From: Marc Gonzalez <marc.w.gonzalez@free.fr> To: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>, Jeffrey Hugo <jeffrey.l.hugo@gmail.com>, Bjorn Andersson <bjorn.andersson@linaro.org>, Linux ARM <linux-arm-kernel@lists.infradead.org>, MSM <linux-arm-msm@vger.kernel.org> Subject: Re: [PATCHv9 2/3] arm64: dts: qcom: msm8998: Add Coresight support Date: Wed, 2 Oct 2019 17:21:23 +0200 [thread overview] Message-ID: <585ee38c-39d1-47df-78b7-f4b670f17a25@free.fr> (raw) In-Reply-To: <CANLsYkxPOOorqcnPrbhZLzGV9Y7EGWUUyxvi-Cm5xxnzhx=Ecg@mail.gmail.com> On 02/10/2019 17:03, Mathieu Poirier wrote: > The problem here is that a debug and production device are using the > same device tree, i.e msm8998.dtsi. Disabling coresight devices in > the DTS file will allow the laptop to boot but completely disabled > coresight blocks on the MTP board. Leaving things as is breaks the > laptop but allows coresight to be used on the MTP board. One of three > things can happen: > > 1) Nothing gets done and production board can't boot without DTS modifications. > 2) Disable tags are added to the DTS file and the debug board can't > use coresight without modifications. > 2) The handling of the debug power domain is done properly on the > MSM8998 rather than relying on the bootloader to enable it. > 3) The DTS file is split or reorganised to account for debug/production devices. I believe 3) is already the de facto situation. arch/arm64/boot/dts/qcom/msm8998.dtsi is the "base" config. arch/arm64/boot/dts/qcom/msm8998-mtp.dtsi for the MTP board. arch/arm64/boot/dts/qcom/msm8998-clamshell.dtsi for the laptops. > Which of the above ends up being the final solution is entirely up to > David and Andy. 2498f8c1c668 ;-) Regards.
WARNING: multiple messages have this Message-ID (diff)
From: Marc Gonzalez <marc.w.gonzalez@free.fr> To: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: MSM <linux-arm-msm@vger.kernel.org>, Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>, Bjorn Andersson <bjorn.andersson@linaro.org>, Linux ARM <linux-arm-kernel@lists.infradead.org>, Jeffrey Hugo <jeffrey.l.hugo@gmail.com> Subject: Re: [PATCHv9 2/3] arm64: dts: qcom: msm8998: Add Coresight support Date: Wed, 2 Oct 2019 17:21:23 +0200 [thread overview] Message-ID: <585ee38c-39d1-47df-78b7-f4b670f17a25@free.fr> (raw) In-Reply-To: <CANLsYkxPOOorqcnPrbhZLzGV9Y7EGWUUyxvi-Cm5xxnzhx=Ecg@mail.gmail.com> On 02/10/2019 17:03, Mathieu Poirier wrote: > The problem here is that a debug and production device are using the > same device tree, i.e msm8998.dtsi. Disabling coresight devices in > the DTS file will allow the laptop to boot but completely disabled > coresight blocks on the MTP board. Leaving things as is breaks the > laptop but allows coresight to be used on the MTP board. One of three > things can happen: > > 1) Nothing gets done and production board can't boot without DTS modifications. > 2) Disable tags are added to the DTS file and the debug board can't > use coresight without modifications. > 2) The handling of the debug power domain is done properly on the > MSM8998 rather than relying on the bootloader to enable it. > 3) The DTS file is split or reorganised to account for debug/production devices. I believe 3) is already the de facto situation. arch/arm64/boot/dts/qcom/msm8998.dtsi is the "base" config. arch/arm64/boot/dts/qcom/msm8998-mtp.dtsi for the MTP board. arch/arm64/boot/dts/qcom/msm8998-clamshell.dtsi for the laptops. > Which of the above ends up being the final solution is entirely up to > David and Andy. 2498f8c1c668 ;-) Regards. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-10-02 15:21 UTC|newest] Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-07-31 5:57 [PATCHv9 0/3] Add coresight support for SDM845, MSM8998 and MSM8996 Sai Prakash Ranjan 2019-07-31 5:57 ` Sai Prakash Ranjan 2019-07-31 5:58 ` [PATCHv9 1/3] arm64: dts: qcom: sdm845: Add Coresight support Sai Prakash Ranjan 2019-07-31 5:58 ` Sai Prakash Ranjan 2019-07-31 6:05 ` Sai Prakash Ranjan 2019-07-31 6:05 ` Sai Prakash Ranjan 2019-08-07 10:08 ` Sai Prakash Ranjan 2019-08-07 10:08 ` Sai Prakash Ranjan 2019-08-07 10:12 ` Suzuki K Poulose 2019-08-07 10:12 ` Suzuki K Poulose 2019-08-07 11:16 ` Sai Prakash Ranjan 2019-08-07 11:16 ` Sai Prakash Ranjan 2019-07-31 5:58 ` [PATCHv9 2/3] arm64: dts: qcom: msm8998: " Sai Prakash Ranjan 2019-07-31 5:58 ` Sai Prakash Ranjan 2019-10-01 16:13 ` Jeffrey Hugo 2019-10-01 16:13 ` Jeffrey Hugo 2019-10-01 17:04 ` Sai Prakash Ranjan 2019-10-01 17:04 ` Sai Prakash Ranjan 2019-10-01 17:14 ` Jeffrey Hugo 2019-10-01 17:14 ` Jeffrey Hugo 2019-10-01 17:31 ` Suzuki K Poulose 2019-10-01 17:31 ` Suzuki K Poulose 2019-10-01 17:52 ` Sai Prakash Ranjan 2019-10-01 17:52 ` Sai Prakash Ranjan 2019-10-01 18:01 ` Jeffrey Hugo 2019-10-01 18:01 ` Jeffrey Hugo 2019-10-01 18:05 ` Sai Prakash Ranjan 2019-10-01 18:05 ` Sai Prakash Ranjan 2019-10-02 15:03 ` Mathieu Poirier 2019-10-02 15:03 ` Mathieu Poirier 2019-10-02 15:21 ` Marc Gonzalez [this message] 2019-10-02 15:21 ` Marc Gonzalez 2019-10-02 15:34 ` Mathieu Poirier 2019-10-02 15:34 ` Mathieu Poirier 2019-10-02 15:49 ` Jeffrey Hugo 2019-10-02 15:49 ` Jeffrey Hugo 2019-10-03 10:20 ` Daniel Thompson 2019-10-03 10:20 ` Daniel Thompson 2019-10-03 10:52 ` Suzuki K Poulose 2019-10-03 10:52 ` Suzuki K Poulose 2019-10-03 12:52 ` Daniel Thompson 2019-10-03 12:52 ` Daniel Thompson 2019-07-31 5:58 ` [PATCHv9 3/3] arm64: dts: qcom: msm8996: " Sai Prakash Ranjan 2019-07-31 5:58 ` Sai Prakash Ranjan
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