---
name: "struct_drm_dp_aux_msg"
section: "9"
platform: "linux"
package: "linux-manual-3.16"
version: "3.16.56-1+deb8u1"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/struct_drm_dp_aux_msg"
---

# struct\_drm\_dp\_aux\_msg(9)

DisplayPort AUX channel transaction

## NAME

struct\_drm\_dp\_aux\_msg - DisplayPort AUX channel transaction

## SYNOPSIS

```
struct drm_dp_aux_msg {
  unsigned int address;
  u8 request;
  u8 reply;
  void * buffer;
  size_t size;
};
```

## MEMBERS

address

address of the (first) register to access

request

contains the type of transaction (see DP\_AUX\_\* macros)

reply

upon completion, contains the reply type of the transaction

buffer

pointer to a transmission or reception buffer

size

size of *buffer*

## AUTHORS

**Jesse Barnes** \<jesse.barnes@intel.com\>\
 Intel Corporation,

Initial version

**Laurent Pinchart** \<laurent.pinchart@ideasonboard.com\>\
 Ideas on board SPRL,

Driver internals

**Daniel Vetter** \<daniel.vetter@ffwll.ch\>\
 Intel Corporation,

Contributions all over the place

## COPYRIGHT