1 files changed, 113 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/i2c_engine.h b/drivers/gpu/drm/amd/display/dc/i2caux/i2c_engine.h
new file mode 100644
index 000000000000..58fc0f25eceb
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/i2caux/i2c_engine.h
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * 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 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 HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DAL_I2C_ENGINE_H__
+#define __DAL_I2C_ENGINE_H__
+
+enum i2c_channel_operation_result {
+	I2C_CHANNEL_OPERATION_SUCCEEDED,
+	I2C_CHANNEL_OPERATION_FAILED,
+	I2C_CHANNEL_OPERATION_NOT_GRANTED,
+	I2C_CHANNEL_OPERATION_IS_BUSY,
+	I2C_CHANNEL_OPERATION_NO_HANDLE_PROVIDED,
+	I2C_CHANNEL_OPERATION_CHANNEL_IN_USE,
+	I2C_CHANNEL_OPERATION_CHANNEL_CLIENT_MAX_ALLOWED,
+	I2C_CHANNEL_OPERATION_ENGINE_BUSY,
+	I2C_CHANNEL_OPERATION_TIMEOUT,
+	I2C_CHANNEL_OPERATION_NO_RESPONSE,
+	I2C_CHANNEL_OPERATION_HW_REQUEST_I2C_BUS,
+	I2C_CHANNEL_OPERATION_WRONG_PARAMETER,
+	I2C_CHANNEL_OPERATION_OUT_NB_OF_RETRIES,
+	I2C_CHANNEL_OPERATION_NOT_STARTED
+};
+
+struct i2c_request_transaction_data {
+	enum i2caux_transaction_action action;
+	enum i2c_channel_operation_result status;
+	uint8_t address;
+	uint32_t length;
+	uint8_t *data;
+};
+
+struct i2c_reply_transaction_data {
+	uint32_t length;
+	uint8_t *data;
+};
+
+struct i2c_engine;
+
+struct i2c_engine_funcs {
+	void (*destroy)(
+		struct i2c_engine **ptr);
+	uint32_t (*get_speed)(
+		const struct i2c_engine *engine);
+	void (*set_speed)(
+		struct i2c_engine *engine,
+		uint32_t speed);
+	bool (*acquire_engine)(
+		struct i2c_engine *engine,
+		struct ddc *ddc);
+	bool (*setup_engine)(
+		struct i2c_engine *engine);
+	void (*submit_channel_request)(
+		struct i2c_engine *engine,
+		struct i2c_request_transaction_data *request);
+	void (*process_channel_reply)(
+		struct i2c_engine *engine,
+		struct i2c_reply_transaction_data *reply);
+	enum i2c_channel_operation_result (*get_channel_status)(
+		struct i2c_engine *engine,
+		uint8_t *returned_bytes);
+};
+
+struct i2c_engine {
+	struct engine base;
+	const struct i2c_engine_funcs *funcs;
+	uint32_t timeout_delay;
+};
+
+void dal_i2c_engine_construct(
+	struct i2c_engine *engine,
+	struct dc_context *ctx);
+
+void dal_i2c_engine_destruct(
+	struct i2c_engine *engine);
+
+bool dal_i2c_engine_setup_i2c_engine(
+	struct i2c_engine *engine);
+
+void dal_i2c_engine_submit_channel_request(
+	struct i2c_engine *engine,
+	struct i2c_request_transaction_data *request);
+
+void dal_i2c_engine_process_channel_reply(
+	struct i2c_engine *engine,
+	struct i2c_reply_transaction_data *reply);
+
+bool dal_i2c_engine_acquire(
+	struct engine *ptr,
+	struct ddc *ddc_handle);
+
+#endif