09.12.2019 19:40, Mark Brown пишет: > On Thu, Dec 05, 2019 at 06:48:49PM -0800, Sowjanya Komatineni wrote: >> mclk is from clk_out_1 which is part of Tegra PMC block and pmc clocks >> are moved to Tegra PMC driver with pmc as clock provider and using pmc >> clock ids. >> >> New device tree uses clk_out_1 from pmc clock provider. >> >> So, this patch adds fallback to extern1 in case of retrieving mclk fails >> to be backward compatible of new device tree with older kernels. >> >> Cc: stable@xxxxxxxxxxxxxxx > > Why would this need to be a stable fix? Presumably people with stable > kernels are using the old device tree anyway? > Presumably, yes. At least Rob Herring is asking to maintain backwards compatibility because some ditros are using newer device-trees with stable kernels. I'm personally also tending to use the newer DTB with older kernel version whenever there is a need to check something using stable kernel. Perhaps losing sound is not very important, but will be nicer if that doesn't happen.
