linux-kernel - [RFC PATCH 18/34] ASoC: sun8i-codec: Allow all clock inversion permutations

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Date:   Mon, 17 Feb 2020 00:42:34 -0600
From:   Samuel Holland <samuel@...lland.org>
To:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Vasily Khoruzhick <anarsoul@...il.com>,
        Mylène Josserand 
        <mylene.josserand@...e-electrons.com>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:     alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Samuel Holland <samuel@...lland.org>
Subject: [RFC PATCH 18/34] ASoC: sun8i-codec: Allow all clock inversion permutations

Since the hardware has separate bits for BCLK and LRCK inversion, we can
support any combination of normal and inverted clocks.

Signed-off-by: Samuel Holland <samuel@...lland.org>
---
 sound/soc/sunxi/sun8i-codec.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/sound/soc/sunxi/sun8i-codec.c b/sound/soc/sunxi/sun8i-codec.c
index 36ce281286b5..f8cde149a92b 100644
--- a/sound/soc/sunxi/sun8i-codec.c
+++ b/sound/soc/sunxi/sun8i-codec.c
@@ -41,8 +41,7 @@
 #define SUN8I_SYS_SR_CTRL_AIF2_FS			8
 #define SUN8I_AIF1CLK_CTRL				0x040
 #define SUN8I_AIF1CLK_CTRL_AIF1_MSTR_MOD		15
-#define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_INV		14
-#define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_INV		13
+#define SUN8I_AIF1CLK_CTRL_AIF1_CLK_INV			13
 #define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV		9
 #define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV		6
 #define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ		4
@@ -81,6 +80,7 @@
 
 #define SUN8I_SYS_SR_CTRL_AIF1_FS_MASK		GENMASK(15, 12)
 #define SUN8I_SYS_SR_CTRL_AIF2_FS_MASK		GENMASK(11, 8)
+#define SUN8I_AIF1CLK_CTRL_AIF1_CLK_INV_MASK	GENMASK(14, 13)
 #define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV_MASK	GENMASK(12, 9)
 #define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_MASK	GENMASK(8, 6)
 #define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_MASK	GENMASK(5, 4)
@@ -205,16 +205,18 @@ static int sun8i_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 	case SND_SOC_DAIFMT_NB_NF: /* Normal */
 		value = 0x0;
 		break;
-	case SND_SOC_DAIFMT_IB_IF: /* Inversion */
+	case SND_SOC_DAIFMT_NB_IF: /* Inverted LRCK */
 		value = 0x1;
 		break;
+	case SND_SOC_DAIFMT_IB_NF: /* Inverted BCLK */
+		value = 0x2;
+		break;
+	case SND_SOC_DAIFMT_IB_IF: /* Both inverted */
+		value = 0x3;
+		break;
 	default:
 		return -EINVAL;
 	}
-	regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL,
-			   BIT(SUN8I_AIF1CLK_CTRL_AIF1_BCLK_INV),
-			   value << SUN8I_AIF1CLK_CTRL_AIF1_BCLK_INV);
-
 	/*
 	 * It appears that the DAI and the codec in the A33 SoC don't
 	 * share the same polarity for the LRCK signal when they mean
@@ -227,8 +229,8 @@ static int sun8i_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 	 */
 	value ^= scodec->inverted_lrck;
 	regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL,
-			   BIT(SUN8I_AIF1CLK_CTRL_AIF1_LRCK_INV),
-			   value << SUN8I_AIF1CLK_CTRL_AIF1_LRCK_INV);
+			   SUN8I_AIF1CLK_CTRL_AIF1_CLK_INV_MASK,
+			   value << SUN8I_AIF1CLK_CTRL_AIF1_CLK_INV);
 
 	/* DAI format */
 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
-- 
2.24.1