ASoC: hdmi-codec: callback function will be called with private data

Current hdmi-codec driver is assuming that it will be registered
from HDMI driver. Because of this assumption, each callback function
has struct device pointer which is parent device (= HDMI).
Then, it can use dev_get_drvdata() to get private data.

OTOH, on some SoC/HDMI case, SoC has VIDEO/SOUND and HDMI IPs.
This case, it needs SoC VIDEO, SoC SOUND and HDMI video, HDMI codec
driver. In DesignWare HDMI IP case, SoC VIDEO (= DRM/KMS) driver tries
to bind DesignWare HDMI video driver, and HDMI codec driver
(= hdmi-codec). This case, above "parent device" of HDMI codec driver
is DRM/KMS driver and its "device" already has private data.

And, from DT and ASoC CPU/Codec/Card binding point of view, HDMI codec
(= hdmi-codec) needs to have "parent device" (= DRM/KMS), otherwise,
it never detect sound card.

Because of these reasons, some driver can't use dev_get_drvdata() to
get private data on hdmi-codec driver. This patch add new void pointer
on hdmi_codec_pdata for private data, and callback function will be
called with it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 16 insertions, 12 deletions

diff --git a/include/sound/hdmi-codec.h b/include/sound/hdmi-codec.h
index fc3a481ad91e..530c57bdefa0 100644
--- a/include/sound/hdmi-codec.h
+++ b/include/sound/hdmi-codec.h
@@ -53,18 +53,19 @@ struct hdmi_codec_params {
         int channels;
 };
 
+struct hdmi_codec_pdata;
 struct hdmi_codec_ops {
         /*
          * Called when ASoC starts an audio stream setup.
          * Optional
          */
-        int (*audio_startup)(struct device *dev);
+        int (*audio_startup)(struct device *dev, void *data);
 
         /*
          * Configures HDMI-encoder for audio stream.
          * Mandatory
          */
-        int (*hw_params)(struct device *dev,
+        int (*hw_params)(struct device *dev, void *data,
                          struct hdmi_codec_daifmt *fmt,
                          struct hdmi_codec_params *hparms);
 
@@ -72,19 +73,20 @@ struct hdmi_codec_ops {
          * Shuts down the audio stream.
          * Mandatory
          */
-        void (*audio_shutdown)(struct device *dev);
+        void (*audio_shutdown)(struct device *dev, void *data);
 
         /*
          * Mute/unmute HDMI audio stream.
          * Optional
          */
-        int (*digital_mute)(struct device *dev, bool enable);
+        int (*digital_mute)(struct device *dev, void *data, bool enable);
 
         /*
          * Provides EDID-Like-Data from connected HDMI device.
          * Optional
          */
-        int (*get_eld)(struct device *dev, uint8_t *buf, size_t len);
+        int (*get_eld)(struct device *dev, void *data,
+                       uint8_t *buf, size_t len);
 };
 
 /* HDMI codec initalization data */
@@ -93,6 +95,7 @@ struct hdmi_codec_pdata {
         uint i2s:1;
         uint spdif:1;
         int max_i2s_channels;
+        void *data;
 };
 
 #define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index 8e36e883e453..f27d115626db 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -112,7 +112,7 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
                 return ret;
 
         if (hcp->hcd.ops->audio_startup) {
-                ret = hcp->hcd.ops->audio_startup(dai->dev->parent);
+                ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
                 if (ret) {
                         mutex_lock(&hcp->current_stream_lock);
                         hcp->current_stream = NULL;
@@ -122,8 +122,8 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
         }
 
         if (hcp->hcd.ops->get_eld) {
-                ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->eld,
-                                            sizeof(hcp->eld));
+                ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
+                                            hcp->eld, sizeof(hcp->eld));
 
                 if (!ret) {
                         ret = snd_pcm_hw_constraint_eld(substream->runtime,
@@ -144,7 +144,7 @@ static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
 
         WARN_ON(hcp->current_stream != substream);
 
-        hcp->hcd.ops->audio_shutdown(dai->dev->parent);
+        hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);
 
         mutex_lock(&hcp->current_stream_lock);
         hcp->current_stream = NULL;
@@ -195,8 +195,8 @@ static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
         hp.sample_rate = params_rate(params);
         hp.channels = params_channels(params);
 
-        return hcp->hcd.ops->hw_params(dai->dev->parent, &hcp->daifmt[dai->id],
-                                       &hp);
+        return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
+                                       &hcp->daifmt[dai->id], &hp);
 }
 
 static int hdmi_codec_set_fmt(struct snd_soc_dai *dai,
@@ -280,7 +280,8 @@ static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
         dev_dbg(dai->dev, "%s()\n", __func__);
 
         if (hcp->hcd.ops->digital_mute)
-                return hcp->hcd.ops->digital_mute(dai->dev->parent, mute);
+                return hcp->hcd.ops->digital_mute(dai->dev->parent,
+                                                  hcp->hcd.data, mute);
 
         return 0;
 }