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Message-ID: <d827dafb-5b97-7ba3-542c-e3f60d4fb468@linaro.org>
Date:   Sun, 26 Mar 2023 10:51:56 +0200
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Subject: Re: [PATCH 0/2] Qualcomm SDM845 SLPI DSP driver support
To:     Dylan Van Assche <me@dylanvanassche.be>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Mathieu Poirier <mathieu.poirier@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc:     Konrad Dybcio <konrad.dybcio@linaro.org>,
        Manivannan Sadhasivam <mani@kernel.org>,
        linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        ~postmarketos/upstreaming@lists.sr.ht, phone-devel@vger.kernel.org
References: <20230325132117.19733-1-me@dylanvanassche.be>
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From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <20230325132117.19733-1-me@dylanvanassche.be>
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On 25/03/2023 14:21, Dylan Van Assche wrote:
> The Qualcomm SDM845 SoC has a separate SLPI (Sensor Low Power Island)
> DSP for sensors connected to the SoC which is responsible for exposing
> sensors to userspace, power saving, and other features. 
> While sensors are connected to GPIOs of the SoC, they cannot be used
> because the hypervisor blocks direct access to the sensors, thus the 
> DSP must be used to access any sensor on this SoC. The SLPI DSP uses a
> GLink edge (dsps) to communicate with the host and has a FastRPC interface
> to load files from the host filesystem such as sensor configuration files.
> The FastRPC interface does not use regular FastRPC Compute Banks
> but instead uses an allocated CMA region through which communication happens.
> 
> This set of patches adds support to drivers for the SLPI DSP:
> 1. Configure the permissions of assigned DSP memory through the hypervisor.
> 2. Allocate a remote heap when the FastRPC session ID is 0 instead of using 
> a Compute Bank directly.
> 3. Add the SLPI remoteproc resource to the q6v5_pas driver to enable support
> for it in the driver.
> over QRTR.
> 
> DTS changes to enable the SLPI DSP in the SDM845 DTS and hardware
> e.g. Oneplus 6 and SHIFTPHONES SHIFT6mq will be send once the driver changes
> are applied.

No, as we explained on IRC, we expect DTS to be sent the same time.

Best regards,
Krzysztof