greybus-dev February 2026

greybus-dev@lists.linaro.org

22 participants
41 discussions

[PATCH] staging: greybus: camera: add comment for mutex

by Jose A. Perez de Azpillaga

Add a comment to the mutex definition in struct gb_camera to describe what it protects, satisfying a checkpatch.pl CHECK. Signed-off-by: Jose A. Perez de Azpillaga <azpijr(a)gmail.com> --- Hi, I noticed a CHECK for alignment in this file on line 267. However, fixing it pushed the line over 100 characters. I felt that adding extreme indentation might add more noise than value, so I've only included the mutex comment fix here. I'd appreciate your guidance on whether you prefer strict alignment even if it breaks the 100-column rule in these specific cases. --- drivers/staging/greybus/camera.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/greybus/camera.c b/drivers/staging/greybus/camera.c index 62b55bb28408..a6f3637b8871 100644 --- a/drivers/staging/greybus/camera.c +++ b/drivers/staging/greybus/camera.c @@ -53,7 +53,7 @@ struct gb_camera { struct gb_connection *data_connection; u16 data_cport_id; - struct mutex mutex; + struct mutex mutex; /* Protects camera state */ enum gb_camera_state state; struct { -- 2.53.0

4 weeks

[PATCH] staging: greybus: move topology allocation to codec probe

by Jose A. Perez de Azpillaga

The FIXME in gb_audio_probe noted that memory allocation for the topology should happen within the codec driver rather than the greybus helper. Move the size-check and kzalloc from audio_gb.c to audio_module.c and update the function signature of gb_audio_gb_get_topology to accept the pointer. This clarifies ownership of the allocated memory. Signed-off-by: Jose A. Perez de Azpillaga <azpijr(a)gmail.com> --- drivers/staging/greybus/audio_gb.c | 33 +++----------------------- drivers/staging/greybus/audio_module.c | 29 ++++++++++++++++++---- 2 files changed, 27 insertions(+), 35 deletions(-) diff --git a/drivers/staging/greybus/audio_gb.c b/drivers/staging/greybus/audio_gb.c index 9d8994fdb41a..4037b3bf1e9f 100644 --- a/drivers/staging/greybus/audio_gb.c +++ b/drivers/staging/greybus/audio_gb.c @@ -8,38 +8,11 @@ #include <linux/greybus.h> #include "audio_codec.h" -/* TODO: Split into separate calls */ int gb_audio_gb_get_topology(struct gb_connection *connection, - struct gb_audio_topology **topology) + struct gb_audio_topology *topology) { - struct gb_audio_get_topology_size_response size_resp; - struct gb_audio_topology *topo; - u16 size; - int ret; - - ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY_SIZE, - NULL, 0, &size_resp, sizeof(size_resp)); - if (ret) - return ret; - - size = le16_to_cpu(size_resp.size); - if (size < sizeof(*topo)) - return -ENODATA; - - topo = kzalloc(size, GFP_KERNEL); - if (!topo) - return -ENOMEM; - - ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY, NULL, 0, - topo, size); - if (ret) { - kfree(topo); - return ret; - } - - *topology = topo; - - return 0; + return gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY, + NULL, 0, topology, le16_to_cpu(topology->size)); } EXPORT_SYMBOL_GPL(gb_audio_gb_get_topology); diff --git a/drivers/staging/greybus/audio_module.c b/drivers/staging/greybus/audio_module.c index 12c376c477b3..8efb720c3f30 100644 --- a/drivers/staging/greybus/audio_module.c +++ b/drivers/staging/greybus/audio_module.c @@ -240,6 +240,8 @@ static int gb_audio_probe(struct gb_bundle *bundle, struct gbaudio_data_connection *dai, *_dai; int ret, i; struct gb_audio_topology *topology; + struct gb_audio_get_topology_size_response size_resp; + u16 size; /* There should be at least one Management and one Data cport */ if (bundle->num_cports < 2) @@ -304,13 +306,30 @@ static int gb_audio_probe(struct gb_bundle *bundle, } gbmodule->dev_id = gbmodule->mgmt_connection->intf->interface_id; - /* - * FIXME: malloc for topology happens via audio_gb driver - * should be done within codec driver itself - */ - ret = gb_audio_gb_get_topology(gbmodule->mgmt_connection, &topology); + ret = gb_operation_sync(gbmodule->mgmt_connection, + GB_AUDIO_TYPE_GET_TOPOLOGY_SIZE, NULL, 0, + &size_resp, sizeof(size_resp)); + if (ret) + goto disable_connection; + + size = le16_to_cpu(size_resp.size); + if (size < sizeof(*topology)) { + ret = -ENODATA; + goto disable_connection; + } + + topology = kzalloc(size, GFP_KERNEL); + if (!topology) { + ret = -ENOMEM; + goto disable_connection; + } + + topology->size = cpu_to_le16(size); + + ret = gb_audio_gb_get_topology(gbmodule->mgmt_connection, topology); if (ret) { dev_err(dev, "%d:Error while fetching topology\n", ret); + kfree(topology); goto disable_connection; } -- 2.53.0

