linux-kernel - Re: [PATCH V4 0/4] soc: imx: add i.MX BLK-CTL support

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Date:   Mon, 17 May 2021 09:28:52 +0200
From:   Frieder Schrempf <frieder.schrempf@...tron.de>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>, robh+dt@...nel.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de
Cc:     kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        p.zabel@...gutronix.de, l.stach@...gutronix.de, krzk@...nel.org,
        agx@...xcpu.org, marex@...x.de, andrew.smirnov@...il.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, ping.bai@....com, aford173@...il.com,
        abel.vesa@....com, Peng Fan <peng.fan@....com>
Subject: Re: [PATCH V4 0/4] soc: imx: add i.MX BLK-CTL support

On 10.05.21 06:07, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> V4:
>  Add R-b tag
>  Typo fix
>  Update the power domain macro names Per Abel and Frieder
> 
> V3:
>  Add explaination for not listing items in patch 2 commit log Per Rob.
>  Addressed comments from Lucas and Frieder on patch [3,4].
>  A few comments from Jacky was ignored, because following gpcv2
>  coding style.
> 
> V2:
>  Fix yaml check failure.
> 
> Previously there is an effort from Abel that take BLK-CTL as clock
> provider, but it turns out that there is A/B lock issue and we are
> not able resolve that.
> 
> Per discuss with Lucas and Jacky, we made an agreement that take BLK-CTL
> as a power domain provider and use GPC's domain as parent, the consumer
> node take BLK-CTL as power domain input.
> 
> This patchset has been tested on i.MX8MM EVK board, but one hack
> is not included in the patchset is that the DISPMIX BLK-CTL
> MIPI_M/S_RESET not implemented. Per Lucas, we will finally have a MIPI
> DPHY driver, so fine to leave it.
> 
> Thanks for Lucas's suggestion, Frieder Schrempf for collecting
> all the patches, Abel's previous BLK-CTL work, Jacky Bai on help
> debug issues.

I tested v3 of this patchset with our i.MX8MM hardware and additional patches for DSIM support:

Tested-by: Frieder Schrempf <frieder.schrempf@...tron.de>

> 
> 
> Peng Fan (4):
>   dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains
>   Documentation: bindings: clk: Add bindings for i.MX BLK_CTL
>   soc: imx: Add generic blk-ctl driver
>   soc: imx: Add blk-ctl driver for i.MX8MM
> 
>  .../bindings/soc/imx/fsl,imx-blk-ctl.yaml     |  66 ++++
>  drivers/soc/imx/Makefile                      |   2 +-
>  drivers/soc/imx/blk-ctl-imx8mm.c              | 138 ++++++++
>  drivers/soc/imx/blk-ctl.c                     | 307 ++++++++++++++++++
>  drivers/soc/imx/blk-ctl.h                     |  77 +++++
>  include/dt-bindings/power/imx8mm-power.h      |  11 +
>  6 files changed, 600 insertions(+), 1 deletion(-)
>  create mode 100644 Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml
>  create mode 100644 drivers/soc/imx/blk-ctl-imx8mm.c
>  create mode 100644 drivers/soc/imx/blk-ctl.c
>  create mode 100644 drivers/soc/imx/blk-ctl.h
>