1 # SPDX-License-Identifier: (GPL-2.0-only OR BS
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/mailbox/med
5 $schema: http://devicetree.org/meta-schemas/co
6
7 title: MediaTek Global Command Engine Common P
8
9 maintainers:
10 - Houlong Wei <houlong.wei@mediatek.com>
11
12 description:
13 The Global Command Engine (GCE) is an instru
14 single-core command dispatcher for MediaTek
15 (CMDQ) mailbox driver is a driver for GCE, i
16 mailbox framework. It is used to receive mes
17 and configure GCE to execute the specified i
18 We use mediatek,gce-mailbox.yaml to define t
19 driver. A device driver that uses the CMDQ d
20 registers is a mailbox consumer. The mailbox
21 channel corresponding to a GCE hardware thre
22 that the GCE thread to configure its hardwar
23 reserve a mailbox channel to configure GCE h
24 GCE thread. This binding defines the common
25 provider and consumers.
26
27 properties:
28 mediatek,gce-events:
29 description:
30 GCE has an event table in SRAM, consisti
31 Each event ID has a boolean event value
32 The property mediatek,gce-events is used
33 Some gce-events are hardware-bound and c
34 For instance, in MT8195, when VDO0_MUTEX
35 send an event signal to GCE, setting the
36 Similarly, in MT8188, the value of event
37 VOD0_MUTEX is stream done.
38 On the other hand, some gce-events are n
39 changed by software. For example, in MT8
40 event ID 855, which is not bound to any
41 in the secure world completes a task. Ho
42 is already bound to VDEC_LAT1, so we nee
43 achieve the same purpose. This event ID
44 to any hardware and is not yet used in a
45 To determine if the event ID is bound to
46 software driver, refer to the GCE header
47 include/dt-bindings/gce/<chip>-gce.h of
48 $ref: /schemas/types.yaml#/definitions/uin
49 minItems: 1
50 maxItems: 32
51
52 additionalProperties: true
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