i915: add blanking support to intelfb

Got tired of not having my LCD actually turn off when I left the machine at the
console.

diff --git a/linux-core/intel_fb.c b/linux-core/intel_fb.c
index 1678841..0780aae 100644 (file)
--- a/linux-core/intel_fb.c
+++ b/linux-core/intel_fb.c
@@ -525,6 +525,92 @@ static int intelfb_pan_display(struct fb_var_screeninfo *var,
        return ret;
 }
 
+static void intelfb_on(struct fb_info *info)
+{
+       struct intelfb_par *par = info->par;
+       struct drm_device *dev = par->dev;
+       struct drm_crtc *crtc;
+       struct drm_encoder *encoder;
+       int i;
+
+       /*
+        * For each CRTC in this fb, find all associated encoders
+        * and turn them off, then turn off the CRTC.
+        */
+       list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+               struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
+
+               for (i = 0; i < par->crtc_count; i++)
+                       if (crtc->base.id == par->crtc_ids[i])
+                               break;
+
+               crtc_funcs->dpms(crtc, DPMSModeOn);
+
+               /* Found a CRTC on this fb, now find encoders */
+               list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+                       if (encoder->crtc == crtc) {
+                               struct drm_encoder_helper_funcs *encoder_funcs;
+                               encoder_funcs = encoder->helper_private;
+                               encoder_funcs->dpms(encoder, DPMSModeOn);
+                       }
+               }
+       }
+}
+
+static void intelfb_off(struct fb_info *info, int dpms_mode)
+{
+       struct intelfb_par *par = info->par;
+       struct drm_device *dev = par->dev;
+       struct drm_crtc *crtc;
+       struct drm_encoder *encoder;
+       int i;
+
+       /*
+        * For each CRTC in this fb, find all associated encoders
+        * and turn them off, then turn off the CRTC.
+        */
+       list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+               struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
+
+               for (i = 0; i < par->crtc_count; i++)
+                       if (crtc->base.id == par->crtc_ids[i])
+                               break;
+
+               /* Found a CRTC on this fb, now find encoders */
+               list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+                       if (encoder->crtc == crtc) {
+                               struct drm_encoder_helper_funcs *encoder_funcs;
+                               encoder_funcs = encoder->helper_private;
+                               encoder_funcs->dpms(encoder, dpms_mode);
+                       }
+               }
+               if (dpms_mode == DPMSModeOff)
+                       crtc_funcs->dpms(crtc, dpms_mode);
+       }
+}
+
+int intelfb_blank(int blank, struct fb_info *info)
+{
+       switch (blank) {
+       case FB_BLANK_UNBLANK:
+               intelfb_on(info);
+               break;
+       case FB_BLANK_NORMAL:
+               intelfb_off(info, DPMSModeStandby);
+               break;
+       case FB_BLANK_HSYNC_SUSPEND:
+               intelfb_off(info, DPMSModeStandby);
+               break;
+       case FB_BLANK_VSYNC_SUSPEND:
+               intelfb_off(info, DPMSModeSuspend);
+               break;
+       case FB_BLANK_POWERDOWN:
+               intelfb_off(info, DPMSModeOff);
+               break;
+       }
+       return 0;
+}
+
 static struct fb_ops intelfb_ops = {
        .owner = THIS_MODULE,
        //.fb_open = intelfb_open,
@@ -539,6 +625,7 @@ static struct fb_ops intelfb_ops = {
        .fb_copyarea = cfb_copyarea, //intelfb_copyarea,
        .fb_imageblit = cfb_imageblit, //intelfb_imageblit,
        .fb_pan_display = intelfb_pan_display,
+       .fb_blank = intelfb_blank,
 };
 
 /**