HDMI: add a helper function for config hdmi audio.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>

diff --git a/drivers/video/rockchip/hdmi/rockchip-hdmi-core.c b/drivers/video/rockchip/hdmi/rockchip-hdmi-core.c
index 1844372c25145872336d38af170058e11965846d..b2400175cf02b56ec7ae7d8a1c5b95448a945c4f 100644 (file)
--- a/drivers/video/rockchip/hdmi/rockchip-hdmi-core.c
+++ b/drivers/video/rockchip/hdmi/rockchip-hdmi-core.c
@@ -1,4 +1,5 @@
 #include <linux/delay.h>
+#include <sound/pcm_params.h>
 #include "rockchip-hdmi.h"
 #include "rockchip-hdmi-cec.h"
 
@@ -598,6 +599,54 @@ int hdmi_config_audio(struct hdmi_audio    *audio)
        return 0;
 }
 
+#ifdef CONFIG_RK_HDMI
+int snd_config_hdmi_audio(struct snd_pcm_hw_params *params)
+{
+       struct hdmi_audio audio_cfg;
+       u32     rate;
+
+       switch (params_rate(params)) {
+       case 32000:
+               rate = HDMI_AUDIO_FS_32000;
+               break;
+       case 44100:
+               rate = HDMI_AUDIO_FS_44100;
+               break;
+       case 48000:
+               rate = HDMI_AUDIO_FS_48000;
+               break;
+       case 88200:
+               rate = HDMI_AUDIO_FS_88200;
+               break;
+       case 96000:
+               rate = HDMI_AUDIO_FS_96000;
+               break;
+       case 176400:
+               rate = HDMI_AUDIO_FS_176400;
+               break;
+       case 192000:
+               rate = HDMI_AUDIO_FS_192000;
+               break;
+       default:
+               pr_err("rate %d unsupport.", params_rate(params));
+               rate = HDMI_AUDIO_FS_44100;
+       }
+
+       audio_cfg.rate = rate;
+
+       if (HW_PARAMS_FLAG_NLPCM == params->flags)
+               audio_cfg.type = HDMI_AUDIO_NLPCM;
+       else
+               audio_cfg.type = HDMI_AUDIO_LPCM;
+
+       audio_cfg.channel = params_channels(params);
+       audio_cfg.word_length = HDMI_AUDIO_WORD_LENGTH_16bit;
+
+       return hdmi_config_audio(&audio_cfg);
+}
+EXPORT_SYMBOL(snd_config_hdmi_audio);
+#endif
+
 void hdmi_audio_mute(int mute)
 {
        int i;