From 11f489d3c62b1e55efbc5f1ab058d85851a96d0e Mon Sep 17 00:00:00 2001
From: Mahesh Kumar <mahesh1.kumar@intel.com>
Date: Fri, 30 Jun 2017 17:40:59 +0530
Subject: [PATCH] drm/i915/skl+: Check for supported plane configuration in Interlace mode
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Git-commit: 11f489d3c62b1e55efbc5f1ab058d85851a96d0e
Patch-mainline: v4.14-rc1
References: FATE#322643 bsc#1055900

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 Syrj채l채 <ville.syrjala@linux.intel.com>
Signed-off-by: Ville Syrj채l채 <ville.syrjala@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/intel_atomic_plane.c |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

--- 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 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(
 	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);