#include <linux/module.h>
#include <linux/mutex.h>
+#include <drm/drm_atomic_state_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_encoder.h>
}
EXPORT_SYMBOL(drm_bridge_remove);
+static struct drm_bridge_state *
+drm_atomic_default_bridge_duplicate_state(struct drm_bridge *bridge)
+{
+ struct drm_bridge_state *new;
+
+ if (WARN_ON(!bridge->base.state))
+ return NULL;
+
+ new = kzalloc(sizeof(*new), GFP_KERNEL);
+ if (new)
+ __drm_atomic_helper_bridge_duplicate_state(bridge, new);
+
+ return new;
+}
+
+static struct drm_private_state *
+drm_bridge_atomic_duplicate_priv_state(struct drm_private_obj *obj)
+{
+ struct drm_bridge *bridge = drm_priv_to_bridge(obj);
+ struct drm_bridge_state *state;
+
+ if (bridge->funcs->atomic_duplicate_state)
+ state = bridge->funcs->atomic_duplicate_state(bridge);
+ else
+ state = drm_atomic_default_bridge_duplicate_state(bridge);
+
+ return state ? &state->base : NULL;
+}
+
+static void
+drm_atomic_default_bridge_destroy_state(struct drm_bridge *bridge,
+ struct drm_bridge_state *state)
+{
+ /* Just a simple kfree() for now */
+ kfree(state);
+}
+
+static void
+drm_bridge_atomic_destroy_priv_state(struct drm_private_obj *obj,
+ struct drm_private_state *s)
+{
+ struct drm_bridge_state *state = drm_priv_to_bridge_state(s);
+ struct drm_bridge *bridge = drm_priv_to_bridge(obj);
+
+ if (bridge->funcs->atomic_destroy_state)
+ bridge->funcs->atomic_destroy_state(bridge, state);
+ else
+ drm_atomic_default_bridge_destroy_state(bridge, state);
+}
+
+static const struct drm_private_state_funcs drm_bridge_priv_state_funcs = {
+ .atomic_duplicate_state = drm_bridge_atomic_duplicate_priv_state,
+ .atomic_destroy_state = drm_bridge_atomic_destroy_priv_state,
+};
+
+static struct drm_bridge_state *
+drm_atomic_default_bridge_reset(struct drm_bridge *bridge)
+{
+ struct drm_bridge_state *bridge_state;
+
+ bridge_state = kzalloc(sizeof(*bridge_state), GFP_KERNEL);
+ if (!bridge_state)
+ return ERR_PTR(-ENOMEM);
+
+ __drm_atomic_helper_bridge_reset(bridge, bridge_state);
+ return bridge_state;
+}
+
/**
* drm_bridge_attach - attach the bridge to an encoder's chain
*
int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
struct drm_bridge *previous)
{
+ struct drm_bridge_state *state;
int ret;
if (!encoder || !bridge)
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 (ret < 0)
+ goto err_reset_bridge;
}
+ if (bridge->funcs->atomic_reset)
+ state = bridge->funcs->atomic_reset(bridge);
+ else
+ state = drm_atomic_default_bridge_reset(bridge);
+
+ if (IS_ERR(state)) {
+ ret = PTR_ERR(state);
+ goto err_detach_bridge;
+ }
+
+ drm_atomic_private_obj_init(bridge->dev, &bridge->base,
+ &state->base,
+ &drm_bridge_priv_state_funcs);
+
return 0;
+
+err_detach_bridge:
+ if (bridge->funcs->detach)
+ bridge->funcs->detach(bridge);
+
+err_reset_bridge:
+ bridge->dev = NULL;
+ bridge->encoder = NULL;
+ list_del(&bridge->chain_node);
+ return ret;
}
EXPORT_SYMBOL(drm_bridge_attach);
if (WARN_ON(!bridge->dev))
return;
+ drm_atomic_private_obj_fini(&bridge->base);
+
if (bridge->funcs->detach)
bridge->funcs->detach(bridge);
/**
* 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,
* Note: the bridge passed should be the one closest to the encoder
*/
void drm_atomic_bridge_chain_disable(struct drm_bridge *bridge,
- struct drm_atomic_state *state)
+ struct drm_atomic_state *old_state)
{
struct drm_encoder *encoder;
struct drm_bridge *iter;
encoder = bridge->encoder;
list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) {
- if (iter->funcs->atomic_disable)
