linux-kernel - Re: [PATCH V4 0/7] imx: blk-ctrl: Add interconnect for i.MX8MP

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Date:   Thu, 13 Oct 2022 23:49:25 +0200
From:   Lucas Stach <l.stach@...gutronix.de>
To:     Tim Harvey <tharvey@...eworks.com>, Marek Vasut <marex@...x.de>
Cc:     "Peng Fan (OSS)" <peng.fan@....nxp.com>, djakov@...nel.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, festevam@...il.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        abelvesa@...nel.org, abailon@...libre.com,
        laurent.pinchart@...asonboard.com, paul.elder@...asonboard.com,
        Markus.Niebel@...tq-group.com, aford173@...il.com,
        kernel@...gutronix.de, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-imx@....com,
        Peng Fan <peng.fan@....com>
Subject: Re: [PATCH V4 0/7] imx: blk-ctrl: Add interconnect for i.MX8MP

Hi Tim,

Am Donnerstag, dem 13.10.2022 um 11:23 -0700 schrieb Tim Harvey:
> On Wed, Oct 12, 2022 at 11:46 AM Tim Harvey <tharvey@...eworks.com> wrote:
> > 
> > On Tue, Oct 11, 2022 at 4:13 PM Marek Vasut <marex@...x.de> wrote:
> > > 
> > > On 10/11/22 22:10, Tim Harvey wrote:
> > > > On Fri, Jul 8, 2022 at 1:57 AM Peng Fan (OSS) <peng.fan@....nxp.com> wrote:
> > > > > 
> > > > > From: Peng Fan <peng.fan@....com>
> > > > > 
> > > > > V4:
> > > > >   Because the header is not included when adding NoC node, the fsl,imx8mp.h
> > > > >   needs be included in this patchset. So include it in patch 6
> > > > > 
> > > > > V3:
> > > > >   Move adding NoC node patch to i.MX8MP ICC driver patchset
> > > > >   Per Lucas's comments, warn once when icc bulk get not return probe defer and continue.
> > > > > 
> > > > > V2:
> > > > >   Use a low bandwidth value instead INT_MAX
> > > > >   Minor fix to move fsl,imx8mp.h out to dts patch, not driver patch
> > > > >   Add A-b tag from DT maintainer
> > > > > 
> > > > > i.MX8MP NoC settings is invalid after related power domain up. So
> > > > > need to set valid values after power domain up.
> > > > > 
> > > > > This patchset is to bind interconnect for each entry in blk ctrl.
> > > > > 
> > > > > This patchset is not include DVFS DDRC feature.
> > > > > 
> > > > > Peng Fan (7):
> > > > >    dt-bindings: soc: imx: add interconnect property for i.MX8MP media blk
> > > > >      ctrl
> > > > >    dt-bindings: soc: imx: add interconnect property for i.MX8MP hdmi blk
> > > > >      ctrl
> > > > >    dt-bindings: soc: imx: add interconnect property for i.MX8MP hsio blk
> > > > >      ctrl
> > > > >    soc: imx: add icc paths for i.MX8MP media blk ctrl
> > > > >    soc: imx: add icc paths for i.MX8MP hsio/hdmi blk ctrl
> > > > >    arm64: dts: imx8mp: add interconnects for media blk ctrl
> > > > >    arm64: dts: imx8mp: add interconnect for hsio blk ctrl
> > > > > 
> > > > >   .../soc/imx/fsl,imx8mp-hdmi-blk-ctrl.yaml     |  9 +++++
> > > > >   .../soc/imx/fsl,imx8mp-hsio-blk-ctrl.yaml     | 10 +++++
> > > > >   .../soc/imx/fsl,imx8mp-media-blk-ctrl.yaml    | 14 +++++++
> > > > >   arch/arm64/boot/dts/freescale/imx8mp.dtsi     | 18 +++++++++
> > > > >   drivers/soc/imx/imx8m-blk-ctrl.c              | 39 +++++++++++++++++++
> > > > >   drivers/soc/imx/imx8mp-blk-ctrl.c             | 35 +++++++++++++++++
> > > > >   6 files changed, 125 insertions(+)
> > > > > 
> > > > > --
> > > > > 2.25.1
> > > > > 
> > > > 
> > > > Hi Peng,
> > > > 
> > > > I built origin/master from commit 041bc24d867a today for an imx8mp
> > > > board and am running into errors that appear to be introduced by this
