I checked the difference between the dts's. It looks like the only
difference that matters is the panel-info { bpp } value. BB-BONE has a
bpp of 24. BB-VIEW has a bpp of 32. The display-timings information is
all identical.
Would it then make sense that the image is scaled and the colors are
corrupted if the 4D Systems screen is using the BB-VIEW dtb file with the
slightly higher bpp value?
Alex
On Friday, August 15, 2014 2:41:05 PM UTC-4, Alexander Hayman wrote:
>
> I am using Robert's bb-kernel git repo to build the kernel. It looks
> like we are using the exact same compiler.
> Linux version 3.8.13-bone62 (root@debian) (gcc version 4.7.3 20130328
> (prerelease) (crosstool-NG linaro-1.13.1-4.7-2013.04-20130415 - Linaro GCC
> 2013.04) )
>
> I noticed that you are passing specific commands to the capemgr.
> "capemgr.enable_partno=BB-VIEW-LCD4-01" This I am not doing. Should I be
> doing this? If I force it to capemgr.enable_partno=BB-BONE-LCD4-01, then
> maybe it will work even if your patch is installed?
>
> This is what the detection of the screen looks like on my kernel without
> the patches. Maybe the kernel is getting confused and using BB-VIEW dtb
> for my LCD instead of BB-BONE dtb?
>
> [ 0.725548] bone-capemgr bone_capemgr.9: Baseboard:
> 'A335BNLT,00A5,4110BBBK0000'
> [ 0.725572] bone-capemgr bone_capemgr.9:
> compatible-baseboard=ti,beaglebone-black
> [ 0.755349] bone-capemgr bone_capemgr.9: slot #0: No cape found
> [ 0.792456] bone-capemgr bone_capemgr.9: slot #1: No cape found
> [ 0.829564] bone-capemgr bone_capemgr.9: slot #2: No cape found
> [ 0.859739] bone-capemgr bone_capemgr.9: slot #3: '4D 4.3 LCD CAPE-
> 4DCAPE-43T ,00A1,4D SYSTEMS ,BB-BONE-LCD4-01'
> [ 0.859839] bone-capemgr bone_capemgr.9: slot #4: specific override
> [ 0.859859] bone-capemgr bone_capemgr.9: bone: Using override eeprom
> data at slot 4
> [ 0.859873] bone-capemgr bone_capemgr.9: slot #4:
> 'Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G'
> [ 0.859945] bone-capemgr bone_capemgr.9: slot #5: specific override
> [ 0.859963] bone-capemgr bone_capemgr.9: bone: Using override eeprom
> data at slot 5
> [ 0.859977] bone-capemgr bone_capemgr.9: slot #5:
> 'Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI'
> [ 0.860046] bone-capemgr bone_capemgr.9: slot #6: specific override
> [ 0.860063] bone-capemgr bone_capemgr.9: bone: Using override eeprom
> data at slot 6
> [ 0.860077] bone-capemgr bone_capemgr.9: slot #6:
> 'Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN'
> [ 0.860405] bone-capemgr bone_capemgr.9: loader: before slot-3
> BB-BONE-LCD4-01:00A1 (prio 0)
> [ 0.860420] bone-capemgr bone_capemgr.9: loader: check slot-3
> BB-BONE-LCD4-01:00A1 (prio 0)
> [ 0.860500] bone-capemgr bone_capemgr.9: loader: before slot-4
> BB-BONE-EMMC-2G:00A0 (prio 1)
> [ 0.860512] bone-capemgr bone_capemgr.9: loader: check slot-4
> BB-BONE-EMMC-2G:00A0 (prio 1)
> [ 0.860585] bone-capemgr bone_capemgr.9: loader: before slot-5
> BB-BONELT-HDMI:00A0 (prio 1)
> [ 0.860598] bone-capemgr bone_capemgr.9: loader: check slot-5
> BB-BONELT-HDMI:00A0 (prio 1)
> [ 0.860632] bone-capemgr bone_capemgr.9: initialized OK.
