linux-kernel - Re: [PATCH v6 0/8] Initial support for Cadence MHDP8501(HDMI/DP) for i.MX8MQ

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Message-ID: <4674185.5fSG56mABF@steina-w>
Date:   Fri, 16 Jun 2023 11:37:24 +0200
From:   Alexander Stein <alexander.stein@...tq-group.com>
To:     andrzej.hajda@...el.com, neil.armstrong@...aro.org,
        robert.foss@...aro.org, Laurent.pinchart@...asonboard.com,
        jonas@...boo.se, jernej.skrabec@...il.com, airlied@...il.com,
        daniel@...ll.ch, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, festevam@...il.com, vkoul@...nel.org,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-phy@...ts.infradead.org
Cc:     oliver.brown@....com, Sandor.yu@....com, linux-imx@....com,
        kernel@...gutronix.de, Sandor Yu <Sandor.yu@....com>
Subject: Re: [PATCH v6 0/8] Initial support for Cadence MHDP8501(HDMI/DP) for i.MX8MQ

Hi Sandor,

thanks for sending a new version of this driver.

Am Donnerstag, 15. Juni 2023, 03:38:10 CEST schrieb Sandor Yu:
> The patch set initial support for Cadence MHDP8501(HDMI/DP) DRM bridge
> drivers and Cadence HDP-TX PHY(HDMI/DP) drivers for Freescale i.MX8MQ.
> 
> The patch set compose of DRM bridge drivers and PHY drivers.

Using quick and dirty DT changes I was able to enable HDMI on imx8mq 
(TQMa8MQ).

