From 8de679abc8ae81463d3fec495a21a6ca0a65bade Mon Sep 17 00:00:00 2001 From: Boris Brezillon Date: Tue, 7 Jan 2020 19:58:05 +0100 Subject: [PATCH] Revert "drm/bridge: Add an ->atomic_check() hook" This reverts commit b86d895524ab ("drm/bridge: Add an ->atomic_check() hook"). Commit 6ed7e9625fa6 ("drm/bridge: Add a drm_bridge_state object") introduced a circular dependency between drm.ko and drm_kms_helper.ko which uncovered a misdesign in how the whole thing was implemented. Let's revert all patches depending on the bridge_state infrastructure for now. Signed-off-by: Boris Brezillon Acked-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/20200107185807.606999-4-boris.brezillon@collabora.com --- drivers/gpu/drm/drm_atomic_helper.c | 12 +++---- drivers/gpu/drm/drm_bridge.c | 62 ------------------------------------- include/drm/drm_bridge.h | 29 +---------------- 3 files changed, 7 insertions(+), 96 deletions(-) diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index afe14f72..ad8eae9 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -437,12 +437,12 @@ mode_fixup(struct drm_atomic_state *state) funcs = encoder->helper_private; bridge = drm_bridge_chain_get_first_bridge(encoder); - ret = drm_atomic_bridge_chain_check(bridge, - new_crtc_state, - new_conn_state); - if (ret) { - DRM_DEBUG_ATOMIC("Bridge atomic check failed\n"); - return ret; + ret = drm_bridge_chain_mode_fixup(bridge, + &new_crtc_state->mode, + &new_crtc_state->adjusted_mode); + if (!ret) { + DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); + return -EINVAL; } if (funcs && funcs->atomic_check) { diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index 8e4b799..872e159 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -645,68 +645,6 @@ void drm_atomic_bridge_chain_enable(struct drm_bridge *bridge, } EXPORT_SYMBOL(drm_atomic_bridge_chain_enable); -static int drm_atomic_bridge_check(struct drm_bridge *bridge, - struct drm_crtc_state *crtc_state, - struct drm_connector_state *conn_state) -{ - if (bridge->funcs->atomic_check) { - struct drm_bridge_state *bridge_state; - int ret; - - bridge_state = drm_atomic_get_new_bridge_state(crtc_state->state, - bridge); - if (WARN_ON(!bridge_state)) - return -EINVAL; - - ret = bridge->funcs->atomic_check(bridge, bridge_state, - crtc_state, conn_state); - if (ret) - return ret; - } else if (bridge->funcs->mode_fixup) { - if (!bridge->funcs->mode_fixup(bridge, &crtc_state->mode, - &crtc_state->adjusted_mode)) - return -EINVAL; - } - - return 0; -} - -/** - * drm_atomic_bridge_chain_check() - Do an atomic check on the bridge chain - * @bridge: bridge control structure - * @crtc_state: new CRTC state - * @conn_state: new connector state - * - * Calls &drm_bridge_funcs.atomic_check() (falls back on - * &drm_bridge_funcs.mode_fixup()) op for all the bridges in the encoder chain, - * starting from the last bridge to the first. These are called before calling - * &drm_encoder_helper_funcs.atomic_check() - * - * RETURNS: - * 0 on success, a negative error code on failure - */ -int drm_atomic_bridge_chain_check(struct drm_bridge *bridge, - struct drm_crtc_state *crtc_state, - struct drm_connector_state *conn_state) -{ - struct drm_encoder *encoder = bridge->encoder; - struct drm_bridge *iter; - - list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) { - int ret; - - ret = drm_atomic_bridge_check(iter, crtc_state, conn_state); - if (ret) - return ret; - - if (iter == bridge) - break; - } - - return 0; -} -EXPORT_SYMBOL(drm_atomic_bridge_chain_check); - /** * __drm_atomic_helper_bridge_reset() - Initialize a bridge state to its * default diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index ae0595c..52d3ed15 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -128,9 +128,7 @@ struct drm_bridge_funcs { * this function passes all other callbacks must succeed for this * configuration. * - * The mode_fixup callback is optional. &drm_bridge_funcs.mode_fixup() - * is not called when &drm_bridge_funcs.atomic_check() is implemented, - * so only one of them should be provided. + * The @mode_fixup callback is optional. * * NOTE: * @@ -388,28 +386,6 @@ struct drm_bridge_funcs { struct drm_bridge_state *state); /** - * @atomic_check: - * - * This method is responsible for checking bridge state correctness. - * It can also check the state of the surrounding components in chain - * to make sure the whole pipeline can work properly. - * - * &drm_bridge_funcs.atomic_check() hooks are called in reverse - * order (from the last to the first bridge). - * - * This method is optional. &drm_bridge_funcs.mode_fixup() is not - * called when &drm_bridge_funcs.atomic_check() is implemented, so only - * one of them should be provided. - * - * RETURNS: - * zero if the check passed, a negative error code otherwise. - */ - int (*atomic_check)(struct drm_bridge *bridge, - struct drm_bridge_state *bridge_state, - struct drm_crtc_state *crtc_state, - struct drm_connector_state *conn_state); - - /** * @atomic_reset: * * Reset the bridge to a predefined state (or retrieve its current @@ -576,9 +552,6 @@ void drm_bridge_chain_mode_set(struct drm_bridge *bridge, void drm_bridge_chain_pre_enable(struct drm_bridge *bridge); void drm_bridge_chain_enable(struct drm_bridge *bridge); -int drm_atomic_bridge_chain_check(struct drm_bridge *bridge, - struct drm_crtc_state *crtc_state, - struct drm_connector_state *conn_state); void drm_atomic_bridge_chain_disable(struct drm_bridge *bridge, struct drm_atomic_state *state); void drm_atomic_bridge_chain_post_disable(struct drm_bridge *bridge, -- 2.7.4