Linux-mmc Archive on lore.kernel.org
 help / color / Atom feed
From: Matthias Kaehlcke <mka@chromium.org>
To: Shaik Sajida Bhanu <sbhanu@codeaurora.org>
Cc: adrian.hunter@intel.com, ulf.hansson@linaro.org,
	robh+dt@kernel.org, linux-mmc@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	devicetree@vger.kernel.org, agross@kernel.org,
	bjorn.andersson@linaro.org, rnayak@codeaurora.org,
	Pradeep P V K <ppvk@codeaurora.org>
Subject: Re: [PATCH V2] arm64: dts: qcom: sc7180: Add bandwidth votes for eMMC and SDcard
Date: Fri, 24 Jul 2020 10:10:18 -0700
Message-ID: <20200724171018.GZ3191083@google.com> (raw)
In-Reply-To: <1595328381-29552-1-git-send-email-sbhanu@codeaurora.org>

Hi Shaik,

On Tue, Jul 21, 2020 at 04:16:21PM +0530, Shaik Sajida Bhanu wrote:
> From: Pradeep P V K <ppvk@codeaurora.org>
> 
> Add the bandwidth domain supporting performance state and
> the corresponding OPP tables for the sdhc device on sc7180.
> 
> Signed-off-by: Pradeep P V K <ppvk@codeaurora.org>
> Signed-off-by: Shaik Sajida Bhanu <sbhanu@codeaurora.org>
> ---
> 
> Changes since V1:
> 	- Incorporated review comments by Bjorn Andersson.
> ---
>  arch/arm64/boot/dts/qcom/sc7180.dtsi | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> index 68f9894..d78a066 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> @@ -684,6 +684,9 @@
>  			clocks = <&gcc GCC_SDCC1_APPS_CLK>,
>  					<&gcc GCC_SDCC1_AHB_CLK>;
>  			clock-names = "core", "iface";
> +			interconnects = <&aggre1_noc MASTER_EMMC &mc_virt SLAVE_EBI1>,
> +				<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_EMMC_CFG>;
> +			interconnect-names = "sdhc-ddr","cpu-sdhc";
>  			power-domains = <&rpmhpd SC7180_CX>;
>  			operating-points-v2 = <&sdhc1_opp_table>;
>  
> @@ -704,11 +707,15 @@
>  				opp-100000000 {
>  					opp-hz = /bits/ 64 <100000000>;
>  					required-opps = <&rpmhpd_opp_low_svs>;
> +					opp-peak-kBps = <100000 100000>;
> +					opp-avg-kBps = <100000 50000>;
>  				};
>  
>  				opp-384000000 {
>  					opp-hz = /bits/ 64 <384000000>;
>  					required-opps = <&rpmhpd_opp_svs_l1>;
> +					opp-peak-kBps = <600000 900000>;
> +					opp-avg-kBps = <261438 300000>;
>  				};
>  			};
>  		};
> @@ -2476,6 +2483,10 @@
>  			clocks = <&gcc GCC_SDCC2_APPS_CLK>,
>  					<&gcc GCC_SDCC2_AHB_CLK>;
>  			clock-names = "core", "iface";
> +
> +			interconnects = <&aggre1_noc MASTER_SDCC_2 &mc_virt SLAVE_EBI1>,
> +				<&gem_noc MASTER_APPSS_PROC &config_noc	SLAVE_SDCC_2>;
> +			interconnect-names = "sdhc-ddr","cpu-sdhc";
>  			power-domains = <&rpmhpd SC7180_CX>;
>  			operating-points-v2 = <&sdhc2_opp_table>;
>  
> @@ -2489,11 +2500,15 @@
>  				opp-100000000 {
>  					opp-hz = /bits/ 64 <100000000>;
>  					required-opps = <&rpmhpd_opp_low_svs>;
> +					opp-peak-kBps = <160000 100000>;
> +					opp-avg-kBps = <80000 50000>;
>  				};
>  
>  				opp-202000000 {
>  					opp-hz = /bits/ 64 <202000000>;
>  					required-opps = <&rpmhpd_opp_svs_l1>;
> +					opp-peak-kBps = <200000	120000>;
> +					opp-avg-kBps = <100000 60000>;
>  				};
>  			};
>  		};

Does the sdhci-msm driver actually have BW scaling support at this point?

There is commit 4ece9795be56 ("mmc: sdhci-msm: Add interconnect
bandwidth scaling support"), whose commit message says "make sure
interconnect driver is ready before handling interconnect scaling.".

I haven't seen any patch adding the scaling support (supposedly by
adding dev_pm_opp_set_bw() calls?). Did I miss it? If not it seems
it would make sense to post it in a series together with this patch,
as far as I can tell this patch alone does nothing in practical terms.

grep sdhc /sys/kernel/debug/interconnect/interconnect_summary
  8804000.sdhci                          0            0            0
  7c4000.sdhci                           0            0            0
  7c4000.sdhci                           0            0            0
  8804000.sdhci                          0            0            0
  ...

  reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-21 10:46 Shaik Sajida Bhanu
2020-07-24 17:10 ` Matthias Kaehlcke [this message]
2020-07-27  6:50   ` sbhanu
2020-07-27 19:10     ` Matthias Kaehlcke
2020-07-28 11:19       ` sbhanu
2020-08-11 17:08         ` Matthias Kaehlcke
2020-08-12 10:56           ` sbhanu
2020-08-12 15:15             ` Matthias Kaehlcke

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200724171018.GZ3191083@google.com \
    --to=mka@chromium.org \
    --cc=adrian.hunter@intel.com \
    --cc=agross@kernel.org \
    --cc=bjorn.andersson@linaro.org \
    --cc=devicetree@vger.kernel.org \
    --cc=linux-arm-msm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mmc@vger.kernel.org \
    --cc=ppvk@codeaurora.org \
    --cc=rnayak@codeaurora.org \
    --cc=robh+dt@kernel.org \
    --cc=sbhanu@codeaurora.org \
    --cc=ulf.hansson@linaro.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-mmc Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-mmc/0 linux-mmc/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-mmc linux-mmc/ https://lore.kernel.org/linux-mmc \
		linux-mmc@vger.kernel.org
	public-inbox-index linux-mmc

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-mmc


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git