linux-kernel - Re: [PATCH v2, 1/3] dt-binding: gce: add gce header file for mt8192

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Date:   Sun, 31 Jan 2021 15:44:12 +0100
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Yongqiang Niu <yongqiang.niu@...iatek.com>,
        CK Hu <ck.hu@...iatek.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Mark Rutland <mark.rutland@....com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v2, 1/3] dt-binding: gce: add gce header file for mt8192



On 24/12/2020 01:48, Yongqiang Niu wrote:
> Add documentation for the mt8192 gce.
> 
> Add gce header file defined the gce hardware event,
> subsys number and constant for mt8192.
> 
> Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
> ---
>  .../devicetree/bindings/mailbox/mtk-gce.txt        |   7 +-
>  include/dt-bindings/gce/mt8192-gce.h               | 419 +++++++++++++++++++++
>  2 files changed, 423 insertions(+), 3 deletions(-)
>  create mode 100644 include/dt-bindings/gce/mt8192-gce.h
> 
> diff --git a/Documentation/devicetree/bindings/mailbox/mtk-gce.txt b/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
> index cf48cd8..f48ae45 100644
> --- a/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
> +++ b/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
> @@ -9,8 +9,8 @@ CMDQ driver uses mailbox framework for communication. Please refer to
>  mailbox.txt for generic information about mailbox device-tree bindings.
>  
>  Required properties:
> -- compatible: can be "mediatek,mt8173-gce", "mediatek,mt8183-gce" or
> -  "mediatek,mt6779-gce".
> +- compatible: can be "mediatek,mt8173-gce", "mediatek,mt8183-gce",
> +  "mediatek,mt8192-gce" or "mediatek,mt6779-gce".
>  - reg: Address range of the GCE unit
>  - interrupts: The interrupt signal from the GCE block
>  - clock: Clocks according to the common clock binding
> @@ -36,7 +36,8 @@ Optional properties for a client device:
>    size: the total size of register address that GCE can access.
>  
>  Some vaules of properties are defined in 'dt-bindings/gce/mt8173-gce.h',
> -'dt-binding/gce/mt8183-gce.h' or 'dt-bindings/gce/mt6779-gce.h'. Such as
> +'dt-binding/gce/mt8183-gce.h', 'dt-binding/gce/mt8192-gce.h' or
> +'dt-bindings/gce/mt6779-gce.h'. Such as
>  sub-system ids, thread priority, event ids.
>  
>  Example:
> diff --git a/include/dt-bindings/gce/mt8192-gce.h b/include/dt-bindings/gce/mt8192-gce.h
> new file mode 100644
> index 0000000..0627544
> --- /dev/null
> +++ b/include/dt-bindings/gce/mt8192-gce.h
> @@ -0,0 +1,419 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (c) 2020 MediaTek Inc.
> + * Author: Yongqiang Niu <yongqiang.niu@...iatek.com>
> + */
> +
> +#ifndef _DT_BINDINGS_GCE_MT8192_H
> +#define _DT_BINDINGS_GCE_MT8192_H
> +
> +/* assign timeout 0 also means default */
> +#define CMDQ_NO_TIMEOUT		0xffffffff
> +#define CMDQ_TIMEOUT_DEFAULT	1000
> +
> +/* GCE thread priority */
> +#define CMDQ_THR_PRIO_LOWEST	0
> +#define CMDQ_THR_PRIO_1		1
> +#define CMDQ_THR_PRIO_2		2
> +#define CMDQ_THR_PRIO_3		3
> +#define CMDQ_THR_PRIO_4		4
> +#define CMDQ_THR_PRIO_5		5
> +#define CMDQ_THR_PRIO_6		6
> +#define CMDQ_THR_PRIO_HIGHEST	7
> +
> +/* CPR count in 32bit register */
> +#define GCE_CPR_COUNT		1312
> +
> +/* GCE subsys table */
> +#define SUBSYS_1300XXXX		0
> +#define SUBSYS_1400XXXX		1
> +#define SUBSYS_1401XXXX		2
> +#define SUBSYS_1402XXXX		3
> +#define SUBSYS_1502XXXX		4
> +#define SUBSYS_1880XXXX		5
> +#define SUBSYS_1881XXXX		6
> +#define SUBSYS_1882XXXX		7
> +#define SUBSYS_1883XXXX		8
> +#define SUBSYS_1884XXXX		9
> +#define SUBSYS_1000XXXX		10
> +#define SUBSYS_1001XXXX		11
> +#define SUBSYS_1002XXXX		12
> +#define SUBSYS_1003XXXX		13
> +#define SUBSYS_1004XXXX		14
> +#define SUBSYS_1005XXXX		15
> +#define SUBSYS_1020XXXX		16
> +#define SUBSYS_1028XXXX		17
> +#define SUBSYS_1700XXXX		18
> +#define SUBSYS_1701XXXX		19
> +#define SUBSYS_1702XXXX		20
> +#define SUBSYS_1703XXXX		21
> +#define SUBSYS_1800XXXX		22
> +#define SUBSYS_1801XXXX		23
> +#define SUBSYS_1802XXXX		24
> +#define SUBSYS_1804XXXX		25
> +#define SUBSYS_1805XXXX		26
> +#define SUBSYS_1808XXXX		27
> +#define SUBSYS_180aXXXX		28
> +#define SUBSYS_180bXXXX		29
> +#define SUBSYS_NO_SUPPORT	99

How will we you SUBSYS_NO_SUPPORT?

> +
> +/* GCE General Purpose Register (GPR) support
> + * Leave note for scenario usage here
> + */
> +/* GCE: write mask */
> +#define GCE_GPR_R00		0x00

What are these defines for?

Regards,
Matthias

> +#define GCE_GPR_R01		0x01
> +/* MDP: P1: JPEG dest */
> +#define GCE_GPR_R02		0x02
> +#define GCE_GPR_R03		0x03
> +/* MDP: PQ color */
> +#define GCE_GPR_R04		0x04
> +/* MDP: 2D sharpness */
> +#define GCE_GPR_R05		0x05
> +/* DISP: poll esd */
> +#define GCE_GPR_R06		0x06
> +#define GCE_GPR_R07		0x07
> +/* MDP: P4: 2D sharpness dst */
> +#define GCE_GPR_R08		0x08
> +#define GCE_GPR_R09		0x09
> +/* VCU: poll with timeout for GPR timer */
> +#define GCE_GPR_R10		0x0A
> +#define GCE_GPR_R11		0x0B
> +/* CMDQ: debug */
> +#define GCE_GPR_R12		0x0C
> +#define GCE_GPR_R13		0x0D
> +/* CMDQ: P7: debug */
> +#define GCE_GPR_R14		0x0E
> +#define GCE_GPR_R15		0x0F
> +