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path: root/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c
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Diffstat (limited to 'drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c')
-rw-r--r--drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c84
1 files changed, 46 insertions, 38 deletions
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c
index 8f2d1379c880..cf1f66b7b192 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c
@@ -1,16 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* DesignWare HDMI audio driver
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
* Written and tested against the Designware HDMI Tx found in iMX6.
*/
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/vmalloc.h>
#include <drm/bridge/dw_hdmi.h>
#include <drm/drm_edid.h>
@@ -66,10 +64,6 @@ enum {
HDMI_REVISION_ID = 0x0001,
HDMI_IH_AHBDMAAUD_STAT0 = 0x0109,
HDMI_IH_MUTE_AHBDMAAUD_STAT0 = 0x0189,
- HDMI_FC_AUDICONF2 = 0x1027,
- HDMI_FC_AUDSCONF = 0x1063,
- HDMI_FC_AUDSCONF_LAYOUT1 = 1 << 0,
- HDMI_FC_AUDSCONF_LAYOUT0 = 0 << 0,
HDMI_AHB_DMA_CONF0 = 0x3600,
HDMI_AHB_DMA_START = 0x3601,
HDMI_AHB_DMA_STOP = 0x3602,
@@ -298,7 +292,7 @@ static irqreturn_t snd_dw_hdmi_irq(int irq, void *data)
return IRQ_HANDLED;
}
-static struct snd_pcm_hardware dw_hdmi_hw = {
+static const struct snd_pcm_hardware dw_hdmi_hw = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP |
@@ -327,13 +321,17 @@ static int dw_hdmi_open(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_dw_hdmi *dw = substream->private_data;
void __iomem *base = dw->data.base;
+ u8 *eld;
int ret;
runtime->hw = dw_hdmi_hw;
- ret = snd_pcm_hw_constraint_eld(runtime, dw->data.eld);
- if (ret < 0)
- return ret;
+ eld = dw->data.get_eld(dw->data.hdmi);
+ if (eld) {
+ ret = snd_pcm_hw_constraint_eld(runtime, eld);
+ if (ret < 0)
+ return ret;
+ }
ret = snd_pcm_limit_hw_rates(runtime);
if (ret < 0)
@@ -391,22 +389,43 @@ static int dw_hdmi_close(struct snd_pcm_substream *substream)
static int dw_hdmi_hw_free(struct snd_pcm_substream *substream)
{
- return snd_pcm_lib_free_vmalloc_buffer(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ vfree(runtime->dma_area);
+ runtime->dma_area = NULL;
+ return 0;
}
static int dw_hdmi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ size_t size = params_buffer_bytes(params);
+
/* Allocate the PCM runtime buffer, which is exposed to userspace. */
- return snd_pcm_lib_alloc_vmalloc_buffer(substream,
- params_buffer_bytes(params));
+ if (runtime->dma_area) {
+ if (runtime->dma_bytes >= size)
+ return 0; /* already large enough */
+ vfree(runtime->dma_area);
+ }
+ runtime->dma_area = vzalloc(size);
+ if (!runtime->dma_area)
+ return -ENOMEM;
+ runtime->dma_bytes = size;
+ return 1;
+}
+
+static struct page *dw_hdmi_get_page(struct snd_pcm_substream *substream,
+ unsigned long offset)
+{
+ return vmalloc_to_page(substream->runtime->dma_area + offset);
}
static int dw_hdmi_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_dw_hdmi *dw = substream->private_data;
- u8 threshold, conf0, conf1, layout, ca;
+ u8 threshold, conf0, conf1, ca;
/* Setup as per 3.0.5 FSL 4.1.0 BSP */
switch (dw->revision) {
@@ -437,20 +456,12 @@ static int dw_hdmi_prepare(struct snd_pcm_substream *substream)
conf1 = default_hdmi_channel_config[runtime->channels - 2].conf1;
ca = default_hdmi_channel_config[runtime->channels - 2].ca;
- /*
- * For >2 channel PCM audio, we need to select layout 1
- * and set an appropriate channel map.
