Re: [PATCH 4/6] ARM: dts: da850-lcdk: add support for 1024x768 resolution

[Bartosz Golaszewski]

2016-09-30 14:49 GMT+02:00 Karl Beldan <karl.beldan@xxxxxxxxx>:
> On Fri, Sep 30, 2016 at 11:37:57AM +0200, Bartosz Golaszewski wrote:
>> 2016-09-29 20:58 GMT+02:00 Karl Beldan <karl.beldan@xxxxxxxxx>:
>> > Hi,
>> >
>> > On Thu, Sep 29, 2016 at 06:31:53PM +0200, Bartosz Golaszewski wrote:
>> >> Add svga timings for 1024x768 resolution to the da850-lcdk
>> >> device tree.
>> >>
>> >
>>
>> [snip]
>>
>> >
>> > Why do you also call 1024x768 svga ?
>> >
>>
>> Thanks, should have been xga. will fix in v2.
>>
>> > I don't think the LCDK can cope with this resolution at this frequency
>> > (in terms of mem bandwidth), at least that's what I observed back in
>> > August. If confirmed I think it is worth mentioning in the log at least,
>> > but then I doubt adding this config would be useful.
>> >
>>
>> Thanks for the heads up. How would that manifest itself? This seems to
>> work fine for me - I'm not getting any warnings on a simple system -
>> maybe if I added some additional memory load it would complain.
>>
>
> A mere dmesg > /dev/tty0 (or repeatedly cat-ting a file to /dev/tty0)
> should suffice to make the issue visible and trigger FIFO underflows.
>

Thanks, this is correct unfortunately.

Best regards,
Bartosz Golaszewski