From b5814fff27c6d0212b86306bdd01fe3aea99cabb Mon Sep 17 00:00:00 2001 From: Russell King Date: Fri, 27 Mar 2015 12:50:58 +0000 Subject: [PATCH] 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 Signed-off-by: Russell King --- drivers/gpu/drm/bridge/dw_hdmi.c | 10 ++++++++++ include/drm/bridge/dw_hdmi.h | 5 +++++ 2 files changed, 15 insertions(+) diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c index eeb01693812a..0ed8c49f1c6e 100644 --- a/drivers/gpu/drm/bridge/dw_hdmi.c +++ b/drivers/gpu/drm/bridge/dw_hdmi.c @@ -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 diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h index de13bfc35634..763af51e1d60 100644 --- a/include/drm/bridge/dw_hdmi.h +++ b/include/drm/bridge/dw_hdmi.h @@ -12,6 +12,8 @@ #include +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__ */