From mboxrd@z Thu Jan 1 00:00:00 1970 From: codekipper-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org Subject: [PATCH v2 1/6] ASoC: sun4i-i2s: Add slot width override Date: Mon, 12 Mar 2018 16:57:48 +0100 Message-ID: <20180312155753.9478-2-codekipper@gmail.com> References: <20180312155753.9478-1-codekipper@gmail.com> Reply-To: codekipper-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Return-path: Sender: linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org In-Reply-To: <20180312155753.9478-1-codekipper-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , To: maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org, wens-jdAy2FN1RRM@public.gmane.org, linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, lgirdwood-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw@public.gmane.org, be17068-p0aYb1w59bq9tCD/VL7h6Q@public.gmane.org, Marcus Cooper List-Id: alsa-devel@alsa-project.org From: Marcus Cooper Some codecs require a different amount of a bit clocks per frame than what is calculated by using the sample width. Use a slot width override property to provide this mechanism. Signed-off-by: Marcus Cooper --- Documentation/devicetree/bindings/sound/sun4i-i2s.txt | 5 +++++ sound/soc/sunxi/sun4i-i2s.c | 15 ++++++++++++--- 2 files changed, 17 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/sound/sun4i-i2s.txt b/Documentation/devicetree/bindings/sound/sun4i-i2s.txt index b9d50d6cdef3..48addef65b8f 100644 --- a/Documentation/devicetree/bindings/sound/sun4i-i2s.txt +++ b/Documentation/devicetree/bindings/sound/sun4i-i2s.txt @@ -28,6 +28,11 @@ Required properties for the following compatibles: - "allwinner,sun8i-h3-i2s" - resets: phandle to the reset line for this codec +Optional properties: +- allwinner,slot-width-override:if this property is present then the dai is + configured to extend the slot width to the + value specified. Min 8, Max 32. + Example: i2s0: i2s@1c22400 { diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c index a4aa931ebfae..873054a6c3be 100644 --- a/sound/soc/sunxi/sun4i-i2s.c +++ b/sound/soc/sunxi/sun4i-i2s.c @@ -193,6 +193,8 @@ struct sun4i_i2s { struct regmap_field *field_rxchansel; const struct sun4i_i2s_quirks *variant; + + unsigned int slot_width; }; struct sun4i_i2s_clk_div { @@ -344,7 +346,7 @@ 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)); return 0; } @@ -418,7 +420,8 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream, sr + i2s->variant->fmt_offset); return sun4i_i2s_set_clk_rate(dai, params_rate(params), - params_width(params)); + i2s->slot_width ? + i2s->slot_width : params_width(params)); } static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) @@ -1029,7 +1032,7 @@ static int sun4i_i2s_probe(struct platform_device *pdev) struct sun4i_i2s *i2s; struct resource *res; void __iomem *regs; - int irq, ret; + int irq, ret, val; i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL); if (!i2s) @@ -1096,6 +1099,12 @@ static int sun4i_i2s_probe(struct platform_device *pdev) i2s->capture_dma_data.addr = res->start + SUN4I_I2S_FIFO_RX_REG; i2s->capture_dma_data.maxburst = 8; + if (!of_property_read_u32(pdev->dev.of_node, + "allwinner,slot-width-override", &val)) { + if (val >= 8 && val <= 32) + i2s->slot_width = val; + } + pm_runtime_enable(&pdev->dev); if (!pm_runtime_enabled(&pdev->dev)) { ret = sun4i_i2s_runtime_resume(&pdev->dev); -- 2.16.2