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drm/atomic: Add encoder_mask to crtc_state, v3.

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This allows iteration over encoders without requiring connection_mutex.

Changes since v1:
- Add a set_best_encoder helper function and update encoder_mask inside
  it.
Changes since v2:
- Relax the WARN_ON(!crtc), with explanation.
- Call set_best_encoder when connector is moved between crtc's.
- Add some paranoia to steal_encoder to prevent accidentally setting
  best_encoder to NULL.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/56AA200A.6070501@linux.intel.com
This commit is contained in:
Maarten Lankhorst
2016-01-28 15:04:58 +01:00
committed by Daniel Vetter
parent 97a8df9087
commit e87a52b389
3 changed files with 55 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
drivers/gpu/drm/drm_atomic_helper.c
View File

@@ -125,6 +125,47 @@ get_current_crtc_for_encoder(struct drm_device *dev,
return NULL;
}
static void
set_best_encoder(struct drm_atomic_state *state,
struct drm_connector_state *conn_state,
struct drm_encoder *encoder)
{
struct drm_crtc_state *crtc_state;
struct drm_crtc *crtc;
if (conn_state->best_encoder) {
/* Unset the encoder_mask in the old crtc state. */
crtc = conn_state->connector->state->crtc;
/* A NULL crtc is an error here because we should have
* duplicated a NULL best_encoder when crtc was NULL.
* As an exception restoring duplicated atomic state
* during resume is allowed, so don't warn when
* best_encoder is equal to encoder we intend to set.
*/
WARN_ON(!crtc && encoder != conn_state->best_encoder);
if (crtc) {
crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
crtc_state->encoder_mask &=
~(1 << drm_encoder_index(conn_state->best_encoder));
}
}
if (encoder) {
crtc = conn_state->crtc;
WARN_ON(!crtc);
if (crtc) {
crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
crtc_state->encoder_mask |=
1 << drm_encoder_index(encoder);
}
}
conn_state->best_encoder = encoder;
}
static int
steal_encoder(struct drm_atomic_state *state,
struct drm_encoder *encoder,
@@ -164,7 +205,10 @@ steal_encoder(struct drm_atomic_state *state,
if (IS_ERR(connector_state))
return PTR_ERR(connector_state);
connector_state->best_encoder = NULL;
if (connector_state->best_encoder != encoder)
continue;
set_best_encoder(state, connector_state, NULL);
}
return 0;
@@ -212,7 +256,7 @@ update_connector_routing(struct drm_atomic_state *state, int conn_idx)
connector->base.id,
connector->name);
connector_state->best_encoder = NULL;
set_best_encoder(state, connector_state, NULL);
return 0;
}
@@ -241,6 +285,8 @@ update_connector_routing(struct drm_atomic_state *state, int conn_idx)
}
if (new_encoder == connector_state->best_encoder) {
set_best_encoder(state, connector_state, new_encoder);
DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n",
connector->base.id,
connector->name,
@@ -275,7 +321,8 @@ update_connector_routing(struct drm_atomic_state *state, int conn_idx)
if (WARN_ON(!connector_state->crtc))
return -EINVAL;
connector_state->best_encoder = new_encoder;
set_best_encoder(state, connector_state, new_encoder);
idx = drm_crtc_index(connector_state->crtc);
crtc_state = state->crtc_states[idx];