[alsa-devel] [PATCH 25/53] ALSA: x86: Fold intel_hdmi_audio_if.c into main file
Takashi Iwai
tiwai at suse.de
Thu Feb 2 18:02:39 CET 2017
As the very last step, we fold intel_hdmi_audio_if.c into the main
file, intel_hdmi_audio.c. This is merely a cleanup, and no functional
change.
By this move, we can mark all functions and variables as static, which
allows the compiler more optimizations.
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
sound/x86/Makefile | 3 +-
sound/x86/intel_hdmi_audio.c | 391 ++++++++++++++++++++++++++++++++++++++--
sound/x86/intel_hdmi_audio.h | 31 ----
sound/x86/intel_hdmi_audio_if.c | 390 ---------------------------------------
4 files changed, 376 insertions(+), 439 deletions(-)
delete mode 100644 sound/x86/intel_hdmi_audio_if.c
diff --git a/sound/x86/Makefile b/sound/x86/Makefile
index 3c0bf63333e6..7ff919808320 100644
--- a/sound/x86/Makefile
+++ b/sound/x86/Makefile
@@ -1,5 +1,4 @@
snd-hdmi-lpe-audio-objs += \
- intel_hdmi_audio.o \
- intel_hdmi_audio_if.o
+ intel_hdmi_audio.o
obj-$(CONFIG_HDMI_LPE_AUDIO) += snd-hdmi-lpe-audio.o
diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c
index 1594f826cf31..effe93b58273 100644
--- a/sound/x86/intel_hdmi_audio.c
+++ b/sound/x86/intel_hdmi_audio.c
@@ -157,8 +157,7 @@ static const struct snd_pcm_hardware snd_intel_hadstream = {
};
/* Register access functions */
-
-int had_get_hwstate(struct snd_intelhad *intelhaddata)
+static int had_get_hwstate(struct snd_intelhad *intelhaddata)
{
/* Check for device presence -SW state */
if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
@@ -182,7 +181,8 @@ mid_hdmi_audio_write(struct snd_intelhad *ctx, u32 reg, u32 val)
iowrite32(val, ctx->mmio_start + ctx->had_config_offset + reg);
}
-int had_read_register(struct snd_intelhad *intelhaddata, u32 offset, u32 *data)
+static int had_read_register(struct snd_intelhad *intelhaddata,
+ u32 offset, u32 *data)
{
int retval;
@@ -203,7 +203,8 @@ static void fixup_dp_config(struct snd_intelhad *intelhaddata,
}
}
-int had_write_register(struct snd_intelhad *intelhaddata, u32 offset, u32 data)
+static int had_write_register(struct snd_intelhad *intelhaddata,
+ u32 offset, u32 data)
{
int retval;
@@ -216,8 +217,8 @@ int had_write_register(struct snd_intelhad *intelhaddata, u32 offset, u32 data)
return 0;
}
-int had_read_modify(struct snd_intelhad *intelhaddata, u32 offset,
- u32 data, u32 mask)
+static int had_read_modify(struct snd_intelhad *intelhaddata, u32 offset,
+ u32 data, u32 mask)
{
u32 val_tmp;
int retval;
@@ -280,7 +281,7 @@ static int had_read_modify_aud_config_v2(struct snd_intelhad *intelhaddata,
return had_read_modify(intelhaddata, AUD_CONFIG, data, mask);
}
-void snd_intelhad_enable_audio_int(struct snd_intelhad *ctx, bool enable)
+static void snd_intelhad_enable_audio_int(struct snd_intelhad *ctx, bool enable)
{
u32 status_reg;
@@ -292,8 +293,8 @@ void snd_intelhad_enable_audio_int(struct snd_intelhad *ctx, bool enable)
}
}
-void snd_intelhad_enable_audio(struct snd_intelhad *intelhaddata,
- bool enable)
+static void snd_intelhad_enable_audio(struct snd_intelhad *intelhaddata,
+ bool enable)
{
had_read_modify_aud_config_v2(intelhaddata, enable ? BIT(0) : 0,
BIT(0));
@@ -488,7 +489,7 @@ static int spk_to_chmap(int spk)
return 0;
}
-void had_build_channel_allocation_map(struct snd_intelhad *intelhaddata)
+static void had_build_channel_allocation_map(struct snd_intelhad *intelhaddata)
{
int i = 0, c = 0;
int spk_mask = 0;
@@ -675,7 +676,7 @@ static void snd_intelhad_prog_dip(struct snd_pcm_substream *substream,
*
* This function programs ring buffer address and length into registers.
