| Message ID | 20240124011459.12204-2-jason-jh.lin@mediatek.com |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | Add mediatek,gce-props.yaml for other bindings reference | expand |
| Context | Check | Description |
|---|---|---|
| robh/checkpatch | success | |
| robh/patch-applied | success | |
| robh/dtbs-check | warning | build log |
| robh/dt-meta-schema | success |
Il 24/01/24 02:14, Jason-JH.Lin ha scritto: > Add mediatek,gce-props.yaml for common GCE properties that is used for > both mailbox providers and consumers. We place the common property > "mediatek,gce-events" in this binding currently. > > The property "mediatek,gce-events" is used for GCE event ID corresponding > to a hardware event signal sent by the hardware or a software driver. > If the mailbox providers or consumers want to manipulate the value of > the event ID, they need to know the specific event ID. > > Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com> > Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Hi Angelo, Jassi, Could you help me apply this series? Thanks! Regards, Jason-JH.Lin On Wed, 2024-01-24 at 09:57 +0100, AngeloGioacchino Del Regno wrote: > Il 24/01/24 02:14, Jason-JH.Lin ha scritto: > > Add mediatek,gce-props.yaml for common GCE properties that is used > > for > > both mailbox providers and consumers. We place the common property > > "mediatek,gce-events" in this binding currently. > > > > The property "mediatek,gce-events" is used for GCE event ID > > corresponding > > to a hardware event signal sent by the hardware or a software > > driver. > > If the mailbox providers or consumers want to manipulate the value > > of > > the event ID, they need to know the specific event ID. > > > > Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com> > > Reviewed-by: Conor Dooley <conor.dooley@microchip.com> > > Reviewed-by: AngeloGioacchino Del Regno < > angelogioacchino.delregno@collabora.com> >
Il 26/05/24 17:04, Jason-JH Lin (林睿祥) ha scritto: > Hi Angelo, Jassi, > > Could you help me apply this series? > Thanks! > That's not me, it's Jassi - green light from me, btw. Cheers, Angelo > Regards, > Jason-JH.Lin > > On Wed, 2024-01-24 at 09:57 +0100, AngeloGioacchino Del Regno wrote: >> Il 24/01/24 02:14, Jason-JH.Lin ha scritto: >>> Add mediatek,gce-props.yaml for common GCE properties that is used >>> for >>> both mailbox providers and consumers. We place the common property >>> "mediatek,gce-events" in this binding currently. >>> >>> The property "mediatek,gce-events" is used for GCE event ID >>> corresponding >>> to a hardware event signal sent by the hardware or a software >>> driver. >>> If the mailbox providers or consumers want to manipulate the value >>> of >>> the event ID, they need to know the specific event ID. >>> >>> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com> >>> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> >> >> Reviewed-by: AngeloGioacchino Del Regno < >> angelogioacchino.delregno@collabora.com> >> >
diff --git a/Documentation/devicetree/bindings/mailbox/mediatek,gce-props.yaml b/Documentation/devicetree/bindings/mailbox/mediatek,gce-props.yaml new file mode 100644 index 000000000000..c25eed4606fe --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/mediatek,gce-props.yaml @@ -0,0 +1,52 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mailbox/mediatek,gce-props.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MediaTek Global Command Engine Common Properties + +maintainers: + - Houlong Wei <houlong.wei@mediatek.com> + +description: + The Global Command Engine (GCE) is an instruction based, multi-threaded, + single-core command dispatcher for MediaTek hardware. The Command Queue + (CMDQ) mailbox driver is a driver for GCE, implemented using the Linux + mailbox framework. It is used to receive messages from mailbox consumers + and configure GCE to execute the specified instruction set in the message. + We use mediatek,gce-mailbox.yaml to define the properties for CMDQ mailbox + driver. A device driver that uses the CMDQ driver to configure its hardware + registers is a mailbox consumer. The mailbox consumer can request a mailbox + channel corresponding to a GCE hardware thread to send a message, specifying + that the GCE thread to configure its hardware. The mailbox provider can also + reserve a mailbox channel to configure GCE hardware register by the specific + GCE thread. This binding defines the common GCE properties for both mailbox + provider and consumers. + +properties: + mediatek,gce-events: + description: + GCE has an event table in SRAM, consisting of 1024 event IDs (0~1023). + Each event ID has a boolean event value with the default value 0. + The property mediatek,gce-events is used to obtain the event IDs. + Some gce-events are hardware-bound and cannot be changed by software. + For instance, in MT8195, when VDO0_MUTEX is stream done, VDO_MUTEX will + send an event signal to GCE, setting the value of event ID 597 to 1. + Similarly, in MT8188, the value of event ID 574 will be set to 1 when + VOD0_MUTEX is stream done. + On the other hand, some gce-events are not hardware-bound and can be + changed by software. For example, in MT8188, we can set the value of + event ID 855, which is not bound to any hardware, to 1 when the driver + in the secure world completes a task. However, in MT8195, event ID 855 + is already bound to VDEC_LAT1, so we need to select another event ID to + achieve the same purpose. This event ID can be any ID that is not bound + to any hardware and is not yet used in any software driver. + To determine if the event ID is bound to the hardware or used by a + software driver, refer to the GCE header + include/dt-bindings/gce/<chip>-gce.h of each chip. + $ref: /schemas/types.yaml#/definitions/uint32-array + minItems: 1 + maxItems: 32 + +additionalProperties: true