diff mbox series

[v6,4/4] ALSA: hda - identify when audio is provided by a video driver

Message ID f53f8a9d04b39a6843f19fe3069d1be7a9713aae.1652113087.git.mchehab@kernel.org
State New
Headers show
Series None | expand

Commit Message

Mauro Carvalho Chehab May 9, 2022, 4:23 p.m. UTC 
On some devices, the hda driver needs to hook into a video driver,
in order to be able to properly access the audio hardware and/or
the power management function.

That's the case of several snd_hda_intel devices that depends on
i915 driver.

Ensure that a proper reference between the snd-hda driver needing
such binding is shown at /proc/modules, in order to allow userspace
to know about such binding.

Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
---

See [PATCH v6 0/4] at: https://lore.kernel.org/all/cover.1652113087.git.mchehab@kernel.org/

 sound/hda/hdac_component.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Daniel Vetter May 11, 2022, 7:51 p.m. UTC | #1 
On Mon, May 09, 2022 at 06:23:39PM +0200, Mauro Carvalho Chehab wrote:
> On some devices, the hda driver needs to hook into a video driver,
> in order to be able to properly access the audio hardware and/or
> the power management function.
> 
> That's the case of several snd_hda_intel devices that depends on
> i915 driver.
> 
> Ensure that a proper reference between the snd-hda driver needing
> such binding is shown at /proc/modules, in order to allow userspace
> to know about such binding.
> 
> Reviewed-by: Takashi Iwai <tiwai@suse.de>
> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
> ---
> 
> See [PATCH v6 0/4] at: https://lore.kernel.org/all/cover.1652113087.git.mchehab@kernel.org/
> 
>  sound/hda/hdac_component.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/sound/hda/hdac_component.c b/sound/hda/hdac_component.c
> index bb37e7e0bd79..7789873ddf47 100644
> --- a/sound/hda/hdac_component.c
> +++ b/sound/hda/hdac_component.c
> @@ -199,7 +199,7 @@ static int hdac_component_master_bind(struct device *dev)
>  	}
>  
>  	/* pin the module to avoid dynamic unbinding, but only if given */
> -	if (!try_module_get(acomp->ops->owner)) {
> +	if (!try_module_get_owner(acomp->ops->owner, dev->driver->owner)) {

I'm still a bit confused why snd-hda does this and why this wasn't put
into component.c, but that's kinda a pre-existing issue and I guess could
be fixed later on. It really shouldn't be anything specific to snd-hda
here.

Anyway I scrolled through the series, it makes a lot more sense than the
intial hack to me, so on the series:

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>

But maybe don't count that as real review :-)

Cheers, Daniel
diff mbox series

Patch

diff --git a/sound/hda/hdac_component.c b/sound/hda/hdac_component.c
index bb37e7e0bd79..7789873ddf47 100644
--- a/sound/hda/hdac_component.c
+++ b/sound/hda/hdac_component.c
@@ -199,7 +199,7 @@  static int hdac_component_master_bind(struct device *dev)
 	}
 
 	/* pin the module to avoid dynamic unbinding, but only if given */
-	if (!try_module_get(acomp->ops->owner)) {
+	if (!try_module_get_owner(acomp->ops->owner, dev->driver->owner)) {
 		ret = -ENODEV;
 		goto out_unbind;
 	}