[Intel-gfx] [PATCH 03/12] drm/i915: Eliminate skl_latency[]

[Ville Syrjala]

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

Make SKL+ less special by eliminating the separate skl_latency[]
array and just using the normal pri/spr/cur latency arrays. The
result is 4 bytes larger (3*5+8 vs. 3*8)

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 42 +++++------------------------
 drivers/gpu/drm/i915/i915_drv.h     |  8 +++---
 drivers/gpu/drm/i915/intel_pm.c     | 16 ++++++-----
 3 files changed, 20 insertions(+), 46 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 35b4c49c9bca..e4b668f28ec0 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3817,12 +3817,7 @@ static void wm_latency_show(struct seq_file *m, const uint16_t wm[8])
 static int pri_wm_latency_show(struct seq_file *m, void *data)
 {
 	struct drm_i915_private *dev_priv = m->private;
-	const uint16_t *latencies;
-
-	if (INTEL_GEN(dev_priv) >= 9)
-		latencies = dev_priv->wm.skl_latency;
-	else
-		latencies = dev_priv->wm.pri_latency;
+	const u16 *latencies = dev_priv->wm.pri_latency;
 
 	wm_latency_show(m, latencies);
 
@@ -3832,12 +3827,7 @@ static int pri_wm_latency_show(struct seq_file *m, void *data)
 static int spr_wm_latency_show(struct seq_file *m, void *data)
 {
 	struct drm_i915_private *dev_priv = m->private;
-	const uint16_t *latencies;
-
-	if (INTEL_GEN(dev_priv) >= 9)
-		latencies = dev_priv->wm.skl_latency;
-	else
-		latencies = dev_priv->wm.spr_latency;
+	const u16 *latencies = dev_priv->wm.spr_latency;
 
 	wm_latency_show(m, latencies);
 
@@ -3847,12 +3837,7 @@ static int spr_wm_latency_show(struct seq_file *m, void *data)
 static int cur_wm_latency_show(struct seq_file *m, void *data)
 {
 	struct drm_i915_private *dev_priv = m->private;
-	const uint16_t *latencies;
-
-	if (INTEL_GEN(dev_priv) >= 9)
-		latencies = dev_priv->wm.skl_latency;
-	else
-		latencies = dev_priv->wm.cur_latency;
+	const u16 *latencies = dev_priv->wm.cur_latency;
 
 	wm_latency_show(m, latencies);
 
@@ -3940,12 +3925,7 @@ static ssize_t pri_wm_latency_write(struct file *file, const char __user *ubuf,
 {
 	struct seq_file *m = file->private_data;
 	struct drm_i915_private *dev_priv = m->private;
-	uint16_t *latencies;
-
-	if (INTEL_GEN(dev_priv) >= 9)
-		latencies = dev_priv->wm.skl_latency;
-	else
-		latencies = dev_priv->wm.pri_latency;
+	u16 *latencies = dev_priv->wm.pri_latency;
 
 	return wm_latency_write(file, ubuf, len, offp, latencies);
 }
@@ -3955,12 +3935,7 @@ static ssize_t spr_wm_latency_write(struct file *file, const char __user *ubuf,
 {
 	struct seq_file *m = file->private_data;
 	struct drm_i915_private *dev_priv = m->private;
-	uint16_t *latencies;
-
-	if (INTEL_GEN(dev_priv) >= 9)
-		latencies = dev_priv->wm.skl_latency;
-	else
-		latencies = dev_priv->wm.spr_latency;
+	u16 *latencies = dev_priv->wm.spr_latency;
 
 	return wm_latency_write(file, ubuf, len, offp, latencies);
 }
@@ -3970,12 +3945,7 @@ static ssize_t cur_wm_latency_write(struct file *file, const char __user *ubuf,
 {
 	struct seq_file *m = file->private_data;
 	struct drm_i915_private *dev_priv = m->private;
-	uint16_t *latencies;
-
-	if (INTEL_GEN(dev_priv) >= 9)
-		latencies = dev_priv->wm.skl_latency;
-	else
-		latencies = dev_priv->wm.cur_latency;
+	u16 *latencies = dev_priv->wm.cur_latency;
 
 	return wm_latency_write(file, ubuf, len, offp, latencies);
 }
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e57b8cb8fa4d..4dc8826f24b2 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1907,10 +1907,10 @@ struct drm_i915_private {
 
 	struct {
 		/* Watermark memory latency values in 0.1 us units */
-		uint16_t pri_latency[5];
-		uint16_t spr_latency[5];
-		uint16_t cur_latency[5];
-		uint16_t skl_latency[8];
+		/* Watermark memory latency values in .1 us units */
+		u16 pri_latency[8];
+		u16 spr_latency[8];
+		u16 cur_latency[8];
 
 		/* current hardware state */
 		union {
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index fe522ceae97a..4bb640acf291 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -827,9 +827,6 @@ static int intel_plane_wm_latency(struct intel_plane *plane,
 {
 	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
 
-	if (INTEL_GEN(dev_priv) >= 9)
-		return dev_priv->wm.skl_latency[level];
-
 	switch (plane->id) {
 	case PLANE_PRIMARY:
 		return dev_priv->wm.pri_latency[level];
@@ -3064,11 +3061,18 @@ static void skl_fixup_wm_latency_units(struct drm_i915_private *dev_priv,
 
 static void skl_setup_wm_latency(struct drm_i915_private *dev_priv)
 {
-	intel_read_wm_latency(dev_priv, dev_priv->wm.skl_latency);
+	intel_read_wm_latency(dev_priv, dev_priv->wm.pri_latency);
 
-	skl_fixup_wm_latency_units(dev_priv, dev_priv->wm.skl_latency);
+	skl_fixup_wm_latency_units(dev_priv, dev_priv->wm.pri_latency);
 
-	intel_print_wm_latency(dev_priv, "Gen9 Plane", dev_priv->wm.skl_latency);
+	memcpy(dev_priv->wm.spr_latency, dev_priv->wm.pri_latency,
+	       sizeof(dev_priv->wm.pri_latency));
+	memcpy(dev_priv->wm.cur_latency, dev_priv->wm.pri_latency,
+	       sizeof(dev_priv->wm.pri_latency));
+
+	intel_print_wm_latency(dev_priv, "Primary", dev_priv->wm.pri_latency);
+	intel_print_wm_latency(dev_priv, "Sprite", dev_priv->wm.spr_latency);
+	intel_print_wm_latency(dev_priv, "Cursor", dev_priv->wm.cur_latency);
 }
 
 static bool ilk_validate_pipe_wm(struct drm_device *dev,
-- 
2.18.1