4 weeks

[PATCH v4] staging: greybus: audio: Use sysfs_emit in show functions

by Shubham Chakraborty

Refactor sprintf to sysfs_emit in all show functions of the greybus audio manager module. This follows the standard kernel practice of using sysfs_emit for sysfs attributes. Signed-off-by: Shubham Chakraborty <chakrabortyshubham66(a)gmail.com> --- v4: - Remove \n additions, keep format strings identical to originals. v3: - Add patch history below the --- line as requested by Greg KH. v2: - Add missing Signed-off-by line. - Wrap commit message at 72 characters. --- drivers/staging/greybus/audio_manager_module.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/staging/greybus/audio_manager_module.c b/drivers/staging/greybus/audio_manager_module.c index e87b82ca6..f9dd9269c 100644 --- a/drivers/staging/greybus/audio_manager_module.c +++ b/drivers/staging/greybus/audio_manager_module.c @@ -76,7 +76,7 @@ static void gb_audio_module_release(struct kobject *kobj) static ssize_t gb_audio_module_name_show(struct gb_audio_manager_module *module, struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%s", module->desc.name); + return sysfs_emit(buf, "%s", module->desc.name); } static struct gb_audio_manager_module_attribute gb_audio_module_name_attribute = @@ -85,7 +85,7 @@ static struct gb_audio_manager_module_attribute gb_audio_module_name_attribute = static ssize_t gb_audio_module_vid_show(struct gb_audio_manager_module *module, struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%d", module->desc.vid); + return sysfs_emit(buf, "%d", module->desc.vid); } static struct gb_audio_manager_module_attribute gb_audio_module_vid_attribute = @@ -94,7 +94,7 @@ static struct gb_audio_manager_module_attribute gb_audio_module_vid_attribute = static ssize_t gb_audio_module_pid_show(struct gb_audio_manager_module *module, struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%d", module->desc.pid); + return sysfs_emit(buf, "%d", module->desc.pid); } static struct gb_audio_manager_module_attribute gb_audio_module_pid_attribute = @@ -104,7 +104,7 @@ static ssize_t gb_audio_module_intf_id_show(struct gb_audio_manager_module *modu struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%d", module->desc.intf_id); + return sysfs_emit(buf, "%d", module->desc.intf_id); } static struct gb_audio_manager_module_attribute @@ -115,7 +115,7 @@ static ssize_t gb_audio_module_ip_devices_show(struct gb_audio_manager_module *m struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "0x%X", module->desc.ip_devices); + return sysfs_emit(buf, "0x%X", module->desc.ip_devices); } static struct gb_audio_manager_module_attribute @@ -126,7 +126,7 @@ static ssize_t gb_audio_module_op_devices_show(struct gb_audio_manager_module *m struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "0x%X", module->desc.op_devices); + return sysfs_emit(buf, "0x%X", module->desc.op_devices); } static struct gb_audio_manager_module_attribute -- 2.53.0

