1 files changed, 92 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/include/i2caux_interface.h b/drivers/gpu/drm/amd/display/include/i2caux_interface.h
new file mode 100644
index 000000000000..13a3c82d118f
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/include/i2caux_interface.h
@@ -0,0 +1,92 @@
+/*
+ * 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_I2CAUX_INTERFACE_H__
+#define __DAL_I2CAUX_INTERFACE_H__
+
+#include "dc_types.h"
+#include "gpio_service_interface.h"
+
+
+#define DEFAULT_AUX_MAX_DATA_SIZE 16
+#define AUX_MAX_DEFER_WRITE_RETRY 20
+
+struct aux_payload {
+	/* set following flag to read/write I2C data,
+	 * reset it to read/write DPCD data */
+	bool i2c_over_aux;
+	/* set following flag to write data,
+	 * reset it to read data */
+	bool write;
+	uint32_t address;
+	uint8_t length;
+	uint8_t *data;
+};
+
+struct aux_command {
+	struct aux_payload *payloads;
+	uint8_t number_of_payloads;
+
+	/* expressed in milliseconds
+	 * zero means "use default value" */
+	uint32_t defer_delay;
+
+	/* zero means "use default value" */
+	uint32_t max_defer_write_retry;
+
+	enum i2c_mot_mode mot;
+};
+
+union aux_config {
+	struct {
+		uint32_t ALLOW_AUX_WHEN_HPD_LOW:1;
+	} bits;
+	uint32_t raw;
+};
+
+struct i2caux;
+
+struct i2caux *dal_i2caux_create(
+	struct dc_context *ctx);
+
+bool dal_i2caux_submit_i2c_command(
+	struct i2caux *i2caux,
+	struct ddc *ddc,
+	struct i2c_command *cmd);
+
+bool dal_i2caux_submit_aux_command(
+	struct i2caux *i2caux,
+	struct ddc *ddc,
+	struct aux_command *cmd);
+
+void dal_i2caux_configure_aux(
+	struct i2caux *i2caux,
+	struct ddc *ddc,
+	union aux_config cfg);
+
+void dal_i2caux_destroy(
+	struct i2caux **ptr);
+
+#endif