linux-kernel - Re: [PATCH v5 0/8] Enable ili9341 and l3gd20 on stm32f429-disco

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Message-ID: <CAL9mu0L3ZF5+nh2ENzxnu0f6AAh1ygoWx1bEkS3WkJt8TN7C7Q@mail.gmail.com>
Date:   Tue, 21 Jul 2020 18:39:16 +0800
From:   dillon min <dillon.minfei@...il.com>
To:     Alexandre Torgue <alexandre.torgue@...com>
Cc:     Rob Herring <robh+dt@...nel.org>, p.zabel@...gutronix.de,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        thierry.reding@...il.com, Sam Ravnborg <sam@...nborg.org>,
        Dave Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-spi <linux-spi@...r.kernel.org>,
        linux-stm32@...md-mailman.stormreply.com,
        "open list:DRM PANEL DRIVERS" <dri-devel@...ts.freedesktop.org>,
        linux-clk <linux-clk@...r.kernel.org>
Subject: Re: [PATCH v5 0/8] Enable ili9341 and l3gd20 on stm32f429-disco

Hi Alexandre,

On Tue, Jul 21, 2020 at 5:19 PM Alexandre Torgue
<alexandre.torgue@...com> wrote:
>
> Hi Dillon
>
> On 5/25/20 5:40 AM, dillon.minfei@...il.com wrote:
> > From: dillon min <dillon.minfei@...il.com>
> >
> > V5's update based on Mark Brown's suggestion, use 'SPI_MASTER_MUST_RX'
> > for SPI_SIMPLEX_RX mode on stm32 spi controller.
> >
> > V5:
> > 1 instead of add send dummy data out under SIMPLEX_RX mode,
> >     add flags 'SPI_CONTROLLER_MUST_TX' for stm32 spi driver
> > 2 bypass 'SPI_CONTROLLER_MUST_TX' and 'SPI_CONTROLLER_MUST_RX' under
> > 'SPI_3WIRE' mode
> >
>
> Concerning DT patches, they look goods for me. However I'll merge them
> when drivers parts will be merged.
>
> regards
> Alex
This patchset status is :
dts:
    ARM: dts: stm32: Add dma config for spi5
    ARM: dts: stm32: Add pin map for ltdc & spi5 on stm32f429-disco board
    ARM: dts: stm32: enable ltdc binding with ili9341, gyro l3gd20 on
      stm32429-disco board

panel-bindings: Reviewed-by: Rob Herring， need more reviewing to merge
    dt-bindings: display: panel: Add ilitek ili9341 panel bindings

clk: Acked-by: Stephen Boyd , need more reviewing to merge
    clk: stm32: Fix stm32f429's ltdc driver hang in set clock rate,
      fix duplicated ltdc clock register to 'clk_core' case ltdc's clock
        turn off by clk_disable_unused()

drm-panel:  Reviewed-by: Linus Walleij . need more reviewing to merge
    drm/panel: Add ilitek ili9341 panel driver

spi-driver: Acked-by: Mark Brown ，merged into mainline
    spi: stm32: Add 'SPI_SIMPLEX_RX', 'SPI_3WIRE_RX' support for stm32f4
    spi: flags 'SPI_CONTROLLER_MUST_RX' and 'SPI_CONTROLLER_MUST_TX' can't
      becoexit with 'SPI_3WIRE' mode

For ili9341 drivers, it seems to need more time to review, or might be dropped.
since the drm maintainer might create a new interface to support
DPI,DBI,DSI in one driver.
Currently it's under discussion. I will rework the ili9341 driver after that.

But, we can use the existing "drivers/gpu/drm/tiny/ili9341.c" driver to support
ili9341 on stm32f429-disco board only using the spi bus. except the
display refresh performance is not as good as the ltdc interface.

I can submit a new patch just with dts changed this week for it, if you need.