*/
-int snd_intelhad_prog_buffer(struct snd_intelhad *intelhaddata,
+static int snd_intelhad_prog_buffer(struct snd_intelhad *intelhaddata,
int start, int end)
{
u32 ring_buf_addr, ring_buf_size, period_bytes;
@@ -732,7 +733,7 @@ int snd_intelhad_prog_buffer(struct snd_intelhad *intelhaddata,
return 0;
}
-int snd_intelhad_read_len(struct snd_intelhad *intelhaddata)
+static int snd_intelhad_read_len(struct snd_intelhad *intelhaddata)
{
int i, retval = 0;
u32 len[4];
@@ -939,7 +940,7 @@ static int snd_intelhad_prog_n(u32 aud_samp_freq, u32 *n_param,
return 0;
}
-void snd_intelhad_handle_underrun(struct snd_intelhad *intelhaddata)
+static void snd_intelhad_handle_underrun(struct snd_intelhad *intelhaddata)
{
u32 hdmi_status, i = 0;
@@ -1459,8 +1460,364 @@ static int hdmi_audio_mode_change(struct snd_intelhad *intelhaddata)
return retval;
}
-/*PCM operations structure and the calls back for the same */
-struct snd_pcm_ops snd_intelhad_playback_ops = {
+/*
+ * hdmi_lpe_audio_suspend - power management suspend function
+ *
+ * @pdev: platform device
+ *
+ * This function is called by client driver to suspend the
+ * hdmi audio.
+ */
+static int hdmi_lpe_audio_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ struct had_stream_data *had_stream;
+ unsigned long flag_irqs;
+ struct snd_pcm_substream *substream;
+ struct snd_intelhad *intelhaddata = platform_get_drvdata(pdev);
+
+ pr_debug("Enter:%s\n", __func__);
+
+ had_stream = &intelhaddata->stream_data;
+ substream = intelhaddata->stream_info.had_substream;
+
+ if (intelhaddata->dev->power.runtime_status != RPM_SUSPENDED) {
+ pr_err("audio stream is active\n");
+ return -EAGAIN;
+ }
+
+
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ pr_debug("had not connected\n");
+ return 0;
+ }
+
+ if (intelhaddata->drv_status == HAD_DRV_SUSPENDED) {
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ pr_debug("had already suspended\n");
+ return 0;
+ }
+
+ intelhaddata->drv_status = HAD_DRV_SUSPENDED;
+ pr_debug("%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_SUSPENDED\n",
+ __func__, __LINE__);
+
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ snd_intelhad_enable_audio_int(intelhaddata, false);
+ pr_debug("Exit:%s", __func__);
+ return 0;
+}
+
+/*
+ * hdmi_lpe_audio_resume - power management resume function
+ *
+ *@pdev: platform device
+ *
+ * This function is called by client driver to resume the
+ * hdmi audio.
