Patch "drm/i915: Use the active wm config for merging on ILK-BDW" has been added to the 4.5-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    drm/i915: Use the active wm config for merging on ILK-BDW

to the 4.5-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-i915-use-the-active-wm-config-for-merging-on-ilk-bdw.patch
and it can be found in the queue-4.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From d890565c44447db08fd9d07f5b02928a07a88c7e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Thu, 14 Jan 2016 14:53:35 +0200
Subject: drm/i915: Use the active wm config for merging on ILK-BDW
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

commit d890565c44447db08fd9d07f5b02928a07a88c7e upstream.

ilk_program_watermarks() is supposed to merge the active watermarks from
all pipes. Thus we need to use the active config too instead of some
precomputed stuff.

Fixes: aa363136866c ("drm/i915: Calculate watermark configuration during atomic check (v2)")
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-2-git-send-email-ville.syrjala@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/i915/intel_pm.c |   32 ++++++++++++++++++++++++++------
 1 file changed, 26 insertions(+), 6 deletions(-)

--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3606,23 +3606,43 @@ static void skl_update_wm(struct drm_crt
 	dev_priv->wm.skl_hw = *results;
 }
 
+static void ilk_compute_wm_config(struct drm_device *dev,
+				  struct intel_wm_config *config)
+{
+	struct intel_crtc *crtc;
+
+	/* Compute the currently _active_ config */
+	for_each_intel_crtc(dev, crtc) {
+		const struct intel_pipe_wm *wm = &crtc->wm.active.ilk;
+
+		if (!wm->pipe_enabled)
+			continue;
+
+		config->sprites_enabled |= wm->sprites_enabled;
+		config->sprites_scaled |= wm->sprites_scaled;
+		config->num_pipes_active++;
+	}
+}
+
 static void ilk_program_watermarks(struct drm_i915_private *dev_priv)
 {
 	struct drm_device *dev = dev_priv->dev;
 	struct intel_pipe_wm lp_wm_1_2 = {}, lp_wm_5_6 = {}, *best_lp_wm;
 	struct ilk_wm_maximums max;
-	struct intel_wm_config *config = &dev_priv->wm.config;
+	struct intel_wm_config config = {};
 	struct ilk_wm_values results = {};
 	enum intel_ddb_partitioning partitioning;
 
-	ilk_compute_wm_maximums(dev, 1, config, INTEL_DDB_PART_1_2, &max);
-	ilk_wm_merge(dev, config, &max, &lp_wm_1_2);
+	ilk_compute_wm_config(dev, &config);
+
+	ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_1_2, &max);
+	ilk_wm_merge(dev, &config, &max, &lp_wm_1_2);
 
 	/* 5/6 split only in single pipe config on IVB+ */
 	if (INTEL_INFO(dev)->gen >= 7 &&
-	    config->num_pipes_active == 1 && config->sprites_enabled) {
-		ilk_compute_wm_maximums(dev, 1, config, INTEL_DDB_PART_5_6, &max);
-		ilk_wm_merge(dev, config, &max, &lp_wm_5_6);
+	    config.num_pipes_active == 1 && config.sprites_enabled) {
+		ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_5_6, &max);
+		ilk_wm_merge(dev, &config, &max, &lp_wm_5_6);
 
 		best_lp_wm = ilk_find_best_result(dev, &lp_wm_1_2, &lp_wm_5_6);
 	} else {


Patches currently in stable-queue which might be from ville.syrjala@linux.intel.com are

queue-4.5/drm-i915-use-fw_domains_put_with_fifo-on-hsw.patch
queue-4.5/drm-i915-exit-cherryview_irq_handler-after-one-pass.patch
queue-4.5/drm-i915-skl_update_scaler-wants-a-rotation-bitmask-instead-of-bit-number.patch
queue-4.5/drm-i915-cleanup-phys-status-page-too.patch
queue-4.5/drm-i915-use-the-active-wm-config-for-merging-on-ilk-bdw.patch
queue-4.5/drm-i915-start-wm-computation-from-scratch-on-ilk-bdw.patch
queue-4.5/drm-i915-fix-race-condition-in-intel_dp_destroy_mst_connector.patch
queue-4.5/drm-i915-pass-the-correct-encoder-to-intel_ddi_clk_select-with-mst.patch