drm/i915: Make encoder->mode_set callbacks optional

For a bunch of reasons we want to move away from the ->mode_set
callbacks: All hw state setup needs to move into ->enable hooks (so
that DOMS can do runtime pm) and all the configuration setup needs to
move into the compute_config functions.

To start with this make the enocer->mode_set callback optional.

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4dbbda2..d3e7263 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7210,7 +7210,9 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
                        encoder->base.base.id,
                        drm_get_encoder_name(&encoder->base),
                        mode->base.id, mode->name);
-               encoder->mode_set(encoder);
+
+               if (encoder->mode_set)
+                       encoder->mode_set(encoder);
        }
 
        return 0;