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drm/bridge: Add a drm_bridge_state object

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One of the last remaining objects to not have its atomic state.

This is being motivated by our attempt to support runtime bus-format
negotiation between elements of the bridge chain.
This patch just paves the road for such a feature by adding a new
drm_bridge_state object inheriting from drm_private_obj so we can
re-use some of the existing state initialization/tracking logic.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed by: Jernej Skrabec <jernej.skrabec@siol.net>
Tested-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106143409.32321-2-narmstrong@baylibre.com
This commit is contained in:
Boris Brezillon
2020-01-06 15:34:06 +01:00
committed by Neil Armstrong
parent 02da7c3d79
commit 6ed7e9625f
5 changed files with 309 additions and 6 deletions
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20
drivers/gpu/drm/drm_atomic_helper.c
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@@ -730,6 +730,26 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
return ret;
}
/*
* Iterate over all connectors again, and add all affected bridges to
* the state.
*/
for_each_oldnew_connector_in_state(state, connector,
old_connector_state,
new_connector_state, i) {
struct drm_encoder *encoder;
encoder = old_connector_state->best_encoder;
ret = drm_atomic_add_encoder_bridges(state, encoder);
if (ret)
return ret;
encoder = new_connector_state->best_encoder;
ret = drm_atomic_add_encoder_bridges(state, encoder);
if (ret)
return ret;
}
ret = mode_valid(state);
if (ret)
return ret;