linux-kernel - Re: [Patch v1 01/10] memory: tegra: add interconnect support for DRAM scaling in Tegra234

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Date:   Wed, 21 Dec 2022 13:35:03 +0530
From:   Sumit Gupta <sumitg@...dia.com>
To:     Dmitry Osipenko <digetx@...il.com>, <treding@...dia.com>,
        <krzysztof.kozlowski@...aro.org>, <dmitry.osipenko@...labora.com>,
        <viresh.kumar@...aro.org>, <rafael@...nel.org>,
        <jonathanh@...dia.com>, <robh+dt@...nel.org>,
        <linux-kernel@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <linux-pm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        Sumit Gupta <sumitg@...dia.com>
CC:     <sanjayc@...dia.com>, <ksitaraman@...dia.com>, <ishah@...dia.com>,
        <bbasu@...dia.com>
Subject: Re: [Patch v1 01/10] memory: tegra: add interconnect support for DRAM
 scaling in Tegra234



On 20/12/22 23:37, Dmitry Osipenko wrote:
> External email: Use caution opening links or attachments
> 
> 
> 20.12.2022 19:02, Sumit Gupta пишет:
>> +#ifndef MEMORY_TEGRA_ICC_H
>> +#define MEMORY_TEGRA_ICC_H
>> +
>> +enum tegra_icc_client_type {
>> +     TEGRA_ICC_NONE,
>> +     TEGRA_ICC_NISO,
>> +     TEGRA_ICC_ISO_DISPLAY,
>> +     TEGRA_ICC_ISO_VI,
>> +     TEGRA_ICC_ISO_AUDIO,
>> +     TEGRA_ICC_ISO_VIFAL,
>> +};
> 
> You using only TEGRA_ICC_NISO and !TEGRA_ICC_NISO in the code.
> 
> include/soc/tegra/mc.h defines TAG_DEFAULT/ISO, please drop all these
> duplicated and unused "types" unless there is a good reason to keep them
> 

These type are used while defining clients in "tegra234_mc_clients[]" 
and its passed to BPMP-FW which has handling for each client type.

  kernel$ grep -B2 ".type = TEGRA_ICC_ISO" drivers/memory/tegra/tegra234.c
      .name = "hdar",
      .bpmp_id = TEGRA_ICC_BPMP_HDA,
      .type = TEGRA_ICC_ISO_AUDIO,
  --
      .name = "hdaw",
      .bpmp_id = TEGRA_ICC_BPMP_HDA,
      .type = TEGRA_ICC_ISO_AUDIO,
  --
      .name = "vi2w",
      .bpmp_id = TEGRA_ICC_BPMP_VI2,
      .type = TEGRA_ICC_ISO_VI,
  --
      .name = "vi2falr",
      .bpmp_id = TEGRA_ICC_BPMP_VI2FAL,
      .type = TEGRA_ICC_ISO_VIFAL,
  --
      .name = "vi2falw",
      .bpmp_id = TEGRA_ICC_BPMP_VI2FAL,
      .type = TEGRA_ICC_ISO_VIFAL,
  --
      .name = "aper",
      .bpmp_id = TEGRA_ICC_BPMP_APE,
      .type = TEGRA_ICC_ISO_AUDIO,
  --
      .name = "apew",
      .bpmp_id = TEGRA_ICC_BPMP_APE,
      .type = TEGRA_ICC_ISO_AUDIO,
  --
      .name = "nvdisplayr",
      .bpmp_id = TEGRA_ICC_BPMP_DISPLAY,
      .type = TEGRA_ICC_ISO_DISPLAY,
  --
      .name = "nvdisplayr1",
      .bpmp_id = TEGRA_ICC_BPMP_DISPLAY,
      .type = TEGRA_ICC_ISO_DISPLAY,
  --
      .name = "apedmar",
      .bpmp_id = TEGRA_ICC_BPMP_APEDMA,
      .type = TEGRA_ICC_ISO_AUDIO,
  --
      .name = "apedmaw",
      .bpmp_id = TEGRA_ICC_BPMP_APEDMA,
      .type = TEGRA_ICC_ISO_AUDIO,