On Mon, Jan 04, 2016 at 12:53:18PM +0100, Maarten Lankhorst wrote:
> It can be useful to iterate over connectors without grabbing
> connection_mutex. It can also be used to see how many connectors
> are on a crtc without iterating over the list.
>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Merged up to this patch here, thanks.
-Daniel
> ---
> drivers/gpu/drm/drm_atomic.c | 11 +++++++++++
> include/drm/drm_crtc.h | 3 +++
> 2 files changed, 14 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index 6a21e5c378c1..14b321580517 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -1063,10 +1063,21 @@ drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
> {
> struct drm_crtc_state *crtc_state;
>
> + if (conn_state->crtc && conn_state->crtc != crtc) {
> + crtc_state = drm_atomic_get_existing_crtc_state(conn_state->state,
> + conn_state->crtc);
> +
> + crtc_state->connector_mask &=
> + ~(1 << drm_connector_index(conn_state->connector));
> + }
> +
> if (crtc) {
> crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
> if (IS_ERR(crtc_state))
> return PTR_ERR(crtc_state);
> +
> + crtc_state->connector_mask |=
> + 1 << drm_connector_index(conn_state->connector);
> }
>
> conn_state->crtc = crtc;
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index c2f98ba2bb98..dd0db4ceab26 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -301,6 +301,7 @@ struct drm_plane_helper_funcs;
> * @active_changed: crtc_state->active has been toggled.
> * @connectors_changed: connectors to this crtc have been updated
> * @plane_mask: bitmask of (1 << drm_plane_index(plane)) of attached planes
> + * @connector_mask: bitmask of (1 << drm_connector_index(connector)) of attached connectors
> * @last_vblank_count: for helpers and drivers to capture the vblank of the
> * update to ensure framebuffer cleanup isn't done too early
> * @adjusted_mode: for use by helpers and drivers to compute adjusted mode timings
> @@ -334,6 +335,8 @@ struct drm_crtc_state {
> */
> u32 plane_mask;
>
> + u32 connector_mask;
> +
> /* last_vblank_count: for vblank waits before cleanup */
> u32 last_vblank_count;
>
> --
> 2.1.0
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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