[alsa-devel] [PATCH] ALSA: jack: create jack kcontrols for every jack input device
From: Liam Girdwood liam.r.girdwood@linux.intel.com
Currently the ALSA jack core registers only input devices for each jack registered. These jack input devices are not readable by userspace devices that run as non root.
This patch adds support for additionally registering jack kcontrol devices for every input jack registered. This allows non root userspace to read jack status.
Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com Modified-by: Jie Yang yang.jie@intel.com Signed-off-by: Jie Yang yang.jie@intel.com Reveiwed-by: Mark Brown broonie@kernel.org --- include/sound/control.h | 2 ++ include/sound/jack.h | 2 ++ sound/core/jack.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++-- 3 files changed, 91 insertions(+), 2 deletions(-) mode change 100644 => 100755 sound/core/jack.c
diff --git a/include/sound/control.h b/include/sound/control.h index 75f3054..023b70a 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -66,6 +66,7 @@ struct snd_kcontrol_volatile {
struct snd_kcontrol { struct list_head list; /* list of controls */ + struct list_head jack_list; /* list of controls belong to the same jack*/ struct snd_ctl_elem_id id; unsigned int count; /* count of same elements */ snd_kcontrol_info_t *info; @@ -75,6 +76,7 @@ struct snd_kcontrol { snd_kcontrol_tlv_rw_t *c; const unsigned int *p; } tlv; + unsigned int jack_bit_idx; /*the corresponding jack type bit index */ unsigned long private_value; void *private_data; void (*private_free)(struct snd_kcontrol *kcontrol); diff --git a/include/sound/jack.h b/include/sound/jack.h index 2182350..477dcb4 100644 --- a/include/sound/jack.h +++ b/include/sound/jack.h @@ -73,6 +73,8 @@ enum snd_jack_types {
struct snd_jack { struct input_dev *input_dev; + struct list_head kctl_list; + struct snd_card *card; int registered; int type; const char *id; diff --git a/sound/core/jack.c b/sound/core/jack.c old mode 100644 new mode 100755 index 8658578..c067b6a --- a/sound/core/jack.c +++ b/sound/core/jack.c @@ -24,6 +24,7 @@ #include <linux/module.h> #include <sound/jack.h> #include <sound/core.h> +#include <sound/control.h>
static int jack_switch_types[SND_JACK_SWITCH_TYPES] = { SW_HEADPHONE_INSERT, @@ -54,7 +55,13 @@ static int snd_jack_dev_disconnect(struct snd_device *device) static int snd_jack_dev_free(struct snd_device *device) { struct snd_jack *jack = device->device_data; + struct snd_card *card = device->card; + struct snd_kcontrol *kctl;
+ list_for_each_entry(kctl, &jack->kctl_list, jack_list) { + list_del(&kctl->jack_list); + snd_ctl_remove(card, kctl); + } if (jack->private_free) jack->private_free(jack);
@@ -100,6 +107,63 @@ static int snd_jack_dev_register(struct snd_device *device) return err; }
+ +/* get the first unused/available index number for the given kctl name */ +static int get_available_index(struct snd_card *card, const char *name) +{ + struct snd_kcontrol *kctl; + int idx = 0; + int len = strlen(name); + + down_write(&card->controls_rwsem); + next: + list_for_each_entry(kctl, &card->controls, list) { + if (!strncmp(name, kctl->id.name, len) && + !strcmp(" Jack", kctl->id.name + len) && + kctl->id.index == idx) { + idx++; + goto next; + } + } + up_write(&card->controls_rwsem); + return idx; +} + +static void kctl_private_free(struct snd_kcontrol *kctl) +{ + list_del(&kctl->jack_list); +} + +static int snd_jack_new_kctl(struct snd_card *card, struct snd_jack *jack, int type) +{ + struct snd_kcontrol *kctl; + int i, err, index, state = 0 /* use 0 for default state ?? */; + + INIT_LIST_HEAD(&jack->kctl_list); + for (i = 0; i < fls(SND_JACK_BTN_0); i++) { + int testbit = 1 << i; + if (type & testbit) { + index = get_available_index(card,jack->id); + kctl = snd_kctl_jack_new(jack->id, index, card); + if (!kctl) + return -ENOMEM; + kctl->private_free = kctl_private_free; + /* use jack_bit_idx for the kctl type bit */ + kctl->jack_bit_idx = i; + + err = snd_ctl_add(card, kctl); + if (err < 0) + return err; + list_add_tail(&kctl->jack_list, &jack->kctl_list); + + /* set initial jack state */ + snd_kctl_jack_report(card, kctl, state & testbit); + } + } + + return 0; +} + /** * snd_jack_new - Create a new jack * @card: the card instance @@ -138,7 +202,7 @@ int snd_jack_new(struct snd_card *card, const char *id, int type, }
jack->input_dev->phys = "ALSA"; - + jack->card = card; jack->type = type;
for (i = 0; i < SND_JACK_SWITCH_TYPES; i++) @@ -150,10 +214,17 @@ int snd_jack_new(struct snd_card *card, const char *id, int type, if (err < 0) goto fail_input;