> [ 0.861126] bone-capemgr bone_capemgr.9: loader: after slot-3
> BB-BONE-LCD4-01:00A1 (prio 0)
> [ 0.861145] bone-capemgr bone_capemgr.9: slot #3: Requesting part
> number/version based 'BB-BONE-LCD4-01-00A1.dtbo
> [ 0.861167] bone-capemgr bone_capemgr.9: slot #3: Requesting firmware
> 'BB-BONE-LCD4-01-00A1.dtbo' for board-name '4D 4.3 LCD CAPE- 4DCAPE-43T
> ', version '00A1'
> [ 0.861186] bone-capemgr bone_capemgr.9: slot #3: dtbo
> 'BB-BONE-LCD4-01-00A1.dtbo' loaded; converting to live tree
> [ 0.861686] bone-capemgr bone_capemgr.9: slot #3: #4 overlays
>
>
> On 8/13/2014 3:06 PM, Scott Michel wrote:
>
> Alexander:
>
> Short answer: It works for me. :-)
>
> It turns out that a colleague has an Element-14 4.3" LCD cape here at
> work. I just booted up after changing uEnv.txt. Hard to work on the BBB at
> that screen resolution, but I don't have the image compression that you
> experienced.
>
> I'm not at the most recent tag on Robert's tree, but I could test it
> later this week. But given that the E-14 4.3" LCD cape works, it makes me
> wonder if the problem isn't with the DTB's pixel and dot clocking params?
>
> Now, I'll admit that I compiled my kernel with the 4.7.3 20130328
> prerelease compiler, so that could have made a difference if there were a
> compiler bug:
>
> [ 0.000000] Linux version 3.8.13-bone53 (-----@------------) (gcc
> version 4.7.3 20130328 (prerelease) (crosstool-NG
> linaro-1.13.1-4.7-2013.04-20130415 - Linaro GCC 2013.04) ) #40 SMP Fri May
> 30 13:18:49 PDT 2014
> [ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7),
> cr=50c5387d
> [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
> instruction cache
> [ 0.000000] Machine: Generic AM33XX (Flattened Device Tree), model: TI
> AM335x BeagleBone
> [ 0.000000] Memory policy: ECC disabled, Data cache writeback
> [ 0.000000] On node 0 totalpages: 130816
> [ 0.000000] free_area_init_node: node 0, pgdat c0880640, node_mem_map
> c08fb000
> [ 0.000000] Normal zone: 1024 pages used for memmap
> [ 0.000000] Normal zone: 0 pages reserved
> [ 0.000000] Normal zone: 129792 pages, LIFO batch:31
> [ 0.000000] AM335X ES2.1 (l2cache sgx neon )
> [ 0.000000] PERCPU: Embedded 9 pages/cpu @c0d0b000 s14080 r8192 d14592
> u36864
> [ 0.000000] pcpu-alloc: s14080 r8192 d14592 u36864 alloc=9*4096
> [ 0.000000] pcpu-alloc: [0] 0
> [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on.
> Total pages: 129792
> [ 0.000000] Kernel command line: console=tty0 console=ttyO0,115200n8
> drm.debug=0x05 capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
> capemgr.enable_partno=BB-VIEW-LCD4-01 root=/dev/mmcblk0p2 ro
> rootfstype=ext4 rootwait fixrtc quiet init=/lib/systemd/systemd
>
> I'm also using fbdev for the X server:
>
> [ 11.250] X Protocol Version 11, Revision 0
> [ 11.251] Build Operating System: Linux 3.2.0-4-mx5 armv7l Debian
> [ 11.251] Current Operating System: Linux beaglebone 3.8.13-bone53 #40
> SMP Fri May 30 13:18:49 PDT 2014 armv7l
> [ 11.253] Kernel command line: console=tty0 console=ttyO0,115200n8
> drm.debug=0x05 capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
> capemgr.enable_partno=BB-VIEW-LCD4-01 root=/dev/mmcblk0p2 ro
> rootfstype=ext4 rootwait fixrtc quiet init=/lib/systemd/systemd
> [ 11.256] Build Date: 17 December 2013 08:51:06PM
> [ 11.256] xorg-server 2:1.12.4-6+deb7u2 (Julien Cristau <
> [email protected] <javascript:>>)
> [ 11.256] Current version of pixman: 0.26.0
> [ 11.258] Before reporting problems, check http://wiki.x.org
> to make sure that you have the latest version.
