diff mbox series

[v8,07/14] ASoC: sun4i-i2s: Fix setting of FIFO modes

Message ID 20201026185239.379417-8-peron.clem@gmail.com
State Superseded
Headers show
Series Add Allwinner H3/H5/H6/A64 HDMI audio | expand

Commit Message

Clément Péron Oct. 26, 2020, 6:52 p.m. UTC 
From: Samuel Holland <samuel@sholland.org>

Because SUN4I_I2S_FIFO_CTRL_REG is volatile, writes done while the
regmap is cache-only are ignored. To work around this, move the
configuration to a callback that runs while the ASoC core has a
runtime PM reference to the device.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
 sound/soc/sunxi/sun4i-i2s.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

Comments

Maxime Ripard Oct. 27, 2020, 5:51 p.m. UTC | #1 
On Mon, Oct 26, 2020 at 07:52:32PM +0100, Clément Péron wrote:
> From: Samuel Holland <samuel@sholland.org>
> 
> Because SUN4I_I2S_FIFO_CTRL_REG is volatile, writes done while the
> regmap is cache-only are ignored. To work around this, move the
> configuration to a callback that runs while the ASoC core has a
> runtime PM reference to the device.
> 
> Signed-off-by: Samuel Holland <samuel@sholland.org>
> Reviewed-by: Chen-Yu Tsai <wens@csie.org>
> Signed-off-by: Clément Péron <peron.clem@gmail.com>

Acked-by: Maxime Ripard <mripard@kernel.org>

Maxime
diff mbox series

Patch

diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index dee8688f0d37..703327dc8606 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -595,6 +595,13 @@  static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
 		return ret;
 	}
 
+	/* Set significant bits in our FIFOs */
+	regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
+			   SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK |
+			   SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK,
+			   SUN4I_I2S_FIFO_CTRL_TX_MODE(1) |
+			   SUN4I_I2S_FIFO_CTRL_RX_MODE(1));
+
 	switch (params_physical_width(params)) {
 	case 16:
 		width = DMA_SLAVE_BUSWIDTH_2_BYTES;
@@ -923,13 +930,6 @@  static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 		return ret;
 	}
 
-	/* Set significant bits in our FIFOs */
-	regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
-			   SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK |
-			   SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK,
-			   SUN4I_I2S_FIFO_CTRL_TX_MODE(1) |
-			   SUN4I_I2S_FIFO_CTRL_RX_MODE(1));
-
 	i2s->format = fmt;
 
 	return 0;