From f709ec07e38a714f8a959f28b3e0388cfb1b2540 Mon Sep 17 00:00:00 2001 From: Russell King Date: Tue, 21 Jul 2015 16:09:39 +0100 Subject: [PATCH] drm: bridge/dw_hdmi: enable audio only if sink supports audio Only enable audio support if the sink supports audio in some form, as defined via its EDID. We discover this capability using the generic drm_detect_monitor_audio() function. Signed-off-by: Russell King --- drivers/gpu/drm/bridge/dw_hdmi.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c index fc9536b2c407..cec5162e8e69 100644 --- a/drivers/gpu/drm/bridge/dw_hdmi.c +++ b/drivers/gpu/drm/bridge/dw_hdmi.c @@ -123,6 +123,7 @@ struct dw_hdmi { struct i2c_adapter *ddc; void __iomem *regs; bool sink_is_hdmi; + bool sink_has_audio; spinlock_t audio_lock; struct mutex audio_mutex; @@ -1257,13 +1258,17 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode) /* HDMI Initialization Step B.3 */ dw_hdmi_enable_video_path(hdmi); - /* not for DVI mode */ - if (hdmi->sink_is_hdmi) { - dev_dbg(hdmi->dev, "%s HDMI mode\n", __func__); + if (hdmi->sink_has_audio) { + dev_dbg(hdmi->dev, "sink has audio support\n"); /* HDMI Initialization Step E - Configure audio */ hdmi_clk_regenerator_update_pixel_clock(hdmi); hdmi_enable_audio_clk(hdmi); + } + + /* not for DVI mode */ + if (hdmi->sink_is_hdmi) { + dev_dbg(hdmi->dev, "%s HDMI mode\n", __func__); /* HDMI Initialization Step F - Configure AVI InfoFrame */ hdmi_config_AVI(hdmi, mode); @@ -1428,6 +1433,7 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector) edid->width_cm, edid->height_cm); hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid); + hdmi->sink_has_audio = drm_detect_monitor_audio(edid); drm_mode_connector_update_edid_property(connector, edid); ret = drm_add_edid_modes(connector, edid); kfree(edid); -- 2.39.2