修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/sound/drivers/pcsp/pcsp_lib.c
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@@ -23,10 +23,10 @@
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 #define DMIX_WANTS_S16	1
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 /*
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- * Call snd_pcm_period_elapsed in a tasklet
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+ * Call snd_pcm_period_elapsed in a work
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  * This avoids spinlock messes and long-running irq contexts
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  */
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-static void pcsp_call_pcm_elapsed(unsigned long priv)
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+static void pcsp_call_pcm_elapsed(struct work_struct *work)
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 {
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 	if (atomic_read(&pcsp_chip.timer_active)) {
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 		struct snd_pcm_substream *substream;
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@@ -36,7 +36,7 @@
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 	}
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 }
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-static DECLARE_TASKLET(pcsp_pcm_tasklet, pcsp_call_pcm_elapsed, 0);
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+static DECLARE_WORK(pcsp_pcm_work, pcsp_call_pcm_elapsed);
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 /* write the port and returns the next expire time in ns;
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  * called at the trigger-start and in hrtimer callback
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@@ -119,11 +119,9 @@
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 	if (periods_elapsed) {
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 		chip->period_ptr += periods_elapsed * period_bytes;
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 		chip->period_ptr %= buffer_bytes;
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+		queue_work(system_highpri_wq, &pcsp_pcm_work);
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 	}
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 	spin_unlock_irqrestore(&chip->substream_lock, flags);
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-
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-	if (periods_elapsed)
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-		tasklet_schedule(&pcsp_pcm_tasklet);
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 }
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 enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
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@@ -196,7 +194,7 @@
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 	pcsp_stop_playing(chip);
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 	local_irq_enable();
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 	hrtimer_cancel(&chip->timer);
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-	tasklet_kill(&pcsp_pcm_tasklet);
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+	cancel_work_sync(&pcsp_pcm_work);
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 }
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 static int snd_pcsp_playback_close(struct snd_pcm_substream *substream)
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@@ -214,12 +212,7 @@
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 				       struct snd_pcm_hw_params *hw_params)
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 {
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 	struct snd_pcsp *chip = snd_pcm_substream_chip(substream);
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-	int err;
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 	pcsp_sync_stop(chip);
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-	err = snd_pcm_lib_malloc_pages(substream,
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-				      params_buffer_bytes(hw_params));
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-	if (err < 0)
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-		return err;
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 	return 0;
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 }
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@@ -230,7 +223,7 @@
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 	printk(KERN_INFO "PCSP: hw_free called\n");
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 #endif
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 	pcsp_sync_stop(chip);
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-	return snd_pcm_lib_free_pages(substream);
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+	return 0;
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 }
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 static int snd_pcsp_playback_prepare(struct snd_pcm_substream *substream)
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@@ -327,7 +320,6 @@
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 static const struct snd_pcm_ops snd_pcsp_playback_ops = {
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 	.open = snd_pcsp_playback_open,
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 	.close = snd_pcsp_playback_close,
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-	.ioctl = snd_pcm_lib_ioctl,
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 	.hw_params = snd_pcsp_playback_hw_params,
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 	.hw_free = snd_pcsp_playback_hw_free,
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 	.prepare = snd_pcsp_playback_prepare,
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@@ -350,11 +342,11 @@
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 	chip->pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
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 	strcpy(chip->pcm->name, "pcsp");
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-	snd_pcm_lib_preallocate_pages_for_all(chip->pcm,
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-					      SNDRV_DMA_TYPE_CONTINUOUS,
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-					      snd_dma_continuous_data
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-					      (GFP_KERNEL), PCSP_BUFFER_SIZE,
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-					      PCSP_BUFFER_SIZE);
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+	snd_pcm_set_managed_buffer_all(chip->pcm,
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+				       SNDRV_DMA_TYPE_CONTINUOUS,
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+				       NULL,
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+				       PCSP_BUFFER_SIZE,
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+				       PCSP_BUFFER_SIZE);
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 	return 0;
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 }