drm/i915: Add missing NULL check before calling initial_watermarks

[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / i915 / intel_display.c

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index c803690293d72c4c9372f693529aceb4fced16e0..368d24728b165d68bca2d0f82905f036ed97dac7 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4957,7 +4957,8 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
         */
        intel_crtc_load_lut(crtc);
 
-       dev_priv->display.initial_watermarks(intel_crtc->config);
+       if (dev_priv->display.initial_watermarks != NULL)
+               dev_priv->display.initial_watermarks(intel_crtc->config);
        intel_enable_pipe(intel_crtc);
 
        if (intel_crtc->config->has_pch_encoder)
@@ -5056,7 +5057,10 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
        if (!intel_crtc->config->has_dsi_encoder)
                intel_ddi_enable_transcoder_func(crtc);
 
-       dev_priv->display.initial_watermarks(pipe_config);
+       if (dev_priv->display.initial_watermarks != NULL)
+               dev_priv->display.initial_watermarks(pipe_config);
+       else
+               intel_update_watermarks(crtc);
        intel_enable_pipe(intel_crtc);
 
        if (intel_crtc->config->has_pch_encoder)