diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0400-staging-bcm2835-audio-Simplify-card-object-managemen.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0400-staging-bcm2835-audio-Simplify-card-object-managemen.patch | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0400-staging-bcm2835-audio-Simplify-card-object-managemen.patch b/target/linux/bcm27xx/patches-4.19/950-0400-staging-bcm2835-audio-Simplify-card-object-managemen.patch new file mode 100644 index 0000000000..523e54361d --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0400-staging-bcm2835-audio-Simplify-card-object-managemen.patch @@ -0,0 +1,212 @@ +From b19ed31a1ced7b6d4c4c04967a509d91a134e5bb Mon Sep 17 00:00:00 2001 +From: Takashi Iwai <tiwai@suse.de> +Date: Tue, 4 Sep 2018 17:58:58 +0200 +Subject: [PATCH] staging: bcm2835-audio: Simplify card object + management + +commit 872ae2d63d516a2a3b9c833d8685afcfa7814542 upstream. + +Instead of creating a dummy child device to manage the card object, +just use devm stuff directly for releasing with snd_card_free(). +This results in a lot of code reduction. + +Since the dummy child devices are gone, the device object to be passed +to the memory allocator needs to be adjusted as well. + +Signed-off-by: Takashi Iwai <tiwai@suse.de> +Tested-by: Stefan Wahren <stefan.wahren@i2se.com> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + .../vc04_services/bcm2835-audio/bcm2835-pcm.c | 2 +- + .../vc04_services/bcm2835-audio/bcm2835.c | 120 +++++------------- + 2 files changed, 33 insertions(+), 89 deletions(-) + +--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c ++++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c +@@ -349,7 +349,7 @@ int snd_bcm2835_new_pcm(struct bcm2835_c + &snd_bcm2835_playback_ops); + + snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, +- chip->card->dev->parent, 128 * 1024, 128 * 1024); ++ chip->card->dev, 128 * 1024, 128 * 1024); + + if (spdif) + chip->pcm_spdif = pcm; +--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c ++++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c +@@ -22,38 +22,6 @@ module_param(enable_compat_alsa, bool, 0 + MODULE_PARM_DESC(enable_compat_alsa, + "Enables ALSA compatibility virtual audio device"); + +-static void snd_devm_unregister_child(struct device *dev, void *res) +-{ +- struct device *childdev = *(struct device **)res; +- struct bcm2835_chip *chip = dev_get_drvdata(childdev); +- struct snd_card *card = chip->card; +- +- snd_card_free(card); +- +- device_unregister(childdev); +-} +- +-static int snd_devm_add_child(struct device *dev, struct device *child) +-{ +- struct device **dr; +- int ret; +- +- dr = devres_alloc(snd_devm_unregister_child, sizeof(*dr), GFP_KERNEL); +- if (!dr) +- return -ENOMEM; +- +- ret = device_add(child); +- if (ret) { +- devres_free(dr); +- return ret; +- } +- +- *dr = child; +- devres_add(dev, dr); +- +- return 0; +-} +- + static void bcm2835_devm_free_vchi_ctx(struct device *dev, void *res) + { + struct bcm2835_vchi_ctx *vchi_ctx = res; +@@ -84,36 +52,6 @@ static int bcm2835_devm_add_vchi_ctx(str + return 0; + } + +-static void snd_bcm2835_release(struct device *dev) +-{ +-} +- +-static struct device * +-snd_create_device(struct device *parent, +- struct device_driver *driver, +- const char *name) +-{ +- struct device *device; +- int ret; +- +- device = devm_kzalloc(parent, sizeof(*device), GFP_KERNEL); +- if (!device) +- return ERR_PTR(-ENOMEM); +- +- device_initialize(device); +- device->parent = parent; +- device->driver = driver; +- device->release = snd_bcm2835_release; +- +- dev_set_name(device, "%s", name); +- +- ret = snd_devm_add_child(parent, device); +- if (ret) +- return ERR_PTR(ret); +- +- return device; +-} +- + typedef int (*bcm2835_audio_newpcm_func)(struct bcm2835_chip *chip, + const char *name, + enum snd_bcm2835_route route, +@@ -216,40 +154,36 @@ static struct bcm2835_audio_drivers chil + }, + }; + +-static int snd_add_child_device(struct device *device, ++static void bcm2835_card_free(void *data) ++{ ++ snd_card_free(data); ++} ++ ++static int snd_add_child_device(struct device *dev, + struct bcm2835_audio_driver *audio_driver, + u32 numchans) + { + struct snd_card *card; +- struct device *child; + struct bcm2835_chip *chip; + int err; + +- child = snd_create_device(device, &audio_driver->driver, +- audio_driver->driver.name); +- if (IS_ERR(child)) { +- dev_err(device, +- "Unable to create child device %p, error %ld", +- audio_driver->driver.name, +- PTR_ERR(child)); +- return PTR_ERR(child); +- } +- +- err = snd_card_new(child, -1, NULL, THIS_MODULE, sizeof(*chip), &card); ++ err = snd_card_new(dev, -1, NULL, THIS_MODULE, sizeof(*chip), &card); + if (err < 0) { +- dev_err(child, "Failed to create card"); ++ dev_err(dev, "Failed to create card"); + return err; + } + + chip = card->private_data; + chip->card = card; +- chip->dev = child; ++ chip->dev = dev; + mutex_init(&chip->audio_mutex); + +- chip->vchi_ctx = devres_find(device, ++ chip->vchi_ctx = devres_find(dev, + bcm2835_devm_free_vchi_ctx, NULL, NULL); +- if (!chip->vchi_ctx) +- return -ENODEV; ++ if (!chip->vchi_ctx) { ++ err = -ENODEV; ++ goto error; ++ } + + strcpy(card->driver, audio_driver->driver.name); + strcpy(card->shortname, audio_driver->shortname); +@@ -259,26 +193,36 @@ static int snd_add_child_device(struct d + audio_driver->route, + numchans); + if (err) { +- dev_err(child, "Failed to create pcm, error %d\n", err); +- return err; ++ dev_err(dev, "Failed to create pcm, error %d\n", err); ++ goto error; + } + + err = audio_driver->newctl(chip); + if (err) { +- dev_err(child, "Failed to create controls, error %d\n", err); +- return err; ++ dev_err(dev, "Failed to create controls, error %d\n", err); ++ goto error; + } + + err = snd_card_register(card); + if (err) { +- dev_err(child, "Failed to register card, error %d\n", err); +- return err; ++ dev_err(dev, "Failed to register card, error %d\n", err); ++ goto error; + } + +- dev_set_drvdata(child, chip); +- dev_info(child, "card created with %d channels\n", numchans); ++ dev_set_drvdata(dev, chip); + ++ err = devm_add_action(dev, bcm2835_card_free, card); ++ if (err < 0) { ++ dev_err(dev, "Failed to add devm action, err %d\n", err); ++ goto error; ++ } ++ ++ dev_info(dev, "card created with %d channels\n", numchans); + return 0; ++ ++ error: ++ snd_card_free(card); ++ return err; + } + + static int snd_add_child_devices(struct device *device, u32 numchans) |