diff options
Diffstat (limited to 'drivers/gpu/drm/drm_bridge.c')
| -rw-r--r-- | drivers/gpu/drm/drm_bridge.c | 280 |
1 files changed, 167 insertions, 113 deletions
diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index cba537c99e43..c2cf0c90fa26 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -55,7 +55,7 @@ * just provide additional hooks to get the desired output at the end of the * encoder chain. * - * Bridges can also be chained up using the &drm_bridge.next pointer. + * Bridges can also be chained up using the &drm_bridge.chain_node field. * * Both legacy CRTC helpers and the new atomic modeset helpers support bridges. */ @@ -128,20 +128,21 @@ int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge, bridge->dev = encoder->dev; bridge->encoder = encoder; + if (previous) + list_add(&bridge->chain_node, &previous->chain_node); + else + list_add(&bridge->chain_node, &encoder->bridge_chain); + if (bridge->funcs->attach) { ret = bridge->funcs->attach(bridge); if (ret < 0) { + list_del(&bridge->chain_node); bridge->dev = NULL; bridge->encoder = NULL; return ret; } } - if (previous) - previous->next = bridge; - else - encoder->bridge = bridge; - return 0; } EXPORT_SYMBOL(drm_bridge_attach); @@ -157,6 +158,7 @@ void drm_bridge_detach(struct drm_bridge *bridge) if (bridge->funcs->detach) bridge->funcs->detach(bridge); + list_del(&bridge->chain_node); bridge->dev = NULL; } @@ -172,8 +174,8 @@ void drm_bridge_detach(struct drm_bridge *bridge) */ /** - * drm_bridge_mode_fixup - fixup proposed mode for all bridges in the - * encoder chain + * drm_bridge_chain_mode_fixup - fixup proposed mode for all bridges in the + * encoder chain * @bridge: bridge control structure * @mode: desired mode to be set for the bridge * @adjusted_mode: updated mode that works for this bridge @@ -186,27 +188,31 @@ void drm_bridge_detach(struct drm_bridge *bridge) * RETURNS: * true on success, false on failure */ -bool drm_bridge_mode_fixup(struct drm_bridge *bridge, - const struct drm_display_mode *mode, - struct drm_display_mode *adjusted_mode) +bool drm_bridge_chain_mode_fixup(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) { - bool ret = true; + struct drm_encoder *encoder; if (!bridge) return true; - if (bridge->funcs->mode_fixup) - ret = bridge->funcs->mode_fixup(bridge, mode, adjusted_mode); + encoder = bridge->encoder; + list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) { + if (!bridge->funcs->mode_fixup) + continue; - ret = ret && drm_bridge_mode_fixup(bridge->next, mode, adjusted_mode); + if (!bridge->funcs->mode_fixup(bridge, mode, adjusted_mode)) + return false; + } - return ret; + return true; } -EXPORT_SYMBOL(drm_bridge_mode_fixup); +EXPORT_SYMBOL(drm_bridge_chain_mode_fixup); /** - * drm_bridge_mode_valid - validate the mode against all bridges in the - * encoder chain. + * drm_bridge_chain_mode_valid - validate the mode against all bridges in the + * encoder chain. * @bridge: bridge control structure * @mode: desired mode to be validated * @@ -219,26 +225,33 @@ EXPORT_SYMBOL(drm_bridge_mode_fixup); * RETURNS: * MODE_OK on success, drm_mode_status Enum error code on failure */ -enum drm_mode_status drm_bridge_mode_valid(struct drm_bridge *bridge, - const struct drm_display_mode *mode) +enum drm_mode_status +drm_bridge_chain_mode_valid(struct drm_bridge *bridge, + const struct drm_display_mode *mode) { - enum drm_mode_status ret = MODE_OK; + struct drm_encoder *encoder; if (!bridge) - return ret; + return MODE_OK; - if (bridge->funcs->mode_valid) - ret = bridge->funcs->mode_valid(bridge, mode); + encoder = bridge->encoder; + list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) { + enum drm_mode_status ret; - if (ret != MODE_OK) - return