drm/i915: add a "force-dvi" HDMI audio mode
When HDMI-DVI converter is used, it's not only necessary to turn off
audio, but also to disable HDMI_MODE_SELECT and video infoframe. Since
the DVI mode is mainly tied to audio functionality from end user POV,
add a new "force-dvi" audio mode:
xrandr --output HDMI1 --set audio force-dvi
Note that most users won't need to set this and happily rely on the EDID
based DVI auto detection.
Reported-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 563d24e..caec1fd 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -762,6 +762,13 @@
struct drm_property *force_audio_property;
} drm_i915_private_t;
+enum hdmi_force_audio {
+ HDMI_AUDIO_OFF_DVI = -2, /* no aux data for HDMI-DVI converter */
+ HDMI_AUDIO_OFF, /* force turn off HDMI audio */
+ HDMI_AUDIO_AUTO, /* trust EDID */
+ HDMI_AUDIO_ON, /* force turn on HDMI audio */
+};
+
enum i915_cache_level {
I915_CACHE_NONE,
I915_CACHE_LLC,
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 086288e..cae3e5f 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -44,7 +44,7 @@
uint32_t color_range;
bool has_hdmi_sink;
bool has_audio;
- int force_audio;
+ enum hdmi_force_audio force_audio;
void (*write_infoframe)(struct drm_encoder *encoder,
struct dip_infoframe *frame);
};
@@ -339,7 +339,9 @@
if (edid) {
if (edid->input & DRM_EDID_INPUT_DIGITAL) {
status = connector_status_connected;
- intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
+ if (intel_hdmi->force_audio != HDMI_AUDIO_OFF_DVI)
+ intel_hdmi->has_hdmi_sink =
+ drm_detect_hdmi_monitor(edid);
intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
}
connector->display_info.raw_edid = NULL;
@@ -347,8 +349,9 @@
}
if (status == connector_status_connected) {
- if (intel_hdmi->force_audio)
- intel_hdmi->has_audio = intel_hdmi->force_audio > 0;
+ if (intel_hdmi->force_audio != HDMI_AUDIO_AUTO)
+ intel_hdmi->has_audio =
+ (intel_hdmi->force_audio == HDMI_AUDIO_ON);
}
return status;
@@ -402,7 +405,7 @@
return ret;
if (property == dev_priv->force_audio_property) {
- int i = val;
+ enum hdmi_force_audio i = val;
bool has_audio;
if (i == intel_hdmi->force_audio)
@@ -410,13 +413,13 @@
intel_hdmi->force_audio = i;
- if (i == 0)
+ if (i == HDMI_AUDIO_AUTO)
has_audio = intel_hdmi_detect_audio(connector);
else
- has_audio = i > 0;
+ has_audio = (i == HDMI_AUDIO_ON);
- if (has_audio == intel_hdmi->has_audio)
- return 0;
+ if (i == HDMI_AUDIO_OFF_DVI)
+ intel_hdmi->has_hdmi_sink = 0;
intel_hdmi->has_audio = has_audio;
goto done;
diff --git a/drivers/gpu/drm/i915/intel_modes.c b/drivers/gpu/drm/i915/intel_modes.c
index be2c6fe..7be4616 100644
--- a/drivers/gpu/drm/i915/intel_modes.c
+++ b/drivers/gpu/drm/i915/intel_modes.c
@@ -84,6 +84,7 @@
}
static const char *force_audio_names[] = {
+ "force-dvi",
"off",
"auto",
"on",
@@ -106,7 +107,8 @@
return;
for (i = 0; i < ARRAY_SIZE(force_audio_names); i++)
- drm_property_add_enum(prop, i, i-1, force_audio_names[i]);
+ drm_property_add_enum(prop, i, i-2,
+ force_audio_names[i]);
dev_priv->force_audio_property = prop;
}