From: "Ville Syrjälä" <syrjala@sci.fi>
To: linux-fbdev-devel@lists.sourceforge.net
Subject: [PATCH] atyfb: Blank LCD by turning off backlight voltage
Date: Thu, 17 Jun 2004 12:53:41 +0300 [thread overview]
Message-ID: <20040617095341.GC28687@sci.fi> (raw)
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This patch makes the blanking code turn the backlight voltage on/off.
--
Ville Syrjälä
syrjala@sci.fi
http://www.sci.fi/~syrjala/
[-- Attachment #2: atyfb-2.6-lcd_blank.patch --]
[-- Type: text/plain, Size: 1138 bytes --]
diff -urN linux-orig/drivers/video/aty/atyfb_base.c linux/drivers/video/aty/atyfb_base.c
--- linux-orig/drivers/video/aty/atyfb_base.c 2004-06-17 11:41:21.265972568 +0300
+++ linux/drivers/video/aty/atyfb_base.c 2004-06-17 11:40:45.733374344 +0300
@@ -2464,7 +2464,14 @@
#ifdef CONFIG_PMAC_BACKLIGHT
if ((_machine == _MACH_Pmac) && blank)
set_backlight_enable(0);
-#endif /* CONFIG_PMAC_BACKLIGHT */
+#elif defined(CONFIG_FB_ATY_GENERIC_LCD)
+ if (par->lcd_table && blank &&
+ (aty_ld_lcd(LCD_GEN_CNTL, par) & LCD_ON)) {
+ u32 pm = aty_ld_lcd(POWER_MANAGEMENT, par);
+ pm &= ~PWR_BLON;
+ aty_st_lcd(POWER_MANAGEMENT, pm, par);
+ }
+#endif
gen_cntl = aty_ld_8(CRTC_GEN_CNTL, par);
if (blank > 0)
@@ -2488,7 +2495,15 @@
#ifdef CONFIG_PMAC_BACKLIGHT
if ((_machine == _MACH_Pmac) && !blank)
set_backlight_enable(1);
-#endif /* CONFIG_PMAC_BACKLIGHT */
+#elif defined(CONFIG_FB_ATY_GENERIC_LCD)
+ if (par->lcd_table && !blank &&
+ (aty_ld_lcd(LCD_GEN_CNTL, par) & LCD_ON)) {
+ u32 pm = aty_ld_lcd(POWER_MANAGEMENT, par);
+ pm |= PWR_BLON;
+ aty_st_lcd(POWER_MANAGEMENT, pm, par);
+ }
+#endif
+
return 0;
}
reply other threads:[~2004-06-17 9:53 UTC|newest]
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