diff options
Diffstat (limited to 'sound/soc/stm/stm32_spdifrx.c')
-rw-r--r-- | sound/soc/stm/stm32_spdifrx.c | 40 |
1 files changed, 26 insertions, 14 deletions
diff --git a/sound/soc/stm/stm32_spdifrx.c b/sound/soc/stm/stm32_spdifrx.c index 56d79695577c..ac9ae434237a 100644 --- a/sound/soc/stm/stm32_spdifrx.c +++ b/sound/soc/stm/stm32_spdifrx.c @@ -11,7 +11,6 @@ #include <linux/delay.h> #include <linux/module.h> #include <linux/of_platform.h> -#include <linux/pinctrl/consumer.h> #include <linux/regmap.h> #include <linux/reset.h> @@ -204,6 +203,7 @@ * @slave_config: dma slave channel runtime config pointer * @phys_addr: SPDIFRX registers physical base address * @lock: synchronization enabling lock + * @irq_lock: prevent race condition with IRQ on stream state * @cs: channel status buffer * @ub: user data buffer * @irq: SPDIFRX interrupt line @@ -224,6 +224,7 @@ struct stm32_spdifrx_data { struct dma_slave_config slave_config; dma_addr_t phys_addr; spinlock_t lock; /* Sync enabling lock */ + spinlock_t irq_lock; /* Prevent race condition on stream state */ unsigned char cs[SPDIFRX_CS_BYTES_NB]; unsigned char ub[SPDIFRX_UB_BYTES_NB]; int irq; @@ -304,6 +305,7 @@ static void stm32_spdifrx_dma_ctrl_stop(struct stm32_spdifrx_data *spdifrx) static int stm32_spdifrx_start_sync(struct stm32_spdifrx_data *spdifrx) { int cr, cr_mask, imr, ret; + unsigned long flags; /* Enable IRQs */ imr = SPDIFRX_IMR_IFEIE | SPDIFRX_IMR_SYNCDIE | SPDIFRX_IMR_PERRIE; @@ -311,7 +313,7 @@ static int stm32_spdifrx_start_sync(struct stm32_spdifrx_data *spdifrx) if (ret) return ret; - spin_lock(&spdifrx->lock); + spin_lock_irqsave(&spdifrx->lock, flags); spdifrx->refcount++; @@ -344,7 +346,7 @@ static int stm32_spdifrx_start_sync(struct stm32_spdifrx_data *spdifrx) "Failed to start synchronization\n"); } - spin_unlock(&spdifrx->lock); + spin_unlock_irqrestore(&spdifrx->lock, flags); return ret; } @@ -352,11 +354,12 @@ static int stm32_spdifrx_start_sync(struct stm32_spdifrx_data *spdifrx) static void stm32_spdifrx_stop(struct stm32_spdifrx_data *spdifrx) { int cr, cr_mask, reg; + unsigned long flags; - spin_lock(&spdifrx->lock); + spin_lock_irqsave(&spdifrx->lock, flags); if (--spdifrx->refcount) { - spin_unlock(&spdifrx->lock); + spin_unlock_irqrestore(&spdifrx->lock, flags); return; } @@ -375,7 +378,7 @@ static void stm32_spdifrx_stop(struct stm32_spdifrx_data *spdifrx) regmap_read(spdifrx->regmap, STM32_SPDIFRX_DR, ®); regmap_read(spdifrx->regmap, STM32_SPDIFRX_CSR, ®); - spin_unlock(&spdifrx->lock); + spin_unlock_irqrestore(&spdifrx->lock, flags); } static int stm32_spdifrx_dma_ctrl_register(struct device *dev, @@ -462,8 +465,6 @@ static int stm32_spdifrx_get_ctrl_data(struct stm32_spdifrx_data *spdifrx) memset(spdifrx->cs, 0, SPDIFRX_CS_BYTES_NB); memset(spdifrx->ub, 0, SPDIFRX_UB_BYTES_NB); - pinctrl_pm_select_default_state(&spdifrx->pdev->dev); - ret = stm32_spdifrx_dma_ctrl_start(spdifrx); if (ret < 0) return ret; @@ -495,7 +496,6 @@ static int stm32_spdifrx_get_ctrl_data(struct stm32_spdifrx_data *spdifrx) end: clk_disable_unprepare(spdifrx->kclk); - pinctrl_pm_select_sleep_state(&spdifrx->pdev->dev); return ret; } @@ -643,7 +643,6 @@ static const struct regmap_config stm32_h7_spdifrx_regmap_conf = { static irqreturn_t stm32_spdifrx_isr(int irq, void *devid) { struct stm32_spdifrx_data *spdifrx = (struct stm32_spdifrx_data *)devid; - struct snd_pcm_substream *substream = spdifrx->substream; struct platform_device *pdev = spdifrx->pdev; unsigned int cr, mask, sr, imr; unsigned int flags; @@ -711,14 +710,19 @@ static irqreturn_t stm32_spdifrx_isr(int irq, void *devid) regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR, SPDIFRX_CR_SPDIFEN_MASK, cr); - if (substream) - snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED); + spin_lock(&spdifrx->irq_lock); + if (spdifrx->substream) + snd_pcm_stop(spdifrx->substream, + SNDRV_PCM_STATE_DISCONNECTED); + spin_unlock(&spdifrx->irq_lock); return IRQ_HANDLED; } - if (err_xrun && substream) - snd_pcm_stop_xrun(substream); + spin_lock(&spdifrx->irq_lock); + if (err_xrun && spdifrx->substream) + snd_pcm_stop_xrun(spdifrx->substream); + spin_unlock(&spdifrx->irq_lock); return IRQ_HANDLED; } @@ -727,9 +731,12 @@ static int stm32_spdifrx_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) { struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai); + unsigned long flags; int ret; + spin_lock_irqsave(&spdifrx->irq_lock, flags); spdifrx->substream = substream; + spin_unlock_irqrestore(&spdifrx->irq_lock, flags); ret = clk_prepare_enable(spdifrx->kclk); if (ret) @@ -805,8 +812,12 @@ static void stm32_spdifrx_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) { struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai); + unsigned long flags; + spin_lock_irqsave(&spdifrx->irq_lock, flags); spdifrx->substream = NULL; + spin_unlock_irqrestore(&spdifrx->irq_lock, flags); + clk_disable_unprepare(spdifrx->kclk); } @@ -911,6 +922,7 @@ static int stm32_spdifrx_probe(struct platform_device *pdev) spdifrx->pdev = pdev; init_completion(&spdifrx->cs_completion); spin_lock_init(&spdifrx->lock); + spin_lock_init(&spdifrx->irq_lock); platform_set_drvdata(pdev, spdifrx); |