- iter->funcs->atomic_disable(iter, state);
- else if (iter->funcs->disable)
+ if (iter->funcs->atomic_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_disable(iter, old_bridge_state);
+ } else if (iter->funcs->disable) {
iter->funcs->disable(iter);
+ }
if (iter == bridge)
break;
* 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,
* Note: the bridge passed should be the one closest to the encoder
*/
void drm_atomic_bridge_chain_post_disable(struct drm_bridge *bridge,
- struct drm_atomic_state *state)
+ struct drm_atomic_state *old_state)
{
struct drm_encoder *encoder;
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, state);
- else if (bridge->funcs->post_disable)
+ if (bridge->funcs->atomic_post_disable) {
+ 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_post_disable(bridge,
+ old_bridge_state);
+ } else if (bridge->funcs->post_disable) {
bridge->funcs->post_disable(bridge);
+ }
}
}
EXPORT_SYMBOL(drm_atomic_bridge_chain_post_disable);
* 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,
* Note: the bridge passed should be the one closest to the encoder
*/
void drm_atomic_bridge_chain_pre_enable(struct drm_bridge *bridge,
- struct drm_atomic_state *state)
+ struct drm_atomic_state *old_state)
{
struct drm_encoder *encoder;
struct drm_bridge *iter;
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, state);
- else if (iter->funcs->pre_enable)
+ if (iter->funcs->atomic_pre_enable) {
+ 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_pre_enable(iter, old_bridge_state);
+ } else if (iter->funcs->pre_enable) {
iter->funcs->pre_enable(iter);
+ }
if (iter == bridge)
break;
/**
* 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,
* Note: the bridge passed should be the one closest to the encoder
*/
void drm_atomic_bridge_chain_enable(struct drm_bridge *bridge,
- struct drm_atomic_state *state)
+ struct drm_atomic_state *old_state)
{
struct drm_encoder *encoder;
encoder = bridge->encoder;
list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) {
- if (bridge->funcs->atomic_enable)
- bridge->funcs->atomic_enable(bridge, state);
- else if (bridge->funcs->enable)
+ if (bridge->funcs->atomic_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_enable(bridge, old_bridge_state);
+ } else if (bridge->funcs->enable) {
bridge->funcs->enable(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
+ * @bridge: the bridge this state is refers to
+ * @state: bridge state to initialize
+ *
+ * Initialize the bridge state to default values. This is meant to be* called
+ * by the bridge &drm_plane_funcs.reset hook for bridges that subclass the
+ * bridge state.
+ */
+void __drm_atomic_helper_bridge_reset(struct drm_bridge *bridge,
+ struct drm_bridge_state *state)
+{
+ memset(state, 0, sizeof(*state));
+ state->bridge = bridge;
+}
+EXPORT_SYMBOL(__drm_atomic_helper_bridge_reset);
+
+/**
+ * __drm_atomic_helper_bridge_duplicate_state() - Copy atomic bridge state
+ * @bridge: bridge object
+ * @state: atomic bridge state
+ *
+ * Copies atomic state from a bridge's current state and resets inferred values.
+ * This is useful for drivers that subclass the bridge state.
+ */
+void __drm_atomic_helper_bridge_duplicate_state(struct drm_bridge *bridge,
+ struct drm_bridge_state *state)
+{
+ __drm_atomic_helper_private_obj_duplicate_state(&bridge->base,
+ &state->base);
+ state->bridge = bridge;
+}
+EXPORT_SYMBOL(__drm_atomic_helper_bridge_duplicate_state);
+
#ifdef CONFIG_OF
/**
* of_drm_find_bridge - find the bridge corresponding to the device node in
projects / linux.git / blobdiff