linux-kernel - [PATCH 08/10] drm/i915/gen9: Add skl_wm_level

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Date:   Fri,  7 Oct 2016 20:11:32 -0400
From:   Lyude <cpaul@...hat.com>
To:     intel-gfx@...ts.freedesktop.org
Cc:     Lyude <cpaul@...hat.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>,
        Paulo Zanoni <paulo.r.zanoni@...el.com>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH 08/10] drm/i915/gen9: Add skl_wm_level_equals()

Helper we're going to be using for implementing verification of the wm
levels in skl_verify_wm_level().

Signed-off-by: Lyude <cpaul@...hat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@...ux.intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@...el.com>
---
 drivers/gpu/drm/i915/intel_drv.h |  2 ++
 drivers/gpu/drm/i915/intel_pm.c  | 14 ++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 73a2d16d..3e6e9af 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1761,6 +1761,8 @@ void skl_pipe_wm_get_hw_state(struct drm_crtc *crtc,
 bool intel_can_enable_sagv(struct drm_atomic_state *state);
 int intel_enable_sagv(struct drm_i915_private *dev_priv);
 int intel_disable_sagv(struct drm_i915_private *dev_priv);
+bool skl_wm_level_equals(const struct skl_wm_level *l1,
+			 const struct skl_wm_level *l2);
 bool skl_ddb_allocation_equals(const struct skl_ddb_allocation *old,
 			       const struct skl_ddb_allocation *new,
 			       enum pipe pipe);
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 27a520ce..6af1587 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3853,6 +3853,20 @@ void skl_write_cursor_wm(struct intel_crtc *intel_crtc,
 			    &ddb->plane[pipe][PLANE_CURSOR]);
 }
 
+bool skl_wm_level_equals(const struct skl_wm_level *l1,
+			 const struct skl_wm_level *l2)
+{
+	if (l1->plane_en != l2->plane_en)
+		return false;
+
+	/* If both planes aren't enabled, the rest shouldn't matter */
+	if (!l1->plane_en)
+		return true;
+
+	return (l1->plane_res_l == l2->plane_res_l &&
+		l1->plane_res_b == l2->plane_res_b);
+}
+
 static inline bool skl_ddb_entries_overlap(const struct skl_ddb_entry *a,
 					   const struct skl_ddb_entry *b)
 {
-- 
2.7.4