drm/i915/skl+: Check for supported plane configuration in Interlace mode

In Gen9 platform Interlaced fetch mode doesn't support following plane
configuration:
 - Y/Yf tiling
 - 90/270 rotation
 - YUV420 hybrid planar source pixel formats.

This patch adds check to fail the flip if any of the above configuration
is requested.

Changes since V1:
 - handle checks in intel_plane_atomic_check_with_state (ville)
 - takeout plane scaler checks combile with pipe scaler in next patch
Changes since V2:
 - No need to check for NV12 as it need scaling, so it will be rejected
   by scaling check (ville)

Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170630121100.20159-2-mahesh1.kumar@intel.com
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90238
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c
index 4325cb0a04f5..ee76fab7bb6f 100644
--- a/drivers/gpu/drm/i915/intel_atomic_plane.c
+++ b/drivers/gpu/drm/i915/intel_atomic_plane.c
@@ -114,6 +114,8 @@ int intel_plane_atomic_check_with_state(struct intel_crtc_state *crtc_state,
         struct drm_i915_private *dev_priv = to_i915(plane->dev);
         struct drm_plane_state *state = &intel_state->base;
         struct intel_plane *intel_plane = to_intel_plane(plane);
+        const struct drm_display_mode *adjusted_mode =
+                &crtc_state->base.adjusted_mode;
         int ret;
 
         /*
@@ -173,6 +175,19 @@ int intel_plane_atomic_check_with_state(struct intel_crtc_state *crtc_state,
         if (ret)
                 return ret;
 
+        /*
+         * Y-tiling is not supported in IF-ID Interlace mode in
+         * GEN9 and above.
+         */
+        if (state->fb && INTEL_GEN(dev_priv) >= 9 && crtc_state->base.enable &&
+            adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
+                if (state->fb->modifier == I915_FORMAT_MOD_Y_TILED ||
+                    state->fb->modifier == I915_FORMAT_MOD_Yf_TILED) {
+                        DRM_DEBUG_KMS("Y/Yf tiling not supported in IF-ID mode\n");
+                        return -EINVAL;
+                }
+        }
+
         /* FIXME pre-g4x don't work like this */
         if (intel_state->base.visible)
                 crtc_state->active_planes |= BIT(intel_plane->id);