+ /* register jack kcontrols */ + err = snd_jack_new_kctl(card, jack, type); + if (err < 0) + goto fail_kctl; + *jjack = jack;
return 0;
+fail_kctl: + snd_device_free(card, jack); fail_input: input_free_device(jack->input_dev); kfree(jack->id); @@ -230,6 +301,7 @@ EXPORT_SYMBOL(snd_jack_set_key); */ void snd_jack_report(struct snd_jack *jack, int status) { + struct snd_kcontrol *kctl; int i;
if (!jack) @@ -245,13 +317,26 @@ void snd_jack_report(struct snd_jack *jack, int status)
for (i = 0; i < ARRAY_SIZE(jack_switch_types); i++) { int testbit = 1 << i; - if (jack->type & testbit) + if (jack->type & testbit) { input_report_switch(jack->input_dev, jack_switch_types[i], status & testbit); + } }
input_sync(jack->input_dev); + + for (i = 0; i < fls(SND_JACK_BTN_0); i++) { + int testbit = 1 << i; + if (jack->type & testbit) { + list_for_each_entry(kctl, &jack->kctl_list, jack_list) { + if (kctl->jack_bit_idx == i) { + snd_kctl_jack_report(jack->card, kctl, + status & testbit); + } + } + } + } } EXPORT_SYMBOL(snd_jack_report);
On Thu, 2015-03-19 at 16:40 +0800, Jie Yang wrote:
From: Liam Girdwood liam.r.girdwood@linux.intel.com
I cant claim much credit for this as it's mostly your work now :)
Liam
Currently the ALSA jack core registers only input devices for each jack registered. These jack input devices are not readable by userspace devices that run as non root.
This patch adds support for additionally registering jack kcontrol devices for every input jack registered. This allows non root userspace to read jack status.
Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com Modified-by: Jie Yang yang.jie@intel.com Signed-off-by: Jie Yang yang.jie@intel.com Reveiwed-by: Mark Brown broonie@kernel.org
include/sound/control.h | 2 ++ include/sound/jack.h | 2 ++ sound/core/jack.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++-- 3 files changed, 91 insertions(+), 2 deletions(-) mode change 100644 => 100755 sound/core/jack.c
diff --git a/include/sound/control.h b/include/sound/control.h index 75f3054..023b70a 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -66,6 +66,7 @@ struct snd_kcontrol_volatile {
struct snd_kcontrol { struct list_head list; /* list of controls */
- struct list_head jack_list; /* list of controls belong to the same jack*/ struct snd_ctl_elem_id id; unsigned int count; /* count of same elements */ snd_kcontrol_info_t *info;
@@ -75,6 +76,7 @@ struct snd_kcontrol { snd_kcontrol_tlv_rw_t *c; const unsigned int *p; } tlv;
- unsigned int jack_bit_idx; /*the corresponding jack type bit index */ unsigned long private_value; void *private_data; void (*private_free)(struct snd_kcontrol *kcontrol);
diff --git a/include/sound/jack.h b/include/sound/jack.h index 2182350..477dcb4 100644 --- a/include/sound/jack.h +++ b/include/sound/jack.h @@ -73,6 +73,8 @@ enum snd_jack_types {
struct snd_jack { struct input_dev *input_dev;
- struct list_head kctl_list;
- struct snd_card *card; int registered; int type; const char *id;
diff --git a/sound/core/jack.c b/sound/core/jack.c old mode 100644 new mode 100755 index 8658578..c067b6a --- a/sound/core/jack.c +++ b/sound/core/jack.c @@ -24,6 +24,7 @@ #include <linux/module.h> #include <sound/jack.h> #include <sound/core.h> +#include <sound/control.h>
static int jack_switch_types[SND_JACK_SWITCH_TYPES] = { SW_HEADPHONE_INSERT, @@ -54,7 +55,13 @@ static int snd_jack_dev_disconnect(struct snd_device *device) static int snd_jack_dev_free(struct snd_device *device) { struct snd_jack *jack = device->device_data;
struct snd_card *card = device->card;
struct snd_kcontrol *kctl;
list_for_each_entry(kctl, &jack->kctl_list, jack_list) {
list_del(&kctl->jack_list);
This is not safe, as we cant iterate over a list when we are removing items using list_for_each_entry(). There are other list methods in list.h to safely iterate and remove items.
snd_ctl_remove(card, kctl);- } if (jack->private_free) jack->private_free(jack);
@@ -100,6 +107,63 @@ static int snd_jack_dev_register(struct snd_device *device) return err; }
+/* get the first unused/available index number for the given kctl name */ +static int get_available_index(struct snd_card *card, const char *name) +{
- struct snd_kcontrol *kctl;
- int idx = 0;
- int len = strlen(name);
- down_write(&card->controls_rwsem);
- next:
- list_for_each_entry(kctl, &card->controls, list) {
if (!strncmp(name, kctl->id.name, len) &&!strcmp(" Jack", kctl->id.name + len) &&kctl->id.index == idx) {idx++;goto next;
Wont continue work here instead of goto ?
