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 <rmk+kernel@xxxxxxxxxxxxxxxx>
---
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 7f764716f3c4..578d7362cd65 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;
@@ -1271,13 +1272,17 @@ 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);
@@ -1442,6 +1447,7 @@ 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);
--
2.1.0
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