4 weeks

[PATCH v3] staging: greybus: audio: Use sysfs_emit in show functions

by Shubham Chakraborty

Refactor sprintf to sysfs_emit in all show functions of the greybus audio manager module. This follows the standard kernel practice of using sysfs_emit for sysfs attributes, ensuring consistent output formatting and newline handling. Signed-off-by: Shubham Chakraborty <chakrabortyshubham66(a)gmail.com> --- v3: - Add patch history below the --- line as requested by Greg KH. v2: - Add missing Signed-off-by line. - Wrap commit message at 72 characters. drivers/staging/greybus/audio_manager_module.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/staging/greybus/audio_manager_module.c b/drivers/staging/greybus/audio_manager_module.c index e87b82ca6..f22ee73eb 100644 --- a/drivers/staging/greybus/audio_manager_module.c +++ b/drivers/staging/greybus/audio_manager_module.c @@ -76,7 +76,7 @@ static void gb_audio_module_release(struct kobject *kobj) static ssize_t gb_audio_module_name_show(struct gb_audio_manager_module *module, struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%s", module->desc.name); + return sysfs_emit(buf, "%s\n", module->desc.name); } static struct gb_audio_manager_module_attribute gb_audio_module_name_attribute = @@ -85,7 +85,7 @@ static struct gb_audio_manager_module_attribute gb_audio_module_name_attribute = static ssize_t gb_audio_module_vid_show(struct gb_audio_manager_module *module, struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%d", module->desc.vid); + return sysfs_emit(buf, "%d\n", module->desc.vid); } static struct gb_audio_manager_module_attribute gb_audio_module_vid_attribute = @@ -94,7 +94,7 @@ static struct gb_audio_manager_module_attribute gb_audio_module_vid_attribute = static ssize_t gb_audio_module_pid_show(struct gb_audio_manager_module *module, struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%d", module->desc.pid); + return sysfs_emit(buf, "%d\n", module->desc.pid); } static struct gb_audio_manager_module_attribute gb_audio_module_pid_attribute = @@ -104,7 +104,7 @@ static ssize_t gb_audio_module_intf_id_show(struct gb_audio_manager_module *modu struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%d", module->desc.intf_id); + return sysfs_emit(buf, "%d\n", module->desc.intf_id); } static struct gb_audio_manager_module_attribute @@ -115,7 +115,7 @@ static ssize_t gb_audio_module_ip_devices_show(struct gb_audio_manager_module *m struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "0x%X", module->desc.ip_devices); + return sysfs_emit(buf, "0x%X\n", module->desc.ip_devices); } static struct gb_audio_manager_module_attribute @@ -126,7 +126,7 @@ static ssize_t gb_audio_module_op_devices_show(struct gb_audio_manager_module *m struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "0x%X", module->desc.op_devices); + return sysfs_emit(buf, "0x%X\n", module->desc.op_devices); } static struct gb_audio_manager_module_attribute -- 2.53.0

4 weeks

[PATCH v2] staging: greybus: audio: Use sysfs_emit in show functions

by Shubham Chakraborty

Refactor sprintf to sysfs_emit in all show functions of the greybus audio manager module. This follows the standard kernel practice of using sysfs_emit for sysfs attributes, ensuring consistent output formatting and newline handling. Signed-off-by: Shubham Chakraborty <chakrabortyshubham66(a)gmail.com> --- drivers/staging/greybus/audio_manager_module.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/staging/greybus/audio_manager_module.c b/drivers/staging/greybus/audio_manager_module.c index e87b82ca6..f22ee73eb 100644 --- a/drivers/staging/greybus/audio_manager_module.c +++ b/drivers/staging/greybus/audio_manager_module.c @@ -76,7 +76,7 @@ static void gb_audio_module_release(struct kobject *kobj) static ssize_t gb_audio_module_name_show(struct gb_audio_manager_module *module, struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%s", module->desc.name); + return sysfs_emit(buf, "%s\n", module->desc.name); } static struct gb_audio_manager_module_attribute gb_audio_module_name_attribute = @@ -85,7 +85,7 @@ static struct gb_audio_manager_module_attribute gb_audio_module_name_attribute = static ssize_t gb_audio_module_vid_show(struct gb_audio_manager_module *module, struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%d", module->desc.vid); + return sysfs_emit(buf, "%d\n", module->desc.vid); } static struct gb_audio_manager_module_attribute gb_audio_module_vid_attribute = @@ -94,7 +94,7 @@ static struct gb_audio_manager_module_attribute gb_audio_module_vid_attribute = static ssize_t gb_audio_module_pid_show(struct gb_audio_manager_module *module, struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%d", module->desc.pid); + return sysfs_emit(buf, "%d\n", module->desc.pid); } static struct gb_audio_manager_module_attribute gb_audio_module_pid_attribute = @@ -104,7 +104,7 @@ static ssize_t gb_audio_module_intf_id_show(struct gb_audio_manager_module *modu struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%d", module->desc.intf_id); + return sysfs_emit(buf, "%d\n", module->desc.intf_id); } static struct gb_audio_manager_module_attribute @@ -115,7 +115,7 @@ static ssize_t gb_audio_module_ip_devices_show(struct gb_audio_manager_module *m struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "0x%X", module->desc.ip_devices); + return sysfs_emit(buf, "0x%X\n", module->desc.ip_devices); } static struct gb_audio_manager_module_attribute @@ -126,7 +126,7 @@ static ssize_t gb_audio_module_op_devices_show(struct gb_audio_manager_module *m struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "0x%X", module->desc.op_devices); + return sysfs_emit(buf, "0x%X\n", module->desc.op_devices); } static struct gb_audio_manager_module_attribute -- 2.53.0

