Initial import

1 files changed, 182 insertions, 0 deletions

diff --git a/include/drm/drm_encoder_slave.h b/include/drm/drm_encoder_slave.h
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index 000000000..8b9cc3671
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+++ b/include/drm/drm_encoder_slave.h
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+/*
+ * Copyright (C) 2009 Francisco Jerez.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __DRM_ENCODER_SLAVE_H__
+#define __DRM_ENCODER_SLAVE_H__
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+
+/**
+ * struct drm_encoder_slave_funcs - Entry points exposed by a slave encoder driver
+ * @set_config:	Initialize any encoder-specific modesetting parameters.
+ *		The meaning of the @params parameter is implementation
+ *		dependent. It will usually be a structure with DVO port
+ *		data format settings or timings. It's not required for
+ *		the new parameters to take effect until the next mode
+ *		is set.
+ *
+ * Most of its members are analogous to the function pointers in
+ * &drm_encoder_helper_funcs and they can optionally be used to
+ * initialize the latter. Connector-like methods (e.g. @get_modes and
+ * @set_property) will typically be wrapped around and only be called
+ * if the encoder is the currently selected one for the connector.
+ */
+struct drm_encoder_slave_funcs {
+	void (*set_config)(struct drm_encoder *encoder,
+			   void *params);
+
+	void (*destroy)(struct drm_encoder *encoder);
+	void (*dpms)(struct drm_encoder *encoder, int mode);
+	void (*save)(struct drm_encoder *encoder);
+	void (*restore)(struct drm_encoder *encoder);
+	bool (*mode_fixup)(struct drm_encoder *encoder,
+			   const struct drm_display_mode *mode,
+			   struct drm_display_mode *adjusted_mode);
+	int (*mode_valid)(struct drm_encoder *encoder,
+			  struct drm_display_mode *mode);
+	void (*mode_set)(struct drm_encoder *encoder,
+			 struct drm_display_mode *mode,
+			 struct drm_display_mode *adjusted_mode);
+
+	enum drm_connector_status (*detect)(struct drm_encoder *encoder,
+					    struct drm_connector *connector);
+	int (*get_modes)(struct drm_encoder *encoder,
+			 struct drm_connector *connector);
+	int (*create_resources)(struct drm_encoder *encoder,
+				 struct drm_connector *connector);
+	int (*set_property)(struct drm_encoder *encoder,
+			    struct drm_connector *connector,
+			    struct drm_property *property,
+			    uint64_t val);
+
+};
+
+/**
+ * struct drm_encoder_slave - Slave encoder struct
+ * @base: DRM encoder object.
+ * @slave_funcs: Slave encoder callbacks.
+ * @slave_priv: Slave encoder private data.
+ * @bus_priv: Bus specific data.
+ *
+ * A &drm_encoder_slave has two sets of callbacks, @slave_funcs and the
+ * ones in @base. The former are never actually called by the common
+ * CRTC code, it's just a convenience for splitting the encoder
+ * functions in an upper, GPU-specific layer and a (hopefully)
+ * GPU-agnostic lower layer: It's the GPU driver responsibility to
+ * call the slave methods when appropriate.
+ *
+ * drm_i2c_encoder_init() provides a way to get an implementation of
+ * this.
+ */
+struct drm_encoder_slave {
+	struct drm_encoder base;
+
+	struct drm_encoder_slave_funcs *slave_funcs;
+	void *slave_priv;
+	void *bus_priv;
+};
+#define to_encoder_slave(x) container_of((x), struct drm_encoder_slave, base)
+
+int drm_i2c_encoder_init(struct drm_device *dev,
+			 struct drm_encoder_slave *encoder,
+			 struct i2c_adapter *adap,
+			 const struct i2c_board_info *info);
+
+
+/**
+ * struct drm_i2c_encoder_driver
+ *
+ * Describes a device driver for an encoder connected to the GPU
+ * through an I2C bus. In addition to the entry points in @i2c_driver
+ * an @encoder_init function should be provided. It will be called to
+ * give the driver an opportunity to allocate any per-encoder data
+ * structures and to initialize the @slave_funcs and (optionally)
+ * @slave_priv members of @encoder.
+ */
+struct drm_i2c_encoder_driver {
+	struct i2c_driver i2c_driver;
+
+	int (*encoder_init)(struct i2c_client *client,
+			    struct drm_device *dev,
+			    struct drm_encoder_slave *encoder);
+
+};
+#define to_drm_i2c_encoder_driver(x) container_of((x),			\
+						  struct drm_i2c_encoder_driver, \
+						  i2c_driver)
+
+/**
+ * drm_i2c_encoder_get_client - Get the I2C client corresponding to an encoder
+ */
+static inline struct i2c_client *drm_i2c_encoder_get_client(struct drm_encoder *encoder)
+{
+	return (struct i2c_client *)to_encoder_slave(encoder)->bus_priv;
+}
+
+/**
+ * drm_i2c_encoder_register - Register an I2C encoder driver
+ * @owner:	Module containing the driver.
+ * @driver:	Driver to be registered.
+ */
+static inline int drm_i2c_encoder_register(struct module *owner,
+					   struct drm_i2c_encoder_driver *driver)
+{
+	return i2c_register_driver(owner, &driver->i2c_driver);
+}
+
+/**
+ * drm_i2c_encoder_unregister - Unregister an I2C encoder driver
+ * @driver:	Driver to be unregistered.
+ */
+static inline void drm_i2c_encoder_unregister(struct drm_i2c_encoder_driver *driver)
+{
+	i2c_del_driver(&driver->i2c_driver);
+}
+
+void drm_i2c_encoder_destroy(struct drm_encoder *encoder);
+
+
+/*
+ * Wrapper fxns which can be plugged in to drm_encoder_helper_funcs:
+ */
+
+void drm_i2c_encoder_dpms(struct drm_encoder *encoder, int mode);
+bool drm_i2c_encoder_mode_fixup(struct drm_encoder *encoder,
+		const struct drm_display_mode *mode,
+		struct drm_display_mode *adjusted_mode);
+void drm_i2c_encoder_prepare(struct drm_encoder *encoder);
+void drm_i2c_encoder_commit(struct drm_encoder *encoder);
+void drm_i2c_encoder_mode_set(struct drm_encoder *encoder,
+		struct drm_display_mode *mode,
+		struct drm_display_mode *adjusted_mode);
+enum drm_connector_status drm_i2c_encoder_detect(struct drm_encoder *encoder,
+	    struct drm_connector *connector);
+void drm_i2c_encoder_save(struct drm_encoder *encoder);
+void drm_i2c_encoder_restore(struct drm_encoder *encoder);
+
+
+#endif