}- }
- up_write(&card->controls_rwsem);
- return idx;
+}
+static void kctl_private_free(struct snd_kcontrol *kctl) +{
- list_del(&kctl->jack_list);
+}
+static int snd_jack_new_kctl(struct snd_card *card, struct snd_jack *jack, int type) +{
- struct snd_kcontrol *kctl;
- int i, err, index, state = 0 /* use 0 for default state ?? */;
- INIT_LIST_HEAD(&jack->kctl_list);
- for (i = 0; i < fls(SND_JACK_BTN_0); i++) {
int testbit = 1 << i;if (type & testbit) {index = get_available_index(card,jack->id);kctl = snd_kctl_jack_new(jack->id, index, card);if (!kctl)return -ENOMEM;kctl->private_free = kctl_private_free;/* use jack_bit_idx for the kctl type bit */kctl->jack_bit_idx = i;
This section above could do with some new lines to break the code into logical chunks.
err = snd_ctl_add(card, kctl);if (err < 0)return err;list_add_tail(&kctl->jack_list, &jack->kctl_list);/* set initial jack state */snd_kctl_jack_report(card, kctl, state & testbit);}- }
- return 0;
+}
/**
- snd_jack_new - Create a new jack
- @card: the card instance
@@ -138,7 +202,7 @@ int snd_jack_new(struct snd_card *card, const char *id, int type, }
jack->input_dev->phys = "ALSA";
jack->card = card; jack->type = type;
for (i = 0; i < SND_JACK_SWITCH_TYPES; i++)
@@ -150,10 +214,17 @@ int snd_jack_new(struct snd_card *card, const char *id, int type, if (err < 0) goto fail_input;
/* register jack kcontrols */
err = snd_jack_new_kctl(card, jack, type);
if (err < 0)
goto fail_kctl;*jjack = jack;
return 0;
+fail_kctl:
- snd_device_free(card, jack);
fail_input: input_free_device(jack->input_dev); kfree(jack->id); @@ -230,6 +301,7 @@ EXPORT_SYMBOL(snd_jack_set_key); */ void snd_jack_report(struct snd_jack *jack, int status) {
struct snd_kcontrol *kctl; int i;
if (!jack)
@@ -245,13 +317,26 @@ void snd_jack_report(struct snd_jack *jack, int status)
for (i = 0; i < ARRAY_SIZE(jack_switch_types); i++) { int testbit = 1 << i;
if (jack->type & testbit)
if (jack->type & testbit) { input_report_switch(jack->input_dev, jack_switch_types[i], status & testbit);}}
input_sync(jack->input_dev);
for (i = 0; i < fls(SND_JACK_BTN_0); i++) {
int testbit = 1 << i;if (jack->type & testbit) {list_for_each_entry(kctl, &jack->kctl_list, jack_list) {if (kctl->jack_bit_idx == i) {snd_kctl_jack_report(jack->card, kctl,status & testbit);}}}}
} EXPORT_SYMBOL(snd_jack_report);
Liam
On Thu, 2015-03-19 at 08:53 +0000, Liam Girdwood wrote:
On Thu, 2015-03-19 at 16:40 +0800, Jie Yang wrote:
From: Liam Girdwood liam.r.girdwood@linux.intel.com
I cant claim much credit for this as it's mostly your work now :)
Liam
Sorry, I had more comments below... also got one more new one
Currently the ALSA jack core registers only input devices for each jack registered. These jack input devices are not readable by userspace devices that run as non root.
This patch adds support for additionally registering jack kcontrol devices for every input jack registered. This allows non root userspace to read jack status.
Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com Modified-by: Jie Yang yang.jie@intel.com Signed-off-by: Jie Yang yang.jie@intel.com Reveiwed-by: Mark Brown broonie@kernel.org
include/sound/control.h | 2 ++ include/sound/jack.h | 2 ++ sound/core/jack.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++-- 3 files changed, 91 insertions(+), 2 deletions(-) mode change 100644 => 100755 sound/core/jack.c
diff --git a/include/sound/control.h b/include/sound/control.h index 75f3054..023b70a 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -66,6 +66,7 @@ struct snd_kcontrol_volatile {
struct snd_kcontrol { struct list_head list; /* list of controls */
- struct list_head jack_list; /* list of controls belong to the same jack*/ struct snd_ctl_elem_id id; unsigned int count; /* count of same elements */ snd_kcontrol_info_t *info;
@@ -75,6 +76,7 @@ struct snd_kcontrol { snd_kcontrol_tlv_rw_t *c; const unsigned int *p; } tlv;
- unsigned int jack_bit_idx; /*the corresponding jack type bit index */ unsigned long private_value; void *private_data; void (*private_free)(struct snd_kcontrol *kcontrol);
diff --git a/include/sound/jack.h b/include/sound/jack.h index 2182350..477dcb4 100644 --- a/include/sound/jack.h +++ b/include/sound/jack.h @@ -73,6 +73,8 @@ enum snd_jack_types {
struct snd_jack { struct input_dev *input_dev;
- struct list_head kctl_list;
- struct snd_card *card; int registered; int type; const char *id;
diff --git a/sound/core/jack.c b/sound/core/jack.c old mode 100644 new mode 100755 index 8658578..c067b6a --- a/sound/core/jack.c +++ b/sound/core/jack.c @@ -24,6 +24,7 @@ #include <linux/module.h> #include <sound/jack.h> #include <sound/core.h> +#include <sound/control.h>
static int jack_switch_types[SND_JACK_SWITCH_TYPES] = { SW_HEADPHONE_INSERT, @@ -54,7 +55,13 @@ static int snd_jack_dev_disconnect(struct snd_device *device) static int snd_jack_dev_free(struct snd_device *device) { struct snd_jack *jack = device->device_data;
struct snd_card *card = device->card;
struct snd_kcontrol *kctl;
list_for_each_entry(kctl, &jack->kctl_list, jack_list) {
list_del(&kctl->jack_list);This is not safe, as we cant iterate over a list when we are removing items using list_for_each_entry(). There are other list methods in list.h to safely iterate and remove items.
snd_ctl_remove(card, kctl);- } if (jack->private_free) jack->private_free(jack);
@@ -100,6 +107,63 @@ static int snd_jack_dev_register(struct snd_device *device) return err; }
+/* get the first unused/available index number for the given kctl name */ +static int get_available_index(struct snd_card *card, const char *name) +{
- struct snd_kcontrol *kctl;
- int idx = 0;
- int len = strlen(name);
- down_write(&card->controls_rwsem);
I think we are only reading the card state below so we can use down_read().
- next:
- list_for_each_entry(kctl, &card->controls, list) {
if (!strncmp(name, kctl->id.name, len) &&!strcmp(" Jack", kctl->id.name + len) &&kctl->id.index == idx) {idx++;goto next;Wont continue work here instead of goto ?
}- }
- up_write(&card->controls_rwsem);
- return idx;
+}
+static void kctl_private_free(struct snd_kcontrol *kctl) +{
- list_del(&kctl->jack_list);
+}
+static int snd_jack_new_kctl(struct snd_card *card, struct snd_jack *jack, int type) +{
- struct snd_kcontrol *kctl;
- int i, err, index, state = 0 /* use 0 for default state ?? */;
- INIT_LIST_HEAD(&jack->kctl_list);
- for (i = 0; i < fls(SND_JACK_BTN_0); i++) {
int testbit = 1 << i;if (type & testbit) {index = get_available_index(card,jack->id);kctl = snd_kctl_jack_new(jack->id, index, card);if (!kctl)return -ENOMEM;kctl->private_free = kctl_private_free;/* use jack_bit_idx for the kctl type bit */kctl->jack_bit_idx = i;This section above could do with some new lines to break the code into logical chunks.
err = snd_ctl_add(card, kctl);if (err < 0)return err;list_add_tail(&kctl->jack_list, &jack->kctl_list);/* set initial jack state */snd_kctl_jack_report(card, kctl, state & testbit);}- }
- return 0;
+}
/**
- snd_jack_new - Create a new jack
- @card: the card instance
@@ -138,7 +202,7 @@ int snd_jack_new(struct snd_card *card, const char *id, int type, }
jack->input_dev->phys = "ALSA";
jack->card = card; jack->type = type;
for (i = 0; i < SND_JACK_SWITCH_TYPES; i++)
@@ -150,10 +214,17 @@ int snd_jack_new(struct snd_card *card, const char *id, int type, if (err < 0) goto fail_input;
/* register jack kcontrols */
err = snd_jack_new_kctl(card, jack, type);
if (err < 0)
goto fail_kctl;*jjack = jack;
return 0;
+fail_kctl:
- snd_device_free(card, jack);
fail_input: input_free_device(jack->input_dev); kfree(jack->id); @@ -230,6 +301,7 @@ EXPORT_SYMBOL(snd_jack_set_key); */ void snd_jack_report(struct snd_jack *jack, int status) {
struct snd_kcontrol *kctl; int i;
if (!jack)
@@ -245,13 +317,26 @@ void snd_jack_report(struct snd_jack *jack, int status)
for (i = 0; i < ARRAY_SIZE(jack_switch_types); i++) { int testbit = 1 << i;
if (jack->type & testbit)
if (jack->type & testbit) { input_report_switch(jack->input_dev, jack_switch_types[i], status & testbit);}}
input_sync(jack->input_dev);
for (i = 0; i < fls(SND_JACK_BTN_0); i++) {
int testbit = 1 << i;if (jack->type & testbit) {list_for_each_entry(kctl, &jack->kctl_list, jack_list) {if (kctl->jack_bit_idx == i) {snd_kctl_jack_report(jack->card, kctl,status & testbit);}}}}
} EXPORT_SYMBOL(snd_jack_report);
Liam
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-----Original Message----- From: Liam Girdwood [mailto:liam.r.girdwood@linux.intel.com] Sent: Thursday, March 19, 2015 4:54 PM To: Jie, Yang Cc: tiwai@suse.de; perex@perex.cz; broonie@kernel.org; alsa-devel@alsa- project.org Subject: Re: [PATCH] ALSA: jack: create jack kcontrols for every jack input device
On Thu, 2015-03-19 at 16:40 +0800, Jie Yang wrote:
From: Liam Girdwood liam.r.girdwood@linux.intel.com
I cant claim much credit for this as it's mostly your work now :)
[Keyon] OK, I will change it, thanks. :)
Liam
Currently the ALSA jack core registers only input devices for each jack registered. These jack input devices are not readable by userspace devices that run as non root.
