From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Currently we're only dumping out the ddb allocation changes, let's do
the same for the watermarks. This should help with debugging underruns
and whatnot.
First I tried one line per plane per wm level, but that resulted in
an obnoxious amount of lines printed. So as a compromise I settled
on a four line format, each line containing a single watermark related
value (enable,lines,blocks,min_ddb_alloc) for all 8 levels (+trans wm).
It still produces quite a lot of output but I can't really see a way
around that because we simply have a lot of data to dump.
Let's also pimp the ddb debug to print the size of the allocations
too, not just their bounds. Makes it a bit easier to compare against
the watermarks.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_pm.c | 86 +++++++++++++++++++++++++++++++--
1 file changed, 83 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 54307f1df6cf..454581b044ad 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5269,6 +5269,11 @@ skl_compute_ddb(struct intel_atomic_state *state)
return 0;
}
+static char enast(bool enable)
+{
+ return enable ? '*' : ' ';
+}
+
static void
skl_print_wm_changes(struct intel_atomic_state *state)
{
@@ -5279,8 +5284,16 @@ skl_print_wm_changes(struct intel_atomic_state *state)
struct intel_crtc *crtc;
int i;
+ if ((drm_debug & DRM_UT_KMS) == 0)
+ return;
+
for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
new_crtc_state, i) {
+ const struct skl_pipe_wm *old_pipe_wm, *new_pipe_wm;
+
+ old_pipe_wm = &old_crtc_state->wm.skl.optimal;
+ new_pipe_wm = &new_crtc_state->wm.skl.optimal;
+
for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) {
enum plane_id plane_id = plane->id;
const struct skl_ddb_entry *old, *new;
@@ -5291,10 +5304,77 @@ skl_print_wm_changes(struct intel_atomic_state *state)
if (skl_ddb_entry_equal(old, new))
continue;
- DRM_DEBUG_KMS("[PLANE:%d:%s] ddb (%d - %d) -> (%d - %d)\n",
+ DRM_DEBUG_KMS("[PLANE:%d:%s] ddb (%4d - %4d) -> (%4d - %4d), size %4d -> %4d\n",
+ plane->base.base.id, plane->base.name,
+ old->start, old->end, new->start, new->end,
+ skl_ddb_entry_size(old), skl_ddb_entry_size(new));
+ }
+
+ for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) {
+ enum plane_id plane_id = plane->id;
+ const struct skl_plane_wm *old_wm, *new_wm;
+
+ old_wm = &old_pipe_wm->planes[plane_id];
+ new_wm = &new_pipe_wm->planes[plane_id];
+
+ if (skl_plane_wm_equals(dev_priv, old_wm, new_wm))
+ continue;
+
+ DRM_DEBUG_KMS("[PLANE:%d:%s] level %cwm0,%cwm1,%cwm2,%cwm3,%cwm4,%cwm5,%cwm6,%cwm7,%ctwm"
+ " -> %cwm0,%cwm1,%cwm2,%cwm3,%cwm4,%cwm5,%cwm6,%cwm7,%ctwm\n",
+ plane->base.base.id, plane->base.name,
+ enast(old_wm->wm[0].plane_en), enast(old_wm->wm[1].plane_en),
+ enast(old_wm->wm[2].plane_en), enast(old_wm->wm[3].plane_en),
+ enast(old_wm->wm[4].plane_en), enast(old_wm->wm[5].plane_en),
+ enast(old_wm->wm[6].plane_en), enast(old_wm->wm[7].plane_en),
+ enast(old_wm->trans_wm.plane_en),
+ enast(new_wm->wm[0].plane_en), enast(new_wm->wm[1].plane_en),
+ enast(new_wm->wm[2].plane_en), enast(new_wm->wm[3].plane_en),
+ enast(new_wm->wm[4].plane_en), enast(new_wm->wm[5].plane_en),
+ enast(new_wm->wm[6].plane_en), enast(new_wm->wm[7].plane_en),
+ enast(new_wm->trans_wm.plane_en));
+
+ DRM_DEBUG_KMS("[PLANE:%d:%s] lines %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d"
+ " -> %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d\n",
+ plane->base.base.id, plane->base.name,
+ old_wm->wm[0].plane_res_l, old_wm->wm[1].plane_res_l,
+ old_wm->wm[2].plane_res_l, old_wm->wm[3].plane_res_l,
+ old_wm->wm[4].plane_res_l, old_wm->wm[5].plane_res_l,
+ old_wm->wm[6].plane_res_l, old_wm->wm[7].plane_res_l,
+ old_wm->trans_wm.plane_res_l,
+ new_wm->wm[0].plane_res_l, new_wm->wm[1].plane_res_l,
+ new_wm->wm[2].plane_res_l, new_wm->wm[3].plane_res_l,
+ new_wm->wm[4].plane_res_l, new_wm->wm[5].plane_res_l,
+ new_wm->wm[6].plane_res_l, new_wm->wm[7].plane_res_l,
+ new_wm->trans_wm.plane_res_l);
+
+ DRM_DEBUG_KMS("[PLANE:%d:%s] blocks %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d"
+ " -> %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d\n",
+ plane->base.base.id, plane->base.name,
+ old_wm->wm[0].plane_res_b, old_wm->wm[1].plane_res_b,
+ old_wm->wm[2].plane_res_b, old_wm->wm[3].plane_res_b,
+ old_wm->wm[4].plane_res_b, old_wm->wm[5].plane_res_b,
+ old_wm->wm[6].plane_res_b, old_wm->wm[7].plane_res_b,
+ old_wm->trans_wm.plane_res_b,
+ new_wm->wm[0].plane_res_b, new_wm->wm[1].plane_res_b,
+ new_wm->wm[2].plane_res_b, new_wm->wm[3].plane_res_b,
+ new_wm->wm[4].plane_res_b, new_wm->wm[5].plane_res_b,
+ new_wm->wm[6].plane_res_b, new_wm->wm[7].plane_res_b,
+ new_wm->trans_wm.plane_res_b);
+
+ DRM_DEBUG_KMS("[PLANE:%d:%s] min_ddb %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d"
+ " -> %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d\n",
plane->base.base.id, plane->base.name,
- old->start, old->end,
- new->start, new->end);
+ old_wm->wm[0].min_ddb_alloc, old_wm->wm[1].min_ddb_alloc,
+ old_wm->wm[2].min_ddb_alloc, old_wm->wm[3].min_ddb_alloc,
+ old_wm->wm[4].min_ddb_alloc, old_wm->wm[5].min_ddb_alloc,
+ old_wm->wm[6].min_ddb_alloc, old_wm->wm[7].min_ddb_alloc,
+ old_wm->trans_wm.min_ddb_alloc,
+ new_wm->wm[0].min_ddb_alloc, new_wm->wm[1].min_ddb_alloc,
+ new_wm->wm[2].min_ddb_alloc, new_wm->wm[3].min_ddb_alloc,
+ new_wm->wm[4].min_ddb_alloc, new_wm->wm[5].min_ddb_alloc,
+ new_wm->wm[6].min_ddb_alloc, new_wm->wm[7].min_ddb_alloc,
+ new_wm->trans_wm.min_ddb_alloc);
}
}
}
--
2.19.2
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