ASoC: davinci-mcasp: Fix rx format when more bclk is used on the bus (d742b925) · Commits · 戴 / test

When the bus is configured to have more BCLK then the data type demands we need to use the rotation to move the data to correct place. Reported-by:

sound/soc/davinci/davinci-mcasp.c

+11 −2

Original line number	Diff line number	Diff line
		@@ -490,8 +490,17 @@ static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
		* both left and right channels), so it has to be divided by number of
		* tdm-slots (for I2S - divided by 2).
		*/
		if (mcasp->bclk_lrclk_ratio)
		word_length = mcasp->bclk_lrclk_ratio / mcasp->tdm_slots;
		if (mcasp->bclk_lrclk_ratio) {
		u32 slot_length = mcasp->bclk_lrclk_ratio / mcasp->tdm_slots;

		/*
		* When we have more bclk then it is needed for the data, we
		* need to use the rotation to move the received samples to have
		* correct alignment.
		*/
		rx_rotate = (slot_length - word_length) / 4;
		word_length = slot_length;
		}

		/* mapping of the XSSZ bit-field as described in the datasheet */
		fmt = (word_length >> 1) - 1;