ChangeSet 1.2290, 2005/03/31 08:45:24-08:00, [EMAIL PROTECTED]
[PATCH] atyfb: Add boot/module option to override composite sync
Some SPARC-based displays need the composite sync set to high. Since
none
of the entries in the default db has the composite sync set to high,
using
fb_find_mode() will produce a blank display.
Signed-off-by: Antonino Daplas <[EMAIL PROTECTED]>
Acked-by: Alexander Kern <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
atyfb_base.c | 13 +++++++++++++
1 files changed, 13 insertions(+)
diff -Nru a/drivers/video/aty/atyfb_base.c b/drivers/video/aty/atyfb_base.c
--- a/drivers/video/aty/atyfb_base.c 2005-03-31 10:25:10 -08:00
+++ b/drivers/video/aty/atyfb_base.c 2005-03-31 10:25:10 -08:00
@@ -307,6 +307,7 @@
static int pll;
static int mclk;
static int xclk;
+static int comp_sync __initdata = -1;
static char *mode;
#ifdef CONFIG_PPC
@@ -2527,6 +2528,13 @@
else
var.accel_flags |= FB_ACCELF_TEXT;
+ if (comp_sync != -1) {
+ if (!comp_sync)
+ var.sync &= ~FB_SYNC_COMP_HIGH_ACT;
+ else
+ var.sync |= FB_SYNC_COMP_HIGH_ACT;
+ }
+
if (var.yres == var.yres_virtual) {
u32 videoram = (info->fix.smem_len - (PAGE_SIZE << 2));
var.yres_virtual = ((videoram * 8) / var.bits_per_pixel) /
var.xres_virtual;
@@ -3612,6 +3620,8 @@
mclk = simple_strtoul(this_opt + 5, NULL, 0);
else if (!strncmp(this_opt, "xclk:", 5))
xclk = simple_strtoul(this_opt+5, NULL, 0);
+ else if (!strncmp(this_opt, "comp_sync:", 10))
+ comp_sync = simple_strtoul(this_opt+10, NULL, 0);
#ifdef CONFIG_PPC
else if (!strncmp(this_opt, "vmode:", 6)) {
unsigned int vmode =
@@ -3701,6 +3711,9 @@
MODULE_PARM_DESC(mclk, "int: override memory clock");
module_param(xclk, int, 0);
MODULE_PARM_DESC(xclk, "int: override accelerated engine clock");
+module_param(comp_sync, int, 0);
+MODULE_PARM_DESC(comp_sync,
+ "Set composite sync signal to low (0) or high (1)");
module_param(mode, charp, 0);
MODULE_PARM_DESC(mode, "Specify resolution as
\"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
#ifdef CONFIG_MTRR
-
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