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drm/i915: Introduce skl_watermark_max_latency()

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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@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230606191504.18099-16-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
This commit is contained in:
Ville Syrjälä 2023-06-06 22:15:00 +03:00
parent 7678e089bd
commit b4283282c9
2 changed files with 16 additions and 0 deletions
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14
drivers/gpu/drm/i915/display/skl_watermark.c
View File

@ -3721,3 +3721,17 @@ 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;
}

2
drivers/gpu/drm/i915/display/skl_watermark.h
View File

@ -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 {