On 8/13/24 4:17 PM, Heiko Stübner wrote: > Am Mittwoch, 7. August 2024, 13:07:22 CEST schrieb Cristian Ciocaltea: >> The Rockchip RK3588 SoC family integrates the Synopsys DesignWare HDMI >> 2.1 Quad-Pixel (QP) TX controller, which is a new IP block, quite >> different from those used in the previous generations of Rockchip SoCs. >> >> The controller supports the following features, among others: >> >> * Fixed Rate Link (FRL) >> * Display Stream Compression (DSC) >> * 4K@120Hz and 8K@60Hz video modes >> * Variable Refresh Rate (VRR) including Quick Media Switching (QMS) >> * Fast Vactive (FVA) >> * SCDC I2C DDC access >> * Multi-stream audio >> * Enhanced Audio Return Channel (EARC) >> >> This is the last 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. >> >> Please note this is a reworked version of the original series, which >> relied on a commonized dw-hdmi approach. Since the general consensus >> was to handle it as an entirely new IP, I dropped all patches related to >> the old dw-hdmi and Rockchip glue code - a few of them might still make >> sense as general improvements and will be submitted separately. >> >> It's worth mentioning the HDMI output support is currently limited to >> RGB output up to 4K@60Hz, without audio, CEC or any of the HDMI 2.1 >> specific features. Moreover, the VOP2 driver is 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 5B board. > > On a rk3588-tiger-haikou (including its DSI hat and my preliminary DSI > driver) it also works. > > Even with both DSI and HDMI at the same time. Both hdmi plugged in on > boot and also plugging it in during runtime of the board, generates a > clean image on my 1080p display. > > So, series > Tested-by: Heiko Stuebner <heiko@xxxxxxxxx> Thanks for checking this out! Regards, Cristian
