[PATCH v1.2 02/13] drm/atomic: Update legacy DPMS state during modesets, v3.

Maarten Lankhorst
2015-07-27T11:24:29Z

This is required for DPMS to work correctly, during a modeset
the DPMS property should be turned off, unless the state is
crtc is made active in which case it should be set to DPMS on.

Changes since v1:
- Set DPMS to off when a connector is removed from a crtc too.
- Update the legacy dpms property too.
- Add an exception for the legacy dpms paths, it updates its own state.
Changes since v2:
- Do not preserve dpms property.

Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 57847ae8ce8c..0b475fae067d 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -660,15 +660,29 @@ drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
struct drm_crtc_state *old_crtc_state;
int i;

- /* clear out existing links */
+ /* clear out existing links and update dpms */
for_each_connector_in_state(old_state, connector, old_conn_state, i) {
- if (!connector->encoder)
- continue;
+ if (connector->encoder) {
+ WARN_ON(!connector->encoder->crtc);
+
+ connector->encoder->crtc = NULL;
+ connector->encoder = NULL;
+ }

- WARN_ON(!connector->encoder->crtc);
+ crtc = connector->state->crtc;
+ if ((!crtc && old_conn_state->crtc) ||
+ (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) {
+ struct drm_property *dpms_prop =
+ dev->mode_config.dpms_property;
+ int mode = DRM_MODE_DPMS_OFF;

- connector->encoder->crtc = NULL;
- connector->encoder = NULL;
+ if (crtc && crtc->state->active)
+ mode = DRM_MODE_DPMS_ON;
+
+ connector->dpms = mode;
+ drm_object_property_set_value(&connector->base,
+ dpms_prop, mode);
+ }
}

/* set new links */
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 13a6608be689..43b0f17ad1fa 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12349,16 +12349,9 @@ intel_modeset_update_state(struct drm_atomic_state *state)
continue;

if (crtc->state->active) {
- struct drm_property *dpms_property =
- dev->mode_config.dpms_property;
-
- connector->dpms = DRM_MODE_DPMS_ON;
- drm_object_property_set_value(&connector->base, dpms_property, DRM_MODE_DPMS_ON);
-
intel_encoder = to_intel_encoder(connector->encoder);
intel_encoder->connectors_active = true;
- } else
- connector->dpms = DRM_MODE_DPMS_OFF;
+ }
}
}

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