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drm/display/dp_mst: Add drm_atomic_get_old_mst_topology_state()

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Add a function to get the old MST topology state, required by a
follow-up i915 patch.

While at it clarify the code comment of
drm_atomic_get_new_mst_topology_state() and add _new prefix
to the new state pointer to remind about its difference from the old
state.

v2: Use old_/new_ prefixes for the state pointers. (Ville)

Cc: Lyude Paul <lyude@redhat.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: stable@vger.kernel.org # 6.1
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Acked-by: Lyude Paul <lyude@redhat.com>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230206114856.2665066-3-imre.deak@intel.com
This commit is contained in:
Imre Deak 2023-02-06 13:48:55 +02:00
parent e761cc2094
commit 9ffdb67af0
2 changed files with 33 additions and 5 deletions
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35
drivers/gpu/drm/display/drm_dp_mst_topology.c
View File

@ -5365,27 +5365,52 @@ struct drm_dp_mst_topology_state *drm_atomic_get_mst_topology_state(struct drm_a
EXPORT_SYMBOL(drm_atomic_get_mst_topology_state);
/**
* drm_atomic_get_new_mst_topology_state: get new MST topology state in atomic state, if any
* drm_atomic_get_old_mst_topology_state: get old MST topology state in atomic state, if any
* @state: global atomic state
* @mgr: MST topology manager, also the private object in this case
*
* This function wraps drm_atomic_get_priv_obj_state() passing in the MST atomic
* This function wraps drm_atomic_get_old_private_obj_state() passing in the MST atomic
* state vtable so that the private object state returned is that of a MST
* topology object.
*
* Returns:
*
* The MST topology state, or NULL if there's no topology state for this MST mgr
* The old MST topology state, or NULL if there's no topology state for this MST mgr
* in the global atomic state
*/
struct drm_dp_mst_topology_state *
drm_atomic_get_old_mst_topology_state(struct drm_atomic_state *state,
struct drm_dp_mst_topology_mgr *mgr)
{
struct drm_private_state *old_priv_state =
drm_atomic_get_old_private_obj_state(state, &mgr->base);
return old_priv_state ? to_dp_mst_topology_state(old_priv_state) : NULL;
}
EXPORT_SYMBOL(drm_atomic_get_old_mst_topology_state);
/**
* drm_atomic_get_new_mst_topology_state: get new MST topology state in atomic state, if any
* @state: global atomic state
* @mgr: MST topology manager, also the private object in this case
*
* This function wraps drm_atomic_get_new_private_obj_state() passing in the MST atomic
* state vtable so that the private object state returned is that of a MST
* topology object.
*
* Returns:
*
* The new MST topology state, or NULL if there's no topology state for this MST mgr
* in the global atomic state
*/
struct drm_dp_mst_topology_state *
drm_atomic_get_new_mst_topology_state(struct drm_atomic_state *state,
struct drm_dp_mst_topology_mgr *mgr)
{
struct drm_private_state *priv_state =
struct drm_private_state *new_priv_state =
drm_atomic_get_new_private_obj_state(state, &mgr->base);
return priv_state ? to_dp_mst_topology_state(priv_state) : NULL;
return new_priv_state ? to_dp_mst_topology_state(new_priv_state) : NULL;
}
EXPORT_SYMBOL(drm_atomic_get_new_mst_topology_state);

3
include/drm/display/drm_dp_mst_helper.h
View File

@ -868,6 +868,9 @@ struct drm_dp_mst_topology_state *
drm_atomic_get_mst_topology_state(struct drm_atomic_state *state,
struct drm_dp_mst_topology_mgr *mgr);
struct drm_dp_mst_topology_state *
drm_atomic_get_old_mst_topology_state(struct drm_atomic_state *state,
struct drm_dp_mst_topology_mgr *mgr);
struct drm_dp_mst_topology_state *
drm_atomic_get_new_mst_topology_state(struct drm_atomic_state *state,
struct drm_dp_mst_topology_mgr *mgr);
struct drm_dp_mst_atomic_payload *