1 files changed, 71 insertions, 13 deletions

diff --git a/drivers/video/nvidia/nvidia.c b/drivers/video/nvidia/nvidia.c
index 308defc389a2..96d51144094a 100644
--- a/drivers/video/nvidia/nvidia.c
+++ b/drivers/video/nvidia/nvidia.c
@@ -627,41 +627,85 @@ static void nvidia_save_vga(struct nvidia_par *par,
         NVTRACE_LEAVE();
 }
 
+#undef DUMP_REG
+
 static void nvidia_write_regs(struct nvidia_par *par)
 {
         struct _riva_hw_state *state = &par->ModeReg;
         int i;
 
         NVTRACE_ENTER();
-        NVWriteCrtc(par, 0x11, 0x00);
-
-        NVLockUnlock(par, 0);
 
         NVLoadStateExt(par, state);
 
         NVWriteMiscOut(par, state->misc_output);
 
+        for (i = 1; i < NUM_SEQ_REGS; i++) {
+#ifdef DUMP_REG
+                printk(" SEQ[%02x] = %08x\n", i, state->seq[i]);
+#endif
+                NVWriteSeq(par, i, state->seq[i]);
+        }
+
+        /* Ensure CRTC registers 0-7 are unlocked by clearing bit 7 of CRTC[17] */
+        NVWriteCrtc(par, 0x11, state->crtc[0x11] & ~0x80);
+
         for (i = 0; i < NUM_CRT_REGS; i++) {
                 switch (i) {
                 case 0x19:
                 case 0x20 ... 0x40:
                         break;
                 default:
+#ifdef DUMP_REG
+                        printk("CRTC[%02x] = %08x\n", i, state->crtc[i]);
+#endif
                         NVWriteCrtc(par, i, state->crtc[i]);
                 }
         }
 
-        for (i = 0; i < NUM_ATC_REGS; i++)
-                NVWriteAttr(par, i, state->attr[i]);
-
-        for (i = 0; i < NUM_GRC_REGS; i++)
+        for (i = 0; i < NUM_GRC_REGS; i++) {
+#ifdef DUMP_REG
+                printk(" GRA[%02x] = %08x\n", i, state->gra[i]);
+#endif
                 NVWriteGr(par, i, state->gra[i]);
+        }
+
+        for (i = 0; i < NUM_ATC_REGS; i++) {
+#ifdef DUMP_REG
+                printk("ATTR[%02x] = %08x\n", i, state->attr[i]);
+#endif
+                NVWriteAttr(par, i, state->attr[i]);
+        }
 
-        for (i = 0; i < NUM_SEQ_REGS; i++)
-                NVWriteSeq(par, i, state->seq[i]);
         NVTRACE_LEAVE();
 }
 
+static void nvidia_vga_protect(struct nvidia_par *par, int on)
+{
+        unsigned char tmp;
+
+        if (on) {
+                /*
+                 * Turn off screen and disable sequencer.
+                 */
+                tmp = NVReadSeq(par, 0x01);
+
+                NVWriteSeq(par, 0x00, 0x01);            /* Synchronous Reset */
+                NVWriteSeq(par, 0x01, tmp | 0x20);      /* disable the display */
+        } else {
+                /*
+                 * Reenable sequencer, then turn on screen.
+                 */
+
+                tmp = NVReadSeq(par, 0x01);
+
+                NVWriteSeq(par, 0x01, tmp & ~0x20);     /* reenable display */
+                NVWriteSeq(par, 0x00, 0x03);            /* End Reset */
+        }
+}
+
+
+
 static int nvidia_calc_regs(struct fb_info *info)
 {
         struct nvidia_par *par = info->par;
@@ -868,7 +912,7 @@ static void nvidia_init_vga(struct fb_info *info)
         for (i = 0; i < 0x10; i++)
                 state->attr[i] = i;
         state->attr[0x10] = 0x41;
-        state->attr[0x11] = 0x01;
+        state->attr[0x11] = 0xff;
         state->attr[0x12] = 0x0f;
         state->attr[0x13] = 0x00;
         state->attr[0x14] = 0x00;
@@ -991,7 +1035,6 @@ static int nvidiafb_set_par(struct fb_info *info)
 
         nvidia_init_vga(info);
         nvidia_calc_regs(info);
-        nvidia_write_regs(par);
 
         NVLockUnlock(par, 0);
         if (par->twoHeads) {
@@ -1000,7 +1043,22 @@ static int nvidiafb_set_par(struct fb_info *info)
                 NVLockUnlock(par, 0);
         }
 
-        NVWriteCrtc(par, 0x11, 0x00);
+        nvidia_vga_protect(par, 1);
+
+        nvidia_write_regs(par);
+
+#if defined (__BIG_ENDIAN)
+        /* turn on LFB swapping */
+        {
+                unsigned char tmp;
+
+                VGA_WR08(par->PCIO, 0x3d4, 0x46);
+                tmp = VGA_RD08(par->PCIO, 0x3d5);
+                tmp |= (1 << 7);
+                VGA_WR08(par->PCIO, 0x3d5, tmp);
+    }
+#endif
+
         info->fix.line_length = (info->var.xres_virtual *
                                  info->var.bits_per_pixel) >> 3;
         if (info->var.accel_flags) {
@@ -1022,7 +1080,7 @@ static int nvidiafb_set_par(struct fb_info *info)
 
         par->cursor_reset = 1;
 
-        NVWriteCrtc(par, 0x11, 0xff);
+        nvidia_vga_protect(par, 0);
 
         NVTRACE_LEAVE();
         return 0;