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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>
This commit is contained in:
Russell King 2015-03-27 12:50:58 +00:00
parent b91eee8cd8
commit b5814fff27
2 changed files with 15 additions and 0 deletions
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10
drivers/gpu/drm/bridge/dw_hdmi.c
View File

@ -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

5
include/drm/bridge/dw_hdmi.h
View File

@ -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__ */