Hi Paul, > Am 25.09.2021 um 21:08 schrieb Paul Cercueil <p...@crapouillou.net>: > > Hi Paul & Nikolaus, > > If you spent some time debugging the issue
we did ... > instead of complaining that my patchset breaks things... ... we did have a working version (without hdmi-connector) and bisect pointed at your patch... So we debugged that. So the lesson is: don't trust bisect. And failed to make it work with hdmi-connector because the ingenic-drm-drv reported errors. > > The fix is a one-liner in your downstream ingenic-dw-hdmi.c: > .output_port = 1 > in the ingenic_dw_hdmi_plat_data struct. Cool. How did you find that? > > Absolutely nothing else needs to be changed for HDMI to work here. Great and thanks. Will test asap and if it works as well, we can clean up a v4 patch set for next week review. BR and thanks, Nikolaus > > Cheers, > -Paul > > > Le sam., sept. 25 2021 at 17:55:03 +0200, Paul Boddie <p...@boddie.org.uk> a > écrit : >> On Friday, 24 September 2021 10:29:02 CEST Paul Cercueil wrote: >>> Le ven., sept. 24 2021 at 00:51:39 +0200, Paul Boddie >>> > >>> > 2. My approach, which just involves changing the Synopsys driver to >>> > set the bridge type in dw_hdmi_probe like this: >>> > >>> > hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA; >>> > >>> > Otherwise, I don't see how the bridge's (struct drm_bridge) type will >>> > be set. >>> The bridge's type is set in hdmi-connector, from DTS. The 'type = "a"' >>> will result in the bridge's .type to be set to DRM_MODE_CONNECTOR_HDMIA. >> Actually, I found that hdmi-connector might not have been available because >> CONFIG_DRM_DISPLAY_CONNECTOR was not enabled. Rectifying this, the connector >> does get detected and enabled. However, the Synopsys driver remains unaware >> of >> it, and so the bridge type in the Synopsys driver remains unset. >> I do see that the connector sets the type on a bridge in its own private >> structure, so there would be a need to propagate this type to the actual >> bridge. In other words, what the connector does is distinct from the Synopsys >> driver which acts as the bridge with regard to the Ingenic driver. >> Perhaps the Synopsys driver should set the connector's bridge as the next >> bridge, or maybe something is supposed to discover that the connector may act >> as (or provide) a bridge after the Synopsys driver in the chain and then >> back- >> propagate the bridge type along the chain. >> [...] >>> > And I removed any of the above hacks. What I observe, apart from an >>> > inactive LCD controller (and ingenic-drm driver), is the following in >>> > /sys/devices/platform/10180000.hdmi/: >>> > >>> > consumer:platform:13050000.lcdc0 >>> > consumer:platform:hdmi_connector >> Interestingly, with the connector driver present, these sysfs entries no >> longer appear. >> [...] >>> > For me, running modetest yields plenty of information about encoders, >>> > connectors (and the supported modes via the EDID, thanks to my HDMI-A >>> > hack), CRTCs, and planes. But no framebuffers are reported. >>> Could you paste the result of "modetest -a -c -p" somewhere maybe? >> I had to specify -M ingenic-drm as well, but here you go... >> ---- >> Connectors: >> id encoder status name size (mm) modes encoders >> 35 34 connected HDMI-A-1 340x270 17 34 >> modes: >> index name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot) >> #0 1280x1024 60.02 1280 1328 1440 1688 1024 1025 1028 1066 108000 flags: >> phsync, pvsync; type: preferred, driver >> #1 1280x1024 75.02 1280 1296 1440 1688 1024 1025 1028 1066 135000 flags: >> phsync, pvsync; type: driver >> #2 1280x960 60.00 1280 1376 1488 1800 960 961 964 1000 108000 flags: phsync, >> pvsync; type: driver >> #3 1152x864 75.00 1152 1216 1344 1600 864 865 868 900 108000 flags: phsync, >> pvsync; type: driver >> #4 1024x768 75.03 1024 1040 1136 1312 768 769 772 800 78750 flags: phsync, >> pvsync; type: driver >> #5 1024x768 70.07 1024 1048 1184 1328 768 771 777 806 75000 flags: nhsync, >> nvsync; type: driver >> #6 1024x768 60.00 1024 1048 1184 1344 768 771 777 806 65000 flags: nhsync, >> nvsync; type: driver >> #7 832x624 74.55 832 864 928 1152 624 625 628 667 57284 flags: nhsync, >> nvsync; type: driver >> #8 800x600 75.00 800 816 896 1056 600 601 604 625 49500 flags: phsync, >> pvsync; type: driver >> #9 800x600 72.19 800 856 976 1040 600 637 643 666 50000 flags: phsync, >> pvsync; type: driver >> #10 800x600 60.32 800 840 968 1056 600 601 605 628 40000 flags: phsync, >> pvsync; type: driver >> #11 800x600 56.25 800 824 896 1024 600 601 603 625 36000 flags: