On Mon, Sep 07, 2020 at 01:21:51PM +0200, Lukas Wunner wrote: > On Mon, Sep 07, 2020 at 02:03:40PM +0300, Mika Westerberg wrote: > > Kai-Heng reported that sometimes DROM parsing of ASUS PA27AC Thunderbolt 3 > > monitor fails. This makes the driver to fail to add the device so only > > DisplayPort tunneling is functional. > > Maybe the DROM is contained in an external EEPROM attached via slow > SPI or i2c and cannot be read in time before a response on the control > channel is due? Does it help to always delay 100 ms before performing > the DROM read with this display? Perhaps a quirk specific for this > display is more appropriate than a change which affects all devices? > Because this way of working around problems is difficult to maintain > long term. It helps to always wait the 100ms IIRC but I'm not sure we want to do that for every device. Also I'm not a fan of maintaining a list of quirks if we have the possibility to have more "general" solution to the issue (like what we do here, retry once).
