linux-kernel - Re: [Patch v8 1/8] memory: tegra: add interconnect support for DRAM scaling in Tegra234

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Message-ID: <226964d1-4c98-73a5-ccd1-6b718897fcc8@linaro.org>
Date:   Tue, 16 May 2023 09:42:22 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Sumit Gupta <sumitg@...dia.com>, treding@...dia.com,
        dmitry.osipenko@...labora.com, viresh.kumar@...aro.org,
        rafael@...nel.org, jonathanh@...dia.com, robh+dt@...nel.org,
        lpieralisi@...nel.org, helgaas@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-pci@...r.kernel.org, mmaddireddy@...dia.com, kw@...ux.com,
        bhelgaas@...gle.com, vidyas@...dia.com, sanjayc@...dia.com,
        ksitaraman@...dia.com, ishah@...dia.com, bbasu@...dia.com
Subject: Re: [Patch v8 1/8] memory: tegra: add interconnect support for DRAM
 scaling in Tegra234

On 11/05/2023 19:32, Sumit Gupta wrote:
> Add Interconnect framework support to dynamically set the DRAM
> bandwidth from different clients. Both the MC and EMC drivers are
> added as ICC providers. The path for any request is:
>  MC-Client[1-n] -> MC -> EMC -> EMEM/DRAM
> 
> MC client's request for bandwidth will go to the MC driver which
> passes the client request info like BPMP Client ID, Client type
> and the Bandwidth to the BPMP-FW. The final DRAM freq to achieve
> the requested bandwidth is set by the BPMP-FW based on the passed
> parameters.
> 
> Signed-off-by: Sumit Gupta <sumitg@...dia.com>
> ---
>  drivers/memory/tegra/mc.c           |   5 +
>  drivers/memory/tegra/tegra186-emc.c | 133 +++++++++++++++++++++++++++
>  drivers/memory/tegra/tegra234.c     | 138 +++++++++++++++++++++++++++-
>  include/linux/tegra-icc.h           |  65 +++++++++++++
>  include/soc/tegra/mc.h              |   7 ++

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Best regards,
Krzysztof