diff options
Diffstat (limited to 'drivers/gpu/drm/drm_bridge.c')
| -rw-r--r-- | drivers/gpu/drm/drm_bridge.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index 7044e339a82c..9efdf50ab5f8 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -691,6 +691,49 @@ void drm_atomic_bridge_chain_disable(struct drm_bridge *bridge, } EXPORT_SYMBOL(drm_atomic_bridge_chain_disable); +/** + * drm_atomic_bridge_chain_late_disable - disables all bridges in the encoder chain + * after crtc is disabled. + * @bridge: bridge control structure + * @old_state: old atomic state + * + * Calls &drm_bridge_funcs.atomic_late_disable op for all the bridges in the + * encoder chain, starting from the last bridge to the first. These are called + * after calling &drm_crtc_helper_funcs.atomic_late_disable + * + * Note: the bridge passed should be the one closest to the encoder + */ +void drm_atomic_bridge_chain_late_disable(struct drm_bridge *bridge, + struct drm_atomic_state *old_state) +{ + struct drm_encoder *encoder; + struct drm_bridge *iter; + + if (!bridge) + return; + + encoder = bridge->encoder; + list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) { + if (iter->funcs->atomic_late_disable) { + struct drm_bridge_state *old_bridge_state; + + old_bridge_state = + drm_atomic_get_old_bridge_state(old_state, + iter); + if (WARN_ON(!old_bridge_state)) + return; + + iter->funcs->atomic_late_disable(iter, old_bridge_state); + } else if (iter->funcs->late_disable) { + iter->funcs->late_disable(iter); + } + + if (iter == bridge) + break; + } +} +EXPORT_SYMBOL(drm_atomic_bridge_chain_late_disable); + static void drm_atomic_bridge_call_post_disable(struct drm_bridge *bridge, struct drm_atomic_state *old_state) { @@ -783,6 +826,45 @@ void drm_atomic_bridge_chain_post_disable(struct drm_bridge *bridge, } EXPORT_SYMBOL(drm_atomic_bridge_chain_post_disable); +/** + * drm_atomic_bridge_chain_early_enable - enables all bridges in the encoder + * chain before it's crtc is enabled + * @bridge: bridge control structure + * @old_state: old atomic state + * + * Calls &drm_bridge_funcs.atomic_early_enable op for all the bridges in the + * encoder chain, starting from the first bridge to the last. These are called + * before even the &drm_crtc_helper_funcs.atomic_enable is called. + * + * Note: the bridge passed should be the one closest to the encoder + */ +void drm_atomic_bridge_chain_early_enable(struct drm_bridge *bridge, + struct drm_atomic_state *old_state) +{ + struct drm_encoder *encoder; + + if (!bridge) + return; + + encoder = bridge->encoder; + list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) { + if (bridge->funcs->atomic_early_enable) { + struct drm_bridge_state *old_bridge_state; + + old_bridge_state = + drm_atomic_get_old_bridge_state(old_state, + bridge); + if (WARN_ON(!old_bridge_state)) + return; + + bridge->funcs->atomic_early_enable(bridge, old_bridge_state); + } else if (bridge->funcs->early_enable) { + bridge->funcs->early_enable(bridge); + } + } +} +EXPORT_SYMBOL(drm_atomic_bridge_chain_early_enable); + static void drm_atomic_bridge_call_pre_enable(struct drm_bridge *bridge, struct drm_atomic_state *old_state) { |