ref: 4e938841f02de646d4e2e428453cbeede4051a57
parent: 0c7fe8ae0679c3216cb145ee6ceb5f075af1bddd
author: mischief <mischief@offblast.org>
date: Tue Aug 21 07:31:45 EDT 2018
igfx: support blanking by turning off panel power and backlight tested on t61, x200, x230, x301, t420, w520
--- a/sys/src/9/pc/vgaigfx.c
+++ b/sys/src/9/pc/vgaigfx.c
@@ -55,9 +55,46 @@
scr->softscreen = 1;
}
+static void
+igfxblank(VGAscr *scr, int blank)
+{+ u32int off;
+
+ switch(scr->pci->did){+ default:
+ return;
+
+ case 0x2a02: /* GM965 */
+ case 0x2a42: /* GM45 */
+ off = 0x61204;
+ break;
+
+ case 0x0126: /* SNB */
+ case 0x0166: /* IVB */
+ off = 0xC7204;
+ break;
+ }
+
+ /* toggle PP_CONTROL backlight & power state */
+ if(blank)
+ scr->mmio[off/4] &= ~0x5;
+ else
+ scr->mmio[off/4] |= 0x5;
+}
+
+static void
+igfxdrawinit(VGAscr *scr)
+{+ scr->blank = igfxblank;
+}
+
VGAdev vgaigfxdev = {"igfx",
igfxenable,
+ nil,
+ nil,
+ nil,
+ igfxdrawinit,
};
static void