On 18/10/2019 16:48, Ben Dooks wrote:
From: Edward Cragg edward.cragg@codethink.co.uk
The CIF configuration and clock setting is currently hard coded for 2 channels. Since the hardware is capable of supporting 1-8 channels add support for reading the channel count from the supplied parameters to allow for better TDM support. It seems the original implementation of this driver was fixed at 2 channels for simplicity, and not implementing TDM.
Signed-off-by: Edward Cragg edward.cragg@codethink.co.uk [ben.dooks@codethink.co.uk: added is_tdm and channel nr check] [ben.dooks@codethink.co.uk: merge edge control into set-format] [ben.dooks@codethink.co.uk: removed is_tdm and moved edge to hw_params] Signed-off-by: Ben Dooks ben.dooks@codethink.co.uk
v2:
- fix the lrclk for dsp-b format
sound/soc/tegra/tegra30_i2s.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-)
diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c index 063f34c882af..fc77e65a3646 100644 --- a/sound/soc/tegra/tegra30_i2s.c +++ b/sound/soc/tegra/tegra30_i2s.c @@ -67,6 +67,7 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai, { struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai); unsigned int mask = 0, val = 0;
unsigned int ch_mask, ch_val = 0;
switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF:
@@ -75,6 +76,7 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai, return -EINVAL; }
- ch_mask = TEGRA30_I2S_CH_CTRL_EGDE_CTRL_MASK; mask |= TEGRA30_I2S_CTRL_MASTER_ENABLE; switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBS_CFS:
@@ -90,10 +92,12 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai, TEGRA30_I2S_CTRL_LRCK_MASK; switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_DSP_A:
ch_val = TEGRA30_I2S_CH_CTRL_EGDE_CTRL_NEG_EDGE;
Sorry, I just saw the feedback on the previous iteration. I don't think we want to set the polarity but based upon the format that is passed ...
https://nv-tegra.nvidia.com/gitweb/?p=linux-nvidia.git;a=blob;f=sound/soc/te...
Cheers Jon