Hi Sebastian, Am Donnerstag, 6. August 2026, 19:02:06 Mitteleuropäische Sommerzeit schrieb Sebastian Reichel: > This patch series updates the Synopsys Designware DisplayPort bridge > together with the only existing user: The Rockchip RK3576/RK3588: > > 1. Follow-up bridges (PHY, USB-C connector) > This is needed to get USB-C DP AltMode working; I've followed > the Qualcomm driver as reference > > 2. Runtime PM > The initial driver has been upstreamed without RPM; add it to > avoid wasting power when nothing is plugged > > 3. Audio > The initial driver has been upstreamed without audio support; > this adds all missing bits for audio with single stream transport > > To properly make use of the bridge code the following USBDP PHY series > is also needed: > > https://lore.kernel.org/all/[email protected]/
I've now had time to test both series (dw-dp + usbdp) :-) - On my 1080p display I get nice output - On my 4K display I get "some" output after increasing the ACLK_VOP to 750MHz - although the output itself is garbled. Before there was no output at all - hotplug works correctly, typec-display altmode gets correctly set up and the drm driver enables output [0] - cable being plugged in on boot does not work completely. The usb-side gets detected correctly, but the drm-side stays at disconnected The usb+typec-related kernel messages look the same though. [1] Unplugging and replugging then produces display output. Heiko [0] [ 221.536599] platform xhci-hcd.4.auto: bus: 'platform': __driver_probe_device: matched device with driver xhci-hcd [ 221.548102] platform xhci-hcd.4.auto: bus: 'platform': really_probe: probing driver xhci-hcd with device [ 221.558836] xhci-hcd xhci-hcd.4.auto: xHCI Host Controller [ 221.564990] xhci-hcd xhci-hcd.4.auto: new USB bus registered, assigned bus number 5 [ 221.573652] xhci-hcd xhci-hcd.4.auto: hcc params 0x0220fe64 hci version 0x110 quirks 0x0000808002000010 [ 221.584184] xhci-hcd xhci-hcd.4.auto: irq 108, io mem 0xfc000000 [ 221.591002] xhci-hcd xhci-hcd.4.auto: xHCI Host Controller [ 221.597149] xhci-hcd xhci-hcd.4.auto: new USB bus registered, assigned bus number 6 [ 221.605724] xhci-hcd xhci-hcd.4.auto: Host supports USB 3.0 SuperSpeed [ 221.613368] usb usb5: bus: 'usb': __driver_probe_device: matched device with driver usb [ 221.622335] usb usb5: bus: 'usb': really_probe: probing driver usb with device [ 221.630503] usb 5-0:1.0: bus: 'usb': __driver_probe_device: matched device with driver hub [ 221.639776] usb 5-0:1.0: bus: 'usb': really_probe: probing driver hub with device [ 221.648171] hub 5-0:1.0: USB hub found [ 221.652396] hub 5-0:1.0: 1 port detected [ 221.656891] hub 5-0:1.0: driver: 'hub': driver_bound: bound to device [ 221.664125] hub 5-0:1.0: bus: 'usb': really_probe: bound device to driver hub [ 221.672155] usb usb5: driver: 'usb': driver_bound: bound to device [ 221.679099] usb usb5: bus: 'usb': really_probe: bound device to driver usb [ 221.686864] usb usb6: We don't know the algorithms for LPM for this host, disabling LPM. [ 221.696175] usb usb6: bus: 'usb': __driver_probe_device: matched device with driver usb [ 221.705143] usb usb6: bus: 'usb': really_probe: probing driver usb with device [ 221.713323] usb 6-0:1.0: bus: 'usb': __driver_probe_device: matched device with driver hub [ 221.722578] usb 6-0:1.0: bus: 'usb': really_probe: probing driver hub with device [ 221.730961] hub 6-0:1.0: USB hub found [ 221.735170] hub 6-0:1.0: 1 port detected [ 221.739647] hub 6-0:1.0: driver: 'hub': driver_bound: bound to device [ 221.746889] hub 6-0:1.0: bus: 'usb': really_probe: bound device to driver hub [ 221.754920] usb usb6: driver: 'usb': driver_bound: bound to device [ 221.761867] usb usb6: bus: 'usb': really_probe: bound device to driver usb [ 221.769602] xhci-hcd xhci-hcd.4.auto: driver: 'xhci-hcd': driver_bound: bound to device [ 221.778585] xhci-hcd xhci-hcd.4.auto: bus: 'platform': really_probe: bound device to driver xhci-hcd [ 222.032051] typec port0-partner.0: bus: 'typec': __driver_probe_device: matched device with driver typec_displayport [ 222.043845] typec port0-partner.0: bus: 'typec': really_probe: probing driver typec_displayport with device [ 222.054819] typec_displayport