[PATCH] drm: lcdif: change burst size to 256B

[Marek Vasut]

On 10/27/22 10:04, Marco Felsch wrote:
> Hi Marek,

Hi,

> On 22-10-26, Marek Vasut wrote:
>> On 7/26/22 11:43, Marco Felsch wrote:
>>> FIFO underruns are seen if a AXI bus master with a higher priority do a
>>> lot of memory access. Increase the burst size to 256B to avoid such
>>> underruns and to improve the memory access efficiency.
>>>
>>> Signed-off-by: Marco Felsch <m.felsch at pengutronix.de>
>>
>> Uh, this fell through the cracks, sorry.
>>
>> Can you please collect my RB, add:
>>
>> Fixes: 9db35bb349a0 ("drm: lcdif: Add support for i.MX8MP LCDIF variant")
>>
>> and send V2 ?
>>
>> btw. the Panic mode seems to work on this IP with 4k displays and HDMI.
> 
> Sounds interesting, how did you verified that?

I plugged in a 4k panel into MX8MP HDMI port and saw this flicker, with 
the panic regs programmed correctly, there is no more flicker, see the 
commit messages of patch I posted yesterday for details, you were on CC:

[PATCH] drm: lcdif: Set and enable FIFO Panic threshold