Thanks,
Dillon.
>
>
>
> > V4:
> > According to alexandre torgue's suggestion, combine ili9341 and
> > l3gd20's modification on stm32f429-disco board to one patchset.
> >
> > Changes:
> >
> > ili9341:
> >
> > 1 update ili9341 panel driver according to Linus's suggestion
> > 2 drop V1's No.5 patch, sumbit new changes for clk-stm32f4
> > 3 merge l3gd20's change to this patchset
> >
> > V3:
> > 1 merge original tiny/ili9341.c driver to panel/panel-ilitek-ili9341.c
> >    to support serial spi & parallel rgb interface in one driver.
> > 2 update ilitek,ili9341.yaml dts binding documentation.
> > 3 update stm32f429-disco dts binding
> >
> > V2:
> > 1 verify ilitek,ili9341.yaml with make O=../linux-stm32
> >    dt_binding_check
> >    DT_SCHEMA_FILES=Documentation/devicetree/bindings/display/panel/
> >    ilitek,ili9341.yaml
> >
> > V1:
> > 1 add ili9341 drm panel driver
> > 2 add ltdc, spi5 controller for stm32f429-disco
> > 3 add ltdc, spi5 pin map for stm32f429-disco
> > 4 add docs about ili9341
> > 5 fix ltdc driver loading hang in clk set rate bug
> >
> >
> > L3gd20:
> > V3:
> > 1 merge stm32f429-disco dtbs binding with ili9341 part
> >
> > V2:
> > 1 insert blank line at stm32f420-disco.dts line 143
> > 2 add more description for l3gd20 in commit message
> >
> > V1:
> > 1 enable spi5 controller on stm32f429-disco (dts)
> > 2 add spi5 pinmap for stm32f429-disco  (dts)
> > 3 add SPI_SIMPLEX_RX, SPI_3WIRE_RX support for stm32f4
> >
> >
> > dillon min (8):
> >    ARM: dts: stm32: Add dma config for spi5
> >    ARM: dts: stm32: Add pin map for ltdc & spi5 on stm32f429-disco board
> >    ARM: dts: stm32: enable ltdc binding with ili9341, gyro l3gd20 on
> >      stm32429-disco board
> >    dt-bindings: display: panel: Add ilitek ili9341 panel bindings
> >    clk: stm32: Fix stm32f429's ltdc driver hang in set clock rate,
> >      fix duplicated ltdc clock register to 'clk_core' case ltdc's clock
> >        turn off by clk_disable_unused()
> >    drm/panel: Add ilitek ili9341 panel driver
> >    spi: stm32: Add 'SPI_SIMPLEX_RX', 'SPI_3WIRE_RX' support for stm32f4
> >    spi: flags 'SPI_CONTROLLER_MUST_RX' and 'SPI_CONTROLLER_MUST_TX' can't
> >      be     coexit with 'SPI_3WIRE' mode
> >
> >   .../bindings/display/panel/ilitek,ili9341.yaml     |   69 ++
> >   arch/arm/boot/dts/stm32f4-pinctrl.dtsi             |   67 +
> >   arch/arm/boot/dts/stm32f429-disco.dts              |   48 +
> >   arch/arm/boot/dts/stm32f429.dtsi                   |    3 +
> >   drivers/clk/clk-stm32f4.c                          |    7 +-
> >   drivers/gpu/drm/panel/Kconfig                      |   12 +
> >   drivers/gpu/drm/panel/Makefile                     |    1 +
> >   drivers/gpu/drm/panel/panel-ilitek-ili9341.c       | 1301 ++++++++++++++++++++
> >   drivers/spi/spi-stm32.c                            |   19 +-
> >   drivers/spi/spi.c                                  |    3 +-
> >   10 files changed, 1521 insertions(+), 9 deletions(-)
> >   create mode 100644 Documentation/devicetree/bindings/display/panel/ilitek,ili9341.yaml
> >   create mode 100644 drivers/gpu/drm/panel/panel-ilitek-ili9341.c
> >