Thread (22 messages) 22 messages, 5 authors, 2019-08-28

Re: [PATCH v3 00/15] Improvements and fixes for mxsfb DRM driver

From: Robert Chiras <robert.chiras@nxp.com>
Date: 2019-08-28 06:50:30
Also in: dri-devel, linux-arm-kernel, lkml

Hi Leonard,

On Lu, 2019-08-26 at 19:19 +0000, Leonard Crestez wrote:
On 26.08.2019 17:35, Stefan Agner wrote:
quoted
On 2019-08-26 14:05, Guido Günther wrote:
quoted
Hi,
On Wed, Aug 21, 2019 at 01:15:40PM +0300, Robert Chiras wrote:
quoted
This patch-set improves the use of eLCDIF block on iMX 8 SoCs
(like 8MQ, 8MM
and 8QXP). Following, are the new features added and fixes from
this
patch-set:
I've applied this whole series on top of my NWL work and it looks
good
with a DSI panel. Applying the whole series also fixes an issue
where
after unblank the output was sometimes shifted about half a
screen width
to the right (which didn't happen with DCSS). So at least from
the parts
I could test:

   Tested-by: Guido Günther [off-list ref]

for the whole thing.
Thanks for testing! What SoC did you use? I think it would be good
to
also give this a try on i.MX 7 or i.MX 6ULL before merging.
I did a quick test on imx6sx-sdb and it seems that [PATCH 07/15] 
"drm/mxsfb: Fix the vblank events" causes a hang on boot, even
without a 
panel.

If I revert that particular patch it seems to be fine: the new pixel 
formats seem to work in modetest (checked with sii,43wvf1g panel).
Thanks for feedback. I tested this and, indeed there are issues on 6SX
with this particular patch. It seems that there is a race-condition
caused by the vblank_on call in enable and IRQ routine. Since this is
not happening on any of i.MX8 SoC, I suspect the axi clock usage.
I think I will just remove this patch from the patch-set and handle
this case separately.
--
Regards,
Leonard
Regards,
Robert
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