diff mbox series

[v2] ASoC: rockchip: i2s: Fix concurrency between tx/rx

Message ID 1630305525-65759-1-git-send-email-sugar.zhang@rock-chips.com (mailing list archive)
State New
Headers show
Series [v2] ASoC: rockchip: i2s: Fix concurrency between tx/rx | expand

Commit Message

sugar zhang Aug. 30, 2021, 6:38 a.m. UTC
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 v2:
- Fix compile error.

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

Comments

Mark Brown Sept. 1, 2021, 4:31 p.m. UTC | #1
On Mon, Aug 30, 2021 at 02:38:45PM +0800, Sugar Zhang wrote:
> This patch adds lock to fix comcurrency between tx/rx
> to fix 'rockchip-i2s ff070000.i2s; fail to clear'

This doesn't apply against current code, please check and resend.
Mark Brown Sept. 3, 2021, 6:04 p.m. UTC | #2
On Mon, 30 Aug 2021 14:38:45 +0800, Sugar Zhang wrote:
> 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
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: rockchip: i2s: Fix concurrency between tx/rx
      commit: fcb958ee8e832e9cdf43408535207e15f14af755

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark
diff mbox series

Patch

diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c
index c7dc350..88e340f 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>
 
@@ -49,6 +50,7 @@  struct rk_i2s_dev {
 	bool rx_start;
 	bool is_master_mode;
 	const struct rk_i2s_pins *pins;
+	spinlock_t lock; /* tx/rx lock */
 };
 
 static int i2s_runtime_suspend(struct device *dev)
@@ -92,6 +94,7 @@  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);
@@ -132,6 +135,7 @@  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)
@@ -139,6 +143,7 @@  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);
@@ -179,6 +184,7 @@  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,
@@ -589,6 +595,7 @@  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");