From: santosh.shilimkar@ti•com (Santosh Shilimkar)
To: linux-arm-kernel@lists•infradead.org
Subject: OMAP4430 SDP boot issues.. (Was Re: OMAP2430 SDP boot broken after Linus' rmk merge)
Date: Wed, 24 Jul 2013 14:17:07 -0400 [thread overview]
Message-ID: <51F01A23.2060502@ti.com> (raw)
In-Reply-To: <20130724172321.GC21614@n2100.arm.linux.org.uk>
On Wednesday 24 July 2013 01:23 PM, Russell King - ARM Linux wrote:
> On Wed, Jul 24, 2013 at 11:40:33AM -0400, Santosh Shilimkar wrote:
>> On Wednesday 24 July 2013 10:52 AM, Russell King - ARM Linux wrote:
>>> I also continue to be disappointed by the lack of things working on the
>>> 4430 - it's been a number of years now and _still_ the on-board LCDs do
>>> not work. People have tried to blame that on hardware faults and the
>>> like, but they're just being idiotic when they say stuff like that. It
>>> can't be hardware faults when the kernel supplied with the board is able
>>> to make them work to the extent that userspace can play back video on all
>>> three output devices simultaneously, without hiccup or any imperfection.
>>> I don't know whether it's just that the backlight support isn't working
>>> or what - because any information on the 4430 seems to be a tightly
>>> controlled secret that only a few select people are permitted to know
>>> about. As far as I'm concerned, much of the hardware is a black box to
>>> me.
>>>
>> On the display related issues, Tomi and Archit have been sorting out
>> issue but am not sure about the current state. If the pre-built binaries
>> video playback works means your hardware seems to be fine.
>
> Just let me be absolutely crystal clear about this: the on-board LCDs
> have _never_ worked with a mainline kernel, but they did work with the
> kernel which originally came with the board with the original 4430 SoC.
> I can right now put the original 4430 SoC back on the board and boot
> using the kernel which is still on the SD card and they will work.
>
> Even with the original 4430 SoC and mainline kernels, they have never
> worked.
>
> I tried it back and forth several times, but even with this, the
> explanation was always "your hardware must be faulty". And then the wrong
> voltage levels was found which was preventing the LCD modules from even
> being recognised... but still, no sign of life on the LCD panels.
>
> It may be that there's some error in the kernel configuration I'm building.
> I don't know, because I have _no_ idea what hardware is involved in
> bringing the LCDs online. Like I said above, the 4430SDP board is just
> a black box. I am totally reliant on others telling me what the right
> config options are supposed to be and fixing problems when things don't
> work.
>
> With the lack of information on this board, all I can do when things don't
> work is whinge and moan at people. I am powerless to debug the problems
> myself, even if they're a simple misconfiguration.
>
> Is there information available on the 4430SDP? Is there any reason I
> can't have access to it?
>
I haven't come across the information which is available on the web.
Let me check if there are schematics which i can send across to
you.
Regards,
Santosh
next prev parent reply other threads:[~2013-07-24 18:17 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-22 18:07 OMAP2430 SDP boot broken after Linus' rmk merge Paul Walmsley
2013-07-22 18:43 ` Russell King - ARM Linux
2013-07-22 20:07 ` Paul Walmsley
2013-07-23 7:03 ` Rajendra Nayak
2013-07-23 7:07 ` Paul Walmsley
2013-07-23 9:05 ` Rajendra Nayak
2013-07-24 13:56 ` Will Deacon
2013-07-24 14:17 ` Santosh Shilimkar
2013-07-24 14:20 ` Will Deacon
2013-07-24 14:45 ` Santosh Shilimkar
2013-07-27 4:10 ` Paul Walmsley
2013-07-27 12:22 ` Will Deacon
2013-07-28 5:38 ` Paul Walmsley
2013-07-28 5:46 ` [PATCH] ARM: v6: avoid remaining accesses to missing CP15 registers on ARM1136 r0 Paul Walmsley
2013-07-28 5:58 ` Paul Walmsley
2013-07-28 6:00 ` [PATCH v2] " Paul Walmsley
2013-07-28 19:58 ` Paul Walmsley
2013-07-28 5:43 ` [PATCH] ARM: v6: avoid read_cpuid_ext() on ARM1136r0 in cache_ops_need_broadcast() Paul Walmsley
2013-07-28 11:10 ` Will Deacon
2013-07-28 11:52 ` Russell King - ARM Linux
2013-07-28 19:56 ` Paul Walmsley
2013-07-28 19:47 ` Paul Walmsley
2013-07-28 20:16 ` [PATCH] ARM: v6: prevent gcc from reordering extended CP15 reads above is_smp() test Paul Walmsley
2013-07-29 7:30 ` Tony Lindgren
2013-07-29 10:02 ` Will Deacon
2013-07-30 10:58 ` Paul Walmsley
2013-07-30 11:32 ` [PATCH v2] ARM: v6: prevent gcc 4.5 " Paul Walmsley
2013-07-30 15:04 ` Will Deacon
2013-07-24 14:52 ` OMAP2430 SDP boot broken after Linus' rmk merge Russell King - ARM Linux
2013-07-24 15:40 ` OMAP4430 SDP boot issues.. (Was Re: OMAP2430 SDP boot broken after Linus' rmk merge) Santosh Shilimkar
2013-07-24 17:23 ` Russell King - ARM Linux
2013-07-24 18:17 ` Santosh Shilimkar [this message]
2013-07-25 6:40 ` OMAP2430 SDP boot broken after Linus' rmk merge Tomi Valkeinen
2013-07-25 6:50 ` Tomi Valkeinen
2013-07-26 22:59 ` Russell King - ARM Linux
2013-08-07 18:09 ` Paul Walmsley
2013-08-08 5:37 ` Rajendra Nayak
2013-08-08 10:20 ` Rajendra Nayak
2013-07-23 10:33 ` Jonathan Austin
2013-07-31 0:57 ` Paul Walmsley
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