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@xxxxxxxxxxxxxxx>
> ---
> 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
--
nvpublic