This patch adds support for additionally registering jack kcontrol devices for every input jack registered. This allows non root userspace to read jack status.
Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com Modified-by: Jie Yang yang.jie@intel.com Signed-off-by: Jie Yang yang.jie@intel.com Reveiwed-by: Mark Brown broonie@kernel.org
include/sound/control.h | 2 ++ include/sound/jack.h | 2 ++ sound/core/jack.c | 89
+++++++++++++++++++++++++++++++++++++++++++++++--
3 files changed, 91 insertions(+), 2 deletions(-) mode change 100644 => 100755 sound/core/jack.c
diff --git a/include/sound/control.h b/include/sound/control.h index 75f3054..023b70a 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -66,6 +66,7 @@ struct snd_kcontrol_volatile {
struct snd_kcontrol { struct list_head list; /* list of controls */
- struct list_head jack_list; /* list of controls belong to
the same jack*/
struct snd_ctl_elem_id id; unsigned int count; /* count of same elements */ snd_kcontrol_info_t *info; @@ -75,6 +76,7 @@ struct snd_kcontrol { snd_kcontrol_tlv_rw_t *c; const unsigned int *p; } tlv;
- unsigned int jack_bit_idx; /*the corresponding jack type bit
index */
unsigned long private_value; void *private_data; void (*private_free)(struct snd_kcontrol *kcontrol); diff --git a/include/sound/jack.h b/include/sound/jack.h index 2182350..477dcb4 100644 --- a/include/sound/jack.h +++ b/include/sound/jack.h @@ -73,6 +73,8 @@ enum snd_jack_types {
struct snd_jack { struct input_dev *input_dev;
- struct list_head kctl_list;
- struct snd_card *card; int registered; int type; const char *id;
diff --git a/sound/core/jack.c b/sound/core/jack.c old mode 100644 new mode 100755 index 8658578..c067b6a --- a/sound/core/jack.c +++ b/sound/core/jack.c @@ -24,6 +24,7 @@ #include <linux/module.h> #include <sound/jack.h> #include <sound/core.h> +#include <sound/control.h>
static int jack_switch_types[SND_JACK_SWITCH_TYPES] = { SW_HEADPHONE_INSERT, @@ -54,7 +55,13 @@ static int snd_jack_dev_disconnect(struct snd_device *device) static int snd_jack_dev_free(struct snd_device *device) { struct snd_jack *jack = device->device_data;
struct snd_card *card = device->card;
struct snd_kcontrol *kctl;
list_for_each_entry(kctl, &jack->kctl_list, jack_list) {
list_del(&kctl->jack_list);This is not safe, as we cant iterate over a list when we are removing items using list_for_each_entry(). There are other list methods in list.h to safely iterate and remove items.
[Keyon] thanks for pointing out this, will modify it.
snd_ctl_remove(card, kctl);- } if (jack->private_free) jack->private_free(jack);
@@ -100,6 +107,63 @@ static int snd_jack_dev_register(struct snd_device
*device)
return err; }
+/* get the first unused/available index number for the given kctl +name */ static int get_available_index(struct snd_card *card, const +char *name) {
- struct snd_kcontrol *kctl;
- int idx = 0;
- int len = strlen(name);
- down_write(&card->controls_rwsem);
- next:
- list_for_each_entry(kctl, &card->controls, list) {
if (!strncmp(name, kctl->id.name, len) &&!strcmp(" Jack", kctl->id.name + len) &&kctl->id.index == idx) {idx++;goto next;Wont continue work here instead of goto ?
[Keyon] we need goto to iterate the list again with bigger idx.
