[Bug 67027] [HSW] some modes overscan, on a 4K HDMI TV

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67027

--- Comment #7 from Qingshuai Tian <qingshuai.tian at intel.com> ---
Created attachment 89936
  --> https://bugs.freedesktop.org/attachment.cgi?id=89936&action=edit
dmesg of TV mode test with patched kernel

I added the patch in the latest drm-intel-nightly kernel.But some modes still
can't show completely on the screen. 
You can check the dmesg in the attachment.

The information of all mode (output of test case testdisplay -i):
Connectors:
id      encoder status          type    size (mm)       modes
9       0       disconnected    VGA     0x0             0
12      0       disconnected    HDMI-A  0x0             0
16      15      connected       HDMI-A  600x340         35
  modes:
  name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot flags type clock
[0]  3840x2160 30 3840 4016 4104 4400 2160 2168 2178 2250 0x5 0x40 297000
[1]  3840x2160 30 3840 4016 4104 4400 2160 2168 2178 2250 0x5 0x40 296704
[2]  3840x2160 25 3840 4896 4984 5280 2160 2168 2178 2250 0x5 0x40 297000
[3]  3840x2160 24 3840 5116 5204 5500 2160 2168 2178 2250 0x5 0x40 297000
[4]  3840x2160 24 3840 5116 5204 5500 2160 2168 2178 2250 0x5 0x40 296704
[5]  1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x40 148500
[6]  1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x40 148352
[7]  1920x1080i 60 1920 2008 2052 2200 1080 1084 1094 1125 0x15 0x40 74250
[8]  1920x1080i 60 1920 2008 2052 2200 1080 1084 1094 1125 0x15 0x40 74176
[9]  1920x1080 50 1920 2448 2492 2640 1080 1084 1089 1125 0x5 0x40 148500
[10]  1920x1080i 50 1920 2448 2492 2640 1080 1084 1094 1125 0x15 0x40 74250
[11]  1280x1024 75 1280 1296 1440 1688 1024 1025 1028 1066 0x5 0x40 135000
[12]  1280x720 60 1280 1390 1430 1650 720 725 730 750 0x5 0x40 74250
[13]  1280x720 60 1280 1390 1430 1650 720 725 730 750 0x5 0x40 74176
[14]  1280x720 50 1280 1720 1760 1980 720 725 730 750 0x5 0x40 74250
[15]  1440x576i 50 1440 1464 1590 1728 576 580 586 625 0x101a 0x40 27000
[16]  1024x768 75 1024 1040 1136 1312 768 769 772 800 0x5 0x40 78800
[17]  1024x768 70 1024 1048 1184 1328 768 771 777 806 0xa 0x40 75000
[18]  1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000
[19]  1440x480i 60 1440 1478 1602 1716 480 488 494 525 0x101a 0x40 27027
[20]  1440x480i 60 1440 1478 1602 1716 480 488 494 525 0x101a 0x40 27000
[21]  832x624 75 832 864 928 1152 624 625 628 667 0xa 0x40 57284
[22]  800x600 75 800 816 896 1056 600 601 604 625 0x5 0x40 49500
[23]  800x600 72 800 856 976 1040 600 637 643 666 0x5 0x40 50000
[24]  800x600 60 800 840 968 1056 600 601 605 628 0x5 0x40 40000
[25]  800x600 56 800 824 896 1024 600 601 603 625 0x5 0x40 36000
[26]  720x576 50 720 732 796 864 576 581 586 625 0xa 0x40 27000
[27]  720x480 60 720 736 798 858 480 489 495 525 0xa 0x40 27027
[28]  720x480 60 720 736 798 858 480 489 495 525 0xa 0x40 27000
[29]  640x480 75 640 656 720 840 480 481 484 500 0xa 0x40 31500
[30]  640x480 73 640 664 704 832 480 489 491 520 0xa 0x40 31500
[31]  640x480 67 640 704 768 864 480 483 486 525 0xa 0x40 30240
[32]  640x480 60 640 656 752 800 480 490 492 525 0xa 0x40 25200
[33]  640x480 60 640 656 752 800 480 490 492 525 0xa 0x40 25175
[34]  720x400 70 720 738 846 900 400 412 414 449 0x6 0x40 28320
18      0       disconnected    DP      0x0             0
19      0       disconnected    HDMI-A  0x0             0


The mode that cannot show completely is as follows:
[7]  1920x1080i 60 1920 2008 2052 2200 1080 1084 1094 1125 0x15 0x40 74250
[8]  1920x1080i 60 1920 2008 2052 2200 1080 1084 1094 1125 0x15 0x40 74176
[10]  1920x1080i 50 1920 2448 2492 2640 1080 1084 1094 1125 0x15 0x40 74250
[12]  1280x720 60 1280 1390 1430 1650 720 725 730 750 0x5 0x40 74250
[13]  1280x720 60 1280 1390 1430 1650 720 725 730 750 0x5 0x40 74176
[14]  1280x720 50 1280 1720 1760 1980 720 725 730 750 0x5 0x40 74250
[15]  1440x576i 50 1440 1464 1590 1728 576 580 586 625 0x101a 0x40 27000
[19]  1440x480i 60 1440 1478 1602 1716 480 488 494 525 0x101a 0x40 27027
[20]  1440x480i 60 1440 1478 1602 1716 480 488 494 525 0x101a 0x40 27000
[26]  720x576 50 720 732 796 864 576 581 586 625 0xa 0x40 27000
[27]  720x480 60 720 736 798 858 480 489 495 525 0xa 0x40 27027
[28]  720x480 60 720 736 798 858 480 489 495 525 0xa 0x40 27000

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