On Mon, 13 Oct 2025, at 8:23 AM, Jernej Skrabec wrote: > Current DE33 support in sun4i-drm driver is based on my PoC code. It was > written with *a lot* of hacks, because it was never meant to be upstreamed. > Fortunately, DT parts were never merged which give us a chance to do it > right. > > This is first of three series with proper DE33 support for H616 SoC. It's > the longest, since it prepares terrain for new drivers in remaining series. > Point of this work is to completely decouple mixer and layer code. Till > DE3, mixer and layers were intimately connected. However, from DE33 > onwards, this is no longer the case. DE33 and upcoming DE35 planes are > shared comodity between all mixers and can be assigned in any way driver > (or user) prefers. This requires planes code to be completely independent > from mixer. The only exception is mixer clock frequency which is used in > VI scaler, but in that case mixer pointer is obtained through currently > assigned CRTC. > > Second series will introduce separate driver for DE33 planes and adjust > mixer code to new DT bindings. Third series will introduce TCON(-TOP) > adjustments, HDMI PHY and finally, DT updates for several boards. > > Current WIP code for remaining two series can be found at [1]. Code has > been tested on Tanix TX6, which has DE3, for any regressions and on Myir > MYD-YT507H board [2], which has DE33, with HDMI and LVDS panel outputs > running simultaneously and independently. This confirms that plane code > is properly decoupled. > > Please review.
Thanks Jernej, can confirm that this patch series, when overlaid with the remaining out-of-tree patches and my previous LCD DT patch series, allows simultaneous HDMI and LCD output with separate framebuffers on the Anbernic RG35XX series of devices with the Allwinner H700. > Best regards, > Jernej > Tested-by: Ryan Walklin <[email protected]> Regards, Ryan