phsync, >> pvsync; type: driver >> #12 640x480 75.00 640 656 720 840 480 481 484 500 31500 flags: nhsync, >> nvsync; type: driver >> #13 640x480 72.81 640 664 704 832 480 489 492 520 31500 flags: nhsync, >> nvsync; type: driver >> #14 640x480 66.67 640 704 768 864 480 483 486 525 30240 flags: nhsync, >> nvsync; type: driver >> #15 640x480 59.94 640 656 752 800 480 490 492 525 25175 flags: nhsync, >> nvsync; type: driver >> #16 720x400 70.08 720 738 846 900 400 412 414 449 28320 flags: nhsync, >> pvsync; type: driver >> props: >> 1 EDID: >> flags: immutable blob >> blobs: >> value: >> 00ffffffffffff00047232ad01010101 >> 2d0e010380221b782aaea5a6544c9926 >> 145054bfef0081808140714f01010101 >> 010101010101302a009851002a403070 >> 1300520e1100001e000000ff00343435 >> 3030353444454330300a000000fc0041 >> 4c313731350a202020202020000000fd >> 00384c1e520e000a2020202020200051 >> 2 DPMS: >> flags: enum >> enums: On=0 Standby=1 Suspend=2 Off=3 >> value: 0 >> 5 link-status: >> flags: enum >> enums: Good=0 Bad=1 >> value: 0 >> 6 non-desktop: >> flags: immutable range >> values: 0 1 >> value: 0 >> 4 TILE: >> flags: immutable blob >> blobs: >> value: >> 20 CRTC_ID: >> flags: object >> value: 32 >> CRTCs: >> id fb pos size >> 32 39 (0,0) (1280x1024) >> #0 60.02 1280 1328 1440 1688 1024 1025 1028 1066 108000 flags: phsync, >> pvsync; type: >> props: >> 22 ACTIVE: >> flags: range >> values: 0 1 >> value: 1 >> 23 MODE_ID: >> flags: blob >> blobs: >> value: >> e0a5010000053005a005980600000004 >> 010404042a0400003c00000005000000 >> 00000000000000000000000000000000 >> 00000000000000000000000000000000 >> 00000000 >> 19 OUT_FENCE_PTR: >> flags: range >> values: 0 18446744073709551615 >> value: 0 >> 24 VRR_ENABLED: >> flags: range >> values: 0 1 >> value: 0 >> 28 GAMMA_LUT: >> flags: blob >> blobs: >> value: >> 29 GAMMA_LUT_SIZE: >> flags: immutable range >> values: 0 4294967295 >> value: 256 >> Planes: >> id crtc fb CRTC x,y x,y gamma size possible crtcs >> 31 32 39 0,0 0,0 0 0x00000001 >> formats: XR15 RG16 RG24 XR24 XR30 >> props: >> 8 type: >> flags: immutable enum >> enums: Overlay=0 Primary=1 Cursor=2 >> value: 1 >> 17 FB_ID: >> flags: object >> value: 39 >> 18 IN_FENCE_FD: >> flags: signed range >> values: -1 2147483647 >> value: -1 >> 20 CRTC_ID: >> flags: object >> value: 32 >> 13 CRTC_X: >> flags: signed range >> values: -2147483648 2147483647 >> value: 0 >> 14 CRTC_Y: >> flags: signed range >> values: -2147483648 2147483647 >> value: 0 >> 15 CRTC_W: >> flags: range >> values: 0 2147483647 >> value: 1280 >> 16 CRTC_H: >> flags: range >> values: 0 2147483647 >> value: 1024 >> 9 SRC_X: >> flags: range >> values: 0 4294967295 >> value: 0 >> 10 SRC_Y: >> flags: range >> values: 0 4294967295 >> value: 0 >> 11 SRC_W: >> flags: range >> values: 0 4294967295 >> value: 83886080 >> 12 SRC_H: >> flags: range >> values: 0 4294967295 >> value: 67108864 >> 33 0 0 0,0 0,0 0 0x00000001 >> formats: C8 XR15 RG16 RG24 XR24 XR30 >> props: >> 8 type: >> flags: immutable enum >> enums: Overlay=0 Primary=1 Cursor=2 >> value: 0 >> 17 FB_ID: >> flags: object >> value: 0 >> 18 IN_FENCE_FD: >> flags: signed range >> values: -1 2147483647 >> value: -1 >> 20 CRTC_ID: >> flags: object >> value: 0 >> 13 CRTC_X: >> flags: signed range >> values: -2147483648 2147483647 >> value: 0 >> 14 CRTC_Y: >> flags: signed range >> values: -2147483648 2147483647 >> value: 0 >> 15 CRTC_W: >> flags: range >> values: 0 2147483647 >> value: 0 >> 16 CRTC_H: >> flags: range >> values: 0 2147483647 >> value: 0 >> 9 SRC_X: >> flags: range >> values: 0 4294967295 >> value: 0 >> 10 SRC_Y: >> flags: range >> values: 0 4294967295 >> value: 0 >> 11 SRC_W: >> flags: range >> values: 0 4294967295 >> value: 0 >> 12 SRC_H: >> flags: range >> values: 0 4294967295 >> value: 0 >> ---- >>> If you have info about the CRTCs, encoders, connectors and EDID info, >>> then I would assume it is very close to working fine. >>> For your "no framebuffer" issue, keep in mind that CONFIG_FB and >>> CONFIG_FRAMEBUFFER_CONSOLE are now disabled by default. >> Yes, I discovered that CONFIG_FB was not enabled, so I did so. >>> If that doesn't fix anything, that probably means that one >>> .atomic_check() fails, so it would be a good place to start debugging. >> There will be other things to verify in the Ingenic driver. As noted many >> months ago, colour depth information has to be set in the DMA descriptors and >> not the control register, but we are managing to do this successfully, as far >> as I can tell, although there is always the potential for error. >> Paul > >