+ */
+static int hdmi_lpe_audio_resume(struct platform_device *pdev)
+{
+ struct snd_intelhad *intelhaddata = platform_get_drvdata(pdev);
+ unsigned long flag_irqs;
+
+ pr_debug("Enter:%s\n", __func__);
+
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ pr_debug("had not connected\n");
+ return 0;
+ }
+
+ if (intelhaddata->drv_status != HAD_DRV_SUSPENDED) {
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ pr_err("had is not in suspended state\n");
+ return 0;
+ }
+
+ if (had_get_hwstate(intelhaddata)) {
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ pr_err("Failed to resume. Device not accessible\n");
+ return -ENODEV;
+ }
+
+ intelhaddata->drv_status = HAD_DRV_CONNECTED;
+ pr_debug("%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_DISCONNECTED\n",
+ __func__, __LINE__);
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ snd_intelhad_enable_audio_int(intelhaddata, true);
+ pr_debug("Exit:%s", __func__);
+ return 0;
+}
+
+static inline int had_chk_intrmiss(struct snd_intelhad *intelhaddata,
+ enum intel_had_aud_buf_type buf_id)
+{
+ int i, intr_count = 0;
+ enum intel_had_aud_buf_type buff_done;
+ u32 buf_size, buf_addr;
+ struct had_stream_data *had_stream;
+ unsigned long flag_irqs;
+
+ had_stream = &intelhaddata->stream_data;
+
+ buff_done = buf_id;
+
+ intr_count = snd_intelhad_read_len(intelhaddata);
+ if (intr_count > 1) {
+ /* In case of active playback */
+ pr_err("Driver detected %d missed buffer done interrupt(s)!!!!\n",
+ (intr_count - 1));
+ if (intr_count > 3)
+ return intr_count;
+
+ buf_id += (intr_count - 1);
+ /* Reprogram registers*/
+ for (i = buff_done; i < buf_id; i++) {
+ int j = i % 4;
+
+ buf_size = intelhaddata->buf_info[j].buf_size;
+ buf_addr = intelhaddata->buf_info[j].buf_addr;
+ had_write_register(intelhaddata,
+ AUD_BUF_A_LENGTH +
+ (j * HAD_REG_WIDTH), buf_size);
+ had_write_register(intelhaddata,
+ AUD_BUF_A_ADDR+(j * HAD_REG_WIDTH),
+ (buf_addr | BIT(0) | BIT(1)));
+ }
+ buf_id = buf_id % 4;
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ intelhaddata->buff_done = buf_id;
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ }
+
+ return intr_count;
+}
+
+static int had_process_buffer_done(struct snd_intelhad *intelhaddata)
+{
+ u32 len = 1;
+ enum intel_had_aud_buf_type buf_id;
+ enum intel_had_aud_buf_type buff_done;
+ struct pcm_stream_info *stream;
+ u32 buf_size;
+ struct had_stream_data *had_stream;
+ int intr_count;
+ enum had_status_stream stream_type;
+ unsigned long flag_irqs;
+
+ had_stream = &intelhaddata->stream_data;
+ stream = &intelhaddata->stream_info;
+ intr_count = 1;
+
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ pr_err("%s:Device already disconnected\n", __func__);
+ return 0;
+ }
+ buf_id = intelhaddata->curr_buf;
+ intelhaddata->buff_done = buf_id;
+ buff_done = intelhaddata->buff_done;
+ buf_size = intelhaddata->buf_info[buf_id].buf_size;
+ stream_type = had_stream->stream_type;
+
+ pr_debug("Enter:%s buf_id=%d\n", __func__, buf_id);
+
+ /* Every debug statement has an implication
+ * of ~5msec. Thus, avoid having >3 debug statements
+ * for each buffer_done handling.
+ */
+
+ /* Check for any intr_miss in case of active playback */
+ if (had_stream->stream_type == HAD_RUNNING_STREAM) {
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ intr_count = had_chk_intrmiss(intelhaddata, buf_id);
+ if (!intr_count || (intr_count > 3)) {
+ pr_err("HAD SW state in non-recoverable!!! mode\n");
+ pr_err("Already played stale data\n");
+ return 0;
+ }
+ buf_id += (intr_count - 1);
+ buf_id = buf_id % 4;
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ }
+
+ intelhaddata->buf_info[buf_id].is_valid = true;
+ if (intelhaddata->valid_buf_cnt-1 == buf_id) {
+ if (had_stream->stream_type >= HAD_RUNNING_STREAM)
+ intelhaddata->curr_buf = HAD_BUF_TYPE_A;
+ } else
+ intelhaddata->curr_buf = buf_id + 1;
+
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+
+ if (had_get_hwstate(intelhaddata)) {
+ pr_err("HDMI cable plugged-out\n");
