[PATCH 08/19] drm/i915: Add skl_wm_plane_disable_noatomic()

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Add skl_wm_plane_disable_noatomic() which will clear out all
the ddb and wm state for the plane. And let's do this _before_
we call plane->disable_arm() so that it'll actually clear out
the state in the hardware as well.

Currently this won't do anything new for most of the
intel_plane_disable_noatomic() calls since those are done before
wm readout, and thus everything wm/ddb related in the state
will still be zeroed anyway. The only difference will be for
skl_dbuf_sanitize() is happens after wm readout. But I'll be
reordering thigns so that wm readout happens earlier and at that
point this will guarantee that we still clear out the old
wm/ddb junk from the state.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c |  2 ++
 drivers/gpu/drm/i915/display/skl_watermark.c | 22 ++++++++++++++++++++
 drivers/gpu/drm/i915/display/skl_watermark.h |  2 ++
 3 files changed, 26 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 9756f52184c0..5a4953ba4d19 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -678,6 +678,8 @@ void intel_plane_disable_noatomic(struct intel_crtc *crtc,
 	intel_set_plane_visible(crtc_state, plane_state, false);
 	intel_plane_fixup_bitmasks(crtc_state);
 
+	skl_wm_plane_disable_noatomic(crtc, plane);
+
 	if ((crtc_state->active_planes & ~BIT(PLANE_CURSOR)) == 0 &&
 	    hsw_ips_disable(crtc_state)) {
 		crtc_state->ips_enabled = false;
diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c
index 9584d4da13d0..da7ffcfd9478 100644
--- a/drivers/gpu/drm/i915/display/skl_watermark.c
+++ b/drivers/gpu/drm/i915/display/skl_watermark.c
@@ -3867,6 +3867,28 @@ void skl_wm_crtc_disable_noatomic(struct intel_crtc *crtc)
 	memset(&crtc_state->wm.skl.ddb, 0, sizeof(crtc_state->wm.skl.ddb));
 }
 
+void skl_wm_plane_disable_noatomic(struct intel_crtc *crtc,
+				   struct intel_plane *plane)
+{
+	struct intel_display *display = to_intel_display(crtc);
+	struct intel_crtc_state *crtc_state =
+		to_intel_crtc_state(crtc->base.state);
+
+	if (DISPLAY_VER(display) < 9)
+		return;
+
+	skl_ddb_entry_init(&crtc_state->wm.skl.plane_ddb[plane->id], 0, 0);
+	skl_ddb_entry_init(&crtc_state->wm.skl.plane_ddb[plane->id], 0, 0);
+
+	crtc_state->wm.skl.plane_min_ddb[plane->id] = 0;
+	crtc_state->wm.skl.plane_interim_ddb[plane->id] = 0;
+
+	memset(&crtc_state->wm.skl.raw.planes[plane->id], 0,
+	       sizeof(crtc_state->wm.skl.raw.planes[plane->id]));
+	memset(&crtc_state->wm.skl.optimal.planes[plane->id], 0,
+	       sizeof(crtc_state->wm.skl.optimal.planes[plane->id]));
+}
+
 void intel_wm_state_verify(struct intel_atomic_state *state,
 			   struct intel_crtc *crtc)
 {
diff --git a/drivers/gpu/drm/i915/display/skl_watermark.h b/drivers/gpu/drm/i915/display/skl_watermark.h
index 8c07c11135c7..d9cff6c54310 100644
--- a/drivers/gpu/drm/i915/display/skl_watermark.h
+++ b/drivers/gpu/drm/i915/display/skl_watermark.h
@@ -42,6 +42,8 @@ void intel_wm_state_verify(struct intel_atomic_state *state,
 			   struct intel_crtc *crtc);
 
 void skl_wm_crtc_disable_noatomic(struct intel_crtc *crtc);
+void skl_wm_plane_disable_noatomic(struct intel_crtc *crtc,
+				   struct intel_plane *plane);
 
 void skl_watermark_ipc_init(struct drm_i915_private *i915);
 void skl_watermark_ipc_update(struct drm_i915_private *i915);
-- 
2.45.3