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lxfb: fix console blanking 

Simply enabling DAC blanking without turning off the CRT seems to be resulting
in characters remaining on the screen when the monitor blanks.  This patch
turns off the CRT for all modes, and also powers down the DACs when vsync
and/or hsync are disabled.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Acked-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jordan Crouse 2008-07-23 21:31:43 -07:00 committed by Linus Torvalds
parent be935d5b63
commit 104b198dd0
1 changed files with 18 additions and 10 deletions
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28
drivers/video/geode/lxfb_ops.c
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@ -517,25 +517,25 @@ void lx_set_palette_reg(struct fb_info *info, unsigned regno,
int lx_blank_display(struct fb_info *info, int blank_mode)
{
struct lxfb_par *par = info->par;
u32 dcfg, fp_pm;
int blank, hsync, vsync, crt;
u32 dcfg, misc, fp_pm;
int blank, hsync, vsync;
/* CRT power saving modes. */
switch (blank_mode) {
case FB_BLANK_UNBLANK:
blank = 0; hsync = 1; vsync = 1; crt = 1;
blank = 0; hsync = 1; vsync = 1;
break;
case FB_BLANK_NORMAL:
blank = 1; hsync = 1; vsync = 1; crt = 1;
blank = 1; hsync = 1; vsync = 1;
break;
case FB_BLANK_VSYNC_SUSPEND:
blank = 1; hsync = 1; vsync = 0; crt = 1;
blank = 1; hsync = 1; vsync = 0;
break;
case FB_BLANK_HSYNC_SUSPEND:
blank = 1; hsync = 0; vsync = 1; crt = 1;
blank = 1; hsync = 0; vsync = 1;
break;
case FB_BLANK_POWERDOWN:
blank = 1; hsync = 0; vsync = 0; crt = 0;
blank = 1; hsync = 0; vsync = 0;
break;
default:
return -EINVAL;
@ -545,15 +545,23 @@ int lx_blank_display(struct fb_info *info, int blank_mode)
dcfg &= ~(VP_DCFG_DAC_BL_EN | VP_DCFG_HSYNC_EN | VP_DCFG_VSYNC_EN |
VP_DCFG_CRT_EN);
if (!blank)
dcfg |= VP_DCFG_DAC_BL_EN;
dcfg |= VP_DCFG_DAC_BL_EN | VP_DCFG_CRT_EN;
if (hsync)
dcfg |= VP_DCFG_HSYNC_EN;
if (vsync)
dcfg |= VP_DCFG_VSYNC_EN;
if (crt)
dcfg |= VP_DCFG_CRT_EN;
write_vp(par, VP_DCFG, dcfg);
misc = read_vp(par, VP_MISC);
if (vsync && hsync)
misc &= ~VP_MISC_DACPWRDN;
else
misc |= VP_MISC_DACPWRDN;
write_vp(par, VP_MISC, misc);
/* Power on/off flat panel */
if (par->output & OUTPUT_PANEL) {