Best regards,
Alexander

> Both of them need the followed two patches to pass build.
>   drm: bridge: Cadence: convert mailbox functions to macro functions
>   phy: Add HDMI configuration options
> 
> DRM bridges driver patches:
>   dt-bindings: display: bridge: Add Cadence MHDP8501 HDMI and DP
>   drm: bridge: Cadence: Add MHDP8501 DP driver
>   drm: bridge: Cadence: Add MHDP8501 HDMI driver
> 
> PHY driver patches:
>   dt-bindings: phy: Add Freescale iMX8MQ DP and HDMI PHY
>   phy: freescale: Add DisplayPort PHY driver for i.MX8MQ
>   phy: freescale: Add HDMI PHY driver for i.MX8MQ
> 
> v5->v6:
> HDMI/DP bridge driver
> - 8501 is the part number of Cadence MHDP on i.MX8MQ.
>   Use MHDP8501 to name hdmi/dp drivers and files.
> - Add compatible "fsl,imx8mq-mhdp8501-dp" for i.MX8MQ DP driver
> - Add compatible "fsl,imx8mq-mhdp8501-hdmi" for i.MX8MQ HDMI driver
> - Combine HDMI and DP dt-bindings into one file cdns,mhdp8501.yaml
> - Fix HDMI scrambling is not enable issue when driver working in 4Kp60
>   mode.
> - Add HDMI/DP PHY API mailbox protect.
> 
> HDMI/DP PHY driver:
> - Rename DP and HDMI PHY files and move to folder phy/freescale/
> - Remove properties num_lanes and link_rate from DP PHY driver.
> - Combine HDMI and DP dt-bindings into one file fsl,imx8mq-dp-hdmi-phy.yaml
> - Update compatible string to "fsl,imx8mq-dp-phy".
> - Update compatible string to "fsl,imx8mq-hdmi-phy".
> 
> v4->v5:
> - Drop "clk" suffix in clock name.
> - Add output port property in the example of hdmi/dp.
> 
> v3->v4:
> dt-bindings:
> - Correct dt-bindings coding style and address review comments.
> - Add apb_clk description.
> - Add output port for HDMI/DP connector
> PHY:
> - Alphabetically sorted in Kconfig and Makefile for DP and HDMI PHY
> - Remove unused registers define from HDMI and DP PHY drivers.
> - More description in phy_hdmi.h.
> - Add apb_clk to HDMI and DP phy driver.
> HDMI/DP:
> - Use get_unaligned_le32() to replace hardcode type conversion
>   in HDMI AVI infoframe data fill function.
> - Add mailbox mutex lock in HDMI/DP driver for phy functions
>   to reslove race conditions between HDMI/DP and PHY drivers.
> - Add apb_clk to both HDMI and DP driver.
> - Rename some function names and add prefix with "cdns_hdmi/cdns_dp".
> - Remove bpc 12 and 16 optional that not supported.
> 
> v2->v3:
> Address comments for dt-bindings files.
> - Correct dts-bindings file names
>   Rename phy-cadence-hdptx-dp.yaml to cdns,mhdp-imx8mq-dp.yaml
>   Rename phy-cadence-hdptx-hdmi.yaml to cdns,mhdp-imx8mq-hdmi.yaml
> - Drop redundant words and descriptions.
> - Correct hdmi/dp node name.
> 
> v2 is a completely different version compared to v1.
> Previous v1 can be available here [1].
> 
> v1->v2:
> - Reuse Cadence mailbox access functions from mhdp8546 instead of
>   rockchip DP.
> - Mailbox access functions be convert to marco functions
>   that will be referenced by HDP-TX PHY(HDMI/DP) driver too.
> - Plain bridge instead of component driver.
> - Standalone Cadence HDP-TX PHY(HDMI/DP) driver.
> - Audio driver are removed from the patch set, it will be add in another
>   patch set later.
> 
> [1]
> https://patchwork.kernel.org/project/linux-rockchip/cover/cover.1590982881.
> git.Sandor.yu@....com/
> 
> Sandor Yu (8):
>   drm: bridge: Cadence: convert mailbox functions to macro functions
>   dt-bindings: display: bridge: Add Cadence MHDP8501 HDMI and DP
>   drm: bridge: Cadence: Add MHDP8501 DP driver
>   phy: Add HDMI configuration options
>   drm: bridge: Cadence: Add MHDP8501 HDMI driver
>   dt-bindings: phy: Add Freescale iMX8MQ DP and HDMI PHY
>   phy: freescale: Add DisplayPort PHY driver for i.MX8MQ
>   phy: freescale: Add HDMI PHY driver for i.MX8MQ
> 
>  .../display/bridge/cdns,mhdp8501.yaml         |  105 ++
>  .../bindings/phy/fsl,imx8mq-dp-hdmi-phy.yaml  |   53 +
>  drivers/gpu/drm/bridge/cadence/Kconfig        |   25 +
>  drivers/gpu/drm/bridge/cadence/Makefile       |    3 +
>  .../gpu/drm/bridge/cadence/cdns-mhdp8501-dp.c | 1078 +++++++++++++++++
>  .../drm/bridge/cadence/cdns-mhdp8501-hdmi.c   | 1024 ++++++++++++++++
>  .../gpu/drm/bridge/cadence/cdns-mhdp8501.h    |  399 ++++++
>  .../drm/bridge/cadence/cdns-mhdp8546-core.c   |  195 +--
>  .../drm/bridge/cadence/cdns-mhdp8546-core.h   |    1 -
>  drivers/phy/freescale/Kconfig                 |   18 +
>  drivers/phy/freescale/Makefile                |    2 +
>  drivers/phy/freescale/phy-fsl-imx8mq-dp.c     |  697 +++++++++++
>  drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c   |  889 ++++++++++++++
>  include/drm/bridge/cdns-mhdp-mailbox.h        |  240 ++++
>  include/linux/phy/phy-hdmi.h                  |   38 +
>  include/linux/phy/phy.h                       |    7 +-
>  16 files changed, 4578 insertions(+), 196 deletions(-)
>  create mode 100644
> Documentation/devicetree/bindings/display/bridge/cdns,mhdp8501.yaml create
> mode 100644
> Documentation/devicetree/bindings/phy/fsl,imx8mq-dp-hdmi-phy.yaml create
> mode 100644 drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-dp.c create mode
> 100644 drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-hdmi.c create mode
> 100644 drivers/gpu/drm/bridge/cadence/cdns-mhdp8501.h create mode 100644
> drivers/phy/freescale/phy-fsl-imx8mq-dp.c
>  create mode 100644 drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c
>  create mode 100644 include/drm/bridge/cdns-mhdp-mailbox.h
>  create mode 100644 include/linux/phy/phy-hdmi.h


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