ret; + if (!bridge->funcs->mode_valid) + continue; - return drm_bridge_mode_valid(bridge->next, mode); + ret = bridge->funcs->mode_valid(bridge, mode); + if (ret != MODE_OK) + return ret; + } + + return MODE_OK; } -EXPORT_SYMBOL(drm_bridge_mode_valid); +EXPORT_SYMBOL(drm_bridge_chain_mode_valid); /** - * drm_bridge_disable - disables all bridges in the encoder chain + * drm_bridge_chain_disable - disables all bridges in the encoder chain * @bridge: bridge control structure * * Calls &drm_bridge_funcs.disable op for all the bridges in the encoder @@ -247,20 +260,28 @@ EXPORT_SYMBOL(drm_bridge_mode_valid); * * Note: the bridge passed should be the one closest to the encoder */ -void drm_bridge_disable(struct drm_bridge *bridge) +void drm_bridge_chain_disable(struct drm_bridge *bridge) { + struct drm_encoder *encoder; + struct drm_bridge *iter; + if (!bridge) return; - drm_bridge_disable(bridge->next); + encoder = bridge->encoder; + list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) { + if (iter->funcs->disable) + iter->funcs->disable(iter); - if (bridge->funcs->disable) - bridge->funcs->disable(bridge); + if (iter == bridge) + break; + } } -EXPORT_SYMBOL(drm_bridge_disable); +EXPORT_SYMBOL(drm_bridge_chain_disable); /** - * drm_bridge_post_disable - cleans up after disabling all bridges in the encoder chain + * drm_bridge_chain_post_disable - cleans up after disabling all bridges in the + * encoder chain * @bridge: bridge control structure * * Calls &drm_bridge_funcs.post_disable op for all the bridges in the @@ -269,47 +290,53 @@ EXPORT_SYMBOL(drm_bridge_disable); * * Note: the bridge passed should be the one closest to the encoder */ -void drm_bridge_post_disable(struct drm_bridge *bridge) +void drm_bridge_chain_post_disable(struct drm_bridge *bridge) { + struct drm_encoder *encoder; + if (!bridge) return; - if (bridge->funcs->post_disable) - bridge->funcs->post_disable(bridge); - - drm_bridge_post_disable(bridge->next); + encoder = bridge->encoder; + list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) { + if (bridge->funcs->post_disable) + bridge->funcs->post_disable(bridge); + } } -EXPORT_SYMBOL(drm_bridge_post_disable); +EXPORT_SYMBOL(drm_bridge_chain_post_disable); /** - * drm_bridge_mode_set - set proposed mode for all bridges in the - * encoder chain + * drm_bridge_chain_mode_set - set proposed mode for all bridges in the + * encoder chain * @bridge: bridge control structure - * @mode: desired mode to be set for the bridge - * @adjusted_mode: updated mode that works for this bridge + * @mode: desired mode to be set for the encoder chain + * @adjusted_mode: updated mode that works for this encoder chain * * Calls &drm_bridge_funcs.mode_set op for all the bridges in the * encoder chain, starting from the first bridge to the last. * * Note: the bridge passed should be the one closest to the encoder */ -void drm_bridge_mode_set(struct drm_bridge *bridge, - const struct drm_display_mode *mode, - const struct drm_display_mode *adjusted_mode) +void drm_bridge_chain_mode_set(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + const struct drm_display_mode *adjusted_mode) { + struct drm_encoder *encoder; + if (!bridge) return; - if (bridge->funcs->mode_set) - bridge->funcs->mode_set(bridge, mode, adjusted_mode); - - drm_bridge_mode_set(bridge->next, mode, adjusted_mode); + encoder = bridge->encoder; + list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) { + if (bridge->funcs->mode_set) + bridge->funcs->mode_set(bridge, mode, adjusted_mode); + } } -EXPORT_SYMBOL(drm_bridge_mode_set); +EXPORT_SYMBOL(drm_bridge_chain_mode_set); /** - * drm_bridge_pre_enable - prepares for enabling all - * bridges in the encoder chain + * drm_bridge_chain_pre_enable - prepares for enabling all bridges in the + * encoder chain * @bridge: bridge control structure * * Calls &drm_bridge_funcs.pre_enable op for all the bridges in the encoder @@ -318,20 +345,24 @@ EXPORT_SYMBOL(drm_bridge_mode_set); * * Note: the bridge passed should be the one closest to the encoder */ -void drm_bridge_pre_enable(struct drm_bridge *bridge) +void drm_bridge_chain_pre_enable(struct drm_bridge *bridge) { + struct drm_encoder *encoder; + struct drm_bridge *iter; + if (!bridge) return; - drm_bridge_pre_enable(bridge->next); - - if (bridge->funcs->pre_enable) - bridge->funcs->pre_enable(bridge); + encoder = bridge->encoder; + list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) { + if (iter->funcs->pre_enable) + iter->funcs->pre_enable(iter); + } } -EXPORT_SYMBOL(drm_bridge_pre_enable); +EXPORT_SYMBOL(drm_bridge_chain_pre_enable); /** - * drm_bridge_enable - enables all bridges in the encoder chain + * drm_bridge_chain_enable - enables all bridges in the encoder chain * @bridge: bridge control structure * * Calls &drm_bridge_funcs.enable op for all the bridges in the encoder @@ -340,22 +371,25 @@ EXPORT_SYMBOL(drm_bridge_pre_enable); * * Note that the bridge passed should be the one closest to the encoder */ -void drm_bridge_enable(struct drm_bridge *bridge) +void drm_bridge_chain_enable(struct drm_bridge *bridge) { + struct drm_encoder *encoder; + if (!bridge) return; - if (bridge->funcs->enable) - bridge->funcs->enable(bridge); - - drm_bridge_enable(bridge->next); + encoder = bridge->encoder; + list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) { + if (bridge->funcs->enable) + bridge->funcs->enable(bridge); + } } -EXPORT_SYMBOL(drm_bridge_enable); +EXPORT_SYMBOL(drm_bridge_chain_enable); /** - * drm_atomic_bridge_disable - disables all bridges in the encoder chain + * drm_atomic_bridge_chain_disable - disables all bridges in the encoder chain * @bridge: bridge control structure - * @state: atomic state being committed + * @old_state: old atomic state * * Calls &drm_bridge_funcs.atomic_disable (falls back on * &drm_bridge_funcs.disable) op for all the bridges in the encoder chain, @@ -364,26 +398,33 @@ EXPORT_SYMBOL(drm_bridge_enable); * * Note: the bridge passed should be the one closest to the encoder */ -void drm_atomic_bridge_disable(struct drm_bridge *bridge, - struct drm_atomic_state *state) +void drm_atomic_bridge_chain_disable(struct drm_bridge *bridge, + struct drm_atomic_state *old_state) { + struct drm_encoder *encoder; + struct drm_bridge *iter; + if (!bridge) return; - drm_atomic_bridge_disable(bridge->next, state); + encoder = bridge->encoder; + list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) { + if (iter->funcs->atomic_disable) + iter->funcs->atomic_disable(iter, old_state); + else if (iter->funcs->disable) + iter->funcs->disable(iter); - if (bridge->funcs->atomic_disable) - bridge->funcs->atomic_disable(bridge, state); - else if (bridge->funcs->disable) - bridge->funcs->disable(bridge); + if (iter == bridge) + break; + } } -EXPORT_SYMBOL(drm_atomic_bridge_disable); +EXPORT_SYMBOL(drm_atomic_bridge_chain_disable); /** - * drm_atomic_bridge_post_disable - cleans up after disabling all bridges in the - * encoder chain + * drm_atomic_bridge_chain_post_disable - cleans up after disabling all bridges + * in the encoder chain * @bridge: bridge control structure - * @state: atomic state being committed + * @old_state: old atomic state * * Calls &drm_bridge_funcs.atomic_post_disable (falls back on * &drm_bridge_funcs.post_disable) op for all the bridges in the encoder chain, @@ -392,26 +433,29 @@ EXPORT_SYMBOL(drm_atomic_bridge_disable); * * Note: the bridge passed should be the one