drm: fixes crct set_mode when crtc mode_fixup is null.

This patch set nukes all the dummy crtc mode_fixup implementations.
(made on top of Daniel topic/drm-misc branch)

Signed-off-by: Carlos Palminha <palminha@synopsys.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/9d41105dee6632b4bb50e9555f2196ac249b9fce.1455630967.git.palminha@synopsys.com

diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index e70d064693ee9a10807540a4a953f3495b8bca05..7539eea4ccbcebcd491bc51469e61cf593d289cc 100644 (file)
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -343,9 +343,12 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
                }
        }
 
-       if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
-               DRM_DEBUG_KMS("CRTC fixup failed\n");
-               goto done;
+       if (crtc_funcs->mode_fixup) {
+               if (!(ret = crtc_funcs->mode_fixup(crtc, mode,
+                                               adjusted_mode))) {
+                       DRM_DEBUG_KMS("CRTC fixup failed\n");
+                       goto done;
+               }
        }
        DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);