... let's see how whether this catches anything earlier and I can
track down a few bugs.
v2: Add more checks and also add DRM_DEBUG_KMS output so that it's
clear which connector/encoder/crtc is being checked atm. Which proved
rather useful for debugging ...
v3: Add a WARN in the common encoder dpms function, now that also
modeset changes properly update the dpms state ...
v4: Properly add a short explanation for each WARN, to avoid the need
to correlate dmesg lines with source lines accurately. Suggested by
Chris Wilson.
v5: Also dump (expected, found) for state checks (or wherever it's not
apparent from the test what exactly mismatches with expectations).
Again suggested by Chris Wilson.
Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
drivers/gpu/drm/i915/intel_display.c | 90 +++++++++++++++++++++++++++++++++++-
1 file changed, 89 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 95a9f04..4db7b58 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3637,7 +3637,7 @@ void intel_connector_dpms(struct drm_connector *connector, int mode)
if (encoder->base.crtc)
intel_encoder_dpms(encoder, mode);
else
- encoder->connectors_active = false;
+ WARN_ON(encoder->connectors_active != false);
intel_connector_check_state(to_intel_connector(connector));
}
@@ -6823,6 +6823,90 @@ static bool intel_crtc_in_use(struct drm_crtc *crtc)
base.head) \
if (mask & (1 <<(intel_crtc)->pipe)) \
+static void
+intel_modeset_check_state(struct drm_device *dev)
+{
+ struct intel_crtc *crtc;
+ struct intel_encoder *encoder;
+ struct intel_connector *connector;
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list,
+ base.head) {
+ /* This also checks the encoder/connector hw state with the
+ * ->get_hw_state callbacks. */
+ intel_connector_check_state(connector);
+
+ WARN(&connector->new_encoder->base != connector->base.encoder,
+ "connector's staged encoder doesn't match current encoder\n");
+ }
+
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list,
+ base.head) {
+ bool enabled = false;
+ bool active = false;
+ enum pipe pipe;
+
+ DRM_DEBUG_KMS("[ENCODER:%d:%s]\n",
+ encoder->base.base.id,
+ drm_get_encoder_name(&encoder->base));
+
+ WARN(&encoder->new_crtc->base != encoder->base.crtc,
+ "encoder's stage crtc doesn't match current crtc\n");
+ WARN(encoder->connectors_active && !encoder->base.crtc,
+ "encoder's active_connectors set, but no crtc\n");
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list,
+ base.head) {
+ if (connector->base.encoder != &encoder->base)
+ continue;
+ enabled = true;
+ if (connector->base.dpms == DRM_MODE_DPMS_ON)
+ active = true;
+ }
+ WARN(!!encoder->base.crtc != enabled,
+ "encoder's enabled state mismatch "
+ "(expected %i, found %i)\n",
+ !!encoder->base.crtc, enabled);
+ /* dpms on only implies active. */
+ WARN(active && !encoder->base.crtc,
+ "active encoder with no crtc\n");
+ WARN(enabled = encoder->get_hw_state(encoder, &pipe)
+ && !encoder->base.crtc,
+ "encoder's hw state doesn't match sw tracking "
+ "(expected %i, found %i)\n",
+ !!encoder->base.crtc, enabled);
+ }
+
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list,
+ base.head) {
+ bool enabled = false;
+ bool active = false;
+
+ DRM_DEBUG_KMS("[CRTC:%d]\n",
+ crtc->base.base.id);
+
+ WARN(crtc->active && !crtc->base.enabled,
+ "active crtc, but not enabled in sw tracking\n");
+
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list,
+ base.head) {
+ if (encoder->base.crtc != &crtc->base)
+ continue;
+ enabled = true;
+ if (encoder->connectors_active)
+ active = true;
+ }
+ WARN(active != crtc->active,
+ "crtc's computed active state doesn't match tracked active state "
+ "(expected %i, found %i)\n", active, crtc->active);
+ WARN(enabled != crtc->base.enabled,
+ "crtc's computed enabled state doesn't match tracked enabled state "
+ "(expected %i, found %i)\n", enabled, crtc->base.enabled);
+
+ assert_pipe(dev->dev_private, crtc->pipe, crtc->active);
+ }
+}
+
bool intel_set_mode(struct drm_crtc *crtc,
struct drm_display_mode *mode,
int x, int y, struct drm_framebuffer *fb)
@@ -6947,6 +7031,8 @@ done:
crtc->mode = saved_mode;
}
+ intel_modeset_check_state(dev);
+
return ret;
}
@@ -8142,6 +8228,8 @@ void intel_modeset_setup_hw_state(struct drm_device *dev)
}
intel_modeset_update_staged_output_state(dev);
+
+ intel_modeset_check_state(dev);
}
void intel_modeset_gem_init(struct drm_device *dev)
--
1.7.11.2
