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[23.128.96.18]) by mx.google.com with ESMTP id k8si13560472ilu.164.2021.09.25.12.10.41; Sat, 25 Sep 2021 12:10:53 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=crapouillou.net Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229782AbhIYTK3 convert rfc822-to-8bit (ORCPT + 99 others); Sat, 25 Sep 2021 15:10:29 -0400 Received: from aposti.net ([89.234.176.197]:53210 "EHLO aposti.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229728AbhIYTK1 (ORCPT ); Sat, 25 Sep 2021 15:10:27 -0400 Date: Sat, 25 Sep 2021 20:08:41 +0100 From: Paul Cercueil Subject: Re: [PATCH v3 6/6] drm/ingenic: Attach bridge chain to encoders To: Paul Boddie Cc: "H. Nikolaus Schaller" , Laurent Pinchart , David Airlie , Daniel Vetter , linux-mips , list@opendingux.net, dri-devel , linux-kernel Message-Id: In-Reply-To: <2094991.ScV2v2meXk@jason> References: <20210922205555.496871-1-paul@crapouillou.net> <4366739.KZ8Jxz7LyS@jason> <2094991.ScV2v2meXk@jason> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8BIT Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Paul & Nikolaus, If you spent some time debugging the issue instead of complaining that my patchset breaks things... The fix is a one-liner in your downstream ingenic-dw-hdmi.c: .output_port = 1 in the ingenic_dw_hdmi_plat_data struct. Absolutely nothing else needs to be changed for HDMI to work here. Cheers, -Paul Le sam., sept. 25 2021 at 17:55:03 +0200, Paul Boddie a ?crit : > 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 > >