}- }
- up_write(&card->controls_rwsem);
- return idx;
+}
+static void kctl_private_free(struct snd_kcontrol *kctl) {
- list_del(&kctl->jack_list);
+}
+static int snd_jack_new_kctl(struct snd_card *card, struct snd_jack +*jack, int type) {
- struct snd_kcontrol *kctl;
- int i, err, index, state = 0 /* use 0 for default state ?? */;
- INIT_LIST_HEAD(&jack->kctl_list);
- for (i = 0; i < fls(SND_JACK_BTN_0); i++) {
int testbit = 1 << i;if (type & testbit) {index = get_available_index(card,jack->id);kctl = snd_kctl_jack_new(jack->id, index, card);if (!kctl)return -ENOMEM;kctl->private_free = kctl_private_free;/* use jack_bit_idx for the kctl type bit */kctl->jack_bit_idx = i;This section above could do with some new lines to break the code into logical chunks.
[Keyon] OK.
err = snd_ctl_add(card, kctl);if (err < 0)return err;list_add_tail(&kctl->jack_list, &jack->kctl_list);/* set initial jack state */snd_kctl_jack_report(card, kctl, state & testbit);}- }
- return 0;
+}
/**
- snd_jack_new - Create a new jack
- @card: the card instance
@@ -138,7 +202,7 @@ int snd_jack_new(struct snd_card *card, const char
*id, int type,
}
jack->input_dev->phys = "ALSA";
jack->card = card; jack->type = type;
for (i = 0; i < SND_JACK_SWITCH_TYPES; i++) @@ -150,10 +214,17
@@
int snd_jack_new(struct snd_card *card, const char *id, int type, if (err < 0) goto fail_input;
/* register jack kcontrols */
err = snd_jack_new_kctl(card, jack, type);
if (err < 0)
goto fail_kctl;*jjack = jack;
return 0;
+fail_kctl:
- snd_device_free(card, jack);
fail_input: input_free_device(jack->input_dev); kfree(jack->id); @@ -230,6 +301,7 @@ EXPORT_SYMBOL(snd_jack_set_key); */ void snd_jack_report(struct snd_jack *jack, int status) {
struct snd_kcontrol *kctl; int i;
if (!jack)
@@ -245,13 +317,26 @@ void snd_jack_report(struct snd_jack *jack, int status)
for (i = 0; i < ARRAY_SIZE(jack_switch_types); i++) { int testbit = 1 << i;
if (jack->type & testbit)
if (jack->type & testbit) { input_report_switch(jack->input_dev, jack_switch_types[i], status & testbit);}}
input_sync(jack->input_dev);
for (i = 0; i < fls(SND_JACK_BTN_0); i++) {
int testbit = 1 << i;if (jack->type & testbit) {list_for_each_entry(kctl, &jack->kctl_list, jack_list) {if (kctl->jack_bit_idx == i) {snd_kctl_jack_report(jack->card, kctl,status &testbit);
}}}- }
} EXPORT_SYMBOL(snd_jack_report);
Liam
At Thu, 19 Mar 2015 16:40:18 +0800, Jie Yang wrote:
From: Liam Girdwood liam.r.girdwood@linux.intel.com
Currently the ALSA jack core registers only input devices for each jack registered. These jack input devices are not readable by userspace devices that run as non root.
This patch adds support for additionally registering jack kcontrol devices for every input jack registered. This allows non root userspace to read jack status.
Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com Modified-by: Jie Yang yang.jie@intel.com Signed-off-by: Jie Yang yang.jie@intel.com Reveiwed-by: Mark Brown broonie@kernel.org
include/sound/control.h | 2 ++ include/sound/jack.h | 2 ++ sound/core/jack.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++-- 3 files changed, 91 insertions(+), 2 deletions(-) mode change 100644 => 100755 sound/core/jack.c
diff --git a/include/sound/control.h b/include/sound/control.h index 75f3054..023b70a 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -66,6 +66,7 @@ struct snd_kcontrol_volatile {
struct snd_kcontrol { struct list_head list; /* list of controls */
- struct list_head jack_list; /* list of controls belong to the same jack*/ struct snd_ctl_elem_id id; unsigned int count; /* count of same elements */ snd_kcontrol_info_t *info;
@@ -75,6 +76,7 @@ struct snd_kcontrol { snd_kcontrol_tlv_rw_t *c; const unsigned int *p; } tlv;
- unsigned int jack_bit_idx; /*the corresponding jack type bit index */ unsigned long private_value; void *private_data; void (*private_free)(struct snd_kcontrol *kcontrol);
NAK for these additions. There must be a way to implement without such *generic* additions in kcontrol.
Takashi
At Thu, 19 Mar 2015 11:51:23 +0100, Takashi Iwai wrote:
At Thu, 19 Mar 2015 16:40:18 +0800, Jie Yang wrote:
From: Liam Girdwood liam.r.girdwood@linux.intel.com
Currently the ALSA jack core registers only input devices for each jack registered. These jack input devices are not readable by userspace devices that run as non root.
