From 1b27fbdde1df172dba604855c45078d741f8c858 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Tue, 11 Jun 2019 16:51:43 -0400 Subject: drm: Add drm_atomic_get_(old|new)_connector_for_encoder() helpers Add functions to the atomic core to retrieve the old and new connectors associated with an encoder in a drm_atomic_state. This is useful for encoders and bridges that need to access the connector, for instance for the drm_display_info. The CRTC associated with the encoder can also be retrieved through the connector state, and from it, the old and new CRTC states. Changed in v4: - Added to the set Changed in v5: - Fix up docbook (Daniel & Laurent) Changed in v6: - Updated commit subject (Sam) Link to v4: https://patchwork.freedesktop.org/patch/msgid/20190508160920.144739-3-sean@poorly.run Link to v5: https://patchwork.freedesktop.org/patch/msgid/20190611160844.257498-3-sean@poorly.run Cc: Daniel Vetter Cc: Sam Ravnborg Tested-by: Heiko Stuebner Reviewed-by: Daniel Vetter Signed-off-by: Laurent Pinchart [seanpaul removed WARNs from helpers and added docs to explain why returning NULL might be valid] Signed-off-by: Sean Paul Link: https://patchwork.freedesktop.org/patch/msgid/20190611205147.181298-1-sean@poorly.run --- include/drm/drm_connector.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/drm/drm_connector.h') diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 47e749b74e5f..071143bc0ebd 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -518,6 +518,11 @@ struct drm_connector_state { * &drm_connector_helper_funcs.atomic_best_encoder or * &drm_connector_helper_funcs.best_encoder callbacks. * + * This is also used in the atomic helpers to map encoders to their + * current and previous connectors, see + * &drm_atomic_get_old_connector_for_encoder() and + * &drm_atomic_get_new_connector_for_encoder(). + * * NOTE: Atomic drivers must fill this out (either themselves or through * helpers), for otherwise the GETCONNECTOR and GETENCODER IOCTLs will * not return correct data to userspace. -- cgit v1.2.3