+ return 0;
+ }
+
+ /*Reprogram the registers with addr and length*/
+ had_write_register(intelhaddata,
+ AUD_BUF_A_LENGTH + (buf_id * HAD_REG_WIDTH),
+ buf_size);
+ had_write_register(intelhaddata,
+ AUD_BUF_A_ADDR + (buf_id * HAD_REG_WIDTH),
+ intelhaddata->buf_info[buf_id].buf_addr |
+ BIT(0) | BIT(1));
+
+ had_read_register(intelhaddata,
+ AUD_BUF_A_LENGTH + (buf_id * HAD_REG_WIDTH),
+ &len);
+ pr_debug("%s:Enabled buf[%d]\n", __func__, buf_id);
+
+ /* In case of actual data,
+ * report buffer_done to above ALSA layer
+ */
+ buf_size = intelhaddata->buf_info[buf_id].buf_size;
+ if (stream_type >= HAD_RUNNING_STREAM) {
+ intelhaddata->stream_info.buffer_rendered +=
+ (intr_count * buf_size);
+ stream->period_elapsed(stream->had_substream);
+ }
+
+ return 0;
+}
+
+static int had_process_buffer_underrun(struct snd_intelhad *intelhaddata)
+{
+ enum intel_had_aud_buf_type buf_id;
+ struct pcm_stream_info *stream;
+ struct had_stream_data *had_stream;
+ enum had_status_stream stream_type;
+ unsigned long flag_irqs;
+ int drv_status;
+
+ had_stream = &intelhaddata->stream_data;
+ stream = &intelhaddata->stream_info;
+
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ buf_id = intelhaddata->curr_buf;
+ stream_type = had_stream->stream_type;
+ intelhaddata->buff_done = buf_id;
+ drv_status = intelhaddata->drv_status;
+ if (stream_type == HAD_RUNNING_STREAM)
+ intelhaddata->curr_buf = HAD_BUF_TYPE_A;
+
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+
+ pr_debug("Enter:%s buf_id=%d, stream_type=%d\n",
+ __func__, buf_id, stream_type);
+
+ snd_intelhad_handle_underrun(intelhaddata);
+
+ if (drv_status == HAD_DRV_DISCONNECTED) {
+ pr_err("%s:Device already disconnected\n", __func__);
+ return 0;
+ }
+
+ if (stream_type == HAD_RUNNING_STREAM) {
+ /* Report UNDERRUN error to above layers */
+ intelhaddata->flag_underrun = 1;
+ stream->period_elapsed(stream->had_substream);
+ }
+
+ return 0;
+}
+
+static int had_process_hot_plug(struct snd_intelhad *intelhaddata)
+{
+ enum intel_had_aud_buf_type buf_id;
+ struct snd_pcm_substream *substream;
+ struct had_stream_data *had_stream;
+ unsigned long flag_irqs;
+
+ pr_debug("Enter:%s\n", __func__);
+
+ substream = intelhaddata->stream_info.had_substream;
+ had_stream = &intelhaddata->stream_data;
+
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ if (intelhaddata->drv_status == HAD_DRV_CONNECTED) {
+ pr_debug("Device already connected\n");
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ return 0;
+ }
+ buf_id = intelhaddata->curr_buf;
+ intelhaddata->buff_done = buf_id;
+ intelhaddata->drv_status = HAD_DRV_CONNECTED;
+ pr_debug("%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_CONNECTED\n",
+ __func__, __LINE__);
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+
+ pr_debug("Processing HOT_PLUG, buf_id = %d\n", buf_id);
+
+ /* Safety check */
+ if (substream) {
+ pr_debug("There should not be active PB from ALSA\n");
+ pr_debug("Signifies, cable is plugged-in even before\n");
+ pr_debug("processing snd_pcm_disconnect\n");
+ /* Set runtime->state to hw_params done */
+ snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
+ }
+
+ had_build_channel_allocation_map(intelhaddata);
+
+ return 0;
+}
+
+static int had_process_hot_unplug(struct snd_intelhad *intelhaddata)
+{
+ enum intel_had_aud_buf_type buf_id;
+ struct had_stream_data *had_stream;
+ unsigned long flag_irqs;
+
+ pr_debug("Enter:%s\n", __func__);
+
+ had_stream = &intelhaddata->stream_data;
+ buf_id = intelhaddata->curr_buf;
+
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+
+ if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
+ pr_debug("Device already disconnected\n");
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ return 0;
+
+ } else {
+ /* Disable Audio */
+ snd_intelhad_enable_audio_int(intelhaddata, false);
+ snd_intelhad_enable_audio(intelhaddata, false);
+ }
+
+ intelhaddata->drv_status = HAD_DRV_DISCONNECTED;
+ pr_debug("%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_DISCONNECTED\n",
