[PATCH] Fix console blanking
Current console blanking code is broken. It will first do a normal blank, then start the VESA blank timer if vesa_off_interval != 0, and then proceed to do the VESA blanking directly. After the timer expires it will do the VESA blanking a second time. Also the vesa_powerdown() function doesn't allow all VESA modes to be used. With this patch the behaviour is: 1. Blank: vesa_off_interval != 0 -> Do normal blank vesa_off_interval == 0 -> Do VESA blank 2. Start the VESA blank timer if vesa_off_interval != 0 and vesa_power_mode != 0. It also gets rid of the limiting vesa_powerdown() function. Signed-off-by: Ville Syrjala <syrjala@sci.fi> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -2758,29 +2758,6 @@ static void set_vesa_blanking(char __user *p)
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vesa_blank_mode = (mode < 4) ? mode : 0;
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}
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/*
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* This is called by a timer handler
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*/
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static void vesa_powerdown(void)
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{
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struct vc_data *c = vc_cons[fg_console].d;
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/*
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* Power down if currently suspended (1 or 2),
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* suspend if currently blanked (0),
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* else do nothing (i.e. already powered down (3)).
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* Called only if powerdown features are allowed.
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*/
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switch (vesa_blank_mode) {
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case VESA_NO_BLANKING:
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c->vc_sw->con_blank(c, VESA_VSYNC_SUSPEND+1, 0);
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break;
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case VESA_VSYNC_SUSPEND:
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case VESA_HSYNC_SUSPEND:
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c->vc_sw->con_blank(c, VESA_POWERDOWN+1, 0);
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break;
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}
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}
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void do_blank_screen(int entering_gfx)
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{
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struct vc_data *vc = vc_cons[fg_console].d;
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@ -2791,8 +2768,7 @@ void do_blank_screen(int entering_gfx)
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if (console_blanked) {
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if (blank_state == blank_vesa_wait) {
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blank_state = blank_off;
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vesa_powerdown();
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vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
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}
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return;
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}
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@ -2822,7 +2798,7 @@ void do_blank_screen(int entering_gfx)
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save_screen(vc);
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/* In case we need to reset origin, blanking hook returns 1 */
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i = vc->vc_sw->con_blank(vc, 1, 0);
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i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
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console_blanked = fg_console + 1;
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if (i)
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set_origin(vc);
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@ -2830,13 +2806,10 @@ void do_blank_screen(int entering_gfx)
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if (console_blank_hook && console_blank_hook(1))
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return;
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if (vesa_off_interval) {
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if (vesa_off_interval && vesa_blank_mode) {
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blank_state = blank_vesa_wait;
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mod_timer(&console_timer, jiffies + vesa_off_interval);
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}
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if (vesa_blank_mode)
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vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
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}
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EXPORT_SYMBOL(do_blank_screen);
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