aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/video/console/vgacon.c
diff options
context:
space:
mode:
authorJeff Garzik <jeff@garzik.org>2006-02-27 11:33:51 -0500
committerJeff Garzik <jeff@garzik.org>2006-02-27 11:33:51 -0500
commitdbfedbb98145375106cee7ec7269611d553819dc (patch)
tree81d2a6de51b1bb3c704e5385dbc90ca79efa69bc /drivers/video/console/vgacon.c
parent7b0386921db20add25afd8678ed34a9253e512fc (diff)
parente95a9ec1bb66e07b138861c743192f06e7b3e4de (diff)
Merge branch 'master'
Diffstat (limited to 'drivers/video/console/vgacon.c')
-rw-r--r--drivers/video/console/vgacon.c67
1 files changed, 35 insertions, 32 deletions
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
index 12d9329d1408..5a86978537d2 100644
--- a/drivers/video/console/vgacon.c
+++ b/drivers/video/console/vgacon.c
@@ -509,57 +509,60 @@ static int vgacon_doresize(struct vc_data *c,
509{ 509{
510 unsigned long flags; 510 unsigned long flags;
511 unsigned int scanlines = height * c->vc_font.height; 511 unsigned int scanlines = height * c->vc_font.height;
512 u8 scanlines_lo, r7, vsync_end, mode, max_scan; 512 u8 scanlines_lo = 0, r7 = 0, vsync_end = 0, mode, max_scan;
513 513
514 spin_lock_irqsave(&vga_lock, flags); 514 spin_lock_irqsave(&vga_lock, flags);
515 515
516 outb_p(VGA_CRTC_MAX_SCAN, vga_video_port_reg);
517 max_scan = inb_p(vga_video_port_val);
518
519 if (max_scan & 0x80)
520 scanlines <<= 1;
521
522 vgacon_xres = width * VGA_FONTWIDTH; 516 vgacon_xres = width * VGA_FONTWIDTH;
523 vgacon_yres = height * c->vc_font.height; 517 vgacon_yres = height * c->vc_font.height;
524 outb_p(VGA_CRTC_MODE, vga_video_port_reg); 518 if (vga_video_type >= VIDEO_TYPE_VGAC) {
525 mode = inb_p(vga_video_port_val); 519 outb_p(VGA_CRTC_MAX_SCAN, vga_video_port_reg);
520 max_scan = inb_p(vga_video_port_val);
526 521
527 if (mode & 0x04) 522 if (max_scan & 0x80)
528 scanlines >>= 1; 523 scanlines <<= 1;
529 524
530 scanlines -= 1; 525 outb_p(VGA_CRTC_MODE, vga_video_port_reg);
531 scanlines_lo = scanlines & 0xff; 526 mode = inb_p(vga_video_port_val);
532 527
533 outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg); 528 if (mode & 0x04)
534 r7 = inb_p(vga_video_port_val) & ~0x42; 529 scanlines >>= 1;
535 530
536 if (scanlines & 0x100) 531 scanlines -= 1;
537 r7 |= 0x02; 532 scanlines_lo = scanlines & 0xff;
538 if (scanlines & 0x200)
539 r7 |= 0x40;
540 533
541 /* deprotect registers */ 534 outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg);
542 outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); 535 r7 = inb_p(vga_video_port_val) & ~0x42;
543 vsync_end = inb_p(vga_video_port_val); 536
544 outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); 537 if (scanlines & 0x100)
545 outb_p(vsync_end & ~0x80, vga_video_port_val); 538 r7 |= 0x02;
539 if (scanlines & 0x200)
540 r7 |= 0x40;
541
542 /* deprotect registers */
543 outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg);
544 vsync_end = inb_p(vga_video_port_val);
545 outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg);
546 outb_p(vsync_end & ~0x80, vga_video_port_val);
547 }
546 548
547 outb_p(VGA_CRTC_H_DISP, vga_video_port_reg); 549 outb_p(VGA_CRTC_H_DISP, vga_video_port_reg);
548 outb_p(width - 1, vga_video_port_val); 550 outb_p(width - 1, vga_video_port_val);
549 outb_p(VGA_CRTC_OFFSET, vga_video_port_reg); 551 outb_p(VGA_CRTC_OFFSET, vga_video_port_reg);
550 outb_p(width >> 1, vga_video_port_val); 552 outb_p(width >> 1, vga_video_port_val);
551 553
552 outb_p(VGA_CRTC_V_DISP_END, vga_video_port_reg); 554 if (vga_video_type >= VIDEO_TYPE_VGAC) {
553 outb_p(scanlines_lo, vga_video_port_val); 555 outb_p(VGA_CRTC_V_DISP_END, vga_video_port_reg);
554 outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg); 556 outb_p(scanlines_lo, vga_video_port_val);
555 outb_p(r7,vga_video_port_val); 557 outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg);
558 outb_p(r7,vga_video_port_val);
556 559
557 /* reprotect registers */ 560 /* reprotect registers */
558 outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); 561 outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg);
559 outb_p(vsync_end, vga_video_port_val); 562 outb_p(vsync_end, vga_video_port_val);
563 }
560 564
561 spin_unlock_irqrestore(&vga_lock, flags); 565 spin_unlock_irqrestore(&vga_lock, flags);
562
563 return 0; 566 return 0;
564} 567}
565 568