X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=drivers%2Fgpu%2Fdrm%2Fdrm_modes.c;h=7689c14f2f09b2f9064f4067f1752c69d7c1e16a;hb=ecb7e16bf187bc369cf6a5cd108582c01329980d;hp=6d8b941c8200414f1bf3b193cbdc395c27e8622d;hpb=93dc1b6529eb8acd98243caaf399daf3c2c665bd;p=karo-tx-linux.git

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 6d8b941c8200..7689c14f2f09 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -739,6 +739,8 @@ EXPORT_SYMBOL(drm_mode_vrefresh);
  * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for
  *   buffers containing two eyes (only adjust the timings when needed, eg. for
  *   "frame packing" or "side by side full").
+ * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not*
+ *   be performed for doublescan and vscan > 1 modes respectively.
  */
 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
 {
@@ -765,18 +767,22 @@ void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
 		}
 	}
 
-	if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
-		p->crtc_vdisplay *= 2;
-		p->crtc_vsync_start *= 2;
-		p->crtc_vsync_end *= 2;
-		p->crtc_vtotal *= 2;
+	if (!(adjust_flags & CRTC_NO_DBLSCAN)) {
+		if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
+			p->crtc_vdisplay *= 2;
+			p->crtc_vsync_start *= 2;
+			p->crtc_vsync_end *= 2;
+			p->crtc_vtotal *= 2;
+		}
 	}
 
-	if (p->vscan > 1) {
-		p->crtc_vdisplay *= p->vscan;
-		p->crtc_vsync_start *= p->vscan;
-		p->crtc_vsync_end *= p->vscan;
-		p->crtc_vtotal *= p->vscan;
+	if (!(adjust_flags & CRTC_NO_VSCAN)) {
+		if (p->vscan > 1) {
+			p->crtc_vdisplay *= p->vscan;
+			p->crtc_vsync_start *= p->vscan;
+			p->crtc_vsync_end *= p->vscan;
+			p->crtc_vtotal *= p->vscan;
+		}
 	}
 
 	if (adjust_flags & CRTC_STEREO_DOUBLE) {