From: "Antonino A. Daplas" 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 Acked-by: Alexander Kern Signed-off-by: Andrew Morton --- 25-akpm/drivers/video/aty/atyfb_base.c | 13 +++++++++++++ 1 files changed, 13 insertions(+) diff -puN drivers/video/aty/atyfb_base.c~atyfb-add-boot-module-option-to-override-composite-sync drivers/video/aty/atyfb_base.c --- 25/drivers/video/aty/atyfb_base.c~atyfb-add-boot-module-option-to-override-composite-sync Mon Mar 14 15:23:44 2005 +++ 25-akpm/drivers/video/aty/atyfb_base.c Mon Mar 14 15:23:44 2005 @@ -307,6 +307,7 @@ static int vram; 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 @@ static int __init aty_init(struct fb_inf 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 @@ static int __init atyfb_setup(char *opti 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_param(mclk, int, 0); 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 \"x[-][@]\" "); #ifdef CONFIG_MTRR _