+ __func__, __LINE__);
+
+ /* Report to above ALSA layer */
+ if (intelhaddata->stream_info.had_substream != NULL) {
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ pr_debug("%s: unlock -> sending pcm_stop -> lock\n", __func__);
+ snd_pcm_stop(intelhaddata->stream_info.had_substream,
+ SNDRV_PCM_STATE_SETUP);
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ }
+
+ had_stream->stream_type = HAD_INIT;
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ kfree(intelhaddata->chmap->chmap);
+ intelhaddata->chmap->chmap = NULL;
+ intelhaddata->audio_reg_base = NULL;
+ pr_debug("%s: unlocked -> returned\n", __func__);
+
+ return 0;
+}
+
+/* PCM operations structure and the calls back for the same */
+static struct snd_pcm_ops snd_intelhad_playback_ops = {
.open = snd_intelhad_open,
.close = snd_intelhad_close,
.ioctl = snd_pcm_lib_ioctl,
@@ -1472,7 +1829,7 @@ struct snd_pcm_ops snd_intelhad_playback_ops = {
.mmap = snd_intelhad_pcm_mmap,
};
-/**
+/*
* snd_intelhad_pcm_free - to free the memory allocated
*
* @pcm: pointer to pcm instance
@@ -1505,6 +1862,7 @@ static int had_iec958_get(struct snd_kcontrol *kcontrol,
(intelhaddata->aes_bits >> 24) & 0xff;
return 0;
}
+
static int had_iec958_mask_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
@@ -1514,6 +1872,7 @@ static int had_iec958_mask_get(struct snd_kcontrol *kcontrol,
ucontrol->value.iec958.status[3] = 0xff;
return 0;
}
+
static int had_iec958_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
diff --git a/sound/x86/intel_hdmi_audio.h b/sound/x86/intel_hdmi_audio.h
index 6efa846f98c9..d301c3021375 100644
--- a/sound/x86/intel_hdmi_audio.h
+++ b/sound/x86/intel_hdmi_audio.h
@@ -154,35 +154,4 @@ struct snd_intelhad {
struct work_struct hdmi_audio_wq;
};
-int hdmi_lpe_audio_suspend(struct platform_device *pdev, pm_message_t state);
-int hdmi_lpe_audio_resume(struct platform_device *pdev);
-extern struct snd_pcm_ops snd_intelhad_playback_ops;
-
-int had_process_buffer_done(struct snd_intelhad *intelhaddata);
-int had_process_buffer_underrun(struct snd_intelhad *intelhaddata);
-int had_process_hot_plug(struct snd_intelhad *intelhaddata);
-int had_process_hot_unplug(struct snd_intelhad *intelhaddata);
-
-int snd_intelhad_init_audio_ctrl(struct snd_pcm_substream *substream,
- struct snd_intelhad *intelhaddata,
- int flag_silence);
-int snd_intelhad_prog_buffer(struct snd_intelhad *intelhaddata,
- int start, int end);
-int snd_intelhad_invd_buffer(int start, int end);
-int snd_intelhad_read_len(struct snd_intelhad *intelhaddata);
-void had_build_channel_allocation_map(struct snd_intelhad *intelhaddata);
-
-void snd_intelhad_enable_audio_int(struct snd_intelhad *ctx, bool enable);
-void snd_intelhad_enable_audio(struct snd_intelhad *ctx, bool enable);
-void snd_intelhad_handle_underrun(struct snd_intelhad *intelhaddata);
-
-/* Register access functions */
-int had_get_hwstate(struct snd_intelhad *intelhaddata);
-int had_read_register(struct snd_intelhad *intelhaddata,
- u32 reg_addr, u32 *data);
-int had_write_register(struct snd_intelhad *intelhaddata,
- u32 reg_addr, u32 data);
-int had_read_modify(struct snd_intelhad *intelhaddata,
- u32 reg_addr, u32 data, u32 mask);
-
#endif /* _INTEL_HDMI_AUDIO_ */
diff --git a/sound/x86/intel_hdmi_audio_if.c b/sound/x86/intel_hdmi_audio_if.c
deleted file mode 100644
index 327650dd1723..000000000000
--- a/sound/x86/intel_hdmi_audio_if.c
+++ /dev/null
@@ -1,390 +0,0 @@
-/*
- * intel_hdmi_audio_if.c - Intel HDMI audio driver for MID
- *
- * Copyright (C) 2016 Intel Corp
- * Authors: Sailaja Bandarupalli <sailaja.bandarupalli at intel.com>
- * Ramesh Babu K V <ramesh.babu at intel.com>
- * Vaibhav Agarwal <vaibhav.agarwal at intel.com>
- * Jerome Anand <jerome.anand at intel.com>
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- * ALSA driver for Intel MID HDMI audio controller. This file contains
- * interface functions exposed to HDMI Display driver and code to register
- * with ALSA framework..
