[PATCH v4 00/20] drm: starfive: jh7110: Enable display subsystem

[Joshua Peisach]

On Thu Sep 17, 2026 at 1:22 PM EDT, Michal Wilczynski wrote:
>
>
> On 9/16/26 02:45, Joshua Peisach wrote:
>> On Tue Sep 15, 2026 at 11:32 AM EDT, Michal Wilczynski wrote:
>>>
>>> Testing
>>> =======
>>>
>>> Tested on a VisionFive 2 v1.3B using modetest.
>> 
>> I.. got nothing. I did have to manually modprobe the modules, but
>> unless I am doing something wrong.. I didn't get anything and modetest
>> just gave -2.
>
> Hmm have you also changed the DTB not just the kernel and the modules
> (you can also built in everything).
>
Yes (I didn't built-in everything, but I did make sure the DTB was
copied and flash-kernel was run)

> Also note modetest needs -M verisilicon.
>

"failed to open device 'versilicon' with busid '(null)': No such file
or directory"


> If that is not it, could you send "dmesg | grep -iE
> 'verisilicon|inno|hdmi|vout'" and "ls /sys/class/drm/"?
>
the dmesg output:

[    0.090950] /soc/display-subsystem at 29400000/hdmi at 29590000/controller: Fixed dependency cycle(s) with /soc/display-subsystem at 29400000/display at 29400000
[    0.091029] /soc/display-subsystem at 29400000/display at 29400000: Fixed dependency cycle(s) with /soc/display-subsystem at 29400000/hdmi at 29590000/controller
[    0.104227] /hdmi-connector: Fixed dependency cycle(s) with /soc/display-subsystem at 29400000/hdmi at 29590000/controller
[    0.104272] /soc/display-subsystem at 29400000/hdmi at 29590000/controller: Fixed dependency cycle(s) with /hdmi-connector


/sys/class/drm only contains the file "version"

-Josh

>> 
>>> ---
>>> Michal Wilczynski (20):
>>>       dt-bindings: phy: Add starfive,jh7110-inno-hdmi-phy
>>>       dt-bindings: display: bridge: Add starfive,jh7110-inno-hdmi-controller
>>>       dt-bindings: mfd: Add starfive,jh7110-hdmi-subsystem
>>>       dt-bindings: soc: starfive: Add starfive,jh7110-vout-syscon
>>>       dt-bindings: display: verisilicon: Add starfive,jh7110-dc8200
>>>       dt-bindings: soc: starfive: Add starfive,jh7110-vout-subsystem
>>>       drm/bridge: inno-hdmi: Split probe out of bind
>>>       drm/bridge: inno-hdmi: Allow the register map to come from a parent
>>>       drm/bridge: inno-hdmi: Add .disable platform operation
>>>       drm/bridge: inno-hdmi: Add .mode_valid platform operation
>>>       drm/bridge: inno-hdmi: Make the PHY configuration table optional
>>>       soc: starfive: Add jh7110-hdmi-subsystem driver
>>>       soc: starfive: Add jh7110-vout-subsystem driver
>>>       clk: starfive: jh7110-vout: Allow pixel clock rate propagation
>>>       drm/bridge: starfive: Add JH7110 HDMI controller driver
>>>       phy: Add common Innosilicon HDMI PHY helpers
>>>       phy: rockchip: inno-hdmi: Use the common Innosilicon PHY helpers
>>>       phy: starfive: Add jh7110-inno-hdmi-phy driver
>>>       riscv: dts: starfive: jh7110: Update DT for display subsystem
>>>       MAINTAINERS: Add StarFive JH7110 display subsystem entry
>>>
>>>  .../starfive,jh7110-inno-hdmi-controller.yaml      | 121 +++++
>>>  .../bindings/display/verisilicon,dc.yaml           |   1 +
>>>  .../mfd/starfive,jh7110-hdmi-subsystem.yaml        |  95 ++++
>>>  .../phy/starfive,jh7110-inno-hdmi-phy.yaml         |  49 ++
>>>  .../soc/starfive/starfive,jh7110-syscon.yaml       |   1 +
>>>  .../starfive/starfive,jh7110-vout-subsystem.yaml   | 218 ++++++++
>>>  MAINTAINERS                                        |  13 +
>>>  arch/riscv/boot/dts/starfive/jh7110-common.dtsi    | 121 ++++-
>>>  arch/riscv/boot/dts/starfive/jh7110.dtsi           | 105 +++-
>>>  drivers/clk/starfive/clk-starfive-jh7110-vout.c    |   6 +-
>>>  drivers/gpu/drm/bridge/Kconfig                     |  11 +
>>>  drivers/gpu/drm/bridge/Makefile                    |   1 +
>>>  drivers/gpu/drm/bridge/inno-hdmi.c                 | 112 +++-
>>>  drivers/gpu/drm/bridge/jh7110-inno-hdmi.c          | 297 +++++++++++
>>>  drivers/phy/Kconfig                                |   8 +
>>>  drivers/phy/Makefile                               |   1 +
>>>  drivers/phy/phy-inno-hdmi.c                        | 298 +++++++++++
>>>  drivers/phy/rockchip/Kconfig                       |   1 +
>>>  drivers/phy/rockchip/phy-rockchip-inno-hdmi.c      | 168 +-----
>>>  drivers/phy/starfive/Kconfig                       |  20 +
>>>  drivers/phy/starfive/Makefile                      |   1 +
>>>  drivers/phy/starfive/phy-jh7110-inno-hdmi.c        | 579 +++++++++++++++++++++
>>>  drivers/soc/Kconfig                                |   1 +
>>>  drivers/soc/Makefile                               |   1 +
>>>  drivers/soc/starfive/Kconfig                       |  43 ++
>>>  drivers/soc/starfive/Makefile                      |   3 +
>>>  drivers/soc/starfive/jh7110-hdmi-subsystem.c       |  73 +++
>>>  drivers/soc/starfive/jh7110-vout-subsystem.c       |  82 +++
>>>  include/drm/bridge/inno_hdmi.h                     |  10 +-
>>>  include/linux/phy/inno-hdmi-phy.h                  |  85 +++
>>>  30 files changed, 2337 insertions(+), 188 deletions(-)
>>> ---
>>> base-commit: fd73f4a6659897191fa0d40695fe370925dd3780
>>> change-id: 20251031-jh7110-clean-send-7d2242118026
>>>
>>> Best regards,
>> 
>> By the way, something weird happenined while I applied the patches
>> using git am. Somehow, some were out of order. The 10th patch
>> adding .mode_valid tried to be applied before .disable even though
>> in the series, the order is correctly set? git would obviously
>> fail because the .disable entry did not exist in the header, so I had
>> to manually put those in.
>> 
>> I guess it's possible that something went wrong here? I personally
>> pulled the mailbox from the lore.kernel.org mbox.gz file.
>
> I would recommend using b4 shazam instead
>
>> 
>
> Best regards,