leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm/nouveau: Add HD-audio component notifier support

Browse Source 
This patch adds the support for the notification of HD-audio hotplug
via the already existing drm_audio_component framework.  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: nouveau driver provides the
get_eld ops for HD-audio, and it notifies the audio hotplug via
pin_eld_notify callback upon each nv50_audio_enable() and _disable()
call.  As the HD-audio pin assignment seems corresponding to the CRTC,
the crtc->index number is passed directly as the zero-based port
number.

The bind and unbind callbacks handle the device-link so that it
assures the PM call order.

Link: https://lore.kernel.org/r/20190722143815.7339-3-tiwai@suse.de
Reviewed-by: Lyude Paul <lyude@redhat.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Takashi Iwai 2020-01-13 15:17:21 +01:00 committed by Ben Skeggs
parent ee8642162a
commit 742db30c4e
3 changed files with 119 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/nouveau/Kconfig
View File

@ -17,6 +17,7 @@ config DRM_NOUVEAU
select INPUT if ACPI && X86
select THERMAL if ACPI && X86
select ACPI_VIDEO if ACPI && X86
select SND_HDA_COMPONENT if SND_HDA_CORE
help
Choose this option for open-source NVIDIA support.

111
drivers/gpu/drm/nouveau/dispnv50/disp.c
View File

@ -29,6 +29,7 @@
#include <linux/dma-mapping.h>
#include <linux/hdmi.h>
#include <linux/component.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_dp_helper.h>
@ -476,12 +477,113 @@ nv50_dac_create(struct drm_connector *connector, struct dcb_output *dcbe)
return 0;
}
/*
* audio component binding for ELD notification
*/
static void
nv50_audio_component_eld_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 int
nv50_audio_component_get_eld(struct device *kdev, int port, int pipe,
bool *enabled, unsigned char *buf, int max_bytes)
{
struct drm_device *drm_dev = dev_get_drvdata(kdev);
struct nouveau_drm *drm = nouveau_drm(drm_dev);
struct drm_encoder *encoder;
struct nouveau_encoder *nv_encoder;
struct nouveau_connector *nv_connector;
struct nouveau_crtc *nv_crtc;
int ret = 0;
*enabled = false;
drm_for_each_encoder(encoder, drm->dev) {
nv_encoder = nouveau_encoder(encoder);
nv_connector = nouveau_encoder_connector_get(nv_encoder);
nv_crtc = nouveau_crtc(encoder->crtc);
if (!nv_connector || !nv_crtc || nv_crtc->index != port)
continue;
*enabled = drm_detect_monitor_audio(nv_connector->edid);
if (*enabled) {
ret = drm_eld_size(nv_connector->base.eld);
memcpy(buf, nv_connector->base.eld,
min(max_bytes, ret));
}
break;
}
return ret;
}
static const struct drm_audio_component_ops nv50_audio_component_ops = {
.get_eld = nv50_audio_component_get_eld,
};
static int
nv50_audio_component_bind(struct device *kdev, struct device *hda_kdev,
void *data)
{
struct drm_device *drm_dev = dev_get_drvdata(kdev);
struct nouveau_drm *drm = nouveau_drm(drm_dev);
struct drm_audio_component *acomp = data;
if (WARN_ON(!device_link_add(hda_kdev, kdev, DL_FLAG_STATELESS)))
return -ENOMEM;
drm_modeset_lock_all(drm_dev);
acomp->ops = &nv50_audio_component_ops;
acomp->dev = kdev;
drm->audio.component = acomp;
drm_modeset_unlock_all(drm_dev);
return 0;
}
static void
nv50_audio_component_unbind(struct device *kdev, struct device *hda_kdev,
void *data)
{
struct drm_device *drm_dev = dev_get_drvdata(kdev);
struct nouveau_drm *drm = nouveau_drm(drm_dev);
struct drm_audio_component *acomp = data;
drm_modeset_lock_all(drm_dev);
drm->audio.component = NULL;
acomp->ops = NULL;
acomp->dev = NULL;
drm_modeset_unlock_all(drm_dev);
}
static const struct component_ops nv50_audio_component_bind_ops = {
.bind = nv50_audio_component_bind,
.unbind = nv50_audio_component_unbind,
};
static void
nv50_audio_component_init(struct nouveau_drm *drm)
{
if (!component_add(drm->dev->dev, &nv50_audio_component_bind_ops))
drm->audio.component_registered = true;
}
static void
nv50_audio_component_fini(struct nouveau_drm *drm)
{
if (drm->audio.component_registered) {
component_del(drm->dev->dev, &nv50_audio_component_bind_ops);
drm->audio.component_registered = false;
}
}
/******************************************************************************
* Audio
*****************************************************************************/
static void
nv50_audio_disable(struct drm_encoder *encoder, struct nouveau_crtc *nv_crtc)
{
struct nouveau_drm *drm = nouveau_drm(encoder->dev);
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
struct nv50_disp *disp = nv50_disp(encoder->dev);
struct {
@ -496,11 +598,14 @@ nv50_audio_disable(struct drm_encoder *encoder, struct nouveau_crtc *nv_crtc)
};
nvif_mthd(&disp->disp->object, 0, &args, sizeof(args));
nv50_audio_component_eld_notify(drm->audio.component, nv_crtc->index);
}
static void
nv50_audio_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
{
struct nouveau_drm *drm = nouveau_drm(encoder->dev);
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
struct nouveau_connector *nv_connector;
@ -527,6 +632,8 @@ nv50_audio_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
nvif_mthd(&disp->disp->object, 0, &args,
sizeof(args.base) + drm_eld_size(args.data));
nv50_audio_component_eld_notify(drm->audio.component, nv_crtc->index);
}
/******************************************************************************
@ -2296,6 +2403,8 @@ nv50_display_destroy(struct drm_device *dev)
{
struct nv50_disp *disp = nv50_disp(dev);
nv50_audio_component_fini(nouveau_drm(dev));
nv50_core_del(&disp->core);
nouveau_bo_unmap(disp->sync);
@ -2444,6 +2553,8 @@ nv50_display_create(struct drm_device *dev)
/* Disable vblank irqs aggressively for power-saving, safe on nv50+ */
dev->vblank_disable_immediate = true;
nv50_audio_component_init(drm);
out:
if (ret)
nv50_display_destroy(dev);

7
drivers/gpu/drm/nouveau/nouveau_drv.h
View File

@ -58,6 +58,8 @@
#include <drm/ttm/ttm_module.h>
#include <drm/ttm/ttm_page_alloc.h>
#include <drm/drm_audio_component.h>
#include "uapi/drm/nouveau_drm.h"
struct nouveau_channel;
@ -211,6 +213,11 @@ struct nouveau_drm {
struct nouveau_svm *svm;
struct nouveau_dmem *dmem;
struct {
struct drm_audio_component *component;
bool component_registered;
} audio;
};
static inline struct nouveau_drm *