From 1d07fa059a6628eefd9ad57261cd1d67237385ab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Tue, 6 Aug 2013 22:24:03 +0300
Subject: drm/i915: Kill fbc_enable from hsw_lp_wm_results
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We don't need to store the FBC WM enabled status in each watermark
level. We anyway have to reduce it down to a single boolean, so just
delay checking the FBC WM limit until we're computing the final
value.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 71fff20ff1bb790f4defe0c880e028581ffab420)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 0d9f56fced55..58426cff7d09 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2182,7 +2182,6 @@ struct hsw_wm_maximums {
 
 struct hsw_lp_wm_result {
 	bool enable;
-	bool fbc_enable;
 	uint32_t pri_val;
 	uint32_t spr_val;
 	uint32_t cur_val;
@@ -2324,13 +2323,6 @@ static bool hsw_compute_lp_wm(struct drm_i915_private *dev_priv,
 	result->fbc_val = max3(res[0].fbc_val, res[1].fbc_val, res[2].fbc_val);
 	result->enable = true;
 
-	if (result->fbc_val > max->fbc) {
-		result->fbc_enable = false;
-		result->fbc_val = 0;
-	} else {
-		result->fbc_enable = true;
-	}
-
 	if (!result->enable)
 		return false;
 
@@ -2575,9 +2567,9 @@ static void hsw_compute_wm_results(struct drm_device *dev,
 	 * a WM level. */
 	results->enable_fbc_wm = true;
 	for (level = 1; level <= max_level; level++) {
-		if (!lp_results[level - 1].fbc_enable) {
+		if (!lp_results[level - 1].fbc_val > lp_maximums->fbc) {
 			results->enable_fbc_wm = false;
-			break;
+			lp_results[level - 1].fbc_val = 0;
 		}
 	}
 
-- 
1.8.5.rc3