Thread (63 messages) 63 messages, 8 authors, 2014-05-21

[PATCH 1/4] OMAPDSS: Fix DSS clock multiplier issue on 3703 and probably 3630

From: tony@atomide.com (Tony Lindgren)
Date: 2014-05-12 14:40:35
Also in: linux-devicetree, linux-fbdev, linux-omap

* Andreas M?ller [off-list ref] [140512 01:20]:
On Sun, May 11, 2014 at 4:42 PM, Tony Lindgren [off-list ref] wrote:
quoted
* Andreas M?ller [off-list ref] [140509 14:07]:
quoted
On Fri, May 9, 2014 at 9:38 AM, Tomi Valkeinen [off-list ref] wrote:
quoted
On 30/04/14 02:52, Tony Lindgren wrote:
quoted
Otherwise we can get often errors like the following and the
display won't come on:

omapdss APPLY error: FIFO UNDERFLOW on gfx, disabling the overlay
omapdss APPLY error: SYNC_LOST on channel lcd, restarting
the output with video overlays disabled

There are some earlier references to this issue:

http://www.spinics.net/lists/linux-omap/msg59511.html
http://www.spinics.net/lists/linux-omap/msg59724.html
resend - my client had HTML enabled...

FWIW: I have had issues long time ago [1]. With mainline 3.14.3 I had
still the reboot problem on old 600MHz OMAP 3530. Applying this patch
solved the issues. For other versions I had no chance to reproduce the
original wakup issue mentioned in old thread
Sorry I'm a bit confused now. Is the reboot issue a separate issue
related to the twl4030 generic scripts for 3530?

And then this patch fixes dm3730 wake-up (from suspend?) issues?

Or do we have some other bug where we wrongly hit omap3630_dss_feats
on 3530 somehow?
(What I think) I have done: Have 3.14.3 still booting with legacy
board init (please don't kill me for that). Without applying your
patch old OMAP3530 crashed at every reboot with SYNCH_LOST.

After applying your patch reboot works fine.

Looking into id-code makes me wonder what changes on 36xx-features do
to 35xx devices (treated as 34xx - right?). The only way that this
happens is for unknown hawkeye fallthough. I suggest you simply forget
my note and I will find out what really 'fixed' dss reboot problem.
Yeah 35xx should be treated as 34xx so sounds like there might be
some detection problem if this patch does something for your board.

Regards,

Tony
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