Created attachment 72053 [details] 1920x1080i not full - dmesg Environment: -------------------------- Kernel: (drm-intel-next-queued)c0c36b941b6f0be6ac74f340040cbb29d6a0b06c Some additional commit info: Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Wed Dec 19 16:08:43 2012 +0000 drm/i915: Return the real error code from intel_set_mode() Steps: --------------------------- ./testdisplay -o 4 (or 5) Result: -------------------------- 1.DP mode show wrong size on screen. 2.It's not full,you can see it on the attachment and the dmesg-log.
Created attachment 72054 [details] 1080i-notfull1 photograph modes as below: CRTS(3):[0] 1920x1080i 50 1920 2448 2492 2640 1080 1084 1094 1125 0x15 0x40 74250 CRTS(3):[0] 1920x1080i 60 1920 2008 2052 2200 1080 1084 1094 1125 0x15 0x40 74250 The two modes were wrong. And you can see it on the photos with the attachment.
Created attachment 72055 [details] 1080i-notfuul2 photograph
The fix branch had the same problem.
Overscan on DP, I go nuts. Is this a regression? Also, is 1080i the only modes where this shows?
Also, does this happen with this exact monitor on other platforms with the DP output in the same way, or is there a difference?
(In reply to comment #4) > Overscan on DP, I go nuts. Is this a regression? Also, is 1080i the only > modes where this shows? 1.It's not a regression,the problem did almost exist. 2.Yes,just 1080i mode show not full.
(In reply to comment #5) > Also, does this happen with this exact monitor on other platforms with the > DP output in the same way, or is there a difference? 1.I had try on IVB&HSW,all platforms had this problem. 2.I had try on other monitors,also exist.
ALL platform,DP && HDMI,1920x1080i mode all exist this problem.
(In reply to comment #8) > ALL platform,DP && HDMI,1920x1080i mode all exist this problem. To confirm: For DP you have a DP output, DP cable and DP input on the monitor? For HDMI overscan is somewhat expected (we don't yet set the right infoframe attributes ...), but for native DP this is rather puzzling.
(In reply to comment #9) > (In reply to comment #8) > > ALL platform,DP && HDMI,1920x1080i mode all exist this problem. > > To confirm: For DP you have a DP output, DP cable and DP input on the > monitor? For HDMI overscan is somewhat expected (we don't yet set the right > infoframe attributes ...), but for native DP this is rather puzzling. reply confirm：DP output，cable and input on the monitor.
Environment: -------------------- Kernel: (drm-intel-testing)2945111e30137965700f061f6f4bda1bc3ab0ecd Some additional commit info: Merge: e5c6537 b514407 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Sun Jan 20 13:23:53 2013 +0100 Description: -------------------- This issue also exists on HSW machine. Not only 1920x1080i, the mode 1440x576i shows not full also.
Environment: -------------------- Kernel: (drm-intel-testing)2945111e30137965700f061f6f4bda1bc3ab0ecd Some additional commit info: Merge: e5c6537 b514407 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Sun Jan 20 13:23:53 2013 +0100 Description: -------------------- Add the mode 1440x480i also shows not full . CRTS(3):[0] 1440x480i 60 1440 1478 1602 1716 480 488 494 525 0x101a 0x40 27000
All of the "bad" modes mentioned here are what CEA-861 call CE video formats (as opposed to IT video formats). CEA-861 also states that in case the source doesn't transmit the overscan/underscan information, the sink should assume CE formats are overscanned and IT formats underscanned. So it sounds like the display is just following CEA-861 to the letter. Whether that makes any sense for a DP display is another matter. DP spec doesn't mentione anything about overscan. A bit of googling indicated that people are having similar issues with this display on some other operating systems as well. So yeah, sounds like we'd need to add infoframe support for DP so that we could force the sink to use underscan.
Test on kernel-3.12.0-rc3_drm-intel-testing_e5c753_20131005 (commit e5c7535c5bd7c98878aba8965015105e131c86f6) This issue also exists on HSW and ILK machine. Not only 1920x1080i, the mode 1440x576i shows not full also.
Test on kernel(drm-intel-testing)d1b2b826f0969182f055d11c991f90fdc6a4924a This issue also exists on IVB and ILK machine. Not only 1920x1080i, the mode 1440x576i and 1440x480i shows not full also.
I agree with Ville's assessment in comment #13 hence downgrading to a feature request.
We found not only 1920x1080i has this issue, but other interlaced modes (like 1440x576i 1440x480i ) also able to reproduce this.
Closed after more than one year of inactivity. Feel free to reopen if needed. Thanks.
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