drm/radeon: add a connector property for audio

This provides a connector property to enable/disable hdmi
audio on the fly.  The default is disabled, but you can select
auto (let the driver detect an audio capable monitor and enable it)
or enabled (force audio enabled).  This also enables audio by
default so you no longer need a module parameter to enable audio.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

5 files changed, 64 insertions, 7 deletions

diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c
index dfac7965ea28..9166e0b95a0a 100644
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -707,8 +707,9 @@ atombios_get_encoder_mode(struct drm_encoder *encoder)
         switch (connector->connector_type) {
         case DRM_MODE_CONNECTOR_DVII:
         case DRM_MODE_CONNECTOR_HDMIB: /* HDMI-B is basically DL-DVI; analog works fine */
-                if (drm_detect_hdmi_monitor(radeon_connector->edid) &&
-                    radeon_audio)
+                if ((radeon_connector->audio == RADEON_AUDIO_ENABLE) ||
+                    (drm_detect_hdmi_monitor(radeon_connector->edid) &&
+                     (radeon_connector->audio == RADEON_AUDIO_AUTO)))
                         return ATOM_ENCODER_MODE_HDMI;
                 else if (radeon_connector->use_digital)
                         return ATOM_ENCODER_MODE_DVI;
@@ -718,8 +719,9 @@ atombios_get_encoder_mode(struct drm_encoder *encoder)
         case DRM_MODE_CONNECTOR_DVID:
         case DRM_MODE_CONNECTOR_HDMIA:
         default:
-                if (drm_detect_hdmi_monitor(radeon_connector->edid) &&
-                    radeon_audio)
+                if ((radeon_connector->audio == RADEON_AUDIO_ENABLE) ||
+                    (drm_detect_hdmi_monitor(radeon_connector->edid) &&
+                     (radeon_connector->audio == RADEON_AUDIO_AUTO)))
                         return ATOM_ENCODER_MODE_HDMI;
                 else
                         return ATOM_ENCODER_MODE_DVI;
@@ -732,8 +734,9 @@ atombios_get_encoder_mode(struct drm_encoder *encoder)
                 if ((dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
                     (dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP))
                         return ATOM_ENCODER_MODE_DP;
-                else if (drm_detect_hdmi_monitor(radeon_connector->edid) &&
-                         radeon_audio)
+                else if ((radeon_connector->audio == RADEON_AUDIO_ENABLE) ||
+                         (drm_detect_hdmi_monitor(radeon_connector->edid) &&
+                          (radeon_connector->audio == RADEON_AUDIO_AUTO)))
                         return ATOM_ENCODER_MODE_HDMI;
                 else
                         return ATOM_ENCODER_MODE_DVI;
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 2399f25ec037..cbbdc8500881 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -396,6 +396,21 @@ static int radeon_connector_set_property(struct drm_connector *connector, struct
                 }
         }
 
