From b43247a865f73fa3b73a878236b5055bfb864169 Mon Sep 17 00:00:00 2001
From: Fedora Kernel Team <kernel-team@fedoraproject.org>
Date: Mon, 20 Jun 2016 12:41:23 +0200
Subject: [PATCH 13/17] drm/i915/gen9: Use a bitmask to track dirty pipe
 watermarks

Upstream: since drm-intel-next-2016-05-22
commit 2b4b9f35d94b1b533bc23110b040b04316480b28

Author:     Matt Roper <matthew.d.roper@intel.com>
AuthorDate: Thu May 12 07:06:07 2016 -0700
Commit:     Matt Roper <matthew.d.roper@intel.com>
CommitDate: Fri May 13 07:34:40 2016 -0700

    drm/i915/gen9: Use a bitmask to track dirty pipe watermarks

    Slightly easier to work with than an array of bools.

    Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
    Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
    Link: http://patchwork.freedesktop.org/patch/msgid/1463061971-19638-14-git-send-email-matthew.d.roper@intel.com
---
 drivers/gpu/drm/i915/i915_drv.h |  2 +-
 drivers/gpu/drm/i915/intel_pm.c | 10 +++++-----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 237df9f..67c76b6 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1615,7 +1615,7 @@ struct skl_ddb_allocation {
 };
 
 struct skl_wm_values {
-	bool dirty[I915_MAX_PIPES];
+	unsigned dirty_pipes;
 	struct skl_ddb_allocation ddb;
 	uint32_t wm_linetime[I915_MAX_PIPES];
 	uint32_t plane[I915_MAX_PIPES][I915_MAX_PLANES][8];
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index cd29ab6..611c5a1 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3455,7 +3455,7 @@ static void skl_write_wm_values(struct drm_i915_private *dev_priv,
 		int i, level, max_level = ilk_wm_max_level(dev);
 		enum pipe pipe = crtc->pipe;
 
-		if (!new->dirty[pipe])
+		if ((new->dirty_pipes & drm_crtc_mask(&crtc->base)) == 0)
 			continue;
 
 		I915_WRITE(PIPE_WM_LINETIME(pipe), new->wm_linetime[pipe]);
@@ -3680,7 +3680,7 @@ static void skl_update_other_pipe_wm(struct drm_device *dev,
 		WARN_ON(!wm_changed);
 
 		skl_compute_wm_results(dev, &pipe_wm, r, intel_crtc);
-		r->dirty[intel_crtc->pipe] = true;
+		r->dirty_pipes |= drm_crtc_mask(&intel_crtc->base);
 	}
 }
 
@@ -3783,7 +3783,7 @@ static void skl_update_wm(struct drm_crtc *crtc)
 
 
 	/* Clear all dirty flags */
-	memset(results->dirty, 0, sizeof(bool) * I915_MAX_PIPES);
+	results->dirty_pipes = 0;
 
 	skl_clear_wm(results, intel_crtc->pipe);
 
@@ -3791,7 +3791,7 @@ static void skl_update_wm(struct drm_crtc *crtc)
 		return;
 
 	skl_compute_wm_results(dev, pipe_wm, results, intel_crtc);
-	results->dirty[intel_crtc->pipe] = true;
+	results->dirty_pipes |= drm_crtc_mask(&intel_crtc->base);
 
 	skl_update_other_pipe_wm(dev, crtc, results);
 	skl_write_wm_values(dev_priv, results);
@@ -3952,7 +3952,7 @@ static void skl_pipe_wm_get_hw_state(struct drm_crtc *crtc)
 	if (!intel_crtc->active)
 		return;
 
-	hw->dirty[pipe] = true;
+	hw->dirty_pipes |= drm_crtc_mask(crtc);
 
 	active->linetime = hw->wm_linetime[pipe];
 
-- 
2.7.4