From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
The DSB code will want to know the maximum PkgC latency
it has to contend with. Add a helper to expose that
information.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/skl_watermark.c | 14 ++++++++++++++
drivers/gpu/drm/i915/display/skl_watermark.h | 2 ++
2 files changed, 16 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c
index d1245c847f1c..a31adbca9dbc 100644
--- a/drivers/gpu/drm/i915/display/skl_watermark.c
+++ b/drivers/gpu/drm/i915/display/skl_watermark.c
@@ -3719,3 +3719,17 @@ void skl_watermark_debugfs_register(struct drm_i915_private *i915)
debugfs_create_file("i915_sagv_status", 0444, minor->debugfs_root, i915,
&intel_sagv_status_fops);
}
+
+unsigned int skl_watermark_max_latency(struct drm_i915_private *i915)
+{
+ int level;
+
+ for (level = i915->display.wm.num_levels - 1; level >= 0; level--) {
+ unsigned int latency = skl_wm_latency(i915, level, NULL);
+
+ if (latency)
+ return latency;
+ }
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/i915/display/skl_watermark.h b/drivers/gpu/drm/i915/display/skl_watermark.h
index f91a3d4ddc07..edb61e33df83 100644
--- a/drivers/gpu/drm/i915/display/skl_watermark.h
+++ b/drivers/gpu/drm/i915/display/skl_watermark.h
@@ -46,6 +46,8 @@ void skl_watermark_ipc_update(struct drm_i915_private *i915);
bool skl_watermark_ipc_enabled(struct drm_i915_private *i915);
void skl_watermark_debugfs_register(struct drm_i915_private *i915);
+unsigned int skl_watermark_max_latency(struct drm_i915_private *i915);
+
void skl_wm_init(struct drm_i915_private *i915);
struct intel_dbuf_state {
--
2.39.3