4 weeks, 1 day

[PATCH] staging: greybus: audio: Use sysfs_emit in show functions

by Shubham Chakraborty

Refactor sprintf to sysfs_emit in all show functions of the greybus audio manager module. This follows the standard kernel practice of using sysfs_emit for sysfs attributes, ensuring consistent output formatting and newline handling. --- drivers/staging/greybus/audio_manager_module.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/staging/greybus/audio_manager_module.c b/drivers/staging/greybus/audio_manager_module.c index e87b82ca6..f22ee73eb 100644 --- a/drivers/staging/greybus/audio_manager_module.c +++ b/drivers/staging/greybus/audio_manager_module.c @@ -76,7 +76,7 @@ static void gb_audio_module_release(struct kobject *kobj) static ssize_t gb_audio_module_name_show(struct gb_audio_manager_module *module, struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%s", module->desc.name); + return sysfs_emit(buf, "%s\n", module->desc.name); } static struct gb_audio_manager_module_attribute gb_audio_module_name_attribute = @@ -85,7 +85,7 @@ static struct gb_audio_manager_module_attribute gb_audio_module_name_attribute = static ssize_t gb_audio_module_vid_show(struct gb_audio_manager_module *module, struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%d", module->desc.vid); + return sysfs_emit(buf, "%d\n", module->desc.vid); } static struct gb_audio_manager_module_attribute gb_audio_module_vid_attribute = @@ -94,7 +94,7 @@ static struct gb_audio_manager_module_attribute gb_audio_module_vid_attribute = static ssize_t gb_audio_module_pid_show(struct gb_audio_manager_module *module, struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%d", module->desc.pid); + return sysfs_emit(buf, "%d\n", module->desc.pid); } static struct gb_audio_manager_module_attribute gb_audio_module_pid_attribute = @@ -104,7 +104,7 @@ static ssize_t gb_audio_module_intf_id_show(struct gb_audio_manager_module *modu struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "%d", module->desc.intf_id); + return sysfs_emit(buf, "%d\n", module->desc.intf_id); } static struct gb_audio_manager_module_attribute @@ -115,7 +115,7 @@ static ssize_t gb_audio_module_ip_devices_show(struct gb_audio_manager_module *m struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "0x%X", module->desc.ip_devices); + return sysfs_emit(buf, "0x%X\n", module->desc.ip_devices); } static struct gb_audio_manager_module_attribute @@ -126,7 +126,7 @@ static ssize_t gb_audio_module_op_devices_show(struct gb_audio_manager_module *m struct gb_audio_manager_module_attribute *attr, char *buf) { - return sprintf(buf, "0x%X", module->desc.op_devices); + return sysfs_emit(buf, "0x%X\n", module->desc.op_devices); } static struct gb_audio_manager_module_attribute -- 2.53.0

4 weeks, 1 day

[PATCH] staging: greybus: remove unused apb_ctrl_fw_flashing() and apb_ctrl_standby_boot()

