linux-kernel - Re: [PATCH v1 1/1] soc: mediatek: add SMC fid table for SIP interface

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Date:   Mon, 11 Nov 2019 09:38:14 +0800
From:   Eason Yen <eason.yen@...iatek.com>
To:     Matthias Brugger <matthias.bgg@...il.com>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <wsd_upstream@...iatek.com>, <Eason.Yen@...iatek.com>
Subject: Re: [PATCH v1 1/1] soc: mediatek: add SMC fid table for SIP
 interface

Dear Matthias,

    This header files is used for mtk proprietary drivers.    
    MTK SIP call clients should define MTK_SIP_XXX with specific control
ID on this header file.
   
    mtk sip call example (sound card driver):
    arm_smccc_smc(MTK_SIP_AUDIO_CONTROL,  /* specific MTK_SIP_XXX id */
                  MTK_AUDIO_SMC_OP_DRAM_REQUEST,
                  0, 0, 0, 0, 0, 0, &res);

    Because sound card driver(mt6779) is still reviewing internally,
    I just upstream this header file first.

    I will remove change-id entry and upstream again soon.
    Thanks for your reviewing.


Regards,
Eason


On Sun, 2019-11-10 at 21:18 +0100, Matthias Brugger wrote:
> 
> On 28/10/2019 08:29, Eason Yen wrote:
> > 1. Add a header file to provide SIP interface to ATF
> > 2. Add AUDIO SMC fid
> > 
> > Change-Id: I218e9f571cea079268a5414725a81e9b35702e33
> 
> Please delete Change-Id entry.
> Apart from that, I don't really get the reason for this patch. Which driver is
> supposed to use this header file?
> 
> Please provide more background information.
> 
> Regards,
> Matthias
> 
> > Signed-off-by: Eason Yen <eason.yen@...iatek.com>
> > ---
> >  include/linux/soc/mediatek/mtk_sip_svc.h |   28 ++++++++++++++++++++++++++++
> >  1 file changed, 28 insertions(+)
> >  create mode 100644 include/linux/soc/mediatek/mtk_sip_svc.h
> > 
> > diff --git a/include/linux/soc/mediatek/mtk_sip_svc.h b/include/linux/soc/mediatek/mtk_sip_svc.h
> > new file mode 100644
> > index 0000000..00ee0f4
> > --- /dev/null
> > +++ b/include/linux/soc/mediatek/mtk_sip_svc.h
> > @@ -0,0 +1,28 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Copyright (c) 2019 MediaTek Inc.
> > + */
> > +
> > +#ifndef __MTK_SIP_SVC_H__
> > +#define __MTK_SIP_SVC_H__
> > +
> > +#include <linux/kernel.h>
> > +
> > +/* Error Code */
> > +#define SIP_SVC_E_SUCCESS               0
> > +#define SIP_SVC_E_NOT_SUPPORTED         -1
> > +#define SIP_SVC_E_INVALID_PARAMS        -2
> > +#define SIP_SVC_E_INVALID_Range         -3
> > +#define SIP_SVC_E_PERMISSION_DENY       -4
> > +
> > +#ifdef CONFIG_ARM64
> > +#define MTK_SIP_SMC_AARCH_BIT			0x40000000
> > +#else
> > +#define MTK_SIP_SMC_AARCH_BIT			0x00000000
> > +#endif
> > +
> > +/* AUDIO related SMC call */
> > +#define MTK_SIP_AUDIO_CONTROL \
> > +	(0x82000517 | MTK_SIP_SMC_AARCH_BIT)
> > +#endif
> > +/* __MTK_SIP_SVC_H__ */
> >