Kannada literature from this period is usually categorised into the linguistic phase called Old-Kannada. It constituted the bulk of the Chalukya court's textual production and pertained mostly to writings relating to the socio-religious development of the Jain faith. The earliest well-known writers belonging to the Shaiva faith are also from this period. Under the patronage of Kalachuri King Bijjala II, whose prime minister was the well-known Kannada poet and social reformer Basavanna, a native form of poetic literature called "Vachana" literature ("lit" "utterance", "saying" or "sentence") proliferated. The beginnings of the "Vachana" poetic tradition in the Kannada-speaking region trace back to the early 11th century. Kannada literature written in the "champu" metre, composed of prose and verse, was popularised by the Chalukyan court poets. However, with the advent of the Veerashaiva ("lit", "brave devotees of the god Shiva") religious movement in the mid-12th century, poets favoured the native "tripadi" (three-line verse composed of eleven "ganas" or prosodic units), "hadugabba" (song-poem) and free verse metres for their poems.