Hi, On Tue, Mar 07, 2023 at 05:10:16PM +0000, Dave Stevenson wrote: > On Tue, 7 Mar 2023 at 16:25, AL13N <alien@xxxxxxxx> wrote: > > AL13N schreef op 2023-03-06 17:34: > > > I have a RPI4B connected on 2nd HDMI port (furthest away from power) > > > to a 4K TV, which works until 5.16, from 5.17 there is no X (or > > > plymouth), the cause of no X is that EDID gives nothing, and in the > > > journal; there is "Cannot find any crct or sizes". Only the kernel is > > > changed for this. > > > > > > In 5.16 instead of this message there is a bunch of hex lines prefixed > > > with BAD. > > > > > > It is still broken in 6.1 at the very least. > > > > > > I donno if this is related to this part, but I wanted to try a newer > > > kernel, because the RPI4 seems to do all the video decoding in > > > software and cannot seem to handle it. > > > > > > > > > logs: > > > vc4-drm gpu: bound fef05700.hdmi (ops vc4_hdmi_ops [vc4]) > > > vc4-drm gpu: bound fe004000.txp (ops vc4_txp_ops [vc4]) > > > vc4-drm gpu: bound fe206000.pixelvalve (ops vc4_crtc_ops [vc4]) > > > vc4-drm gpu: bound fe207000.pixelvalve (ops vc4_crtc_ops [vc4]) > > > vc4-drm gpu: bound fe20a000.pixelvalve (ops vc4_crtc_ops [vc4]) > > > vc4-drm gpu: bound fe216000.pixelvalve (ops vc4_crtc_ops [vc4]) > > > vc4-drm gpu: bound fec12000.pixelvalve (ops vc4_crtc_ops [vc4]) > > > checking generic (3ea81000 12c000) vs hw (0 ffffffffffffffff) > > > fb0: switching to vc4 from simple > > > Console: switching to colour dummy device 80x25 > > > [drm] Initialized vc4 0.0.0 20140616 for gpu on minor 0 > > > vc4-drm gpu: [drm] Cannot find any crtc or sizes > > > > 5.16 log has: > > > > vc4-drm gpu: bound fef05700.hdmi (ops vc4_hdmi_ops [vc4]) > > vc4-drm gpu: bound fe004000.txp (ops vc4_txp_ops [vc4]) > > vc4-drm gpu: bound fe206000.pixelvalve (ops vc4_crtc_ops [vc4]) > > vc4-drm gpu: bound fe207000.pixelvalve (ops vc4_crtc_ops [vc4]) > > vc4-drm gpu: bound fe20a000.pixelvalve (ops vc4_crtc_ops [vc4]) > > vc4-drm gpu: bound fe216000.pixelvalve (ops vc4_crtc_ops [vc4]) > > vc4-drm gpu: bound fec12000.pixelvalve (ops vc4_crtc_ops [vc4]) > > [drm] Initialized vc4 0.0.0 20140616 for gpu on minor 0 > > [00] BAD 00 ff ff ff ff ff ff 00 36 74 00 00 00 00 00 00 > > [00] BAD 0b 1f 01 03 00 23 01 78 0a cf 74 a3 57 4c b0 23 > > [00] BAD 09 48 4c 00 00 00 01 01 01 ff 01 ff ff 01 01 01 > > [00] BAD 01 01 01 01 01 20 08 e8 00 30 f2 70 5a 80 b0 58 > > [00] BAD 8a 00 c4 8e 21 00 00 1e 02 3a 80 18 71 38 2d 40 > > [00] BAD 58 2c 45 00 c4 8e 21 00 00 1e 00 00 00 fc 00 53 > > [00] BAD 41 4c 4f 52 41 0a 20 20 20 20 20 20 00 00 00 fd > > [00] BAD 00 3b 46 1f 8c 3c 00 0a 20 20 20 20 20 20 01 aa > > Console: switching to colour frame buffer device 240x67 > > vc4-drm gpu: [drm] fb0: vc4drmfb frame buffer device > > > > > > i donno what this bad is, but it doesn't happen in 5.17... maybe these > > BAD got filtered out, but they did end up working for me? or something? > > i donno... > > Run it through edid-decode - the checksum is wrong. > > Block 0, Base EDID: > EDID Structure Version & Revision: 1.3 > Vendor & Product Identification: > Manufacturer: MST > Model: 0 > Made in: week 11 of 2021 > Basic Display Parameters & Features: > Analog display > Input voltage level: 0.7/0.3 V > Blank level equals black level > Maximum image size: 35 cm x 1 cm > Gamma: 2.20 > RGB color display > First detailed timing is the preferred timing > Color Characteristics: > Red : 0.6396, 0.3398 > Green: 0.2998, 0.6904 > Blue : 0.1376, 0.0380 > White: 0.2822, 0.2968 > Established Timings I & II: none > Standard Timings: > GTF : 2288x1432 61.000 Hz 16:10 90.463 kHz 282.245 MHz > Detailed Timing Descriptors: > DTD 1: 3840x2160 60.000 Hz 16:9 135.000 kHz 594.000 MHz (708 > mm x 398 mm) > Hfront 176 Hsync 88 Hback 296 Hpol P > Vfront 8 Vsync 10 Vback 72 Vpol P > DTD 2: 1920x1080 60.000 Hz 16:9 67.500 kHz 148.500 MHz (708 > mm x 398 mm) > Hfront 88 Hsync 44 Hback 148 Hpol P > Vfront 4 Vsync 5 Vback 36 Vpol P > Display Product Name: 'SALORA' > Display Range Limits: > Monitor ranges (GTF): 59-70 Hz V, 31-140 kHz H, max dotclock 600 MHz > Extension blocks: 1 > Checksum: 0xaa (should be 0xeb) > > Weird that it also says that it's an analog display when it's > connected over HDMI. Something rather bizarre there, and I think it'll > hit problems in drm_edid at [1] as we end up with a connector having > no color_formats defined. I was discussing this with Maxime only last > week, but in relation to VGA monitors connected through HDMI to VGA > adapters without rewriting the EDID. > > If you have an issue between 5.16 and 5.17, then I'd guess at [2] and > your monitor not asserting hotplug correctly. The raw hotplug status > is reported in /sys/kernel/debug/dri/N/hdmi0_regs (N will be either 0 > or 1 depending on the probe order of the vc4 and v3d drivers). Grep > for HDMI_HOTPLUG. If it's an option, bisecting between 5.16 and 5.17 which commit introduced the regression would be nice. > Incorrect hotplug behaviour causes grief when combined with HDMI2.0 > and scrambling. If you don' t know the other end has been > disconnected, then you never know that scrambling needs to be > re-negotiated over SCDC, and the display will typically end up just > being blank. > > [1] https://github.com/torvalds/linux/blob/master/drivers/gpu/drm/drm_edid.c#L6460 > [2] https://github.com/torvalds/linux/commit/cc5f1cbbc1e12ad5b11d594159fe793eb03c70fa We can easily test that: could you try booting with video=HDMI-A-1:D (or HDMI-A-2, depending on whether you use HDMI0 or HDMI1) and see if it helps? > > I also noticed that earlier in the logs there are more bound lines: > > (some are double) > > > > vc4-drm gpu: bound fe400000.hvs (ops vc4_hvs_ops [vc4]) > > vc4-drm gpu: bound fe400000.hvs (ops vc4_hvs_ops [vc4]) > > > > and then here for some reason systemd does modprobe@drm.service ? is > > this just a delayed starting log line, or does it actually try to unload > > drm and reload? i doubt it? > > in any case there is more that appears before: > > > > vc4-drm gpu: bound fe400000.hvs (ops vc4_hvs_ops [vc4]) > > vc4-drm gpu: bound fe400000.hvs (ops vc4_hvs_ops [vc4]) > > vc4-drm gpu: bound fe400000.hvs (ops vc4_hvs_ops [vc4]) > > vc4-drm gpu: bound fef00700.hdmi (ops vc4_hdmi_ops [vc4]) > > vc4-drm gpu: bound fe400000.hvs (ops vc4_hvs_ops [vc4]) > > vc4-drm gpu: bound fef00700.hdmi (ops vc4_hdmi_ops [vc4]) > > > > > > so, the error message is weird, as it implies 2 possibilities. however, > > i think it did find a crtc since all those pixelvalve things use crtc > > functions? > > > > So then why do i have this problem on my RPI4? do most people just use > > the raspberry pi kernels? > > Largely, yes, people use our vendor kernels. tbf, the downstream kernel has pretty much the same code here, so the issue is very likely to affect it too. I would just assume that your TV has some unusual behaviour that throws the driver off, and most people won't. Maxime
