On 18/10/2019 16:48, Ben Dooks wrote:
If the hw_params uses a different bit or channel count, then we need to change both the I2S unit's CIF configuration as well as the APBIF one.
To allow changing the APBIF, add a call to reconfigure the RX or TX FIFO without changing the DMA or allocation, and get the I2S driver to call it once the hw params have been calculate.
Signed-off-by: Ben Dooks ben.dooks@codethink.co.uk
sound/soc/tegra/tegra30_ahub.c | 115 ++++++++++++++++++--------------- sound/soc/tegra/tegra30_ahub.h | 5 ++ sound/soc/tegra/tegra30_i2s.c | 2 + 3 files changed, 69 insertions(+), 53 deletions(-)
diff --git a/sound/soc/tegra/tegra30_ahub.c b/sound/soc/tegra/tegra30_ahub.c index 952381260dc3..24bc03428b45 100644 --- a/sound/soc/tegra/tegra30_ahub.c +++ b/sound/soc/tegra/tegra30_ahub.c @@ -84,12 +84,40 @@ static int tegra30_ahub_runtime_resume(struct device *dev) return 0; }
+int tegra30_ahub_setup_rx_fifo(enum tegra30_ahub_rxcif rxcif,
struct tegra30_ahub_cif_conf *cif_conf)+{
- int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
- u32 reg, val;
- pm_runtime_get_sync(ahub->dev);
- reg = TEGRA30_AHUB_CHANNEL_CTRL +
(channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);- val = tegra30_apbif_read(reg);
- val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);- val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;- tegra30_apbif_write(reg, val);
- cif_conf->direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
- reg = TEGRA30_AHUB_CIF_RX_CTRL +
(channel * TEGRA30_AHUB_CIF_RX_CTRL_STRIDE);- ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, cif_conf);
- pm_runtime_put(ahub->dev);
- return 0;
+} +EXPORT_SYMBOL_GPL(tegra30_ahub_setup_rx_fifo);
int tegra30_ahub_allocate_rx_fifo(enum tegra30_ahub_rxcif *rxcif, char *dmachan, int dmachan_len, dma_addr_t *fiforeg) { int channel;
u32 reg, val; struct tegra30_ahub_cif_conf cif_conf;
channel = find_first_zero_bit(ahub->rx_usage,
@@ -104,37 +132,14 @@ int tegra30_ahub_allocate_rx_fifo(enum tegra30_ahub_rxcif *rxcif, *fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_RXFIFO + (channel * TEGRA30_AHUB_CHANNEL_RXFIFO_STRIDE);
- pm_runtime_get_sync(ahub->dev);
- memset(&cif_conf, 0, sizeof(cif_conf));
reg = TEGRA30_AHUB_CHANNEL_CTRL +
(channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);val = tegra30_apbif_read(reg);
val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;tegra30_apbif_write(reg, val);
cif_conf.threshold = 0; cif_conf.audio_channels = 2; cif_conf.client_channels = 2; cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16; cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
cif_conf.expand = 0;
cif_conf.stereo_conv = 0;
cif_conf.replicate = 0;
cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
cif_conf.truncate = 0;
cif_conf.mono_conv = 0;
reg = TEGRA30_AHUB_CIF_RX_CTRL +
(channel * TEGRA30_AHUB_CIF_RX_CTRL_STRIDE);ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
pm_runtime_put(ahub->dev);
return 0;
- return tegra30_ahub_setup_rx_fifo(*rxcif, &cif_conf);
I am not sure why it is necessary to call this here now because this is called everytime you call hw_params() right? It seems redundant to me.
Cheers Jon