- */
-
-#define pr_fmt(fmt) "had: " fmt
-
-#include <linux/io.h>
-#include <linux/jiffies.h>
-#include <linux/slab.h>
-#include <sound/pcm.h>
-#include <sound/core.h>
-#include "intel_hdmi_audio.h"
-#include "intel_hdmi_lpe_audio.h"
-
-/*
- * hdmi_lpe_audio_suspend - power management suspend function
- *
- * @pdev: platform device
- *
- * This function is called by client driver to suspend the
- * hdmi audio.
- */
-int hdmi_lpe_audio_suspend(struct platform_device *pdev, pm_message_t state)
-{
- struct had_stream_data *had_stream;
- unsigned long flag_irqs;
- struct snd_pcm_substream *substream;
- struct snd_intelhad *intelhaddata = platform_get_drvdata(pdev);
-
- pr_debug("Enter:%s\n", __func__);
-
- had_stream = &intelhaddata->stream_data;
- substream = intelhaddata->stream_info.had_substream;
-
- if (intelhaddata->dev->power.runtime_status != RPM_SUSPENDED) {
- pr_err("audio stream is active\n");
- return -EAGAIN;
- }
-
-
- spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
- if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- pr_debug("had not connected\n");
- return 0;
- }
-
- if (intelhaddata->drv_status == HAD_DRV_SUSPENDED) {
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- pr_debug("had already suspended\n");
- return 0;
- }
-
- intelhaddata->drv_status = HAD_DRV_SUSPENDED;
- pr_debug("%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_SUSPENDED\n",
- __func__, __LINE__);
-
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- snd_intelhad_enable_audio_int(intelhaddata, false);
- pr_debug("Exit:%s", __func__);
- return 0;
-}
-
-/*
- * hdmi_lpe_audio_resume - power management resume function
- *
- *@pdev: platform device
- *
- * This function is called by client driver to resume the
- * hdmi audio.
- */
-int hdmi_lpe_audio_resume(struct platform_device *pdev)
-{
- struct snd_intelhad *intelhaddata = platform_get_drvdata(pdev);
- unsigned long flag_irqs;
-
- pr_debug("Enter:%s\n", __func__);
-
- spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
- if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- pr_debug("had not connected\n");
- return 0;
- }
-
- if (intelhaddata->drv_status != HAD_DRV_SUSPENDED) {
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- pr_err("had is not in suspended state\n");
- return 0;
- }
-
- if (had_get_hwstate(intelhaddata)) {
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- pr_err("Failed to resume. Device not accessible\n");
- return -ENODEV;
- }
-
- intelhaddata->drv_status = HAD_DRV_CONNECTED;
- pr_debug("%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_DISCONNECTED\n",
- __func__, __LINE__);
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- snd_intelhad_enable_audio_int(intelhaddata, true);
- pr_debug("Exit:%s", __func__);
- return 0;
-}
-
-static inline int had_chk_intrmiss(struct snd_intelhad *intelhaddata,
- enum intel_had_aud_buf_type buf_id)
-{
- int i, intr_count = 0;
- enum intel_had_aud_buf_type buff_done;
- u32 buf_size, buf_addr;
- struct had_stream_data *had_stream;
- unsigned long flag_irqs;
-
- had_stream = &intelhaddata->stream_data;
-
- buff_done = buf_id;
-
- intr_count = snd_intelhad_read_len(intelhaddata);
- if (intr_count > 1) {
- /* In case of active playback */
- pr_err("Driver detected %d missed buffer done interrupt(s)!!!!\n",
- (intr_count - 1));
- if (intr_count > 3)
- return intr_count;
-
- buf_id += (intr_count - 1);
- /* Reprogram registers*/
- for (i = buff_done; i < buf_id; i++) {
- int j = i % 4;
-
- buf_size = intelhaddata->buf_info[j].buf_size;
