linux-kernel - Re: [PATCH v10 1/2] perf/amlogic: Add support for Amlogic meson G12 SoC DDR PMU driver

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Message-ID: <c2d96d4d-eb0b-afaf-3a44-23e48de4d40c@linaro.org>
Date:   Wed, 16 Nov 2022 10:12:05 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Jiucheng Xu <jiucheng.xu@...ogic.com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     Jonathan Corbet <corbet@....net>, Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Shuai Xue <xueshuai@...ux.alibaba.com>,
        John Garry <john.garry@...wei.com>,
        Wan Jiabing <wanjiabing@...o.com>,
        Chris Healy <cphealy@...il.com>,
        Jianxin Pan <jianxin.pan@...ogic.com>,
        Kelvin Zhang <kelvin.zhang@...ogic.com>,
        Chris Healy <healych@...on.com>
Subject: Re: [PATCH v10 1/2] perf/amlogic: Add support for Amlogic meson G12
 SoC DDR PMU driver

On 16/11/2022 01:31, Jiucheng Xu wrote:
> This patch adds support Amlogic meson G12 series SoC
> DDR bandwidth PMU driver framework and interfaces.
> 
> The PMU not only can monitor the total DDR bandwidth,
> but also the bandwidth which is from individual IP module.
> 
> Example usage:
> 
>   $ perf stat -a -e meson_ddr_bw/total_rw_bytes/ -I 1000 sleep 10
> 
> - or -
> 
>   $ perf stat -a -e \
>     meson_ddr_bw/total_rw_bytes/,\
>     meson_ddr_bw/chan_1_rw_bytes,arm=1/ -I 1000 \
>     sleep 10
> 
> g12 SoC support 4 channels to monitor DDR bandwidth
> simultaneously. Each channel can monitor up to 4 IP modules
> simultaneously.
> 
> For Instance, If you want to get the sum of DDR bandwidth
> from CPU, GPU, USB3.0 and VDEC. You can use the following
> command parameters to display.
> 
>   $ perf stat -a -e \
>     meson_ddr_bw/chan_2_rw_bytes,arm=1,gpu=1,usb3_0=1,nna=1/ -I 1000 \
>     sleep 10
> 
> Other events are supported, and advertised via perf list.
> 
> Signed-off-by: Jiucheng Xu <jiucheng.xu@...ogic.com>
> Tested-by: Chris Healy <healych@...on.com>
> ---

Why did you drop the bindings patch ?
I only applied the DT patch.

Neil