> [ 11.258] Markers: (--) probed, (**) from config file, (==) default
> setting,
> (++) from command line, (!!) notice, (II) informational,
> (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
> [ 11.264] (==) Log file: "/var/log/Xorg.0.log", Time: Wed Apr 23
> 13:20:01 2014
> [ 11.292] (==) Using config file: "/etc/X11/xorg.conf"
> [ 11.293] (==) Using system config directory
> "/usr/share/X11/xorg.conf.d"
> [ 11.312] (==) ServerLayout "Builtin Default Layout"
> [ 11.313] (**) |-->Screen "Builtin Default fbdev Screen 0" (0)
> [ 11.313] (**) | |-->Monitor "Builtin Default Monitor"
> [ 11.317] (**) | |-->Device "Builtin Default fbdev Device 0"
> [ 11.318] (==) Automatically adding devices
>
>
>
> -scooter
>
>
> On Wed, Aug 13, 2014 at 7:40 AM, Alexander Hayman <[email protected]
> <javascript:>> wrote:
>
>> I can arrange to have one of the 4D Systems 4" LCD's sent to you. If
>> that would help. I could also do the kernel testing here to help
>> isolate the offender. I should be able to apply the patches one at a
>> time and do a quick partial recompile after each patch is applied?
>>
>> To answer your question about the DTB, I was just using whatever DTB's
>> are used in the Debian build generated via Robert Nelson's
>> omap-image-builder.
>>
>> Alex
>>
>> On 8/13/2014 12:44 AM, B. Scott Michel wrote:
>> > Robert:
>> >
>> > I'll try to get my hands on the Element-14 4" LCD to see if it happens
>> with that LCD. I have the same company's 7" LCD cape -- should be able to
>> narrow it down to either the board DTB or a compiler bug.
>> >
>> > -scooter
>> >
>> > Sent from my iPad
>> >
>> >> On Aug 12, 2014, at 5:14 PM, Robert Nelson <[email protected]
>> <javascript:>> wrote:
>> >>
>> >>> On Tue, Aug 12, 2014 at 7:06 PM, Scott Michel <[email protected]
>> <javascript:>> wrote:
>> >>> Alexander:
>> >>>
>> >>> I apologize for the delayed response -- I've been on travel for a
>> customer
>> >>> with more customers keeping me tied up in meetings yesterday and
>> today.
>> >>>
>> >>> I was going to ask which DTB you were using because your description
>> sounded
>> >>> as if pixel timings were off. Sounds like Robert found the issue
>> (were they
>> >>> my patches??)
>> >> My suspicion, it might be a compiler bug.
>> >> 0009-sitara_red_blue_swap_workaround.patch
>> >>
>> >> We are dealing with:
>> >>
>> >> gcc version 4.6.3 (Debian 4.6.3-14)
>> >>
>> >> I just disabled them for the time being..
>> >>
>> >>
>> https://github.com/RobertCNelson/bb-kernel/commit/59ba8323a910c7c3c032ee455d534ad43fba07f8
>> >>
>> >> Regards,
>> >>
>> >> --
>> >> Robert Nelson
>> >> http://www.rcn-ee.com/
>>
>> --
>> For more options, visit http://beagleboard.org/discuss
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>
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