- */
- if (runtime->channels > 2)
- layout = HDMI_FC_AUDSCONF_LAYOUT1;
- else
- layout = HDMI_FC_AUDSCONF_LAYOUT0;
-
writeb_relaxed(threshold, dw->data.base + HDMI_AHB_DMA_THRSLD);
writeb_relaxed(conf0, dw->data.base + HDMI_AHB_DMA_CONF0);
writeb_relaxed(conf1, dw->data.base + HDMI_AHB_DMA_CONF1);
- writeb_relaxed(layout, dw->data.base + HDMI_FC_AUDSCONF);
- writeb_relaxed(ca, dw->data.base + HDMI_FC_AUDICONF2);
+
+ dw_hdmi_set_channel_count(dw->data.hdmi, runtime->channels);
+ dw_hdmi_set_channel_allocation(dw->data.hdmi, ca);
switch (runtime->format) {
case SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE:
@@ -517,7 +528,7 @@ static snd_pcm_uframes_t dw_hdmi_pointer(struct snd_pcm_substream *substream)
return bytes_to_frames(runtime, dw->buf_offset);
}
-static struct snd_pcm_ops snd_dw_hdmi_ops = {
+static const struct snd_pcm_ops snd_dw_hdmi_ops = {
.open = dw_hdmi_open,
.close = dw_hdmi_close,
.ioctl = snd_pcm_lib_ioctl,
@@ -526,7 +537,7 @@ static struct snd_pcm_ops snd_dw_hdmi_ops = {
.prepare = dw_hdmi_prepare,
.trigger = dw_hdmi_trigger,
.pointer = dw_hdmi_pointer,
- .page = snd_pcm_lib_get_vmalloc_page,
+ .page = dw_hdmi_get_page,
};
static int snd_dw_hdmi_probe(struct platform_device *pdev)
@@ -553,8 +564,8 @@ static int snd_dw_hdmi_probe(struct platform_device *pdev)
if (ret < 0)
return ret;
- strlcpy(card->driver, DRIVER_NAME, sizeof(card->driver));
- strlcpy(card->shortname, "DW-HDMI", sizeof(card->shortname));
+ strscpy(card->driver, DRIVER_NAME, sizeof(card->driver));
+ strscpy(card->shortname, "DW-HDMI", sizeof(card->shortname));
snprintf(card->longname, sizeof(card->longname),
"%s rev 0x%02x, irq %d", card->shortname, revision,
data->irq);
@@ -572,7 +583,7 @@ static int snd_dw_hdmi_probe(struct platform_device *pdev)
dw->pcm = pcm;
pcm->private_data = dw;
- strlcpy(pcm->name, DRIVER_NAME, sizeof(pcm->name));
+ strscpy(pcm->name, DRIVER_NAME, sizeof(pcm->name));
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_dw_hdmi_ops);
/*
@@ -595,13 +606,11 @@ err:
return ret;
}
-static int snd_dw_hdmi_remove(struct platform_device *pdev)
+static void snd_dw_hdmi_remove(struct platform_device *pdev)
{
struct snd_dw_hdmi *dw = platform_get_drvdata(pdev);
snd_card_free(dw->card);
-
- return 0;
}
#if defined(CONFIG_PM_SLEEP) && defined(IS_NOT_BROKEN)
@@ -614,7 +623,6 @@ static int snd_dw_hdmi_suspend(struct device *dev)
struct snd_dw_hdmi *dw = dev_get_drvdata(dev);
snd_power_change_state(dw->card, SNDRV_CTL_POWER_D3cold);
- snd_pcm_suspend_all(dw->pcm);
return 0;
}
@@ -637,7 +645,7 @@ static SIMPLE_DEV_PM_OPS(snd_dw_hdmi_pm, snd_dw_hdmi_suspend,
static struct platform_driver snd_dw_hdmi_driver = {
.probe = snd_dw_hdmi_probe,
- .remove = snd_dw_hdmi_remove,
+ .remove = snd_dw_hdmi_remove,
.driver = {
.name = DRIVER_NAME,
.pm = PM_OPS,
@@ -646,7 +654,7 @@ static struct platform_driver snd_dw_hdmi_driver = {
module_platform_driver(snd_dw_hdmi_driver);
-MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
+MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
MODULE_DESCRIPTION("Synopsis Designware HDMI AHB ALSA interface");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRIVER_NAME);
generated by cgit (git 2.34.1) at 2025-12-29 07:20:26 +0000