> > > > series:
> > > > [   15.177372] platform 381f0040.usb-phy: deferred probe pending
> > > > [   15.183155] platform 382f0040.usb-phy: deferred probe pending
> > > > [   15.188928] platform 33800000.pcie: deferred probe pending
> > > > [   15.194439] platform 32ec0000.blk-ctrl: deferred probe pending
> > > > [   15.200287] platform 38330000.blk-ctrl: deferred probe pending
> > > > [   15.206129] platform 32f10000.blk-ctrl: deferred probe pending
> > > > [   15.211974] platform 32f10100.usb: deferred probe pending
> > > > [   15.217382] platform 32f10108.usb: deferred probe pending
> > > > [   15.222791] platform cpufreq-dt: deferred probe pending
> > > > # cat /sys/kernel/debug/devices_deferred
> > > > 381f0040.usb-phy        platform: supplier 32f10000.blk-ctrl not ready
> > > > 382f0040.usb-phy        platform: supplier 32f10000.blk-ctrl not ready
> > > > 33800000.pcie   platform: supplier 32f10000.blk-ctrl not ready
> > > > 32ec0000.blk-ctrl       imx8m-blk-ctrl: failed to get noc entries
> > > > 38330000.blk-ctrl       imx8m-blk-ctrl: failed to get noc entries
> > > > 32f10000.blk-ctrl       imx8mp-blk-ctrl: failed to get noc entries
> > > > 32f10100.usb    platform: supplier 32f10000.blk-ctrl not ready
> > > > 32f10108.usb    platform: supplier 32f10000.blk-ctrl not ready
> > > > cpufreq-dt
> > > > 
> > > > Is there a driver I'm perhaps missing that is needed now or are there
> > > > some patches that come from a different unmerged tree needed?
> > > 
> > > Do you have these enabled ?
> > > 
> > > CONFIG_INTERCONNECT_IMX8MM=y
> > > CONFIG_INTERCONNECT_IMX8MN=y
> > > CONFIG_INTERCONNECT_IMX8MQ=y
> > > CONFIG_INTERCONNECT_IMX8MP=y
> > 
> > Marek,
> > 
> > Yes, I have those as well as CONFIG_ARCH_NXP which appears new for 6.1 enabled.
> > 
> > Best Regards,
> > 
> > Tim
> 
> I see this issue on origin/master 1440f5760228 using
> arch/arm64/configs/defconfig.
> 
> It seems to me that the imx8m*_blk_ctrl_probe will all defer now until
> perhaps all the drivers using interconnects can probe, such as
> g1/lcdif etc?
> 
> Some added debugging shows me:
> [   14.951371] of_icc_bulk_get path lcdif-rd err=-517
> [   14.956205] devm_of_icc_bulk_get ret=-517
> [   14.960562] imx8m_blk_ctrl_probe failed -517
> [   14.967191] of_icc_bulk_get path g1 err=-517
> [   14.971487] devm_of_icc_bulk_get ret=-517
> [   14.975614] imx8m_blk_ctrl_probe failed -517
> [   14.982200] of_icc_bulk_get path usb1 err=-517
> [   14.986680] devm_of_icc_bulk_get ret=-517
> [   14.990709] imx8mp_blk_ctrl_probe 0:usb1
> [   14.994641] imx8mp_blk_ctrl_probe 1:usb2
> [   15.002086] platform 381f0040.usb-phy: deferred probe pending
> [   15.007875] platform 382f0040.usb-phy: deferred probe pending
> [   15.013636] platform 32f00000.pcie-phy: deferred probe pending
> [   15.019480] platform 33800000.pcie: deferred probe pending
> [   15.024975] platform 32ec0000.blk-ctrl: deferred probe pending
> [   15.030819] platform 38330000.blk-ctrl: deferred probe pending
> [   15.036662] platform 32f10000.blk-ctrl: deferred probe pending
> [   15.042503] platform 32f10100.usb: deferred probe pending
> [   15.047912] platform 32f10108.usb: deferred probe pending
> 
Do you have CONFIG_ARM_IMX_BUS_DEVFREQ enabled? This one will actually
instantiate the interconnect devices for the interconnect drivers to
hang onto. Once the interconnect is probed the blk-ctrl drivers should
probe. There is no dependency into leaf peripheral devices.

Regards,
Lucas