linux-kernel - Re: [PATCH 04/22] ASoC: samsung: i2s: Fix prescaler setting for the secondary DAI

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Date:   Mon, 11 Feb 2019 14:37:01 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Sylwester Nawrocki <s.nawrocki@...sung.com>
Cc:     broonie@...nel.org, lgirdwood@...il.com, sbkim73@...sung.com,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Bartłomiej Żołnierkiewicz 
        <b.zolnierkie@...sung.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org,
        "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>
Subject: Re: [PATCH 04/22] ASoC: samsung: i2s: Fix prescaler setting for the
 secondary DAI

On Thu, 7 Feb 2019 at 18:01, Sylwester Nawrocki <s.nawrocki@...sung.com> wrote:
>
> Make sure i2s->rclk_srcrate is properly initialized also during
> playback through the secondary DAI.
>
> Signed-off-by: Sylwester Nawrocki <s.nawrocki@...sung.com>
> ---
>  sound/soc/samsung/i2s.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
> index 9d3dcb2204fe..d5ddad23d5e5 100644
> --- a/sound/soc/samsung/i2s.c
> +++ b/sound/soc/samsung/i2s.c
> @@ -604,6 +604,7 @@ static int i2s_set_fmt(struct snd_soc_dai *dai,
>         unsigned int fmt)
>  {
>         struct i2s_dai *i2s = to_info(dai);
> +       struct i2s_dai *other = get_other_dai(i2s);
>         int lrp_shift, sdf_shift, sdf_mask, lrp_rlow, mod_slave;
>         u32 mod, tmp = 0;
>         unsigned long flags;
> @@ -661,7 +662,8 @@ static int i2s_set_fmt(struct snd_soc_dai *dai,
>                  * CLK_I2S_RCLK_SRC clock is not exposed so we ensure any
>                  * clock configuration assigned in DT is not overwritten.
>                  */
> -               if (i2s->rclk_srcrate == 0 && i2s->clk_data.clks == NULL)
> +               if (i2s->rclk_srcrate == 0 && i2s->clk_data.clks == NULL &&
> +                   other->clk_data.clks == NULL)
>                         i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
>                                                         0, SND_SOC_CLOCK_IN);
>                 break;
> @@ -699,6 +701,7 @@ static int i2s_hw_params(struct snd_pcm_substream *substream,
>         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
>  {
>         struct i2s_dai *i2s = to_info(dai);
> +       struct i2s_dai *other = get_other_dai(i2s);
>         u32 mod, mask = 0, val = 0;
>         struct clk *rclksrc;
>         unsigned long flags;
> @@ -784,6 +787,9 @@ static int i2s_hw_params(struct snd_pcm_substream *substream,
>         i2s->frmclk = params_rate(params);
>
>         rclksrc = i2s->clk_table[CLK_I2S_RCLK_SRC];
> +       if (!rclksrc || IS_ERR(rclksrc))

IS_ERR_OR_NULL

Best regards,
Krzysztof

> +               rclksrc = other->clk_table[CLK_I2S_RCLK_SRC];
> +
>         if (rclksrc && !IS_ERR(rclksrc))
>                 i2s->rclk_srcrate = clk_get_rate(rclksrc);
>
> --
> 2.20.1
>