1 files changed, 41 insertions, 0 deletions
diff --git a/src/lib/dp_aux.c b/src/lib/dp_aux.c
new file mode 100644
index 0000000000..ee3ac8ab00
--- /dev/null
+++ b/src/lib/dp_aux.c
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <delay.h>
+#include <dp_aux.h>
+#include <console/console.h>
+#include <timer.h>
+
+bool dp_aux_request_is_write(enum aux_request request)
+{
+	switch (request) {
+	case I2C_RAW_WRITE_AND_STOP:
+	case I2C_RAW_WRITE:
+	case DPCD_WRITE:
+		return true;
+	default:
+		return false;
+	}
+}
+
+enum i2c_over_aux dp_get_aux_cmd(enum aux_request request, uint32_t remaining_after_this)
+{
+	switch (request) {
+	case I2C_RAW_WRITE_AND_STOP:
+		if (!remaining_after_this)
+			return I2C_OVER_AUX_WRITE_MOT_0;
+		/* fallthrough */
+	case I2C_RAW_WRITE:
+		return I2C_OVER_AUX_WRITE_MOT_1;
+	case I2C_RAW_READ_AND_STOP:
+		if (!remaining_after_this)
+			return I2C_OVER_AUX_READ_MOT_0;
+		/* fallthrough */
+	case I2C_RAW_READ:
+		return I2C_OVER_AUX_READ_MOT_1;
+	case DPCD_WRITE:
+		return NATIVE_AUX_WRITE;
+	case DPCD_READ:
+	default:
+		return NATIVE_AUX_READ;
+	}
+}