[Bug 34822] New: Blank display on Toshiba laptop C670D-10C using AMD E-240 Palm chip

[Bug 34822] New: Blank display on Toshiba laptop C670D-10C using AMD E-240 Palm chip

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=34822

           Summary: Blank display on Toshiba laptop C670D-10C using AMD
                    E-240 Palm chip
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.39-rc7
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
        ReportedBy: anisse@astier.eu
        Regression: No


Created an attachment (id=57132)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=57132)
dmesg using Linus' HEAD of May 10th 2011

On a Toshiba laptop using an AMD Fusion GPU (SoC: E-240), I am unable to have
screen turn on with KMS. It stays blank, even when starting the X server.

I tried with 2.6.38.5, Today's Linus tree, Yesterday's drm-2.6/drm-next, all to
the same result.

Here is the lspci:

00:00.0 Host bridge [0600]: Advanced Micro Devices [AMD] Device [1022:1510]
00:01.0 VGA compatible controller [0300]: ATI Technologies Inc Device
[1002:9803]
00:11.0 SATA controller [0106]: ATI Technologies Inc SB700/SB800 SATA
Controller [AHCI mode] [1002:4391] (rev 40)
00:12.0 USB Controller [0c03]: ATI Technologies Inc SB700/SB800 USB OHCI0
Controller [1002:4397]
00:12.2 USB Controller [0c03]: ATI Technologies Inc SB700/SB800 USB EHCI
Controller [1002:4396]
00:13.0 USB Controller [0c03]: ATI Technologies Inc SB700/SB800 USB OHCI0
Controller [1002:4397]
00:13.2 USB Controller [0c03]: ATI Technologies Inc SB700/SB800 USB EHCI
Controller [1002:4396]
00:14.0 SMBus [0c05]: ATI Technologies Inc SBx00 SMBus Controller [1002:4385]
(rev 42)
00:14.1 IDE interface [0101]: ATI Technologies Inc SB700/SB800 IDE Controller
[1002:439c] (rev 40)
00:14.2 Audio device [0403]: ATI Technologies Inc SBx00 Azalia (Intel HDA)
[1002:4383] (rev 40)
00:14.3 ISA bridge [0601]: ATI Technologies Inc SB700/SB800 LPC host controller
[1002:439d] (rev 40)
00:14.4 PCI bridge [0604]: ATI Technologies Inc SBx00 PCI to PCI Bridge
[1002:4384] (rev 40)
00:15.0 PCI bridge [0604]: ATI Technologies Inc Device [1002:43a0]
00:15.1 PCI bridge [0604]: ATI Technologies Inc Device [1002:43a1]
00:15.2 PCI bridge [0604]: ATI Technologies Inc Device [1002:43a2]
00:16.0 USB Controller [0c03]: ATI Technologies Inc SB700/SB800 USB OHCI0
Controller [1002:4397]
00:16.2 USB Controller [0c03]: ATI Technologies Inc SB700/SB800 USB EHCI
Controller [1002:4396]
00:18.0 Host bridge [0600]: Advanced Micro Devices [AMD] Device [1022:1700]
(rev 43)
00:18.1 Host bridge [0600]: Advanced Micro Devices [AMD] Device [1022:1701]
00:18.2 Host bridge [0600]: Advanced Micro Devices [AMD] Device [1022:1702]
00:18.3 Host bridge [0600]: Advanced Micro Devices [AMD] Device [1022:1703]
00:18.4 Host bridge [0600]: Advanced Micro Devices [AMD] Device [1022:1704]
00:18.5 Host bridge [0600]: Advanced Micro Devices [AMD] Device [1022:1718]
00:18.6 Host bridge [0600]: Advanced Micro Devices [AMD] Device [1022:1716]
00:18.7 Host bridge [0600]: Advanced Micro Devices [AMD] Device [1022:1719]
03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device
[10ec:8176] (rev 01)
04:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd.
RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 05)

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--- Comment #1 from Anisse Astier <anisse@astier.eu>  2011-05-10 14:58:40 ---
Created an attachment (id=57142)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=57142)
Xorg log starting the X server manually in verbose mode

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--- Comment #2 from Anisse Astier <anisse@astier.eu>  2011-05-10 15:05:27 ---
Created an attachment (id=57152)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=57152)
dmesg log with drm.debug=1 loglevel=9

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Anisse Astier <anisse@astier.eu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #57152|0                           |1
        is obsolete|                            |




--- Comment #3 from Anisse Astier <anisse@astier.eu>  2011-05-10 15:21:33 ---
Created an attachment (id=57162)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=57162)
dmesg log with drm.debug=4

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--- Comment #4 from Anisse Astier <anisse@astier.eu>  2011-05-10 15:48:22 ---
I tried booting with video=1600x900, 1440x900, 1280x800 and 1024x768 and none
of them changed anything.

I didn't specify it, but screen is blank AND backlight is off.

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--- Comment #5 from Anisse Astier <anisse@astier.eu>  2011-05-10 15:59:30 ---
Created an attachment (id=57182)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=57182)
vbios rom in /sys/bus/pci/devices/0000:00:01.0

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Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com




--- Comment #6 from Alex Deucher <alexdeucher@gmail.com>  2011-05-10 16:01:56 ---
travis DP to LVDS bridges are not supported yet.  I'll update this bug when I
have patches ready.

