This patch adds the support for the notification of HD-audio hotplug
via the already existing drm_audio_component framework to radeon
driver. This allows us more reliable hotplug notification and ELD
transfer without accessing HD-audio bus; it's more efficient, and more
importantly, it works without waking up the runtime PM.
The implementation is rather simplistic: radeon driver provides the
get_eld ops for HD-audio, and it notifies the audio hotplug via
pin_eld_notify callback upon each radeon_audio_enable() call.
The pin->id is referred as the port number passed to the notifier
callback, and the corresponding connector is looked through the
encoder list in the get_eld callback in turn.
The bind and unbind callbacks handle the device-link so that it
assures the PM call order.
Acked-by: Jim Qu <Jim.Qu@xxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
drivers/gpu/drm/Kconfig | 1 +
drivers/gpu/drm/radeon/radeon.h | 3 ++
drivers/gpu/drm/radeon/radeon_audio.c | 92 +++++++++++++++++++++++++++++++++++
3 files changed, 96 insertions(+)
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 1d80222587ad..8b44cc458830 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -209,6 +209,7 @@ config DRM_RADEON
select HWMON
select BACKLIGHT_CLASS_DEVICE
select INTERVAL_TREE
+ select SND_HDA_COMPONENT if SND_HDA_CORE
help
Choose this option if you have an ATI Radeon graphics card. There
are both PCI and AGP versions. You don't need to choose this to
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 32808e50be12..2973284b7961 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -75,6 +75,7 @@
#include <drm/ttm/ttm_execbuf_util.h>
#include <drm/drm_gem.h>
+#include <drm/drm_audio_component.h>
#include "radeon_family.h"
#include "radeon_mode.h"
@@ -1761,6 +1762,8 @@ struct r600_audio {
struct radeon_audio_funcs *hdmi_funcs;
struct radeon_audio_funcs *dp_funcs;
struct radeon_audio_basic_funcs *funcs;
+ struct drm_audio_component *component;
+ bool component_registered;
};
/*
diff --git a/drivers/gpu/drm/radeon/radeon_audio.c b/drivers/gpu/drm/radeon/radeon_audio.c
index b9aea5776d3d..976502e31c43 100644
--- a/drivers/gpu/drm/radeon/radeon_audio.c
+++ b/drivers/gpu/drm/radeon/radeon_audio.c
@@ -23,6 +23,7 @@
*/
#include <linux/gcd.h>
+#include <linux/component.h>
#include <drm/drm_crtc.h>
#include "radeon.h"
@@ -242,6 +243,14 @@ static struct radeon_audio_funcs dce6_dp_funcs = {
.dpms = evergreen_dp_enable,
};
+static void radeon_audio_component_notify(struct drm_audio_component *acomp,
+ int port)
+{
+ if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
+ acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr,
+ port, -1);
+}
+
static void radeon_audio_enable(struct radeon_device *rdev,
struct r600_audio_pin *pin, u8 enable_mask)
{
@@ -269,6 +278,8 @@ static void radeon_audio_enable(struct radeon_device *rdev,
if (rdev->audio.funcs->enable)
rdev->audio.funcs->enable(rdev, pin, enable_mask);
+
+ radeon_audio_component_notify(rdev->audio.component, pin->id);
}
static void radeon_audio_interface_init(struct radeon_device *rdev)
@@ -292,6 +303,79 @@ static void radeon_audio_interface_init(struct radeon_device *rdev)
}
}
+static int radeon_audio_component_get_eld(struct device *kdev, int port,
+ int pipe, bool *enabled,
+ unsigned char *buf, int max_bytes)
+{
+ struct drm_device *dev = dev_get_drvdata(kdev);
+ struct drm_encoder *encoder;
+ struct radeon_encoder *radeon_encoder;
+ struct radeon_encoder_atom_dig *dig;
+ struct drm_connector *connector;
+ int ret = 0;
+
+ *enabled = false;
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+ if (!radeon_encoder_is_digital(encoder))
+ continue;
+ radeon_encoder = to_radeon_encoder(encoder);
+ dig = radeon_encoder->enc_priv;
+ if (!dig->pin || dig->pin->id != port)
+ continue;
+ connector = radeon_get_connector_for_encoder(encoder);
+ if (connector) {
+ *enabled = true;
+ ret = drm_eld_size(connector->eld);
+ memcpy(buf, connector->eld, min(max_bytes, ret));
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static const struct drm_audio_component_ops radeon_audio_component_ops = {
+ .get_eld = radeon_audio_component_get_eld,
+};
+
+static int radeon_audio_component_bind(struct device *kdev,
+ struct device *hda_kdev, void *data)
+{
+ struct drm_device *dev = dev_get_drvdata(kdev);
+ struct radeon_device *rdev = dev->dev_private;
+ struct drm_audio_component *acomp = data;
+
+ if (WARN_ON(!device_link_add(hda_kdev, kdev, DL_FLAG_STATELESS)))
+ return -ENOMEM;
+
+ drm_modeset_lock_all(dev);
+ acomp->ops = &radeon_audio_component_ops;
+ acomp->dev = kdev;
+ rdev->audio.component = acomp;
+ drm_modeset_unlock_all(dev);
+
+ return 0;
+}
+
+static void radeon_audio_component_unbind(struct device *kdev,
+ struct device *hda_kdev, void *data)
+{
+ struct drm_device *dev = dev_get_drvdata(kdev);
+ struct radeon_device *rdev = dev->dev_private;
+ struct drm_audio_component *acomp = data;
+
+ drm_modeset_lock_all(dev);
+ rdev->audio.component = NULL;
+ acomp->ops = NULL;
+ acomp->dev = NULL;
+ drm_modeset_unlock_all(dev);
+}
+
+static const struct component_ops radeon_audio_component_bind_ops = {
+ .bind = radeon_audio_component_bind,
+ .unbind = radeon_audio_component_unbind,
+};
+
static int radeon_audio_chipset_supported(struct radeon_device *rdev)
{
return ASIC_IS_DCE2(rdev) && !ASIC_IS_NODCE(rdev);
@@ -338,6 +422,9 @@ int radeon_audio_init(struct radeon_device *rdev)
for (i = 0; i < rdev->audio.num_pins; i++)
radeon_audio_enable(rdev, &rdev->audio.pin[i], 0);
+ if (!component_add(rdev->dev, &radeon_audio_component_bind_ops))
+ rdev->audio.component_registered = true;
+
return 0;
}
@@ -490,6 +577,11 @@ void radeon_audio_fini(struct radeon_device *rdev)
radeon_audio_enable(rdev, &rdev->audio.pin[i], 0);
rdev->audio.enabled = false;
+
+ if (rdev->audio.component_registered) {
+ component_del(rdev->dev, &radeon_audio_component_bind_ops);
+ rdev->audio.component_registered = false;
+ }
}
static void radeon_audio_set_dto(struct drm_encoder *encoder, unsigned int clock)
--
2.16.4
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