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drm/atomic: Add __drm_atomic_helper_connector_reset, v2.

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This is useful for drivers that subclass connector_state, like tegra.

Changes since v1:
- Docbook updates.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1451908400-25147-2-git-send-email-maarten.lankhorst@linux.intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Maarten Lankhorst 2016-01-04 12:53:16 +01:00 committed by Daniel Vetter
parent 5350a03124
commit 4cd39917dd
2 changed files with 28 additions and 4 deletions
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30
drivers/gpu/drm/drm_atomic_helper.c
View File

@ -2605,6 +2605,28 @@ void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
}
EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state);
/**
* __drm_atomic_helper_connector_reset - reset state on connector
* @connector: drm connector
* @conn_state: connector state to assign
*
* Initializes the newly allocated @conn_state and assigns it to
* #connector ->state, usually required when initializing the drivers
* or when called from the ->reset hook.
*
* This is useful for drivers that subclass the connector state.
*/
void
__drm_atomic_helper_connector_reset(struct drm_connector *connector,
struct drm_connector_state *conn_state)
{
if (conn_state)
conn_state->connector = connector;
connector->state = conn_state;
}
EXPORT_SYMBOL(__drm_atomic_helper_connector_reset);
/**
* drm_atomic_helper_connector_reset - default ->reset hook for connectors
* @connector: drm connector
@ -2615,11 +2637,11 @@ EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state);
*/
void drm_atomic_helper_connector_reset(struct drm_connector *connector)
{
kfree(connector->state);
connector->state = kzalloc(sizeof(*connector->state), GFP_KERNEL);
struct drm_connector_state *conn_state =
kzalloc(sizeof(*conn_state), GFP_KERNEL);
if (connector->state)
connector->state->connector = connector;
kfree(connector->state);
__drm_atomic_helper_connector_reset(connector, conn_state);
}
EXPORT_SYMBOL(drm_atomic_helper_connector_reset);

2
include/drm/drm_atomic_helper.h
View File

@ -126,6 +126,8 @@ void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
struct drm_plane_state *state);
void __drm_atomic_helper_connector_reset(struct drm_connector *connector,
struct drm_connector_state *conn_state);
void drm_atomic_helper_connector_reset(struct drm_connector *connector);
void
__drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,