This patch adds support for additionally registering jack kcontrol devices for every input jack registered. This allows non root userspace to read jack status.
Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com Modified-by: Jie Yang yang.jie@intel.com Signed-off-by: Jie Yang yang.jie@intel.com Reveiwed-by: Mark Brown broonie@kernel.org
include/sound/control.h | 2 ++ include/sound/jack.h | 2 ++ sound/core/jack.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++-- 3 files changed, 91 insertions(+), 2 deletions(-) mode change 100644 => 100755 sound/core/jack.c
diff --git a/include/sound/control.h b/include/sound/control.h index 75f3054..023b70a 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -66,6 +66,7 @@ struct snd_kcontrol_volatile {
struct snd_kcontrol { struct list_head list; /* list of controls */
- struct list_head jack_list; /* list of controls belong to the same jack*/ struct snd_ctl_elem_id id; unsigned int count; /* count of same elements */ snd_kcontrol_info_t *info;
@@ -75,6 +76,7 @@ struct snd_kcontrol { snd_kcontrol_tlv_rw_t *c; const unsigned int *p; } tlv;
- unsigned int jack_bit_idx; /*the corresponding jack type bit index */ unsigned long private_value; void *private_data; void (*private_free)(struct snd_kcontrol *kcontrol);
NAK for these additions. There must be a way to implement without such *generic* additions in kcontrol.
IOW, you can allocate its own record in kctl->private_data. Currently hda_jack.c is the only user of snd_kctl_jack_*(). So, if we remove these callers, we can assign kctl->private_data for jack's own purpose. There you'll allocate own record for keeping tracking the list and bitmap, etc.
Takashi
-----Original Message----- From: Takashi Iwai [mailto:tiwai@suse.de] Sent: Thursday, March 19, 2015 6:51 PM To: Jie, Yang Cc: perex@perex.cz; broonie@kernel.org; alsa-devel@alsa-project.org; Girdwood, Liam R; Liam Girdwood Subject: Re: [PATCH] ALSA: jack: create jack kcontrols for every jack input device
At Thu, 19 Mar 2015 16:40:18 +0800, Jie Yang wrote:
From: Liam Girdwood liam.r.girdwood@linux.intel.com
Currently the ALSA jack core registers only input devices for each jack registered. These jack input devices are not readable by userspace devices that run as non root.
This patch adds support for additionally registering jack kcontrol devices for every input jack registered. This allows non root userspace to read jack status.
Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com Modified-by: Jie Yang yang.jie@intel.com Signed-off-by: Jie Yang yang.jie@intel.com Reveiwed-by: Mark Brown broonie@kernel.org
include/sound/control.h | 2 ++ include/sound/jack.h | 2 ++ sound/core/jack.c | 89
+++++++++++++++++++++++++++++++++++++++++++++++--
3 files changed, 91 insertions(+), 2 deletions(-) mode change 100644 => 100755 sound/core/jack.c
diff --git a/include/sound/control.h b/include/sound/control.h index 75f3054..023b70a 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -66,6 +66,7 @@ struct snd_kcontrol_volatile {
struct snd_kcontrol { struct list_head list; /* list of controls */
- struct list_head jack_list; /* list of controls belong to
the same jack*/
struct snd_ctl_elem_id id; unsigned int count; /* count of same elements */ snd_kcontrol_info_t *info; @@ -75,6 +76,7 @@ struct snd_kcontrol { snd_kcontrol_tlv_rw_t *c; const unsigned int *p; } tlv;
- unsigned int jack_bit_idx; /*the corresponding jack type bit
index */
unsigned long private_value; void *private_data; void (*private_free)(struct snd_kcontrol *kcontrol);
NAK for these additions. There must be a way to implement without such *generic* additions in kcontrol.
[Keyon] how about define another struct jack_kcontrol in jack.h like below?
struct jack_kcontrol { struct snd_kcontrol * kctl; struct list_head jack_list; /* list of controls belong to the same jack*/ unsigned int jack_bit_idx; /*the corresponding jack type bit index */ }
Takashi
At Thu, 19 Mar 2015 13:53:17 +0000, Jie, Yang wrote:
-----Original Message----- From: Takashi Iwai [mailto:tiwai@suse.de] Sent: Thursday, March 19, 2015 6:51 PM To: Jie, Yang Cc: perex@perex.cz; broonie@kernel.org; alsa-devel@alsa-project.org; Girdwood, Liam R; Liam Girdwood Subject: Re: [PATCH] ALSA: jack: create jack kcontrols for every jack input device
At Thu, 19 Mar 2015 16:40:18 +0800, Jie Yang wrote:
From: Liam Girdwood liam.r.girdwood@linux.intel.com
Currently the ALSA jack core registers only input devices for each jack registered. These jack input devices are not readable by userspace devices that run as non root.
