[Bug 96923] Black display once loading the module i915 on Bay trail (DSI/MIPI) - Zen10 tablet

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96923

--- Comment #9 from viric at viric.name ---
I also saw kms_setmode in i-g-t. The screen is all black; I can only notice
that the backlight switches off and on.

# ./kms_setmode 
IGT-Version: 1.15-NOT-GIT (x86_64) (Linux: 4.6.3 x86_64)
Testing: basic-clone-single-crtc 2 connector combinations
Subtest basic-clone-single-crtc: SUCCESS (0.270s)
Testing: invalid-clone-single-crtc 2 connector combinations
  Test id#1 CRTC count 1
    CRTC[26] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[35] (NC),
HDMI-A-2[42] (NC)
  Test id#2 CRTC count 1
    CRTC[31] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[35] (NC),
HDMI-A-2[42] (NC)
  Test id#3 CRTC count 1
    CRTC[26] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[35] (NC),
DSI-1[46]
  Test id#4 CRTC count 1
    CRTC[31] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[35] (NC),
DSI-1[46]
  Test id#5 CRTC count 1
    CRTC[26] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-2[42] (NC),
DSI-1[46]
  Test id#6 CRTC count 1
    CRTC[31] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-2[42] (NC),
DSI-1[46]
Subtest invalid-clone-single-crtc: SUCCESS (0.961s)
Testing: invalid-clone-exclusive-crtc 2 connector combinations
  Test id#7 CRTC count 2
    CRTC[26] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[35] (NC)
    CRTC[31] [Pipe B] Mode: 800x1280 at 62Hz Connectors: DSI-1[46]
  Test id#8 CRTC count 2
    CRTC[26] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-2[42] (NC)
    CRTC[31] [Pipe B] Mode: 800x1280 at 62Hz Connectors: DSI-1[46]
Subtest invalid-clone-exclusive-crtc: SUCCESS (0.740s)
Testing: clone-exclusive-crtc 2 connector combinations
  Test id#9 CRTC count 2
    CRTC[26] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[35] (NC)
    CRTC[31] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-2[42] (NC)
  Test id#10 CRTC count 2
    CRTC[31] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[35] (NC)
    CRTC[26] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-2[42] (NC)
  Test id#11 CRTC count 2
    CRTC[31] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[35] (NC)
    CRTC[26] [Pipe A] Mode: 800x1280 at 62Hz Connectors: DSI-1[46]
  Test id#12 CRTC count 2
    CRTC[31] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-2[42] (NC)
    CRTC[26] [Pipe A] Mode: 800x1280 at 62Hz Connectors: DSI-1[46]
Subtest clone-exclusive-crtc: SUCCESS (15.159s)
Testing: invalid-clone-single-crtc-stealing 2 connector combinations
  Test id#13 CRTC count 1
    CRTC[26] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[35] (NC),
HDMI-A-2[42] (NC)
  Test id#14 CRTC count 1
    CRTC[31] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[35] (NC),
HDMI-A-2[42] (NC)
  Test id#15 CRTC count 1
    CRTC[26] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[35] (NC),
DSI-1[46]
  Test id#16 CRTC count 1
    CRTC[31] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[35] (NC),
DSI-1[46]
(kms_setmode:1061) CRITICAL: Test assertion failure function test_stealing,
file kms_setmode.c:398:
(kms_setmode:1061) CRITICAL: Failed assertion: ret == 0
(kms_setmode:1061) CRITICAL: Last errno: 22, Invalid argument
(kms_setmode:1061) CRITICAL: error: -22 != 0
Stack trace:
  #0 [__igt_fail_assert+0xf1]
  #1 [test_combinations+0xd52]
  #2 [main+0x1af]
  #3 [__libc_start_main+0xf0]
  #4 [_start+0x29]
  #5 [<unknown>+0x29]
Subtest invalid-clone-single-crtc-stealing failed.
**** DEBUG ****
(kms_setmode:1061) INFO: Testing: invalid-clone-single-crtc-stealing 2
connector combinations
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=640,
height=480, format=0x34325258, tiling=0x0, size=0)
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=55,
pitch=2560)
(kms_setmode:1061) INFO:   Test id#13 CRTC count 1
(kms_setmode:1061) INFO:     CRTC[26] [Pipe A] Mode: 640x480 at 60Hz Connectors:
HDMI-A-1[35] (NC), HDMI-A-2[42] (NC)
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=640,
height=480, format=0x34325258, tiling=0x0, size=0)
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=56,
pitch=2560)
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=640,
height=480, format=0x34325258, tiling=0x0, size=0)
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=57,
pitch=2560)
(kms_setmode:1061) INFO:   Test id#14 CRTC count 1
(kms_setmode:1061) INFO:     CRTC[31] [Pipe B] Mode: 640x480 at 60Hz Connectors:
HDMI-A-1[35] (NC), HDMI-A-2[42] (NC)
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=640,
height=480, format=0x34325258, tiling=0x0, size=0)
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=58,
pitch=2560)
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=640,
height=480, format=0x34325258, tiling=0x0, size=0)
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=59,
pitch=2560)
(kms_setmode:1061) INFO:   Test id#15 CRTC count 1
(kms_setmode:1061) INFO:     CRTC[26] [Pipe A] Mode: 640x480 at 60Hz Connectors:
HDMI-A-1[35] (NC), DSI-1[46]
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=640,
height=480, format=0x34325258, tiling=0x0, size=0)
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=60,
pitch=2560)
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=640,
height=480, format=0x34325258, tiling=0x0, size=0)
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=61,
pitch=2560)
(kms_setmode:1061) INFO:   Test id#16 CRTC count 1
(kms_setmode:1061) INFO:     CRTC[31] [Pipe B] Mode: 640x480 at 60Hz Connectors:
HDMI-A-1[35] (NC), DSI-1[46]
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=640,
height=480, format=0x34325258, tiling=0x0, size=0)
(kms_setmode:1061) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=62,
pitch=2560)
(kms_setmode:1061) CRITICAL: Test assertion failure function test_stealing,
file kms_setmode.c:398:
(kms_setmode:1061) CRITICAL: Failed assertion: ret == 0
(kms_setmode:1061) CRITICAL: Last errno: 22, Invalid argument
(kms_setmode:1061) CRITICAL: error: -22 != 0
****  END  ****
Subtest invalid-clone-single-crtc-stealing: FAIL (2.966s)

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