patch-2.4.21 linux-2.4.21/drivers/video/clgenfb.c

• Lines: 84
• Date: 2003-06-13 07:51:37.000000000 -0700
• Orig file: linux-2.4.20/drivers/video/clgenfb.c
• Orig date: 2002-11-28 15:53:15.000000000 -0800

diff -urN linux-2.4.20/drivers/video/clgenfb.c linux-2.4.21/drivers/video/clgenfb.c
@@ -1,7 +1,7 @@
 /*
  * drivers/video/clgenfb.c - driver for Cirrus Logic chipsets
  *
- * Copyright 1999-2001 Jeff Garzik <jgarzik@mandrakesoft.com>
+ * Copyright 1999-2001 Jeff Garzik <jgarzik@pobox.com>
  *
  * Contributors (thanks, all!)
  *
@@ -15,6 +15,9 @@
  *	Lars Hecking:
  *	Amiga updates and testing.
  *
+ *	Cliff Matthews <ctm@ardi.com>:
+ *	16bpp fix for CL-GD7548 (uses info from XFree86 4.2.0 source)
+ *
  * Original clgenfb author:  Frank Neumann
  *
  * Based on retz3fb.c and clgen.c:
@@ -403,6 +406,9 @@
 
 #ifdef CONFIG_PCI
 	struct pci_dev *pdev;
+#define IS_7548(x) ((x)->pdev->device == PCI_DEVICE_ID_CIRRUS_7548)
+#else
+#define IS_7548(x) (FALSE)
 #endif
 };
 
@@ -970,7 +976,10 @@
 
 	DPRINTK ("desired pixclock: %ld kHz\n", freq);
 
-	maxclock = clgen_board_info[fb_info->btype].maxclock;
+	if (IS_7548(fb_info))
+		maxclock = 80100;
+	else
+		maxclock = clgen_board_info[fb_info->btype].maxclock;
 	_par->multiplexing = 0;
 
 	/* If the frequency is greater than we can support, we might be able
@@ -1478,10 +1487,17 @@
 
 		case BT_ALPINE:
 			DPRINTK (" (for GD543x)\n");
-			if (_par->HorizRes >= 1024)
-				vga_wseq (fb_info->regs, CL_SEQR7, 0xa7);
-			else
-				vga_wseq (fb_info->regs, CL_SEQR7, 0xa3);
+			if (IS_7548(fb_info)) {
+				vga_wseq (fb_info->regs, CL_SEQR7, 
+					  (vga_rseq (fb_info->regs, CL_SEQR7) & 0xE0)
+					  | 0x17);
+				WHDR (fb_info, 0xC1);
+			} else {
+				if (_par->HorizRes >= 1024)
+					vga_wseq (fb_info->regs, CL_SEQR7, 0xa7);
+				else
+					vga_wseq (fb_info->regs, CL_SEQR7, 0xa3);
+			}	
 			clgen_set_mclk (fb_info, _par->mclk, _par->divMCLK);
 			break;
 
@@ -1594,6 +1610,11 @@
 			_par->var.bits_per_pixel);
 	}
 
+	if (IS_7548(fb_info)) {
+		vga_wseq (fb_info->regs, CL_SEQR2D, 
+			vga_rseq (fb_info->regs, CL_SEQR2D) | 0xC0);
+	}
+
 	vga_wcrt (fb_info->regs, VGA_CRTC_OFFSET, offset & 0xff);
 	tmp = 0x22;
 	if (offset & 0x100)
@@ -2884,7 +2905,7 @@
      *  Modularization
      */
 
-MODULE_AUTHOR("Copyright 1999,2000 Jeff Garzik <jgarzik@mandrakesoft.com>");
+MODULE_AUTHOR("Copyright 1999,2000 Jeff Garzik <jgarzik@pobox.com>");
 MODULE_DESCRIPTION("Accelerated FBDev driver for Cirrus Logic chips");
 MODULE_LICENSE("GPL");