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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>
This commit is contained in:
Daniel Vetter 2012-07-10 09:50:11 +02:00
parent 9dc10f37e3
commit 8af6cf88a5
1 changed files with 103 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

104
drivers/gpu/drm/i915/intel_display.c
View File

@ -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));
}
@ -6872,6 +6872,104 @@ intel_modeset_update_state(struct drm_device *dev, unsigned prepare_pipes)
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, tracked_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_OFF)
active = true;
}
WARN(!!encoder->base.crtc != enabled,
"encoder's enabled state mismatch "
"(expected %i, found %i)\n",
!!encoder->base.crtc, enabled);
WARN(active && !encoder->base.crtc,
"active encoder with no crtc\n");
WARN(encoder->connectors_active != active,
"encoder's computed active state doesn't match tracked active state "
"(expected %i, found %i)\n", active, encoder->connectors_active);
active = encoder->get_hw_state(encoder, &pipe);
WARN(active != encoder->connectors_active,
"encoder's hw state doesn't match sw tracking "
"(expected %i, found %i)\n",
encoder->connectors_active, active);
if (!encoder->base.crtc)
continue;
tracked_pipe = to_intel_crtc(encoder->base.crtc)->pipe;
WARN(active && pipe != tracked_pipe,
"active encoder's pipe doesn't match"
"(expected %i, found %i)\n",
tracked_pipe, pipe);
}
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)
@ -6969,6 +7067,8 @@ done:
if (!ret && crtc->enabled) {
crtc->hwmode = saved_hwmode;
crtc->mode = saved_mode;
} else {
intel_modeset_check_state(dev);
}
return ret;
@ -8147,6 +8247,8 @@ 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)