raspberrypi/linux — pull request #701 by plughplover (2014-10-03 18:25:49+00:00)
Title: bcm2708-i2s sign-extend 24-bit capture

Enable hardware 'receive sign extension' (RXSEX) flag. Has no effect for tx, or on 16/32 bit rx, thus only affects S24_LE capture. If driver ever adds support for U24_LE PCM format this will need to 'fixed'.