From 1f93a7dfd1f8d5ff7a5c53246c7534fe2332d6f4 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 02:46:07 +0000
Subject: [PATCH] add audio
---
kernel/sound/pci/echoaudio/echoaudio.h | 16 ++++++++++------
1 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/kernel/sound/pci/echoaudio/echoaudio.h b/kernel/sound/pci/echoaudio/echoaudio.h
index be4d048..0afe13f 100644
--- a/kernel/sound/pci/echoaudio/echoaudio.h
+++ b/kernel/sound/pci/echoaudio/echoaudio.h
@@ -298,7 +298,12 @@
* the current dma position
* (lower 32 bits only)
*/
- u32 last_counter; /* The last position, which is used
+ u32 last_period; /* Counter position last time a
+ * period elapsed
+ */
+ u32 last_counter; /* Used exclusively by pcm_pointer
+ * under PCM core locks.
+ * The last position, which is used
* to compute...
*/
u32 position; /* ...the number of bytes tranferred
@@ -332,11 +337,10 @@
struct echoaudio {
spinlock_t lock;
struct snd_pcm_substream *substream[DSP_MAXPIPES];
- int last_period[DSP_MAXPIPES];
struct mutex mode_mutex;
u16 num_digital_modes, digital_mode_list[6];
u16 num_clock_sources, clock_source_list[10];
- atomic_t opencount;
+ unsigned int opencount; /* protected by mode_mutex */
struct snd_kcontrol *clock_src_ctl;
struct snd_pcm *analog_pcm, *digital_pcm;
struct snd_card *card;
@@ -353,8 +357,8 @@
struct timer_list timer;
char tinuse; /* Timer in use */
char midi_full; /* MIDI output buffer is full */
- char can_set_rate;
- char rate_set;
+ char can_set_rate; /* protected by mode_mutex */
+ char rate_set; /* protected by mode_mutex */
/* This stuff is used mainly by the lowlevel code */
struct comm_page *comm_page; /* Virtual address of the memory
@@ -415,7 +419,7 @@
short asic_code; /* Current ASIC code */
u32 comm_page_phys; /* Physical address of the
* memory seen by DSP */
- volatile u32 __iomem *dsp_registers; /* DSP's register base */
+ u32 __iomem *dsp_registers; /* DSP's register base */
u32 active_mask; /* Chs. active mask or
* punks out */
#ifdef CONFIG_PM_SLEEP
--
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