Hi Morimoto-san,
On Tue, Mar 11, 2014 at 08:36:22PM -0700, Kuninori Morimoto wrote:
Hi Mark
asoc-simple-card sound-cs42888.12: cpu : 2024000.esai / 4003 / 132000000 asoc-simple-card sound-cs42888.12: codec : cs42888 / 1003 / 24576000 asoc-simple-card sound-cs42888.12: cs42888 <-> 2024000.esai mapping ok
cpu = 4003 : SND_SOC_DAIFMT_CBS_CFS | SND_SOC_DAIFMT_LEFT_J codec = 1003 : SND_SOC_DAIFMT_CBM_CFM | SND_SOC_DAIFMT_LEFT_J
codec is master, cpu is slave... what is problem ?? Am I misunderstanding ?
The C in those constants stands for CODEC and the values should be identical for both ends of the link.
Wow ! really ?? Then, is this settiting wrong ??
${LINUX}/arch/arm/mach-shmobile/board-armadillo800eva.c :: fsi_wm8978_info
static struct asoc_simple_card_info fsi_wm8978_info = { ... .daifmt = SND_SOC_DAIFMT_I2S, .cpu_dai = { ... .fmt = SND_SOC_DAIFMT_CBS_CFS | SND_SOC_DAIFMT_IB_NF, }, .codec_dai = { ... .fmt = SND_SOC_DAIFMT_CBM_CFM | SND_SOC_DAIFMT_NB_NF, }, };
It should be like this ?
static struct asoc_simple_card_info fsi_wm8978_info = { ... .daifmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, .cpu_dai = { ... .fmt = SND_SOC_DAIFMT_IB_NF, }, .codec_dai = { ... .fmt = SND_SOC_DAIFMT_NB_NF, }, };
This would be better imo.
And ideally we should also keep the xB_xF identical like Mark said _identical_. Just some cpu dai drivers might do an incorrect settings for it, like regarding NB as sampling on rising edge and IF as active low (I'm saying this without a careful check though), which results people need to re-set bitclock-invert and frame-invert if they switch the DAI format from left_j to i2s for example.
Thank you, Nicolin Chen