On Tue, Aug 08, 2017 at 08:54:45PM +0200, Wolfram Sang wrote: > > > As it is an "RFT" I'm happy to apply it if you repost > > it or otherwise indicate that is what you would like to happen. > > As discussed in a chat, I tried SDR104 with my SDIO WiFi cards: > > H3: > - one slot worked flawlessly > - one slot could load FW but failed to read status > (with SDR50: both slots work) > > M3-W: > - both slots could not load the firmware > (with SDR50: one slot works, one fails to load FW) > > The cards, however, were correctly identified as SDR104 and there were > no tuning errors and no other SDHI related warnings. > > Changing TDSEL in the PFC did not change anything. > > The manual of the WiFi card (u-blox EMMY-W1) mentions a maximum line > length of 100mm. Measuring a direct line from the SoC to the slots, > I'd think we are very much on the edge of that. And given the length > of the SDIO adapter, we are surely exceeding that :( > > Maybe we should do more tests with more boards? On the other hand, it > seems the WiFi card is running out of the specs. > > So much for now. I'll sleep over it and try to get more data tomorrow. Thanks. Unfortunately my H3 is out of arms length but I can arrange some testing if it is helpful. Is one possibility to enable it for the slots listed above that are now thought to work but not for the other one? The SDR50 failure on M3-W seems particularly troubling as that has been enabled in upstream for a while, right?
