> Wiadomość napisana przez Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx> w dniu 13 lut 2025, o godz. 18:26: > > Hello Piotr, > > > The RK3588 has two different DP controllers. The one handled in this > series should get the eDP port running, which is routed to the > "eDP Panel" in the block diagram on page 3 of the Rock 5 ITX schematics. > So this series adds support for using "HDMI/eDP TX0" and "HDMI/eDP TX1" > in DP mode. > > The port routed to HDMI0 via RA620 is the other DP controller, which > also exists twice: "TYPEC0/DP0" and "TYPEC1/DP1". This DP controller > is not yet supported upstream and there is no pending patchset. As far > as I know Rockchip plans to work on preparing upstream support for that > soon. > Oh - this is very valuable info and explains a lot. Thx. > Note, that the two DisplayPort controllers are completely different. > The HDMI/eDP controller is a design from Analogix and the TypeC/DP > controller is a design from Synopsys. > > P.S.: Heiko merged support for HDMI1 (RK3588 SoC level) recently. So you > should be able to get that running by some DT additions to the Rock 5 > ITX board DT with the latest linux-next code :) > And it works perfectly on all my 3588 bards (including audio and my cec addition) But only on boards using both hdmi tx0 and tx1 to hdmi0/hdmi1 ports. on rock5 itx: With both hdmi tx0 and tx1 enabled in dts it looks like kernel detects hdmi tx0 as connected and tries read edid. As nothing is connected to J11 (eDP con) - i’m getting i2c ddc timeouts [ 54.188880] dwhdmiqp-rockchip fde80000.hdmi: i2c read timed out [ 54.292207] dwhdmiqp-rockchip fde80000.hdmi: i2c read timed out [ 54.395554] dwhdmiqp-rockchip fde80000.hdmi: i2c read timed out disabling hdmi0 makes kernel talking to hdmi1 but with issues: [ 0.540446] dwhdmiqp-rockchip fdea0000.hdmi: registered DesignWare HDMI QP I2C bus driver [ 0.541230] rockchip-drm display-subsystem: bound fdea0000.hdmi (ops dw_hdmi_qp_rockchip_ops) [ 0.542285] [drm] Initialized rockchip 1.0.0 for display-subsystem on minor 0 [ 0.542933] rockchip-drm display-subsystem: [drm] Cannot find any crtc or sizes [ 0.543605] rockchip-drm display-subsystem: [drm] Cannot find any crtc or sizes and here i’m a bit puzzled as on other 3588 boards (i.e. rock5b) - when i connected monitor to hdmi1 - all works perfectly (kernel, OS and app nicely skipping hdmi0 and talking to actually connected hdmi1 port. all works) on rock5 itx this not works. my observations so far are: -on rock5 itx hdmi0 is falsely detected as connected - even when eDP connector (J11) has nothing connected -on rock5 itx disabling hdmi0 in dts breaks hdmi1 -on other 3588 (e.g. rock 5b) disabling hdmi0 in dts NOT breaks hdmi1 strange…. > Greetings, > > -- Sebastian > _______________________________________________ > Linux-rockchip mailing list > Linux-rockchip@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-rockchip
