Add an eDP display path for the MT8189 and use it for the panel on the eDP connector of the Genio 520 and 720 EVKs. The pipeline is the same OVL -> RDMA one the DSI path uses, with the output crossbar switched to a DVO stage that feeds the eDP transmitter. The panel mode comes from its EDID over the AUX channel.
The EVKs drive the DSI panel by default. A new device tree overlay switches them to eDP, and is built into eDP variants of the Genio 520 and 720 device trees, with and without the UFS overlay. Tested on a Genio 720 EVK with the eDP variant. The device tree does not fully match the upstream bindings yet. The Linux bindings it follows are still under review and could change, and some of what it uses is not in any posted binding yet: - "mediatek,mt8189-edp-dvo" is added to the DVO binding in an in-flight Linux series [1]. That binding also wants an input port@0, which is left out until the MT8189 display path is described as a graph. - The eDP transmitter and its PHY are separate nodes linked by "phys", following the in-flight MT8196 eDP [2] and DisplayPort PHY [3] series. "mediatek,mt8189-edp-tx" and "mediatek,mt8189-edp-phy" are new compatibles, and mediatek,dp.yaml has no "phys" property yet. This series depends on the Genio 520/720 DSI series [4] (and its prerequisites) and on the MediaTek clock rate propagation series [5]. [1]: https://lore.kernel.org/all/[email protected]/ [2]: https://lore.kernel.org/all/[email protected]/ [3]: https://lore.kernel.org/all/[email protected]/ [4]: https://lore.kernel.org/u-boot/[email protected]/ [5]: https://lore.kernel.org/u-boot/[email protected]/ Signed-off-by: David Lechner <[email protected]> --- David Lechner (13): board: mediatek: MAINTAINERS: match the Genio 520/720 files with globs linux: drm_dp_helper: add the definitions needed for eDP link training phy: add the DisplayPort PHY configuration options phy: mediatek: add an MT8189 eDP PHY driver video: mediatek: mtk_ddp: allow routing the OVL output to DVO video: mediatek: mtk_disp_mutex: add DVO support video: mediatek: add a DVO driver video: mediatek: build the overlay with the shared pipeline video: mediatek: add an eDP driver arm: dts: mediatek: mt8189: add the eDP display path arm: dts: mediatek: describe the eDP panel on the Genio 520 and 720 EVKs arm: dts: mediatek: add an eDP overlay for the Genio 520 and 720 EVKs configs: mt8189: enable the eDP display path arch/arm/dts/Makefile | 12 + arch/arm/dts/mt8189.dtsi | 48 +- arch/arm/dts/mt8371-genio-common-edp.dtso | 54 + arch/arm/dts/mt8371-genio-common.dtsi | 134 ++ board/mediatek/MAINTAINERS | 11 +- configs/mt8189.config | 1 + drivers/phy/mediatek/Kconfig | 10 + drivers/phy/mediatek/Makefile | 1 + drivers/phy/mediatek/phy-mtk-dp.c | 276 ++++ drivers/video/mediatek/Kconfig | 30 +- drivers/video/mediatek/Makefile | 6 +- drivers/video/mediatek/mtk_ddp.c | 24 +- drivers/video/mediatek/mtk_ddp.h | 9 + drivers/video/mediatek/mtk_disp_mutex.c | 47 +- drivers/video/mediatek/mtk_disp_mutex.h | 11 + drivers/video/mediatek/mtk_dvo.c | 417 +++++ drivers/video/mediatek/mtk_dvo.h | 33 + drivers/video/mediatek/mtk_edp.c | 2385 +++++++++++++++++++++++++++++ include/linux/drm_dp_helper.h | 12 + include/phy-dp.h | 98 ++ 20 files changed, 3599 insertions(+), 20 deletions(-) --- base-commit: ca1c29c01bbd03f89cd86159b2959b4e72d41aa9 change-id: 20261007-mtk-genio-720-edp-3685b2cad31b Best regards, -- David Lechner <[email protected]>
