Created attachment 114335 [details] dmesg ==System Environment== -------------------------- Regression: No. This is first time to test this HDMI resolution on this platform. Non-working platforms: BSW ==kernel== -------------------------- -nightly: f7def439e21cacf7656539edc55a4884734743de (fails) ==Bug detailed description== ----------------------------- HDMI resolution-2560x1440@60Hz can't be lighted up Monitor model No: Dell UP3214Qt 1.cvt 2560 1440 60 # 2560x1440 59.96 Hz (CVT 3.69M9) hsync: 89.52 kHz; pclk: 312.25 MHz Modeline "2560x1440_60.00" 312.25 2560 2752 3024 3488 1440 1443 1448 1493 -hsync +vsync 2./testdisplay -f 312.25,2560,2752,3024,3488,1440,1443,1448,1493 CRTC(20):[0] 2560x1440 59 2560 2752 3024 3488 1440 1443 1448 1493 0x0 0x0 312250 failed to set mode (2560x1440@59Hz): Invalid argument ==Reproduce steps== ---------------------------- 1.cvt 2560 1440 60 # 2560x1440 59.96 Hz (CVT 3.69M9) hsync: 89.52 kHz; pclk: 312.25 MHz Modeline "2560x1440_60.00" 312.25 2560 2752 3024 3488 1440 1443 1448 1493 -hsync +vsync 2./testdisplay -f 312.25,2560,2752,3024,3488,1440,1443,1448,1493 CRTC(20):[0] 2560x1440 59 2560 2752 3024 3488 1440 1443 1448 1493 0x0 0x0 312250 failed to set mode (2560x1440@59Hz): Invalid argument
To support 2560x1600/60Hz, we have to set the mode with reduced blanking (by "cvt -r"), to make pclk under 304 MHz (which is CHV limitation).
EDID： 0000: 00 ff ff ff ff ff ff 00 10 ac 92 40 50 34 31 30 0010: 14 18 01 03 80 46 27 78 ea 73 e0 a3 53 36 b6 26 0020: 0d 51 53 a5 4b 00 81 00 b3 00 d1 00 71 4f a9 40 0030: 81 80 d1 c0 01 01 04 74 00 30 f2 70 5a 80 b0 58 0040: 8a 00 ba 88 21 00 00 1e 00 00 00 ff 00 4b 33 52 0050: 39 30 34 35 43 30 31 34 50 0a 00 00 00 fc 00 44 0060: 45 4c 4c 20 55 50 33 32 31 34 51 0a 00 00 00 fd 0070: 00 1d 4b 1f 8c 1e 00 0a 20 20 20 20 20 20 01 0c 0080: 02 03 23 b1 50 90 05 04 03 02 07 16 01 06 11 12 0090: 15 13 14 1f 20 6d 03 0c 00 10 00 00 3c 20 00 60 00a0: 03 02 01 04 74 00 30 f2 70 5a 80 b0 58 8a 00 ba 00b0: 88 21 00 00 1e 02 3a 80 18 71 38 2d 40 58 2c 25 00c0: 00 ba 88 21 00 00 1e 01 1d 80 18 71 1c 16 20 58 00d0: 2c 25 00 ba 88 21 00 00 9e 01 1d 00 72 51 d0 1e 00e0: 20 6e 28 55 00 ba 88 21 00 00 1e 8c 0a d0 8a 20 00f0: e0 2d 10 10 3e 96 00 ba 88 21 00 00 18 00 00 14 ManufactureID: DEL MonitorID: 4092 SerialNumber: 014P ProductWeek/year: 20/2014 EdidVersion: 1.3 MonitorType: Digital ColorBitDepth: 0 Bits per Primary Color InterfaceStandardSupported: PowerSupport: standby suspend activeoff RGB ChromaInfo: 73 e0 a3 53 36 b6 26 d 51 53 EstablishedTiming: 1280x1024 @ 75 135000 1688 1066 1024x768 @ 75 78800 1312 800 1024x768 @ 60 65000 1344 806 800x600 @ 75 49500 1056 625 800x600 @ 60 40000 1056 628 640x480 @ 75 31500 840 500 640x480 @ 60 25200 800 525 720x400 @ 70 28320 900 449 StandarTiming: 1280x800 @ 60 83500 1680 831 (16:10) 1680x1050 @ 60 146250 2240 1089 (16:10) 1920x1200 @ 60 193250 2592 1245 (16:10) 1152x864 @ 75 108000 1600 900 (4:3) 1600x1200 @ 60 162000 2160 1250 (4:3) 1280x1024 @ 60 108000 1688 1066 (5:4) 1920x1440 @ 60 234000 2600 1500 (4:3) DetailTiming: 3840x2160 @ 30.00 297000 4400 2250 Having a hdmi block, start position is:96
CHV can't handle such a high pixel clock. It's a feature not a bug.
So CHV can support 2560x1600/60Hz (with reduced blanking), but can't support 2560x1440/60Hz (with reduced blanking)?
(In reply to Gordon Jin from comment #4) > So CHV can support 2560x1600/60Hz (with reduced blanking), but can't support > 2560x1440/60Hz (with reduced blanking)? No, it can do both with reduced blanking. It can't do either with non-reduced blanking.
Got it. Lei, I think we can verify it.
Closing old verified.
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