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Message-ID: <ccb973b8-4b13-4a70-be48-06b2cbe0adf8@suse.de> Date: Thu, 5 Feb 2026 10:30:55 +0100 From: Thomas Zimmermann <tzimmermann@...e.de> To: Icenowy Zheng <zhengxingda@...as.ac.cn>, Andrzej Hajda <andrzej.hajda@...el.com>, Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, Laurent Pinchart <Laurent.pinchart@...asonboard.com>, Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Drew Fustini <fustini@...nel.org>, Guo Ren <guoren@...nel.org>, Fu Wei <wefu@...hat.com> Cc: Philipp Zabel <p.zabel@...gutronix.de>, Dmitry Baryshkov <lumag@...nel.org>, Michal Wilczynski <m.wilczynski@...sung.com>, Luca Ceresoli <luca.ceresoli@...tlin.com>, Han Gao <gaohan@...as.ac.cn>, Yao Zi <ziyao@...root.org>, linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org, Icenowy Zheng <uwu@...nowy.me> Subject: Re: [PATCH v7 0/8] Verisilicon DC8200 driver (and adaption to TH1520) Hi, patches 1 to 5 have been merged into drm-misc-next. In patch 3, I replaced COMPILER_TEST with COMPILE_TEST in the Kconfig file. Best regards Thomas Am 29.01.26 um 03:39 schrieb Icenowy Zheng: > This patchset tries to add a driver for Verisilicon DC8200 driver, and > demonstrates the driver on T-Head TH1520 with its HDMI output. > > This display controller IP is used on StarFive JH7110 too, but as the > HDMI controller used there isn't as common as the DesignWare one, I > choose to use TH1520 in this patchset. > > The DC driver is written with other DC-series (mainly DC8000, which is > known to be used on Eswin EIC7700 SoC) display controllers in mind, and > uses the identification registers available on all Vivante branded IPs. > A known exception is DCNano display controller, which is unlikely to be > supported by this driver because of totally different register map and > no known identification registers. (P.S. the in-tree loongson DRM driver > seems to be for some DCNano instances based on the register map.) > > The HDMI controller seems to come with some common PHY by Synopsys, the > DesignWare HDMI TX 2.0 PHY. By searching a few register names from the > BSP driver of that PHY, that PHY seems to be used by a in-tree dw-hdmi > glue, rcar_dw_hdmi -- an updated downstream version of rcar_dw_hdmi > contains all 6 registers set here in the th1520-dw-hdmi driver. Some > more suprising thing is that RK3288 uses the same PHY too, but the > in-tree dw_hdmi-rockchip driver writes the configuration data array in a > weird way to reuse the HDMI 3D TX PHY configuring function. It might be > valuable to add common configuring function and configuration data > definition for this HDMI 2.0 PHY too, but the current driver in this > patchset simply duplicated most configuration logic from rcar_dw_hdmi > driver (but with 3 extra configuration registers configured, which is > done by their downstream kernel). > > This revision contains only little code change -- only a Kconfig select > is added. The other purpose is to collect Thomas Zimmermann's tags and > squash MAINTAINERS change to real driver per his suggestion. > > Icenowy Zheng (8): > dt-bindings: vendor-prefixes: add verisilicon > dt-bindings: display: add verisilicon,dc > drm: verisilicon: add a driver for Verisilicon display controllers > dt-bindings: display/bridge: add binding for TH1520 HDMI controller > drm/bridge: add