From 6778948f9de86c3cfaf36725a7c87dcff9ba247f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 08:20:59 +0000
Subject: [PATCH] kernel_5.10 no rt
---
kernel/sound/soc/rockchip/rockchip_multi_dais_pcm.c | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/kernel/sound/soc/rockchip/rockchip_multi_dais_pcm.c b/kernel/sound/soc/rockchip/rockchip_multi_dais_pcm.c
index d69395f..88daa5d 100644
--- a/kernel/sound/soc/rockchip/rockchip_multi_dais_pcm.c
+++ b/kernel/sound/soc/rockchip/rockchip_multi_dais_pcm.c
@@ -20,6 +20,10 @@
#define MAX_FIFO_SIZE 32 /* max fifo size in frames */
#define SND_DMAENGINE_MPCM_DRV_NAME "snd_dmaengine_mpcm"
+static unsigned int prealloc_buffer_size_kbytes = 512;
+module_param(prealloc_buffer_size_kbytes, uint, 0444);
+MODULE_PARM_DESC(prealloc_buffer_size_kbytes, "Preallocate DMA buffer size (KB).");
+
struct dmaengine_mpcm {
struct rk_mdais_dev *mdais;
struct dma_chan *tx_chans[MAX_DAIS];
@@ -563,7 +567,7 @@
size_t max_buffer_size;
unsigned int i;
- prealloc_buffer_size = 512 * 1024;
+ prealloc_buffer_size = prealloc_buffer_size_kbytes * 1024;
max_buffer_size = SIZE_MAX;
for (i = SNDRV_PCM_STREAM_PLAYBACK; i <= SNDRV_PCM_STREAM_CAPTURE; i++) {
@@ -685,6 +689,9 @@
if (!pcm)
return -ENOMEM;
+#ifdef CONFIG_DEBUG_FS
+ pcm->component.debugfs_prefix = "dma";
+#endif
pcm->mdais = mdais;
for (i = 0; i < num; i++) {
child = mdais->dais[i].dev;
--
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