The patch titled
nvidiafb: VGA state save and restore
has been removed from the -mm tree. Its filename was
nvidiafb-vga-state-save-and-restore.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: nvidiafb: 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 non-linear mapping
of the VGA registers to the MMIO space, this will be done only on X86
platforms where the device is the primary display.
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/nvidia/nv_type.h | 6 ++
drivers/video/nvidia/nvidia.c | 74 ++++++++++++++++++++++++++++++-
3 files changed, 80 insertions(+), 2 deletions(-)
diff -puN drivers/video/Makefile~nvidiafb-vga-state-save-and-restore drivers/video/Makefile
--- a/drivers/video/Makefile~nvidiafb-vga-state-save-and-restore
+++ a/drivers/video/Makefile
@@ -32,7 +32,7 @@ obj-$(CONFIG_FB_PM3) += pm3fb.o
obj-$(CONFIG_FB_MATROX) += matrox/
obj-$(CONFIG_FB_RIVA) += riva/ vgastate.o
-obj-$(CONFIG_FB_NVIDIA) += nvidia/
+obj-$(CONFIG_FB_NVIDIA) += nvidia/ vgastate.o
obj-$(CONFIG_FB_ATY) += aty/ macmodes.o
obj-$(CONFIG_FB_ATY128) += aty/ macmodes.o
obj-$(CONFIG_FB_RADEON) += aty/
diff -puN drivers/video/nvidia/nv_type.h~nvidiafb-vga-state-save-and-restore drivers/video/nvidia/nv_type.h
--- a/drivers/video/nvidia/nv_type.h~nvidiafb-vga-state-save-and-restore
+++ a/drivers/video/nvidia/nv_type.h
@@ -5,6 +5,8 @@
#include <linux/types.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
+#include <linux/mutex.h>
+#include <video/vga.h>
#define NV_ARCH_04 0x04
#define NV_ARCH_10 0x10
@@ -93,7 +95,10 @@ struct riva_regs {
struct nvidia_par {
RIVA_HW_STATE SavedReg;
RIVA_HW_STATE ModeReg;
+ RIVA_HW_STATE initial_state;
RIVA_HW_STATE *CurrentState;
+ struct vgastate vgastate;
+ struct mutex open_lock;
u32 pseudo_palette[16];
struct pci_dev *pci_dev;
u32 Architecture;
@@ -141,6 +146,7 @@ struct nvidia_par {
int BlendingPossible;
u32 paletteEnabled;
u32 forceCRTC;
+ u32 open_count;
u8 DDCBase;
#ifdef CONFIG_MTRR
struct {
diff -puN drivers/video/nvidia/nvidia.c~nvidiafb-vga-state-save-and-restore drivers/video/nvidia/nvidia.c
--- a/drivers/video/nvidia/nvidia.c~nvidiafb-vga-state-save-and-restore
+++ a/drivers/video/nvidia/nvidia.c
@@ -949,8 +949,80 @@ static int nvidiafb_blank(int blank, str
return 0;
}
+/*
+ * Because the VGA registers are not mapped linearly in its MMIO space,
+ * restrict VGA register saving and restore to x86 only, where legacy VGA IO
+ * access is legal. Consequently, we must also check if the device is the
+ * primary display.
+ */
+#ifdef CONFIG_X86
+static void save_vga_x86(struct nvidia_par *par)
+{
+ struct resource *res= &par->pci_dev->resource[PCI_ROM_RESOURCE];
+
+ if (res && res->flags & IORESOURCE_ROM_SHADOW) {
+ memset(&par->vgastate, 0, sizeof(par->vgastate));
+ par->vgastate.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS |
+ VGA_SAVE_CMAP;
+ save_vga(&par->vgastate);
+ }
+}
+
+static void restore_vga_x86(struct nvidia_par *par)
+{
+ struct resource *res= &par->pci_dev->resource[PCI_ROM_RESOURCE];
+
+ if (res && res->flags & IORESOURCE_ROM_SHADOW)
+ restore_vga(&par->vgastate);
+}
+#else
+#define save_vga_x86(x) do {} while (0)
+#define restore_vga_x86(x) do {} while (0)
+#endif /* X86 */
+
+static int nvidiafb_open(struct fb_info *info, int user)
+{
+ struct nvidia_par *par = info->par;
+
+ mutex_lock(&par->open_lock);
+
+ if (!par->open_count) {
+ save_vga_x86(par);
+ nvidia_save_vga(par, &par->initial_state);
+ }
+
+ par->open_count++;
+ mutex_unlock(&par->open_lock);
+ return 0;
+}
+
+static int nvidiafb_release(struct fb_info *info, int user)
+{
+ struct nvidia_par *par = info->par;
+ int err = 0;
+
+ mutex_lock(&par->open_lock);
+
+ if (!par->open_count) {
+ err = -EINVAL;
+ goto done;
+ }
+
+ if (par->open_count == 1) {
+ nvidia_write_regs(par, &par->initial_state);
+ restore_vga_x86(par);
+ }
+
+ par->open_count--;
+done:
+ mutex_unlock(&par->open_lock);
+ return 0;
+}
+
static struct fb_ops nvidia_fb_ops = {
.owner = THIS_MODULE,
+ .fb_open = nvidiafb_open,
+ .fb_release = nvidiafb_release,
.fb_check_var = nvidiafb_check_var,
.fb_set_par = nvidiafb_set_par,
.fb_setcolreg = nvidiafb_setcolreg,
@@ -1208,7 +1280,7 @@ static int __devinit nvidiafb_probe(stru
par = info->par;
par->pci_dev = pd;
-
+ mutex_init(&par->open_lock);
info->pixmap.addr = kzalloc(8 * 1024, GFP_KERNEL);
if (info->pixmap.addr == NULL)
_
Patches currently in -mm which might be from adaplas@xxxxxxxxx are
origin.patch
vt8623fb-new-framebuffer-driver-for-via-vt8623.patch
vt8623fb-fix-compile-warnings.patch
vt8623fb-fix-compile-error-if-config_mtrr=n.patch
arkfb-new-framebuffer-driver-for-ark-logic-cards.patch
arkfb-fix-compiler-warnings.patch
arkfb-fix-compile-error-if-config_mtrr=n.patch
arkfb-new-framebuffer-driver-for-ark-logic-cards-fix.patch
svgalib-move-fb_get_caps-to-svgalib.patch
-
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