From 31d1d3c8862e88c8db1b0c9a560f2a76b1a4972b Mon Sep 17 00:00:00 2001
From: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Date: Tue, 17 Oct 2017 23:08:11 +0300
Subject: [PATCH] drm/i915: adjust get_crtc_fence_y_offset() to use base.y instead of crtc.y
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Git-commit: 31d1d3c8862e88c8db1b0c9a560f2a76b1a4972b
Patch-mainline: v4.15-rc1
References: FATE#322643 bsc#1055900

This is to use clipped y coordinate here. I left get_crtc_fence_y_offset()
function itself in place as oneliner to maintain comment above it why this
is done.

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1508270891-22186-6-git-send-email-juhapekka.heikkila@gmail.com
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/i915_drv.h  |    2 ++
 drivers/gpu/drm/i915/intel_fbc.c |   10 ++++------
 2 files changed, 6 insertions(+), 6 deletions(-)

--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1116,6 +1116,8 @@ struct intel_fbc {
 			 */
 			int adjusted_x;
 			int adjusted_y;
+
+			int y;
 		} plane;
 
 		struct {
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -69,12 +69,9 @@ static inline bool no_fbc_on_multiple_pi
  * address we program because it starts at the real start of the buffer, so we
  * have to take this into consideration here.
  */
-static unsigned int get_crtc_fence_y_offset(struct intel_crtc *crtc)
+static unsigned int get_crtc_fence_y_offset(struct intel_fbc *fbc)
 {
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
-	struct intel_fbc *fbc = &dev_priv->fbc;
-
-	return crtc->base.y - fbc->state_cache.plane.adjusted_y;
+	return fbc->state_cache.plane.y - fbc->state_cache.plane.adjusted_y;
 }
 
 /*
@@ -762,6 +759,7 @@ static void intel_fbc_update_state_cache
 	cache->plane.visible = plane_state->base.visible;
 	cache->plane.adjusted_x = plane_state->main.x;
 	cache->plane.adjusted_y = plane_state->main.y;
+	cache->plane.y = plane_state->base.src.y1 >> 16;
 
 	if (!cache->plane.visible)
 		return;
@@ -893,7 +891,7 @@ static void intel_fbc_get_reg_params(str
 
 	params->crtc.pipe = crtc->pipe;
 	params->crtc.plane = crtc->plane;
-	params->crtc.fence_y_offset = get_crtc_fence_y_offset(crtc);
+	params->crtc.fence_y_offset = get_crtc_fence_y_offset(fbc);
 
 	params->fb.format = cache->fb.format;
 	params->fb.stride = cache->fb.stride;