closest to the encoder */ -void drm_atomic_bridge_post_disable(struct drm_bridge *bridge, - struct drm_atomic_state *state) +void drm_atomic_bridge_chain_post_disable(struct drm_bridge *bridge, + struct drm_atomic_state *old_state) { + struct drm_encoder *encoder; + if (!bridge) return; - if (bridge->funcs->atomic_post_disable) - bridge->funcs->atomic_post_disable(bridge, state); - else if (bridge->funcs->post_disable) - bridge->funcs->post_disable(bridge); - - drm_atomic_bridge_post_disable(bridge->next, state); + encoder = bridge->encoder; + list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) { + if (bridge->funcs->atomic_post_disable) + bridge->funcs->atomic_post_disable(bridge, old_state); + else if (bridge->funcs->post_disable) + bridge->funcs->post_disable(bridge); + } } -EXPORT_SYMBOL(drm_atomic_bridge_post_disable); +EXPORT_SYMBOL(drm_atomic_bridge_chain_post_disable); /** - * drm_atomic_bridge_pre_enable - prepares for enabling all bridges in the - * encoder chain + * drm_atomic_bridge_chain_pre_enable - prepares for enabling all bridges in + * the encoder chain * @bridge: bridge control structure - * @state: atomic state being committed + * @old_state: old atomic state * * Calls &drm_bridge_funcs.atomic_pre_enable (falls back on * &drm_bridge_funcs.pre_enable) op for all the bridges in the encoder chain, @@ -420,25 +464,32 @@ EXPORT_SYMBOL(drm_atomic_bridge_post_disable); * * Note: the bridge passed should be the one closest to the encoder */ -void drm_atomic_bridge_pre_enable(struct drm_bridge *bridge, - struct drm_atomic_state *state) +void drm_atomic_bridge_chain_pre_enable(struct drm_bridge *bridge, + struct drm_atomic_state *old_state) { + struct drm_encoder *encoder; + struct drm_bridge *iter; + if (!bridge) return; - drm_atomic_bridge_pre_enable(bridge->next, state); + encoder = bridge->encoder; + list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) { + if (iter->funcs->atomic_pre_enable) + iter->funcs->atomic_pre_enable(iter, old_state); + else if (iter->funcs->pre_enable) + iter->funcs->pre_enable(iter); - if (bridge->funcs->atomic_pre_enable) - bridge->funcs->atomic_pre_enable(bridge, state); - else if (bridge->funcs->pre_enable) - bridge->funcs->pre_enable(bridge); + if (iter == bridge) + break; + } } -EXPORT_SYMBOL(drm_atomic_bridge_pre_enable); +EXPORT_SYMBOL(drm_atomic_bridge_chain_pre_enable); /** - * drm_atomic_bridge_enable - enables all bridges in the encoder chain + * drm_atomic_bridge_chain_enable - enables all bridges in the encoder chain * @bridge: bridge control structure - * @state: atomic state being committed + * @old_state: old atomic state * * Calls &drm_bridge_funcs.atomic_enable (falls back on * &drm_bridge_funcs.enable) op for all the bridges in the encoder chain, @@ -447,20 +498,23 @@ EXPORT_SYMBOL(drm_atomic_bridge_pre_enable); * * Note: the bridge passed should be the one closest to the encoder */ -void drm_atomic_bridge_enable(struct drm_bridge *bridge, - struct drm_atomic_state *state) +void drm_atomic_bridge_chain_enable(struct drm_bridge *bridge, + struct drm_atomic_state *old_state) { + struct drm_encoder *encoder; + if (!bridge) return; - if (bridge->funcs->atomic_enable) - bridge->funcs->atomic_enable(bridge, state); - else if (bridge->funcs->enable) - bridge->funcs->enable(bridge); - - drm_atomic_bridge_enable(bridge->next, state); + encoder = bridge->encoder; + list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) { + if (bridge->funcs->atomic_enable) + bridge->funcs->atomic_enable(bridge, old_state); + else if (bridge->funcs->enable) + bridge->funcs->enable(bridge); + } } -EXPORT_SYMBOL(drm_atomic_bridge_enable); +EXPORT_SYMBOL(drm_atomic_bridge_chain_enable); #ifdef CONFIG_OF /** |