This patch adds support for additionally registering jack kcontrol devices for every input jack registered. This allows non root userspace to read jack status.
Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com Modified-by: Jie Yang yang.jie@intel.com Signed-off-by: Jie Yang yang.jie@intel.com Reveiwed-by: Mark Brown broonie@kernel.org
include/sound/control.h | 2 ++ include/sound/jack.h | 2 ++ sound/core/jack.c | 89
+++++++++++++++++++++++++++++++++++++++++++++++--
3 files changed, 91 insertions(+), 2 deletions(-) mode change 100644 => 100755 sound/core/jack.c
diff --git a/include/sound/control.h b/include/sound/control.h index 75f3054..023b70a 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -66,6 +66,7 @@ struct snd_kcontrol_volatile {
struct snd_kcontrol { struct list_head list; /* list of controls */
- struct list_head jack_list; /* list of controls belong to
the same jack*/
struct snd_ctl_elem_id id; unsigned int count; /* count of same elements */ snd_kcontrol_info_t *info; @@ -75,6 +76,7 @@ struct snd_kcontrol { snd_kcontrol_tlv_rw_t *c; const unsigned int *p; } tlv;
- unsigned int jack_bit_idx; /*the corresponding jack type bit
index */
unsigned long private_value; void *private_data; void (*private_free)(struct snd_kcontrol *kcontrol);
NAK for these additions. There must be a way to implement without such *generic* additions in kcontrol.
[Keyon] how about define another struct jack_kcontrol in jack.h like below?
struct jack_kcontrol { struct snd_kcontrol * kctl; struct list_head jack_list; /* list of controls belong to the same jack*/ unsigned int jack_bit_idx; /*the corresponding jack type bit index */ }
Yes, and point it from kctl->private_data.
Takashi
-----Original Message----- From: Takashi Iwai [mailto:tiwai@suse.de] Sent: Thursday, March 19, 2015 10:02 PM To: Jie, Yang Cc: perex@perex.cz; broonie@kernel.org; alsa-devel@alsa-project.org; Girdwood, Liam R; Liam Girdwood Subject: Re: [PATCH] ALSA: jack: create jack kcontrols for every jack input device
At Thu, 19 Mar 2015 13:53:17 +0000, Jie, Yang wrote:
-----Original Message----- From: Takashi Iwai [mailto:tiwai@suse.de] Sent: Thursday, March 19, 2015 6:51 PM To: Jie, Yang Cc: perex@perex.cz; broonie@kernel.org; alsa-devel@alsa-project.org; Girdwood, Liam R; Liam Girdwood Subject: Re: [PATCH] ALSA: jack: create jack kcontrols for every jack input device
At Thu, 19 Mar 2015 16:40:18 +0800, Jie Yang wrote:
From: Liam Girdwood liam.r.girdwood@linux.intel.com
Currently the ALSA jack core registers only input devices for each jack registered. These jack input devices are not readable by userspace devices that run as non root.
This patch adds support for additionally registering jack kcontrol devices for every input jack registered. This allows non root userspace to read jack status.
Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com Modified-by: Jie Yang yang.jie@intel.com Signed-off-by: Jie Yang yang.jie@intel.com Reveiwed-by: Mark Brown broonie@kernel.org
include/sound/control.h | 2 ++ include/sound/jack.h | 2 ++ sound/core/jack.c | 89
+++++++++++++++++++++++++++++++++++++++++++++++--
3 files changed, 91 insertions(+), 2 deletions(-) mode change 100644 => 100755 sound/core/jack.c
diff --git a/include/sound/control.h b/include/sound/control.h index 75f3054..023b70a 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -66,6 +66,7 @@ struct snd_kcontrol_volatile {
struct snd_kcontrol { struct list_head list; /* list of controls */
- struct list_head jack_list; /* list of controls belong to
the same jack*/
struct snd_ctl_elem_id id; unsigned int count; /* count of same elements */ snd_kcontrol_info_t *info; @@ -75,6 +76,7 @@ struct snd_kcontrol { snd_kcontrol_tlv_rw_t *c; const unsigned int *p; } tlv;
- unsigned int jack_bit_idx; /*the corresponding jack type bit
index */
unsigned long private_value; void *private_data; void (*private_free)(struct snd_kcontrol *kcontrol);
NAK for these additions. There must be a way to implement without such *generic* additions in kcontrol.
[Keyon] how about define another struct jack_kcontrol in jack.h like below?
struct jack_kcontrol { struct snd_kcontrol * kctl; struct list_head jack_list; /* list of controls belong to the same jack*/ unsigned int jack_bit_idx; /*the corresponding jack type bit index */ }
Yes, and point it from kctl->private_data.
[Keyon] OK, will change like that in v2. Thanks.
Takashi
participants (5)
-
Jie Yang -
Jie, Yang
-
Liam Girdwood -
Liam Girdwood -
Takashi Iwai