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drm/i915/gen9+: Kill off hw_ddb from intel_crtc.

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dev_priv->hw_ddb is only used by skl_update_crtcs, but the ddb
allocation for each pipe is calculated in crtc_state.

We can rid of the global member by looking at crtc_state.
Do this by saving all active old ddb allocations from the old crtc_state
in an array, and then point them to the new allocation every time we update
a crtc.

This will allow us to keep track of the intermediate ddb allocations,
which is what hw_ddb was previously used for. With hw_ddb gone all
SKL-style watermark values are properly maintained only in crtc_state.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1478609742-13603-5-git-send-email-maarten.lankhorst@linux.intel.com
[mlankhorst: Reword commit message.]
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
This commit is contained in:
Maarten Lankhorst
2016-11-08 13:55:35 +01:00
parent 512b552798
commit 5eff503b9d
3 changed files with 21 additions and 28 deletions
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23
drivers/gpu/drm/i915/intel_pm.c
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@@ -3913,25 +3913,16 @@ static inline bool skl_ddb_entries_overlap(const struct skl_ddb_entry *a,
return a->start < b->end && b->start < a->end;
}
bool skl_ddb_allocation_overlaps(struct drm_atomic_state *state,
struct intel_crtc *intel_crtc)
bool skl_ddb_allocation_overlaps(const struct skl_ddb_entry **entries,
const struct skl_ddb_entry *ddb,
int ignore)
{
struct drm_crtc *other_crtc;
struct drm_crtc_state *other_cstate;
struct intel_crtc *other_intel_crtc;
const struct skl_ddb_entry *ddb =
&to_intel_crtc_state(intel_crtc->base.state)->wm.skl.ddb;
int i;
for_each_crtc_in_state(state, other_crtc, other_cstate, i) {
other_intel_crtc = to_intel_crtc(other_crtc);
if (other_intel_crtc == intel_crtc)
continue;
if (skl_ddb_entries_overlap(ddb, &other_intel_crtc->hw_ddb))
for (i = 0; i < I915_MAX_PIPES; i++)
if (i != ignore && entries[i] &&
skl_ddb_entries_overlap(ddb, entries[i]))
return true;
}
return false;
}
@@ -4241,8 +4232,6 @@ static void skl_initial_wm(struct intel_atomic_state *state,
skl_copy_wm_for_pipe(hw_vals, results, pipe);
intel_crtc->hw_ddb = cstate->wm.skl.ddb;
mutex_unlock(&dev_priv->wm.wm_mutex);
}