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--- Comment #7 from Alex Deucher <alexdeucher@gmail.com>  2011-05-26 15:45:37 ---
There is initial support for DP bridges in drm-radeon-testing:
http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=shortlog;h=refs/heads/drm-radeon-testing

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Anisse Astier <anisse@astier.eu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #57162|0                           |1
        is obsolete|                            |




--- Comment #8 from Anisse Astier <anisse@astier.eu>  2011-05-26 16:57:21 ---
Created an attachment (id=59612)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=59612)
Dmesg with drm-radeon-testing as of 05/26

Just tested drm-radeon-testing, unfortunately, it seems like there is no
change, screen is still blank, no backlight. 

Would it be possible that the radeon_encoder->encoder_id information is wrong?
And that there is no DP bridge ?

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--- Comment #9 from Alex Deucher <alexdeucher@gmail.com>  2011-05-26 17:10:03 ---
(In reply to comment #8)
> Would it be possible that the radeon_encoder->encoder_id information is wrong?
> And that there is no DP bridge ?

No it's correct.  You can see the DPCD for the bridge printed and the link
seems to train ok.

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--- Comment #10 from Alex Deucher <alexdeucher@gmail.com>  2011-05-26 21:52:25 ---
Can you attach your xorg log and the output of xrandr --verbose from the new
kernel?

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--- Comment #11 from Alex Deucher <alexdeucher@gmail.com>  2011-05-26 22:19:20 ---
Created an attachment (id=59622)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=59622)
fix handling of DP to LVDS bridges

This patch on top of drm-radeon-testing should get you up and running.

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--- Comment #12 from Alex Deucher <alexdeucher@gmail.com>  2011-05-26 23:43:54 ---
Created an attachment (id=59642)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=59642)
additional patch

If the patch in comment 11 doesn't work, you can try this one as well on top of
the patch in comment 11.

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--- Comment #13 from Anisse Astier <anisse@astier.eu>  2011-05-27 10:34:38 ---
Created an attachment (id=59652)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=59652)
Xorg log with drm-radeon-testing as of 05/26 (no patch applied)

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--- Comment #14 from Anisse Astier <anisse@astier.eu>  2011-05-27 10:45:53 ---
Created an attachment (id=59662)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=59662)
Dmesg with 1st patch applied

As you asked, I tried with first patch, then second patch on top of it.

No change on display (still blank, no backlight) in any case.

But we can see here a difference in modesets shown  kernel log, before and
after first patch.

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--- Comment #15 from Anisse Astier <anisse@astier.eu>  2011-05-27 10:48:09 ---
Created an attachment (id=59672)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=59672)
xrandr output before and after first patch

Here you can see the output of xrandr before and after applying patch in
comment 11 . Adding patch in comment 12 didn't change anything.

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Florian Mickler <florian@mickler.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |florian@mickler.org




--- Comment #16 from Florian Mickler <florian@mickler.org>  2011-06-21 11:57:00 ---
A patch referencing this bug report has been merged in v3.0-rc4:

commit f89931f345f26c43b109191fbfcfa506781111c0
Author: Alex Deucher <alexdeucher@gmail.com>
Date:   Mon Jun 13 17:13:35 2011 -0400

    drm/radeon/kms: fix handling of DP to LVDS bridges

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--- Comment #17 from Anisse Astier <anisse@astier.eu>  2011-06-21 14:43:04 ---
It's the same patch as in comment 11 which I reported tested and non-working in
comment 14 . I just tested 3.0-rc4, screen is still blank and/or no backlight.

The only improvement (difference ?) seems to be in modelines detection.

--- Comment #18 from Alex Deucher <alexdeucher@gmail.com>  2011-06-21 18:47:40 ---
There are a number of additional fixes in 3.0-rc4.  Do any of them help?

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--- Comment #19 from Anisse Astier <anisse@astier.eu>  2011-06-22 14:02:24 ---
Created an attachment (id=63192)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=63192)
Dmesg with 3.0-rc4

Alas, no improvement. Just like I said in comment 14, native
resolution(1600x900) is now detected and in the default modeline.

See this dmesg log with 3.0-rc4 for more information. Is there anything else I
can provide/do ?

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--- Comment #20 from Alex Deucher <alexdeucher@gmail.com>  2011-08-29 21:06:20 ---
Does the patch from comment 12 help with a newer kernel (3.1)?

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--- Comment #21 from Anisse Astier <anisse@astier.eu>  2011-08-30 10:12:34 ---
I tried the patch from comment 12 on top of linus' tree (HEAD:
0f43dd546d991ca260d8a72d07f). I tried without the patch.
Unfortunately, there was no change, and screen is still black.

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Anisse Astier <anisse@astier.eu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |CODE_FIX




--- Comment #22 from Anisse Astier <anisse@astier.eu>  2012-04-29 13:02:40 ---
This should have been fixed by now.

Reference: https://bugs.freedesktop.org/show_bug.cgi?id=41569

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