Audio : add hdmi_i2s_audio_disable to disable hdmi-audio function

Change-Id: I75aa03b139fbdc77fc553c15d566671608f98ecf

Author: yupei_lin

drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h

@@ -3,6 +3,7 @@
 #define DW_HDMI_AUDIO_H
 
 struct dw_hdmi;
+extern bool hdmi_i2s_audio_disable;
 
 struct dw_hdmi_audio_data {
 	phys_addr_t phys;

drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c

@@ -223,6 +223,7 @@ static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
 static int snd_dw_hdmi_probe(struct platform_device *pdev)
 {
 	struct dw_hdmi_i2s_audio_data *audio = pdev->dev.platform_data;
+	struct dw_hdmi *hdmi = audio->hdmi;
 	struct platform_device_info pdevinfo;
 	struct hdmi_codec_pdata pdata;
 
@@ -240,6 +241,13 @@ static int snd_dw_hdmi_probe(struct platform_device *pdev)
 	pdevinfo.dma_mask	= DMA_BIT_MASK(32);
 
 	audio->pdev = platform_device_register_full(&pdevinfo);
+
+	if (hdmi_i2s_audio_disable) {
+		dw_hdmi_audio_disable(hdmi);
+		hdmi_write(audio, HDMI_AUD_CONF0_SW_RESET, HDMI_AUD_CONF0);
+		dev_info(&pdev->dev, "disable hdmi i2s audio\n");
+	}
+
 	return IS_ERR_OR_NULL(audio->pdev);
 }
 

drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c

@@ -58,6 +58,9 @@
 #define RK_HDMI_COLORIMETRY_BT2020	(HDMI_COLORIMETRY_EXTENDED + \
 					 HDMI_EXTENDED_COLORIMETRY_BT2020)
 
+bool hdmi_i2s_audio_disable = false;
+EXPORT_SYMBOL(hdmi_i2s_audio_disable);
+
 /* HDMI output pixel format */
 enum drm_hdmi_output_type {
 	DRM_HDMI_OUTPUT_DEFAULT_RGB, /* default RGB */
@@ -386,6 +389,9 @@ static int rockchip_hdmi_parse_dt(struct rockchip_hdmi *hdmi)
 	int ret, val, phy_table_size;
 	u32 *phy_config;
 
+	hdmi_i2s_audio_disable = of_property_read_bool(np, "hdmi-i2s-audio-disable");
+	dev_info(hdmi->dev, "hdmi_i2s_audio_disable=%s\n", (hdmi_i2s_audio_disable ? "true" : "false"));
+
 	hdmi->regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
 	if (IS_ERR(hdmi->regmap)) {
 		dev_err(hdmi->dev, "Unable to get rockchip,grf\n");