This patch adds lock to fix comcurrency between tx/rx to fix 'rockchip-i2s ff070000.i2s; fail to clear'

Considering the situation;

tx stream rx stream | | | disable enable | | reset

After this patch:

lock | tx stream | enable | unlock -------- --------- lock | rx stream | disable | reset | unlock

Signed-off-by: Sugar Zhang sugar.zhang@rock-chips.com ---

Changes in v3: - Rebase and fix conflicts.

Changes in v2: - Fix compile error.

sound/soc/rockchip/rockchip_i2s.c | 7 +++++++ 1 file changed, 7 insertions(+)

diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c index 53e0b4a..7e89f5b 100644 --- a/sound/soc/rockchip/rockchip_i2s.c +++ b/sound/soc/rockchip/rockchip_i2s.c @@ -15,6 +15,7 @@ #include <linux/clk.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> +#include <linux/spinlock.h> #include <sound/pcm_params.h> #include <sound/dmaengine_pcm.h>

@@ -53,6 +54,7 @@ struct rk_i2s_dev { bool is_master_mode; const struct rk_i2s_pins *pins; unsigned int bclk_ratio; + spinlock_t lock; /* tx/rx lock */ };

static int i2s_runtime_suspend(struct device *dev) @@ -96,6 +98,7 @@ static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on) unsigned int val = 0; int retry = 10;

+ spin_lock(&i2s->lock); if (on) { regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_ENABLE); @@ -136,6 +139,7 @@ static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on) } } } + spin_unlock(&i2s->lock); }

static void rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on) @@ -143,6 +147,7 @@ static void rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on) unsigned int val = 0; int retry = 10;

+ spin_lock(&i2s->lock); if (on) { regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_ENABLE); @@ -183,6 +188,7 @@ static void rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on) } } } + spin_unlock(&i2s->lock); }

static int rockchip_i2s_set_fmt(struct snd_soc_dai *cpu_dai, @@ -684,6 +690,7 @@ static int rockchip_i2s_probe(struct platform_device *pdev) if (!i2s) return -ENOMEM;

+ spin_lock_init(&i2s->lock); i2s->dev = &pdev->dev;

i2s->grf = syscon_regmap_lookup_by_phandle(node, "rockchip,grf");