kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
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@@ -132,6 +132,23 @@
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 	return 0;
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 }
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+static int dw_hdmi_i2s_prepare(struct device *dev, void *data,
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+			       struct hdmi_codec_daifmt *fmt,
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+			       struct hdmi_codec_params *hparms)
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+{
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+	struct dw_hdmi_i2s_audio_data *audio = data;
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+	struct dw_hdmi *hdmi = audio->hdmi;
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+
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+	dw_hdmi_audio_disable(hdmi);
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+
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+	hdmi_write(audio, HDMI_AUD_CONF0_SW_RESET, HDMI_AUD_CONF0);
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+	hdmi_write(audio, (u8)~HDMI_MC_SWRSTZ_I2SSWRST_REQ, HDMI_MC_SWRSTZ);
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+
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+	dw_hdmi_audio_enable(hdmi);
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+
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+	return 0;
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+}
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+
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 static int dw_hdmi_i2s_audio_startup(struct device *dev, void *data)
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 {
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 	struct dw_hdmi_i2s_audio_data *audio = data;
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@@ -198,6 +215,7 @@
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 static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
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 	.hw_params	= dw_hdmi_i2s_hw_params,
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+	.prepare	= dw_hdmi_i2s_prepare,
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 	.audio_startup  = dw_hdmi_i2s_audio_startup,
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 	.audio_shutdown	= dw_hdmi_i2s_audio_shutdown,
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 	.get_eld	= dw_hdmi_i2s_get_eld,