From: Code Kipper <codekipper@gmail.com>
To: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Linux-ALSA <alsa-devel@alsa-project.org>,
linux-sunxi <linux-sunxi@googlegroups.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Liam Girdwood <lgirdwood@gmail.com>,
"Andrea Venturi \(pers\)" <be17068@iperbole.bo.it>,
Chen-Yu Tsai <wens@csie.org>, Mark Brown <broonie@kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v5 02/15] ASoC: sun4i-i2s: Add set_tdm_slot functionality
Date: Fri, 16 Aug 2019 08:27:05 +0200 [thread overview]
Message-ID: <CAEKpxBkOu0+zek9f=4grNEhyPS=Ly3nweCUCgaz6y8M61xvpaQ@mail.gmail.com> (raw)
In-Reply-To: <20190814070923.wwkw7hybjvy3p4br@flea>
On Wed, 14 Aug 2019 at 13:08, Maxime Ripard <maxime.ripard@bootlin.com> wrote:
>
> Hi,
>
> On Wed, Aug 14, 2019 at 08:08:41AM +0200, codekipper@gmail.com wrote:
> > From: Marcus Cooper <codekipper@gmail.com>
> >
> > Codecs without a control connection such as i2s based HDMI audio and
> > the Pine64 DAC require a different amount of bit clocks per frame than
> > what is calculated by the sample width. Use the tdm slot bindings to
> > provide this mechanism.
> >
> > Signed-off-by: Marcus Cooper <codekipper@gmail.com>
> > ---
> > sound/soc/sunxi/sun4i-i2s.c | 23 +++++++++++++++++++++--
> > 1 file changed, 21 insertions(+), 2 deletions(-)
> >
> > diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
> > index 8201334a059b..7c37b6291df0 100644
> > --- a/sound/soc/sunxi/sun4i-i2s.c
> > +++ b/sound/soc/sunxi/sun4i-i2s.c
> > @@ -195,6 +195,9 @@ struct sun4i_i2s {
> > struct regmap_field *field_rxchansel;
> >
> > const struct sun4i_i2s_quirks *variant;
> > +
> > + unsigned int tdm_slots;
> > + unsigned int slot_width;
> > };
> >
> > struct sun4i_i2s_clk_div {
> > @@ -346,7 +349,7 @@ static int sun4i_i2s_set_clk_rate(struct snd_soc_dai *dai,
> > if (i2s->variant->has_fmt_set_lrck_period)
> > regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
> > SUN8I_I2S_FMT0_LRCK_PERIOD_MASK,
> > - SUN8I_I2S_FMT0_LRCK_PERIOD(32));
> > + SUN8I_I2S_FMT0_LRCK_PERIOD(word_size));
> >
> >
> > /* Set sign extension to pad out LSB with 0 */
> > regmap_field_write(i2s->field_fmt_sext, 0);
> > @@ -450,7 +453,8 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
> > regmap_field_write(i2s->field_fmt_sr, sr);
> >
> > return sun4i_i2s_set_clk_rate(dai, params_rate(params),
> > - params_width(params));
> > + i2s->tdm_slots ?
> > + i2s->slot_width : params_width(params));
>
> This is slightly more complicated than that.
At this point we're only supporting 2 channels with fixed slot
settings. I've added a comment to state
that we're using the tdm_slot at the moment as an indicator to
override the slot width. Do you think
that is enough for now?.
Thanks,
CK
>
> On the H3 (and all related ones), the CHAN_CFG_TX_SLOT_NUM and
> _RX_SLOT_NUM fields in the CHAN_CFG register need to be set to the
> number of slots as well.
>
> Maxime
>
> --
> Maxime Ripard, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com
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next prev parent reply other threads:[~2019-08-16 6:27 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-14 6:08 [PATCH v5 00/15] ASoC: sun4i-i2s: Updates to the driver codekipper
2019-08-14 6:08 ` [PATCH v5 01/15] ASoC: sun4i-i2s: Add regmap field to sign extend sample codekipper
2019-08-14 6:43 ` Maxime Ripard
2019-08-14 11:24 ` Code Kipper
2019-08-14 6:08 ` [PATCH v5 02/15] ASoC: sun4i-i2s: Add set_tdm_slot functionality codekipper
2019-08-14 7:09 ` Maxime Ripard
2019-08-16 6:27 ` Code Kipper [this message]
2019-08-14 9:30 ` Mark Brown
2019-08-16 6:22 ` Code Kipper
2019-08-14 6:08 ` [PATCH v5 03/15] ASoC: sun4i-i2s: Correct divider calculations codekipper
2019-08-14 7:13 ` Maxime Ripard
2019-08-14 9:31 ` Mark Brown
2019-08-14 6:08 ` [PATCH v5 04/15] ASoC: sun4i-i2s: Support more formats on newer SoCs codekipper
2019-08-14 7:16 ` Maxime Ripard
2019-08-14 11:23 ` Code Kipper
2019-08-14 6:08 ` [PATCH v5 05/15] ASoC: sun4i-i2s: Add functions for RX and TX channel offsets codekipper
2019-08-14 6:08 ` [PATCH v5 06/15] ASoC: sun4i-i2s: Add functions for RX and TX channel enables codekipper
2019-08-14 6:08 ` [PATCH v5 07/15] ASoC: sun4i-i2s: Add functions for RX and TX channel selects codekipper
2019-08-14 6:08 ` [PATCH v5 08/15] ASoC: sun4i-i2s: Add functions for channel mapping codekipper
2019-08-14 6:08 ` [PATCH v5 09/15] clk: sunxi-ng: h6: Allow I2S to change parent rate codekipper
2019-08-21 4:07 ` [linux-sunxi] " Chen-Yu Tsai
2019-08-21 5:52 ` Code Kipper
2019-08-21 6:01 ` Chen-Yu Tsai
2019-08-21 9:19 ` Code Kipper
2019-08-21 9:35 ` [linux-sunxi] " Chen-Yu Tsai
2019-08-14 6:08 ` [PATCH v5 10/15] dt-bindings: ASoC: sun4i-i2s: Add H6 compatible codekipper
2019-08-14 6:08 ` [PATCH v5 11/15] ASoC: sun4i-i2s: Add support for H6 I2S codekipper
2019-08-14 7:57 ` Jernej Škrabec
2019-08-14 11:08 ` Code Kipper
2019-08-14 6:08 ` [PATCH v5 12/15] ASoC: sun4i-i2s: Add multi-lane functionality codekipper
2019-08-14 7:20 ` Maxime Ripard
2019-08-14 11:16 ` Code Kipper
2019-08-14 8:27 ` [linux-sunxi] " Jernej Škrabec
2019-08-14 6:08 ` [PATCH v5 13/15] ASoC: sun4i-i2s: Add multichannel functionality codekipper
2019-08-14 6:08 ` [PATCH v5 14/15] ASoc: sun4i-i2s: Add 20, 24 and 32 bit support codekipper
2019-08-14 8:28 ` [linux-sunxi] " Jernej Škrabec
2019-08-14 9:03 ` Code Kipper
2019-08-14 6:08 ` [PATCH v5 15/15] ASoC: sun4i-i2s: Adjust regmap settings codekipper
2019-08-14 7:20 ` Maxime Ripard
2019-08-14 11:31 ` [linux-sunxi] " Jernej Škrabec
2019-08-14 8:37 ` [linux-sunxi] " Jernej Škrabec
2019-08-14 9:02 ` Code Kipper
2019-08-14 11:31 ` Chen-Yu Tsai
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