a driver for T-Head TH1520 HDMI controller > riscv: dts: thead: add DPU and HDMI device tree nodes > riscv: dts: thead: lichee-pi-4a: enable HDMI > mailmap: map all Icenowy Zheng's mail addresses > > .mailmap | 4 + > .../display/bridge/thead,th1520-dw-hdmi.yaml | 120 ++++++ > .../bindings/display/verisilicon,dc.yaml | 122 ++++++ > .../devicetree/bindings/vendor-prefixes.yaml | 2 + > MAINTAINERS | 8 + > .../boot/dts/thead/th1520-lichee-pi-4a.dts | 25 ++ > arch/riscv/boot/dts/thead/th1520.dtsi | 66 ++++ > drivers/gpu/drm/Kconfig | 2 + > drivers/gpu/drm/Makefile | 1 + > drivers/gpu/drm/bridge/Kconfig | 10 + > drivers/gpu/drm/bridge/Makefile | 1 + > drivers/gpu/drm/bridge/th1520-dw-hdmi.c | 173 ++++++++ > drivers/gpu/drm/verisilicon/Kconfig | 16 + > drivers/gpu/drm/verisilicon/Makefile | 5 + > drivers/gpu/drm/verisilicon/vs_bridge.c | 371 ++++++++++++++++++ > drivers/gpu/drm/verisilicon/vs_bridge.h | 39 ++ > drivers/gpu/drm/verisilicon/vs_bridge_regs.h | 54 +++ > drivers/gpu/drm/verisilicon/vs_crtc.c | 191 +++++++++ > drivers/gpu/drm/verisilicon/vs_crtc.h | 31 ++ > drivers/gpu/drm/verisilicon/vs_crtc_regs.h | 60 +++ > drivers/gpu/drm/verisilicon/vs_dc.c | 207 ++++++++++ > drivers/gpu/drm/verisilicon/vs_dc.h | 38 ++ > drivers/gpu/drm/verisilicon/vs_dc_top_regs.h | 27 ++ > drivers/gpu/drm/verisilicon/vs_drm.c | 182 +++++++++ > drivers/gpu/drm/verisilicon/vs_drm.h | 28 ++ > drivers/gpu/drm/verisilicon/vs_hwdb.c | 150 +++++++ > drivers/gpu/drm/verisilicon/vs_hwdb.h | 29 ++ > drivers/gpu/drm/verisilicon/vs_plane.c | 124 ++++++ > drivers/gpu/drm/verisilicon/vs_plane.h | 72 ++++ > .../gpu/drm/verisilicon/vs_primary_plane.c | 173 ++++++++ > .../drm/verisilicon/vs_primary_plane_regs.h | 53 +++ > 31 files changed, 2384 insertions(+) > create mode 100644 Documentation/devicetree/bindings/display/bridge/thead,th1520-dw-hdmi.yaml > create mode 100644 Documentation/devicetree/bindings/display/verisilicon,dc.yaml > create mode 100644 drivers/gpu/drm/bridge/th1520-dw-hdmi.c > create mode 100644 drivers/gpu/drm/verisilicon/Kconfig > create mode 100644 drivers/gpu/drm/verisilicon/Makefile > create mode 100644 drivers/gpu/drm/verisilicon/vs_bridge.c > create mode 100644 drivers/gpu/drm/verisilicon/vs_bridge.h > create mode 100644 drivers/gpu/drm/verisilicon/vs_bridge_regs.h > create mode 100644 drivers/gpu/drm/verisilicon/vs_crtc.c > create mode 100644 drivers/gpu/drm/verisilicon/vs_crtc.h > create mode 100644 drivers/gpu/drm/verisilicon/vs_crtc_regs.h > create mode 100644 drivers/gpu/drm/verisilicon/vs_dc.c > create mode 100644 drivers/gpu/drm/verisilicon/vs_dc.h > create mode 100644 drivers/gpu/drm/verisilicon/vs_dc_top_regs.h > create mode 100644 drivers/gpu/drm/verisilicon/vs_drm.c > create mode 100644 drivers/gpu/drm/verisilicon/vs_drm.h > create mode 100644 drivers/gpu/drm/verisilicon/vs_hwdb.c > create mode 100644 drivers/gpu/drm/verisilicon/vs_hwdb.h > create mode 100644 drivers/gpu/drm/verisilicon/vs_plane.c > create mode 100644 drivers/gpu/drm/verisilicon/vs_plane.h > create mode 100644 drivers/gpu/drm/verisilicon/vs_primary_plane.c > create mode 100644 drivers/gpu/drm/verisilicon/vs_primary_plane_regs.h > -- -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com GF: Jochen Jaser, Andrew McDonald, Werner Knoblich, (HRB 36809, AG Nürnberg)
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