In this case, Linaro has mostly been getting everything running with mainline kernel (and upstreaming their work): https://www.linaro.org/blog/qualcomm-and-lina

In this case, Linaro has mostly been getting everything running with mainline kernel (and upstreaming their work): https://www.linaro.org/blog/qualcomm-and-linaro-enable-latest-flagship-snapdragon-compute-soc/ https://www.linaro.org/blog/qualcomm-and-linaro-enable-lates... . So things are looking a lot better than the usual Android ecosystem imo.