations-in-svgalibc.patch
arcfb-kill-sparse-warning.patch
s3fb-add-sparse-annotations.patch
hecubafb-kill-sparse-warnings.patch
i810fb-fix-incorrect-frequency-mask.patch
vt-add-documentation-for-new-boot-sysfs-options.patch
skeletonfb-documentation-error-fixes.patch
fbdev-add-drawing-functions-for-framebuffers-in-system.patch
arcfb-use-sys-instead-of-cfb-drawing-functions.patch
hecubafb-use-sys-instead-of-cfb-drawing-functions.patch
vfb-use-sys-instead-of-cfb-drawing-functions.patch
fbdev-pass-struct-fb_info-to-fb_read-and-fb_write.patch
fbdev-add-fb_read-fb_write-functions-for-framebuffers.patch
arcfb-us-fb_sys_read.patch
hecubafb-us-fb_sys_read.patch
vfb-us-fb_sys_read-and-fb_sys_write.patch
fbdev-consolidate-common-drawing-functions-into-a.patch
fbdev-advertise-limitation-of-drawing-engine.patch
fbcon-font-setting-should-check-limitation-of-driver.patch
vga16fb-restrict-to-blit-rectangles-with-widths-of.patch
s3fb-limit-8x16-rectangles-when-tileblitting-is-enabled.patch
fbdev-add-tile-operation-to-get-the-maximum-length.patch
s3fb-implement-fb_get_tilemax.patch
fbcon-check-if-the-character-count-can-be-handled.patch
fbdev-save-the-activate-field-before-calling-fb_check_var.patch
s3fb-driver-fixes.patch
vmlfb-framebuffer-driver-for-intel-vermilion-range.patch
nvidiafb-rivafb-switch-to-pci_get-refcounting.patch
pm2fb-3dlabs-permedia-2v-reference-board-added.patch
pm2fb-permedia-2v-memory-clock-setting.patch
pm2fb-pixclock-setting-restriction.patch
nvidiafb-prevent-triggering-of-softlockup.patch
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