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authorThomas Bogendoerfer <tsbogend@alpha.franken.de>2007-05-17 14:53:12 +0200
committerRalf Baechle <ralf@linux-mips.org>2007-06-06 19:34:31 +0100
commit22df5bc591ea2d0dbe8240fe8af0816b8a6533b9 (patch)
treee933d8fb44a0ab21f7775db121e647f0dbf9a60b /arch
parent0c2bf745f9bdef7243ef5f04e6b05f592abead06 (diff)
[MIPS] Fix VGA corruption on RM300C
... by setting DRAM config to 2MB (SNI always used that size). This also fixes video dram size detection in cirrusfb. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/sni/setup.c33
1 files changed, 32 insertions, 1 deletions
diff --git a/arch/mips/sni/setup.c b/arch/mips/sni/setup.c
index 68d7cf609b4..4fedfbda0c7 100644
--- a/arch/mips/sni/setup.c
+++ b/arch/mips/sni/setup.c
@@ -6,7 +6,7 @@
* for more details.
*
* Copyright (C) 1996, 97, 98, 2000, 03, 04, 06 Ralf Baechle (ralf@linux-mips.org)
- * Copyright (C) 2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
+ * Copyright (C) 2006,2007 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
*/
#include <linux/eisa.h>
#include <linux/init.h>
@@ -92,3 +92,34 @@ void __init plat_mem_setup(void)
sni_display_setup();
}
+
+#if CONFIG_PCI
+
+#include <linux/pci.h>
+#include <video/vga.h>
+#include <video/cirrus.h>
+
+static void __devinit quirk_cirrus_ram_size(struct pci_dev *dev)
+{
+ u16 cmd;
+
+ /*
+ * firmware doesn't set the ram size correct, so we
+ * need to do it here, otherwise we get screen corruption
+ * on older Cirrus chips
+ */
+ pci_read_config_word (dev, PCI_COMMAND, &cmd);
+ if ((cmd & (PCI_COMMAND_IO|PCI_COMMAND_MEMORY))
+ == (PCI_COMMAND_IO|PCI_COMMAND_MEMORY)) {
+ vga_wseq (NULL, CL_SEQR6, 0x12); /* unlock all extension registers */
+ vga_wseq (NULL, CL_SEQRF, 0x18);
+ }
+}
+
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5434_8,
+ quirk_cirrus_ram_size);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5436,
+ quirk_cirrus_ram_size);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446,
+ quirk_cirrus_ram_size);
+#endif