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Thu, 5 Feb 2026 09:30:55 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id 9tp3Ok9jhGnGJQAAD6G6ig (envelope-from ); Thu, 05 Feb 2026 09:30:55 +0000 Message-ID: Date: Thu, 5 Feb 2026 10:30:55 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 0/8] Verisilicon DC8200 driver (and adaption to TH1520) To: Icenowy Zheng , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Drew Fustini , Guo Ren , Fu Wei Cc: Philipp Zabel , Dmitry Baryshkov , Michal Wilczynski , Luca Ceresoli , Han Gao , Yao Zi , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, Icenowy Zheng References: <20260129023922.1527729-1-zhengxingda@iscas.ac.cn> Content-Language: en-US From: Thomas Zimmermann Autocrypt: addr=tzimmermann@suse.de; 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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)