drm/i915: add pipe asserts for the crtc enable sequence
The i9xx modeset sequence is currently pretty fishy, so tight it all
up with some good assert-sprinkling.
We already have good coverage on the disable side, but the enable side
is spotty (since until recently it was wrong).
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 5a904dd..62fd5ea 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1474,6 +1474,8 @@
int reg;
u32 val;
+ assert_pipe_disabled(dev_priv, pipe);
+
/* No really, not for ILK+ */
BUG_ON(!IS_VALLEYVIEW(dev_priv->dev) && dev_priv->info->gen >= 5);
@@ -1835,6 +1837,9 @@
int reg;
u32 val;
+ assert_planes_disabled(dev_priv, pipe);
+ assert_sprites_disabled(dev_priv, pipe);
+
if (HAS_PCH_LPT(dev_priv->dev))
pch_transcoder = TRANSCODER_A;
else