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path: root/drivers/video/neofb.c
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Diffstat (limited to 'drivers/video/neofb.c')
-rw-r--r--drivers/video/neofb.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/video/neofb.c b/drivers/video/neofb.c
index b85e2b180a4..a2e201dc40f 100644
--- a/drivers/video/neofb.c
+++ b/drivers/video/neofb.c
@@ -843,6 +843,9 @@ static int neofb_set_par(struct fb_info *info)
par->SysIfaceCntl2 = 0xc0; /* VESA Bios sets this to 0x80! */
+ /* Initialize: by default, we want display config register to be read */
+ par->PanelDispCntlRegRead = 1;
+
/* Enable any user specified display devices. */
par->PanelDispCntlReg1 = 0x00;
if (par->internal_display)
@@ -1334,11 +1337,17 @@ static int neofb_blank(int blank_mode, struct fb_info *info)
struct neofb_par *par = info->par;
int seqflags, lcdflags, dpmsflags, reg;
+
/*
- * Reload the value stored in the register, might have been changed via
- * FN keystroke
+ * Reload the value stored in the register, if sensible. It might have
+ * been changed via FN keystroke.
*/
- par->PanelDispCntlReg1 = vga_rgfx(NULL, 0x20) & 0x03;
+ if (par->PanelDispCntlRegRead) {
+ neoUnlock();
+ par->PanelDispCntlReg1 = vga_rgfx(NULL, 0x20) & 0x03;
+ neoLock(&par->state);
+ }
+ par->PanelDispCntlRegRead = !blank_mode;
switch (blank_mode) {
case FB_BLANK_POWERDOWN: /* powerdown - both sync lines down */