- buf_addr = intelhaddata->buf_info[j].buf_addr;
- had_write_register(intelhaddata,
- AUD_BUF_A_LENGTH +
- (j * HAD_REG_WIDTH), buf_size);
- had_write_register(intelhaddata,
- AUD_BUF_A_ADDR+(j * HAD_REG_WIDTH),
- (buf_addr | BIT(0) | BIT(1)));
- }
- buf_id = buf_id % 4;
- spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
- intelhaddata->buff_done = buf_id;
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- }
-
- return intr_count;
-}
-
-int had_process_buffer_done(struct snd_intelhad *intelhaddata)
-{
- u32 len = 1;
- enum intel_had_aud_buf_type buf_id;
- enum intel_had_aud_buf_type buff_done;
- struct pcm_stream_info *stream;
- u32 buf_size;
- struct had_stream_data *had_stream;
- int intr_count;
- enum had_status_stream stream_type;
- unsigned long flag_irqs;
-
- had_stream = &intelhaddata->stream_data;
- stream = &intelhaddata->stream_info;
- intr_count = 1;
-
- spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
- if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- pr_err("%s:Device already disconnected\n", __func__);
- return 0;
- }
- buf_id = intelhaddata->curr_buf;
- intelhaddata->buff_done = buf_id;
- buff_done = intelhaddata->buff_done;
- buf_size = intelhaddata->buf_info[buf_id].buf_size;
- stream_type = had_stream->stream_type;
-
- pr_debug("Enter:%s buf_id=%d\n", __func__, buf_id);
-
- /* Every debug statement has an implication
- * of ~5msec. Thus, avoid having >3 debug statements
- * for each buffer_done handling.
- */
-
- /* Check for any intr_miss in case of active playback */
- if (had_stream->stream_type == HAD_RUNNING_STREAM) {
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- intr_count = had_chk_intrmiss(intelhaddata, buf_id);
- if (!intr_count || (intr_count > 3)) {
- pr_err("HAD SW state in non-recoverable!!! mode\n");
- pr_err("Already played stale data\n");
- return 0;
- }
- buf_id += (intr_count - 1);
- buf_id = buf_id % 4;
- spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
- }
-
- intelhaddata->buf_info[buf_id].is_valid = true;
- if (intelhaddata->valid_buf_cnt-1 == buf_id) {
- if (had_stream->stream_type >= HAD_RUNNING_STREAM)
- intelhaddata->curr_buf = HAD_BUF_TYPE_A;
- } else
- intelhaddata->curr_buf = buf_id + 1;
-
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
-
- if (had_get_hwstate(intelhaddata)) {
- pr_err("HDMI cable plugged-out\n");
- return 0;
- }
-
- /*Reprogram the registers with addr and length*/
- had_write_register(intelhaddata,
- AUD_BUF_A_LENGTH + (buf_id * HAD_REG_WIDTH),
- buf_size);
- had_write_register(intelhaddata,
- AUD_BUF_A_ADDR + (buf_id * HAD_REG_WIDTH),
- intelhaddata->buf_info[buf_id].buf_addr |
- BIT(0) | BIT(1));
-
- had_read_register(intelhaddata,
- AUD_BUF_A_LENGTH + (buf_id * HAD_REG_WIDTH),
- &len);
- pr_debug("%s:Enabled buf[%d]\n", __func__, buf_id);
-
- /* In case of actual data,
- * report buffer_done to above ALSA layer
- */
- buf_size = intelhaddata->buf_info[buf_id].buf_size;
- if (stream_type >= HAD_RUNNING_STREAM) {
- intelhaddata->stream_info.buffer_rendered +=
- (intr_count * buf_size);
- stream->period_elapsed(stream->had_substream);
- }
-
- return 0;
-}
-
-int had_process_buffer_underrun(struct snd_intelhad *intelhaddata)
-{
- enum intel_had_aud_buf_type buf_id;
- struct pcm_stream_info *stream;
- struct had_stream_data *had_stream;
- enum had_status_stream stream_type;
- unsigned long flag_irqs;
- int drv_status;
-
- had_stream = &intelhaddata->stream_data;
- stream = &intelhaddata->stream_info;
-
- spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
- buf_id = intelhaddata->curr_buf;
