drm/i915: Store the watermark latency values in dev_priv
Rather than having to read the latency values out every time, just
store them in dev_priv.
On ILK and IVB there is a difference between some of the latency
values for different planes, so store the latency values for each
plane type separately, and apply the necesary fixups during init.
v2: Fix some checkpatch complaints
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index a8b51d5..da1827a 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1216,6 +1216,20 @@
struct i915_suspend_saved_registers regfile;
+ struct {
+ /*
+ * Raw watermark latency values:
+ * in 0.1us units for WM0,
+ * in 0.5us units for WM1+.
+ */
+ /* primary */
+ uint16_t pri_latency[5];
+ /* sprite */
+ uint16_t spr_latency[5];
+ /* cursor */
+ uint16_t cur_latency[5];
+ } wm;
+
/* Old dri1 support infrastructure, beware the dragons ya fools entering
* here! */
struct i915_dri1_state dri1;
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index e5e0fb2..87db1f0 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2382,6 +2382,39 @@
}
}
+static void intel_fixup_spr_wm_latency(struct drm_device *dev, uint16_t wm[5])
+{
+ /* ILK sprite LP0 latency is 1300 ns */
+ if (INTEL_INFO(dev)->gen == 5)
+ wm[0] = 13;
+}
+
+static void intel_fixup_cur_wm_latency(struct drm_device *dev, uint16_t wm[5])
+{
+ /* ILK cursor LP0 latency is 1300 ns */
+ if (INTEL_INFO(dev)->gen == 5)
+ wm[0] = 13;
+
+ /* WaDoubleCursorLP3Latency:ivb */
+ if (IS_IVYBRIDGE(dev))
+ wm[3] *= 2;
+}
+
+static void intel_setup_wm_latency(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ intel_read_wm_latency(dev, dev_priv->wm.pri_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_fixup_spr_wm_latency(dev, dev_priv->wm.spr_latency);
+ intel_fixup_cur_wm_latency(dev, dev_priv->wm.cur_latency);
+}
+
static void hsw_compute_wm_parameters(struct drm_device *dev,
struct hsw_pipe_wm_parameters *params,
struct hsw_wm_maximums *lp_max_1_2,
@@ -2627,16 +2660,17 @@
struct hsw_wm_maximums lp_max_1_2, lp_max_5_6;
struct hsw_pipe_wm_parameters params[3];
struct hsw_wm_values results_1_2, results_5_6, *best_results;
- uint16_t wm[5] = {};
enum hsw_data_buf_partitioning partitioning;
- intel_read_wm_latency(dev, wm);
hsw_compute_wm_parameters(dev, params, &lp_max_1_2, &lp_max_5_6);
- hsw_compute_wm_results(dev, params, wm, &lp_max_1_2, &results_1_2);
+ hsw_compute_wm_results(dev, params,
+ dev_priv->wm.pri_latency,
+ &lp_max_1_2, &results_1_2);
if (lp_max_1_2.pri != lp_max_5_6.pri) {
- hsw_compute_wm_results(dev, params, wm, &lp_max_5_6,
- &results_5_6);
+ hsw_compute_wm_results(dev, params,
+ dev_priv->wm.pri_latency,
+ &lp_max_5_6, &results_5_6);
best_results = hsw_find_best_result(&results_1_2, &results_5_6);
} else {
best_results = &results_1_2;
@@ -5229,8 +5263,12 @@
/* For FIFO watermark updates */
if (HAS_PCH_SPLIT(dev)) {
+ intel_setup_wm_latency(dev);
+
if (IS_GEN5(dev)) {
- if (I915_READ(MLTR_ILK) & ILK_SRLT_MASK)
+ if (dev_priv->wm.pri_latency[1] &&
+ dev_priv->wm.spr_latency[1] &&
+ dev_priv->wm.cur_latency[1])
dev_priv->display.update_wm = ironlake_update_wm;
else {
DRM_DEBUG_KMS("Failed to get proper latency. "
@@ -5239,7 +5277,9 @@
}
dev_priv->display.init_clock_gating = ironlake_init_clock_gating;
} else if (IS_GEN6(dev)) {
- if (SNB_READ_WM0_LATENCY()) {
+ if (dev_priv->wm.pri_latency[0] &&
+ dev_priv->wm.spr_latency[0] &&
+ dev_priv->wm.cur_latency[0]) {
dev_priv->display.update_wm = sandybridge_update_wm;
dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm;
} else {
@@ -5249,7 +5289,9 @@
}
dev_priv->display.init_clock_gating = gen6_init_clock_gating;
} else if (IS_IVYBRIDGE(dev)) {
- if (SNB_READ_WM0_LATENCY()) {
+ if (dev_priv->wm.pri_latency[0] &&
+ dev_priv->wm.spr_latency[0] &&
+ dev_priv->wm.cur_latency[0]) {
dev_priv->display.update_wm = ivybridge_update_wm;
dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm;
} else {
@@ -5259,7 +5301,9 @@
}
dev_priv->display.init_clock_gating = ivybridge_init_clock_gating;
} else if (IS_HASWELL(dev)) {
- if (I915_READ64(MCH_SSKPD)) {
+ if (dev_priv->wm.pri_latency[0] &&
+ dev_priv->wm.spr_latency[0] &&
+ dev_priv->wm.cur_latency[0]) {
dev_priv->display.update_wm = haswell_update_wm;
dev_priv->display.update_sprite_wm =
haswell_update_sprite_wm;