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: Yakir Yang <ykk@rock-chips.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -365,6 +365,16 @@ static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi)
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mutex_unlock(&hdmi->audio_mutex);
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}
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void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate)
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{
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mutex_lock(&hdmi->audio_mutex);
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hdmi->sample_rate = rate;
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hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock,
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hdmi->sample_rate, hdmi->ratio);
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mutex_unlock(&hdmi->audio_mutex);
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}
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EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_rate);
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/*
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* this submodule is responsible for the video data synchronization.
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* for example, for RGB 4:4:4 input, the data map is defined as
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@ -12,6 +12,8 @@
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#include <drm/drmP.h>
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struct dw_hdmi;
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enum {
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DW_HDMI_RES_8,
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DW_HDMI_RES_10,
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@ -59,4 +61,7 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
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void *data, struct drm_encoder *encoder,
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struct resource *iores, int irq,
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const struct dw_hdmi_plat_data *plat_data);
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void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate);
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#endif /* __IMX_HDMI_H__ */
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