by Bruno Martins

These functions were left behind when commit 921dbe52b40b ("greybus: arche-platform: Add support for SPI bus sharing for Mihi") removed their only callers in 2016. Signed-off-by: Bruno Martins <ehanoc(a)protonmail.com> --- drivers/staging/greybus/arche-apb-ctrl.c | 10 ---------- drivers/staging/greybus/arche_platform.h | 2 -- 2 files changed, 12 deletions(-) diff --git a/drivers/staging/greybus/arche-apb-ctrl.c b/drivers/staging/greybus/arche-apb-ctrl.c index 90ab32638d3f..6a50b79bb787 100644 --- a/drivers/staging/greybus/arche-apb-ctrl.c +++ b/drivers/staging/greybus/arche-apb-ctrl.c @@ -230,16 +230,6 @@ int apb_ctrl_coldboot(struct device *dev) return coldboot_seq(to_platform_device(dev)); } -int apb_ctrl_fw_flashing(struct device *dev) -{ - return fw_flashing_seq(to_platform_device(dev)); -} - -int apb_ctrl_standby_boot(struct device *dev) -{ - return standby_boot_seq(to_platform_device(dev)); -} - void apb_ctrl_poweroff(struct device *dev) { poweroff_seq(to_platform_device(dev)); diff --git a/drivers/staging/greybus/arche_platform.h b/drivers/staging/greybus/arche_platform.h index 9d997f2d6517..5d0692af2533 100644 --- a/drivers/staging/greybus/arche_platform.h +++ b/drivers/staging/greybus/arche_platform.h @@ -21,8 +21,6 @@ void __exit arche_apb_exit(void); /* Operational states for the APB device */ int apb_ctrl_coldboot(struct device *dev); -int apb_ctrl_fw_flashing(struct device *dev); -int apb_ctrl_standby_boot(struct device *dev); void apb_ctrl_poweroff(struct device *dev); #endif /* __ARCHE_PLATFORM_H */ -- 2.47.3

4 weeks, 1 day

[PATCH v2 0/2] staging: greybus: audio: small fixes

by Hardik Phalet

Changes in v2: - Resent using git-send-email (previous submission had incorrect formatting). - No code changes. This series contains two small fixes for the Greybus audio manager: 1) Fix a NULL dereference in gb_audio_manager_get_module(). 2) Drop a stale TODO in the module release callback. Both are correctness / cleanup fixes with no functional change beyond preventing crashes. Thanks, Hardik Hardik Phalet (2): staging: greybus: audio: fix NULL dereference in gb_audio_manager_get_module() staging: greybus: audio: drop stale TODO in module release drivers/staging/greybus/audio_manager.c | 3 ++- drivers/staging/greybus/audio_manager_module.c | 1 - 2 files changed, 2 insertions(+), 2 deletions(-) -- 2.53.0

4 weeks, 1 day

[PATCH v3 2/4] staging: greybus: fixed styling issue in fw-management.c

by Rachit Dhar

Fixed a styling issue highlighted by checkpatch.pl. Signed-off-by: Rachit Dhar <rchtdhr(a)gmail.com> --- drivers/staging/greybus/fw-management.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/staging/greybus/fw-management.c b/drivers/staging/greybus/fw-management.c index 07a0e6b63cf3..cf917ddb79c4 100644 --- a/drivers/staging/greybus/fw-management.c +++ b/drivers/staging/greybus/fw-management.c @@ -434,7 +434,8 @@ static int fw_mgmt_ioctl(struct fw_mgmt *fw_mgmt, unsigned int cmd, return -EFAULT; ret = fw_mgmt_load_and_validate_operation(fw_mgmt, - intf_load.load_method, intf_load.firmware_tag); + intf_load.load_method, + intf_load.firmware_tag); if (ret) return ret; -- 2.43.0

1 month

[PATCH] staging: greybus: Fix spelling mistake in Kconfig

by tomasz.unger＠yahoo.pl

From: Tomasz Unger <tomasz.unger(a)yahoo.pl> Replace 'busses' with 'buses' in help text. Found using codespell. Signed-off-by: Tomasz Unger <tomasz.unger(a)yahoo.pl> --- drivers/staging/greybus/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/greybus/Kconfig b/drivers/staging/greybus/Kconfig index 1e745a8d439c..7635f3e850fa 100644 --- a/drivers/staging/greybus/Kconfig +++ b/drivers/staging/greybus/Kconfig @@ -123,7 +123,7 @@ menuconfig GREYBUS_BRIDGED_PHY help Select this option to pick from a variety of Greybus Bridged PHY class drivers. These drivers emulate a number of - different "traditional" busses by tunneling them over Greybus. + different "traditional" buses by tunneling them over Greybus. Examples of this include serial, SPI, USB, and others. To compile this code as a module, chose M here: the module -- 2.53.0

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greybus-dev February 2026