// iddcx.h

typedef enum IDDCX_UPDATE_REASON {
  IDDCX_UPDATE_REASON_UNINITIALIZED = 0,
  IDDCX_UPDATE_REASON_POWER_CONSTRAINTS = 1,
  IDDCX_UPDATE_REASON_HOST_LINK_BANDWIDTH = 2,
  IDDCX_UPDATE_REASON_DISPLAY_LINK_BANDWIDTH = 3,
  IDDCX_UPDATE_REASON_CONFIGURATION_CONSTRAINTS = 4,
  IDDCX_UPDATE_REASON_OTHER = 5
} ;
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Windows Driver Kit DDI reference (ne-iddcx-iddcx_update_reason)

IDDCX_UPDATE_REASON enumeration

Description

A IDDCX_UPDATE_REASON value describes why the driver is calling to update the mode list.

Constants

`IDDCX_UPDATE_REASON_UNINITIALIZED:0`

Indicates that an IDDCX_UPDATE_REASON variable has not yet been assigned a meaningful value.

`IDDCX_UPDATE_REASON_POWER_CONSTRAINTS:1`

The mode list is changing due to changed power constraints on the host system.

`IDDCX_UPDATE_REASON_HOST_LINK_BANDWIDTH:2`

The mode list is changing due to changes in bandwidth between the system and the indirect display device.

`IDDCX_UPDATE_REASON_DISPLAY_LINK_BANDWIDTH:3`

The mode list is changing due to changes in bandwidth between the indirect display device and the monitor.

`IDDCX_UPDATE_REASON_CONFIGURATION_CONSTRAINTS:4`

The mode list is changing due to constraints of the product when in a new configuration.

`IDDCX_UPDATE_REASON_OTHER:5`

The mode list is changing due to another reason not listed above.

IDDCX_UPDATE_REASON - NtDoc