port0-partner.0: driver: 'typec_displayport': driver_bound: bound to device [ 222.065547] typec_displayport port0-partner.0: bus: 'typec': really_probe: bound device to driver typec_displayport [ 222.336513] usb 5-1: new full-speed USB device number 2 using xhci-hcd [ 222.493299] usb 5-1: not running at top speed; connect to a high speed hub [ 222.512188] usb 5-1: bus: 'usb': __driver_probe_device: matched device with driver usb [ 222.521057] usb 5-1: bus: 'usb': really_probe: probing driver usb with device [ 222.535340] usb 5-1: driver: 'usb': driver_bound: bound to device [ 222.542185] usb 5-1: bus: 'usb': really_probe: bound device to driver usb [ 224.327221] Console: switching to colour frame buffer device 240x67 [ 224.353443] rockchip-drm display-subsystem: [drm] fb0: rockchipdrmfb frame buffer device [1] ----------- [ 23.452524] platform xhci-hcd.4.auto: bus: 'platform': __driver_probe_device: matched device with driver xhci-hcd [ 23.464004] platform xhci-hcd.4.auto: bus: 'platform': really_probe: probing driver xhci-hcd with device [ 23.474654] xhci-hcd xhci-hcd.4.auto: xHCI Host Controller [ 23.480783] xhci-hcd xhci-hcd.4.auto: new USB bus registered, assigned bus number 5 [ 23.489401] xhci-hcd xhci-hcd.4.auto: hcc params 0x0220fe64 hci version 0x110 quirks 0x0000808002000010 [ 23.499910] xhci-hcd xhci-hcd.4.auto: irq 108, io mem 0xfc000000 [ 23.506671] xhci-hcd xhci-hcd.4.auto: xHCI Host Controller [ 23.512790] xhci-hcd xhci-hcd.4.auto: new USB bus registered, assigned bus number 6 [ 23.521346] xhci-hcd xhci-hcd.4.auto: Host supports USB 3.0 SuperSpeed [ 23.528805] usb usb5: bus: 'usb': __driver_probe_device: matched device with driver usb [ 23.537771] usb usb5: bus: 'usb': really_probe: probing driver usb with device [ 23.545879] usb 5-0:1.0: bus: 'usb': __driver_probe_device: matched device with driver hub [ 23.555120] usb 5-0:1.0: bus: 'usb': really_probe: probing driver hub with device [ 23.563486] hub 5-0:1.0: USB hub found [ 23.567675] hub 5-0:1.0: 1 port detected [ 23.572138] hub 5-0:1.0: driver: 'hub': driver_bound: bound to device [ 23.579343] hub 5-0:1.0: bus: 'usb': really_probe: bound device to driver hub [ 23.587327] usb usb5: driver: 'usb': driver_bound: bound to device [ 23.594240] usb usb5: bus: 'usb': really_probe: bound device to driver usb [ 23.601942] usb usb6: We don't know the algorithms for LPM for this host, disabling LPM. [ 23.618552] usb usb6: bus: 'usb': __driver_probe_device: matched device with driver usb [ 23.627501] usb usb6: bus: 'usb': really_probe: probing driver usb with device [ 23.635604] usb 6-0:1.0: bus: 'usb': __driver_probe_device: matched device with driver hub [ 23.644841] usb 6-0:1.0: bus: 'usb': really_probe: probing driver hub with device [ 23.653203] hub 6-0:1.0: USB hub found [ 23.657389] hub 6-0:1.0: 1 port detected [ 23.661798] hub 6-0:1.0: driver: 'hub': driver_bound: bound to device [ 23.668998] hub 6-0:1.0: bus: 'usb': really_probe: bound device to driver hub [ 23.676979] usb usb6: driver: 'usb': driver_bound: bound to device [ 23.683886] usb usb6: bus: 'usb': really_probe: bound device to driver usb [ 23.691574] xhci-hcd xhci-hcd.4.auto: driver: 'xhci-hcd': driver_bound: bound to device [ 23.700524] xhci-hcd xhci-hcd.4.auto: bus: 'platform': really_probe: bound device to driver xhci-hcd [ 23.951857] typec port0-partner.0: bus: 'typec': __driver_probe_device: matched device with driver typec_displayport [ 23.963628] typec port0-partner.0: bus: 'typec': really_probe: probing driver typec_displayport with device [ 23.974547] typec_displayport port0-partner.0: driver: 'typec_displayport': driver_bound: bound to device [ 23.985243] typec_displayport port0-partner.0: bus: 'typec': really_probe: bound device to driver typec_displayport [ 24.252358] usb 5-1: new full-speed USB device number 2 using xhci-hcd [ 24.408085] usb 5-1: not running at top speed; connect to a high speed hub [ 24.427935] usb 5-1: bus: 'usb': __driver_probe_device: matched device with driver usb [ 24.441732] usb 5-1: bus: 'usb': really_probe: probing driver usb with device [ 24.462931] usb 5-1: driver: 'usb': driver_bound: bound to device [ 24.475569] usb 5-1: bus: 'usb': really_probe: bound device to driver usb