- stream_type = had_stream->stream_type;
- intelhaddata->buff_done = buf_id;
- drv_status = intelhaddata->drv_status;
- if (stream_type == HAD_RUNNING_STREAM)
- intelhaddata->curr_buf = HAD_BUF_TYPE_A;
-
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
-
- pr_debug("Enter:%s buf_id=%d, stream_type=%d\n",
- __func__, buf_id, stream_type);
-
- snd_intelhad_handle_underrun(intelhaddata);
-
- if (drv_status == HAD_DRV_DISCONNECTED) {
- pr_err("%s:Device already disconnected\n", __func__);
- return 0;
- }
-
- if (stream_type == HAD_RUNNING_STREAM) {
- /* Report UNDERRUN error to above layers */
- intelhaddata->flag_underrun = 1;
- stream->period_elapsed(stream->had_substream);
- }
-
- return 0;
-}
-
-int had_process_hot_plug(struct snd_intelhad *intelhaddata)
-{
- enum intel_had_aud_buf_type buf_id;
- struct snd_pcm_substream *substream;
- struct had_stream_data *had_stream;
- unsigned long flag_irqs;
-
- pr_debug("Enter:%s\n", __func__);
-
- substream = intelhaddata->stream_info.had_substream;
- had_stream = &intelhaddata->stream_data;
-
- spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
- if (intelhaddata->drv_status == HAD_DRV_CONNECTED) {
- pr_debug("Device already connected\n");
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- return 0;
- }
- buf_id = intelhaddata->curr_buf;
- intelhaddata->buff_done = buf_id;
- intelhaddata->drv_status = HAD_DRV_CONNECTED;
- pr_debug("%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_CONNECTED\n",
- __func__, __LINE__);
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
-
- pr_debug("Processing HOT_PLUG, buf_id = %d\n", buf_id);
-
- /* Safety check */
- if (substream) {
- pr_debug("There should not be active PB from ALSA\n");
- pr_debug("Signifies, cable is plugged-in even before\n");
- pr_debug("processing snd_pcm_disconnect\n");
- /* Set runtime->state to hw_params done */
- snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
- }
-
- had_build_channel_allocation_map(intelhaddata);
-
- return 0;
-}
-
-int had_process_hot_unplug(struct snd_intelhad *intelhaddata)
-{
- enum intel_had_aud_buf_type buf_id;
- struct had_stream_data *had_stream;
- unsigned long flag_irqs;
-
- pr_debug("Enter:%s\n", __func__);
-
- had_stream = &intelhaddata->stream_data;
- buf_id = intelhaddata->curr_buf;
-
- spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
-
- if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
- pr_debug("Device already disconnected\n");
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- return 0;
-
- } else {
- /* Disable Audio */
- snd_intelhad_enable_audio_int(intelhaddata, false);
- snd_intelhad_enable_audio(intelhaddata, false);
- }
-
- intelhaddata->drv_status = HAD_DRV_DISCONNECTED;
- pr_debug("%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_DISCONNECTED\n",
- __func__, __LINE__);
-
- /* Report to above ALSA layer */
- if (intelhaddata->stream_info.had_substream != NULL) {
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- pr_debug("%s: unlock -> sending pcm_stop -> lock\n", __func__);
- snd_pcm_stop(intelhaddata->stream_info.had_substream,
- SNDRV_PCM_STATE_SETUP);
- spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
- }
-
- had_stream->stream_type = HAD_INIT;
- spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
- kfree(intelhaddata->chmap->chmap);
- intelhaddata->chmap->chmap = NULL;
- intelhaddata->audio_reg_base = NULL;
- pr_debug("%s: unlocked -> returned\n", __func__);
-
- return 0;
-}
-
--
2.11.0
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