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]>) [ 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]> 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]> > wrote: > >> > >>> On Tue, Aug 12, 2014 at 7:06 PM, Scott Michel <[email protected]> > 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 > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/sjJJWe2dkb4/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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