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| author | Mark Brown <broonie@kernel.org> | 2021-03-31 17:16:14 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-03-31 17:16:14 +0100 |
| commit | ad858508fd6ac58258dd25fd2063a6f6e10426f7 (patch) | |
| tree | 5cec738292f77bbac2b69ccf41699a5c0f075569 /drivers/gpu/drm/meson/meson_drv.c | |
| parent | 326b0037fd6b5fc5640f3d37c80b62e2b3329017 (diff) | |
| parent | a135dfb5de1501327895729b4f513370d2555b4d (diff) | |
| download | linux-ad858508fd6ac58258dd25fd2063a6f6e10426f7.tar.bz2 | |
Merge tag 'mute-led-rework' of https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound into asoc-5.13
ALSA: control - add generic LED API
This patchset tries to resolve the diversity in the audio LED
control among the ALSA drivers. A new control layer registration
is introduced which allows to run additional operations on
top of the elementary ALSA sound controls.
A new control access group (three bits in the access flags)
was introduced to carry the LED group information for
the sound controls. The low-level sound drivers can just
mark those controls using this access group. This information
is not exported to the user space, but user space can
manage the LED sound control associations through sysfs
(last patch) per Mark's request. It makes things fully
configurable in the kernel and user space (UCM).
The actual state ('route') evaluation is really easy
(the minimal value check for all channels / controls / cards).
If there's more complicated logic for a given hardware,
the card driver may eventually export a new read-only
sound control for the LED group and do the logic itself.
The new LED trigger control code is completely separated
and possibly optional (there's no symbol dependency).
The full code separation allows eventually to move this
LED trigger control to the user space in future.
Actually it replaces the already present functionality
in the kernel space (HDA drivers) and allows a quick adoption
for the recent hardware (ASoC codecs including SoundWire).
snd_ctl_led 24576 0
The sound driver implementation is really easy:
1) call snd_ctl_led_request() when control LED layer should be
automatically activated
/ it calls module_request("snd-ctl-led") on demand /
2) mark all related kcontrols with
SNDRV_CTL_ELEM_ACCESS_SPK_LED or
SNDRV_CTL_ELEM_ACCESS_MIC_LED
Link: https://lore.kernel.org/r/20210317172945.842280-1-perex@perex.cz
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'drivers/gpu/drm/meson/meson_drv.c')
| -rw-r--r-- | drivers/gpu/drm/meson/meson_drv.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c index 42c5d3246cfc..453d8b4c5763 100644 --- a/drivers/gpu/drm/meson/meson_drv.c +++ b/drivers/gpu/drm/meson/meson_drv.c @@ -482,6 +482,16 @@ static int meson_probe_remote(struct platform_device *pdev, return count; } +static void meson_drv_shutdown(struct platform_device *pdev) +{ + struct meson_drm *priv = dev_get_drvdata(&pdev->dev); + struct drm_device *drm = priv->drm; + + DRM_DEBUG_DRIVER("\n"); + drm_kms_helper_poll_fini(drm); + drm_atomic_helper_shutdown(drm); +} + static int meson_drv_probe(struct platform_device *pdev) { struct component_match *match = NULL; @@ -553,6 +563,7 @@ static const struct dev_pm_ops meson_drv_pm_ops = { static struct platform_driver meson_drm_platform_driver = { .probe = meson_drv_probe, + .shutdown = meson_drv_shutdown, .driver = { .name = "meson-drm", .of_match_table = dt_match, |