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drm/i915: add tons of modeset state checks
... let's see 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. v6: Due to an issue reported by Paulo Zanoni I've noticed that the encoder checking is by far not as strict as it could and should be. Improve this. Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ -3637,7 +3637,7 @@ void intel_connector_dpms(struct drm_connector *connector, int mode)
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if (encoder->base.crtc)
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intel_encoder_dpms(encoder, mode);
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else
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encoder->connectors_active = false;
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WARN_ON(encoder->connectors_active != false);
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intel_connector_check_state(to_intel_connector(connector));
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}
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@ -6872,6 +6872,104 @@ intel_modeset_update_state(struct drm_device *dev, unsigned prepare_pipes)
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base.head) \
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if (mask & (1 <<(intel_crtc)->pipe)) \
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static void
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intel_modeset_check_state(struct drm_device *dev)
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{
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struct intel_crtc *crtc;
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struct intel_encoder *encoder;
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struct intel_connector *connector;
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list_for_each_entry(connector, &dev->mode_config.connector_list,
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base.head) {
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/* This also checks the encoder/connector hw state with the
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* ->get_hw_state callbacks. */
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intel_connector_check_state(connector);
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WARN(&connector->new_encoder->base != connector->base.encoder,
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"connector's staged encoder doesn't match current encoder\n");
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}
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list_for_each_entry(encoder, &dev->mode_config.encoder_list,
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base.head) {
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bool enabled = false;
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bool active = false;
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enum pipe pipe, tracked_pipe;
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DRM_DEBUG_KMS("[ENCODER:%d:%s]\n",
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encoder->base.base.id,
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drm_get_encoder_name(&encoder->base));
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WARN(&encoder->new_crtc->base != encoder->base.crtc,
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"encoder's stage crtc doesn't match current crtc\n");
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WARN(encoder->connectors_active && !encoder->base.crtc,
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"encoder's active_connectors set, but no crtc\n");
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list_for_each_entry(connector, &dev->mode_config.connector_list,
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base.head) {
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if (connector->base.encoder != &encoder->base)
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continue;
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enabled = true;
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if (connector->base.dpms != DRM_MODE_DPMS_OFF)
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active = true;
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}
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WARN(!!encoder->base.crtc != enabled,
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"encoder's enabled state mismatch "
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"(expected %i, found %i)\n",
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!!encoder->base.crtc, enabled);
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WARN(active && !encoder->base.crtc,
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"active encoder with no crtc\n");
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WARN(encoder->connectors_active != active,
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"encoder's computed active state doesn't match tracked active state "
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"(expected %i, found %i)\n", active, encoder->connectors_active);
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active = encoder->get_hw_state(encoder, &pipe);
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WARN(active != encoder->connectors_active,
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"encoder's hw state doesn't match sw tracking "
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"(expected %i, found %i)\n",
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encoder->connectors_active, active);
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if (!encoder->base.crtc)
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continue;
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tracked_pipe = to_intel_crtc(encoder->base.crtc)->pipe;
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WARN(active && pipe != tracked_pipe,
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"active encoder's pipe doesn't match"
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"(expected %i, found %i)\n",
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tracked_pipe, pipe);
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}
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list_for_each_entry(crtc, &dev->mode_config.crtc_list,
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base.head) {
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bool enabled = false;
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bool active = false;
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DRM_DEBUG_KMS("[CRTC:%d]\n",
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crtc->base.base.id);
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WARN(crtc->active && !crtc->base.enabled,
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"active crtc, but not enabled in sw tracking\n");
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list_for_each_entry(encoder, &dev->mode_config.encoder_list,
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base.head) {
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if (encoder->base.crtc != &crtc->base)
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continue;
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enabled = true;
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if (encoder->connectors_active)
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active = true;
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}
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WARN(active != crtc->active,
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"crtc's computed active state doesn't match tracked active state "
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"(expected %i, found %i)\n", active, crtc->active);
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WARN(enabled != crtc->base.enabled,
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"crtc's computed enabled state doesn't match tracked enabled state "
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"(expected %i, found %i)\n", enabled, crtc->base.enabled);
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assert_pipe(dev->dev_private, crtc->pipe, crtc->active);
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}
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}
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bool intel_set_mode(struct drm_crtc *crtc,
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struct drm_display_mode *mode,
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int x, int y, struct drm_framebuffer *fb)
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@ -6969,6 +7067,8 @@ bool intel_set_mode(struct drm_crtc *crtc,
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if (!ret && crtc->enabled) {
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crtc->hwmode = saved_hwmode;
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crtc->mode = saved_mode;
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} else {
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intel_modeset_check_state(dev);
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}
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return ret;
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@ -8147,6 +8247,8 @@ void intel_modeset_setup_hw_state(struct drm_device *dev)
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}
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intel_modeset_update_staged_output_state(dev);
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intel_modeset_check_state(dev);
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}
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void intel_modeset_gem_init(struct drm_device *dev)
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