The RK3588 SoC family integrates a Quad-Pixel (QP) variant of the Synopsys DesignWare HDMI TX controller used in the previous SoCs. It is HDMI 2.1 compliant and supports the following features, among others: * Fixed Rate Link (FRL) * 4K@120Hz and 8K@60Hz video modes * Variable Refresh Rate (VRR) including Quick Media Switching (QMS) * Fast Vactive (FVA) * SCDC I2C DDC access * TMDS Scrambler enabling 2160p@60Hz with RGB/YCbCr4:4:4 * YCbCr4:2:0 enabling 2160p@60Hz at lower HDMI link speeds * Multi-stream audio * Enhanced Audio Return Channel (EARC) This is the last required component that needs to be supported in order to enable the HDMI output functionality on the RK3588 based SBCs, such as the RADXA Rock 5B. The other components are the Video Output Processor (VOP2) and the Samsung IP based HDMI/eDP TX Combo PHY, for which basic support has been already made available via [1] and [2], respectively. The patches are grouped as follows: * PATCH 1..7: DW HDMI TX driver refactor to minimize code duplication in the new QP driver (no functional changes intended) * PATCH 8..11: Rockchip DW HDMI glue driver cleanup/improvements (no functional changes intended) * PATCH 12..13: The new DW HDMI QP TX driver reusing the previously exported functions and structs from existing DW HDMI TX driver * PATCH 14: Rockchip DW HDMI glue driver update to support RK3588 and make use of DW HDMI QP TX They provide just the basic HDMI support for now, i.e. RGB output up to 4K@60Hz, without audio, CEC or any of the HDMI 2.1 specific features. Also note the vop2 driver is currently not able to properly handle all display modes supported by the connected screens, e.g. it doesn't cope with non-integer refresh rates. A possible workaround consists of enabling the display controller to make use of the clock provided by the HDMI PHY PLL. This is still work in progress and will be submitted later, as well as the required DTS updates. To facilitate testing and experimentation, all HDMI output related patches, including those part of this series, are available at [3]. So far I could only verify this on the RADXA Rock 3A and 5B boards. Thanks, Cristian [1]: 5a028e8f062f ("drm/rockchip: vop2: Add support for rk3588") [2]: 553be2830c5f ("phy: rockchip: Add Samsung HDMI/eDP Combo PHY driver") [3]: https://gitlab.collabora.com/hardware-enablement/rockchip-3588/linux/-/commits/rk3588-hdmi-bridge-v6.10-rc1 Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx> --- Cristian Ciocaltea (14): drm/bridge: dw-hdmi: Simplify clock handling drm/bridge: dw-hdmi: Add dw-hdmi-common.h header drm/bridge: dw-hdmi: Commonize dw_hdmi_i2c_adapter() drm/bridge: dw-hdmi: Factor out AVI infoframe setup drm/bridge: dw-hdmi: Factor out vmode setup drm/bridge: dw-hdmi: Factor out hdmi_data_info setup drm/bridge: dw-hdmi: Commonize dw_hdmi_connector_create() drm/rockchip: dw_hdmi: Use modern drm_device based logging drm/rockchip: dw_hdmi: Simplify clock handling drm/rockchip: dw_hdmi: Use devm_regulator_get_enable() drm/rockchip: dw_hdmi: Drop superfluous assignments of mpll_cfg, cur_ctr and phy_config dt-bindings: display: rockchip,dw-hdmi: Add compatible for RK3588 drm/bridge: synopsys: Add DW HDMI QP TX controller driver drm/rockchip: dw_hdmi: Add basic RK3588 support .../display/rockchip/rockchip,dw-hdmi.yaml | 127 +++- drivers/gpu/drm/bridge/synopsys/Makefile | 2 +- drivers/gpu/drm/bridge/synopsys/dw-hdmi-common.h | 179 +++++ drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c | 787 +++++++++++++++++++ drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.h | 831 +++++++++++++++++++++ drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 353 +++------ drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 351 +++++++-- include/drm/bridge/dw_hdmi.h | 8 + 8 files changed, 2290 insertions(+), 348 deletions(-) --- base-commit: 1613e604df0cd359cf2a7fbd9be7a0bcfacfabd0 change-id: 20240601-b4-rk3588-bridge-upstream-a27baff1b8fc