Based on computed crtc config, stage any updates to scaling ratios.

Also call intel_atomic_setup_scalers() to stage scaler assignments
if crtc compute config staged any changes to its scaler needs.

Above actions should be moved to atomic crtc once it is available.

v2:
-moved gen comparision check to caller (Matt)

Signed-off-by: Chandra Konduru <chandra.kond...@intel.com>
---
 drivers/gpu/drm/i915/intel_display.c |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index 834ea46..166b9d6 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5863,6 +5863,7 @@ static int intel_crtc_compute_config(struct intel_crtc 
*crtc,
        struct drm_device *dev = crtc->base.dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct drm_display_mode *adjusted_mode = 
&pipe_config->base.adjusted_mode;
+       int ret;
 
        /* FIXME should check pixel clock limits on all platforms */
        if (INTEL_INFO(dev)->gen < 4) {
@@ -5917,7 +5918,17 @@ static int intel_crtc_compute_config(struct intel_crtc 
*crtc,
        if (pipe_config->has_pch_encoder)
                return ironlake_fdi_compute_config(crtc, pipe_config);
 
-       return 0;
+       if (INTEL_INFO(dev)->gen >= 9)
+               skl_update_scaling_ratio(dev, pipe_config);
+
+       /* FIXME: remove below call once atomic mode set is place and all crtc
+        * related checks called from atomic_crtc_check function */
+       ret = 0;
+       DRM_DEBUG_KMS("intel_crtc = %p drm_state (pipe_config->base.state) = 
%p\n",
+               crtc, pipe_config->base.state);
+       ret = intel_atomic_setup_scalers(dev, crtc, pipe_config);
+
+       return ret;
 }
 
 static int skylake_get_display_clock_speed(struct drm_device *dev)
-- 
1.7.9.5

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