+        if (property == rdev->mode_info.audio_property) {
+                struct radeon_connector *radeon_connector = to_radeon_connector(connector);
+                /* need to find digital encoder on connector */
+                encoder = radeon_find_encoder(connector, DRM_MODE_ENCODER_TMDS);
+                if (!encoder)
+                        return 0;
+
+                radeon_encoder = to_radeon_encoder(encoder);
+
+                if (radeon_connector->audio != val) {
+                        radeon_connector->audio = val;
+                        radeon_property_change_mode(&radeon_encoder->base);
+                }
+        }
+
         if (property == rdev->mode_info.underscan_property) {
                 /* need to find digital encoder on connector */
                 encoder = radeon_find_encoder(connector, DRM_MODE_ENCODER_TMDS);
@@ -1619,6 +1634,9 @@ radeon_add_atom_connector(struct drm_device *dev,
                         drm_object_attach_property(&radeon_connector->base.base,
                                                       rdev->mode_info.underscan_vborder_property,
                                                       0);
+                        drm_object_attach_property(&radeon_connector->base.base,
+                                                   rdev->mode_info.audio_property,
+                                                   RADEON_AUDIO_DISABLE);
                         subpixel_order = SubPixelHorizontalRGB;
                         connector->interlace_allowed = true;
                         if (connector_type == DRM_MODE_CONNECTOR_HDMIB)
@@ -1708,6 +1726,11 @@ radeon_add_atom_connector(struct drm_device *dev,
                                                               rdev->mode_info.underscan_vborder_property,
                                                               0);
                         }
+                        if (ASIC_IS_DCE2(rdev)) {
+                                drm_object_attach_property(&radeon_connector->base.base,
+                                                              rdev->mode_info.audio_property,
+                                                              RADEON_AUDIO_DISABLE);
+                        }
                         if (connector_type == DRM_MODE_CONNECTOR_DVII) {
                                 radeon_connector->dac_load_detect = true;
                                 drm_object_attach_property(&radeon_connector->base.base,
@@ -1748,6 +1771,11 @@ radeon_add_atom_connector(struct drm_device *dev,
                                                               rdev->mode_info.underscan_vborder_property,
                                                               0);
                         }
+                        if (ASIC_IS_DCE2(rdev)) {
+                                drm_object_attach_property(&radeon_connector->base.base,
+                                                              rdev->mode_info.audio_property,
+                                                              RADEON_AUDIO_DISABLE);
+                        }
                         subpixel_order = SubPixelHorizontalRGB;
                         connector->interlace_allowed = true;
                         if (connector_type == DRM_MODE_CONNECTOR_HDMIB)
@@ -1787,6 +1815,11 @@ radeon_add_atom_connector(struct drm_device *dev,
                                                               rdev->mode_info.underscan_vborder_property,
                                                               0);
                         }
+                        if (ASIC_IS_DCE2(rdev)) {
+                                drm_object_attach_property(&radeon_connector->base.base,
+                                                              rdev->mode_info.audio_property,
+                                                              RADEON_AUDIO_DISABLE);
+                        }
                         connector->interlace_allowed = true;
                         /* in theory with a DP to VGA converter... */
                         connector->doublescan_allowed = false;
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index b055bddaa94c..0d1aa050d41d 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -1172,6 +1172,12 @@ static struct drm_prop_enum_list radeon_underscan_enum_list[] =
         { UNDERSCAN_AUTO, "auto" },
 };
 
+static struct drm_prop_enum_list radeon_audio_enum_list[] =
+{       { RADEON_AUDIO_DISABLE, "off" },
+        { RADEON_AUDIO_ENABLE, "on" },
+        { RADEON_AUDIO_AUTO, "auto" },
+};
+
 static int radeon_modeset_create_props(struct radeon_device *rdev)
 {
         int sz;
@@ -1222,6 +1228,12 @@ static int radeon_modeset_create_props(struct radeon_device *rdev)
         if (!rdev->mode_info.underscan_vborder_property)
                 return -ENOMEM;
 
+        sz = ARRAY_SIZE(radeon_audio_enum_list);
+        rdev->mode_info.audio_property =
+                drm_property_create_enum(rdev->ddev, 0,
+                                         "audio",
+                                         radeon_audio_enum_list, sz);
+
         return 0;
 }
 
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index cb4445f55a96..cdd12dcd988b 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -153,7 +153,7 @@ int radeon_benchmarking = 0;
 int radeon_testing = 0;
 int radeon_connector_table = 0;
 int radeon_tv = 1;
-int radeon_audio = 0;
+int radeon_audio = 1;
 int radeon_disp_priority = 0;
 int radeon_hw_i2c = 0;
 int radeon_pcie_gen2 = -1;
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index d908d8d68f6b..ef63d3f00b2f 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -247,6 +247,8 @@ struct radeon_mode_info {
         struct drm_property *underscan_property;
         struct drm_property *underscan_hborder_property;
         struct drm_property *underscan_vborder_property;
+        /* audio */
+        struct drm_property *audio_property;
         /* hardcoded DFP edid from BIOS */
         struct edid *bios_hardcoded_edid;
         int bios_hardcoded_edid_size;
@@ -471,6 +473,12 @@ struct radeon_router {
         u8 cd_mux_state;
 };
 
+enum radeon_connector_audio {
+        RADEON_AUDIO_DISABLE = 0,
+        RADEON_AUDIO_ENABLE = 1,
+        RADEON_AUDIO_AUTO = 2
+};
+
 struct radeon_connector {
         struct drm_connector base;
         uint32_t connector_id;
@@ -489,6 +497,7 @@ struct radeon_connector {
         struct radeon_hpd hpd;
         struct radeon_router router;
         struct radeon_i2c_chan *router_bus;
+        enum radeon_connector_audio audio;
 };
 
 struct radeon_framebuffer {