drm/i915: Add pipe ddb entries into the dbuf state
The dbuf state will be where we collect all the inter-pipe dbuf
allocation stuff. Start by adding the actual per-pipe ddb entries
there.
Originally the plan was to move them there outright, but that no longer
works as we're no longer guaranteed to have a dbuf state when it comes
time to sanity check the ddb overlaps in skl_commit_modeset_enables().
I think when I wrote this originally we did the watermark/ddb
calculation last, and so we couldn't have any crtcs in the state w/o
also having the dbuf state. But that has since changed and we do the
watermark/ddb calculation much earlier, and thus it is now possible
to commit crtcs w/o a dbuf state. So we keep another copy of the
information in the crtc state.
v2: Rebase
v3: Duplicate the entries instead of moving
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210122205633.18492-6-ville.syrjala@linux.intel.com
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index b88429b..e69258b 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4105,7 +4105,7 @@ static u8 skl_compute_dbuf_slices(struct intel_crtc *crtc,
static int
skl_ddb_get_pipe_allocation_limits(struct drm_i915_private *dev_priv,
- const struct intel_crtc_state *crtc_state,
+ struct intel_crtc_state *crtc_state,
const u64 total_data_rate,
struct skl_ddb_entry *alloc, /* out */
int *num_active /* out */)
@@ -4134,6 +4134,7 @@ skl_ddb_get_pipe_allocation_limits(struct drm_i915_private *dev_priv,
if (!crtc_state->hw.active) {
alloc->start = 0;
alloc->end = 0;
+ crtc_state->wm.skl.ddb = *alloc;
return 0;
}
@@ -4146,16 +4147,8 @@ skl_ddb_get_pipe_allocation_limits(struct drm_i915_private *dev_priv,
* grab _all_ crtc locks, including the one we currently hold.
*/
if (old_dbuf_state->active_pipes == new_dbuf_state->active_pipes &&
- !dev_priv->wm.distrust_bios_wm) {
- /*
- * alloc may be cleared by clear_intel_crtc_state,
- * copy from old state to be sure
- *
- * FIXME get rid of this mess
- */
- *alloc = to_intel_crtc_state(for_crtc->base.state)->wm.skl.ddb;
+ !dev_priv->wm.distrust_bios_wm)
return 0;
- }
/*
* Get allowed DBuf slices for correspondent pipe and platform.
@@ -4222,6 +4215,7 @@ skl_ddb_get_pipe_allocation_limits(struct drm_i915_private *dev_priv,
alloc->start = ddb_slices.start + start;
alloc->end = ddb_slices.start + end;
+ crtc_state->wm.skl.ddb = *alloc;
drm_dbg_kms(&dev_priv->drm,
"[CRTC:%d:%s] dbuf slices 0x%x, ddb (%d - %d), active pipes 0x%x\n",
@@ -4798,7 +4792,9 @@ skl_allocate_pipe_ddb(struct intel_atomic_state *state,
struct intel_crtc_state *crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- struct skl_ddb_entry *alloc = &crtc_state->wm.skl.ddb;
+ struct intel_dbuf_state *dbuf_state =
+ intel_atomic_get_new_dbuf_state(state);
+ struct skl_ddb_entry *alloc = &dbuf_state->ddb[crtc->pipe];
u16 alloc_size, start = 0;
u16 total[I915_MAX_PLANES] = {};
u16 uv_total[I915_MAX_PLANES] = {};
@@ -4839,6 +4835,7 @@ skl_allocate_pipe_ddb(struct intel_atomic_state *state,
}
alloc->start = alloc->end = 0;
+ crtc_state->wm.skl.ddb = *alloc;
return 0;
}