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Commit b5814fff authored by Russell King's avatar Russell King
Browse files

drm: bridge/dw_hdmi: introduce interface to setting sample rate 



Introduce dw_hdmi_set_sample_rate(), which allows us to configure the
audio sample rate, setting the CTS/N values appropriately.

Tested-by: default avatarYakir Yang <ykk@rock-chips.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent b91eee8c

drivers/gpu/drm/bridge/dw_hdmi.c

+10 −0
Original line number Diff line number Diff line
@@ -365,6 +365,16 @@ static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi) 
	mutex_unlock(&hdmi->audio_mutex);

}



void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate)

{

	mutex_lock(&hdmi->audio_mutex);

	hdmi->sample_rate = rate;

	hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock,

				 hdmi->sample_rate, hdmi->ratio);

	mutex_unlock(&hdmi->audio_mutex);

}

EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_rate);



/*

 * this submodule is responsible for the video data synchronization.

 * for example, for RGB 4:4:4 input, the data map is defined as

include/drm/bridge/dw_hdmi.h

+5 −0
Original line number Diff line number Diff line
@@ -12,6 +12,8 @@ 


#include <drm/drmP.h>



struct dw_hdmi;



enum {

	DW_HDMI_RES_8,

	DW_HDMI_RES_10,
@@ -59,4 +61,7 @@ int dw_hdmi_bind(struct device *dev, struct device *master, 
		 void *data, struct drm_encoder *encoder,

		 struct resource *iores, int irq,

		 const struct dw_hdmi_plat_data *plat_data);



void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate);



#endif /* __IMX_HDMI_H__ */