From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Make the code more typo proof by extracting small helpers that
do the "do we have enough DDB for the WM level?" checks in
a consistent manner.
Cc: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_pm.c | 58 ++++++++++++++++++++-------------
1 file changed, 35 insertions(+), 23 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 38a6feced74f..3e26d8b667a1 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4782,6 +4782,36 @@ skl_plane_trans_wm(const struct skl_pipe_wm *pipe_wm,
return &wm->trans_wm;
}
+/*
+ * We only disable the watermarks for each plane if
+ * they exceed the ddb allocation of said plane. This
+ * is done so that we don't end up touching cursor
+ * watermarks needlessly when some other plane reduces
+ * our max possible watermark level.
+ *
+ * Bspec has this to say about the PLANE_WM enable bit:
+ * "All the watermarks at this level for all enabled
+ * planes must be enabled before the level will be used."
+ * So this is actually safe to do.
+ */
+static void
+skl_check_wm_level(struct skl_wm_level *wm, u64 total)
+{
+ if (wm->min_ddb_alloc > total)
+ memset(wm, 0, sizeof(*wm));
+}
+
+static void
+skl_check_nv12_wm_level(struct skl_wm_level *wm, struct skl_wm_level *uv_wm,
+ u64 total, u64 uv_total)
+{
+ if (wm->min_ddb_alloc > total ||
+ uv_wm->min_ddb_alloc > uv_total) {
+ memset(wm, 0, sizeof(*wm));
+ memset(uv_wm, 0, sizeof(*uv_wm));
+ }
+}
+
static int
skl_allocate_plane_ddb(struct intel_atomic_state *state,
struct intel_crtc *crtc)
@@ -4949,21 +4979,8 @@ skl_allocate_plane_ddb(struct intel_atomic_state *state,
struct skl_plane_wm *wm =
&crtc_state->wm.skl.optimal.planes[plane_id];
- /*
- * We only disable the watermarks for each plane if
- * they exceed the ddb allocation of said plane. This
- * is done so that we don't end up touching cursor
- * watermarks needlessly when some other plane reduces
- * our max possible watermark level.
- *
- * Bspec has this to say about the PLANE_WM enable bit:
- * "All the watermarks at this level for all enabled
- * planes must be enabled before the level will be used."
- * So this is actually safe to do.
- */
- if (wm->wm[level].min_ddb_alloc > total[plane_id] ||
- wm->uv_wm[level].min_ddb_alloc > uv_total[plane_id])
- memset(&wm->wm[level], 0, sizeof(wm->wm[level]));
+ skl_check_nv12_wm_level(&wm->wm[level], &wm->uv_wm[level],
+ total[plane_id], uv_total[plane_id]);
/*
* Wa_1408961008:icl, ehl
@@ -4986,14 +5003,9 @@ skl_allocate_plane_ddb(struct intel_atomic_state *state,
struct skl_plane_wm *wm =
&crtc_state->wm.skl.optimal.planes[plane_id];
- if (wm->trans_wm.min_ddb_alloc > total[plane_id])
- memset(&wm->trans_wm, 0, sizeof(wm->trans_wm));
-
- if (wm->sagv.wm0.min_ddb_alloc > total[plane_id])
- memset(&wm->sagv.wm0, 0, sizeof(wm->sagv.wm0));
-
- if (wm->sagv.trans_wm.min_ddb_alloc > total[plane_id])
- memset(&wm->sagv.trans_wm, 0, sizeof(wm->sagv.trans_wm));
+ skl_check_wm_level(&wm->trans_wm, total[plane_id]);
+ skl_check_wm_level(&wm->sagv.wm0, total[plane_id]);
+ skl_check_wm_level(&wm->sagv.trans_wm, total[plane_id]);
}
return 0;
--
2.26.2
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