dm_helpers_dp_read_dpcd identifier - Linux source code next-20260811

Projects

linux

Versions

FIXME
- FIXME
  - next-20260811

Defined in 1 files as a prototype:

drivers/gpu/drm/amd/display/dc/dm_helpers.h, line 135 (as a prototype)

Defined in 1 files as a function:

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c, line 659 (as a function)

Referenced in 7 files:

Smatch caller information:

drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dpcd.c internal_link_read_dpcd() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	0	ctx->dc->current_state->bw_ctx.dml.vba.DPPCLKUsingSingleDPPChroma	-inf-1.797693e+308
PARAM_VALUE	0	ctx->dc->current_state->bw_ctx.dml.vba.DPPCLKUsingSingleDPPLuma	-inf-1.797693e+308
PARAM_VALUE	0	ctx->dc->dml.vba.DPPCLKUsingSingleDPPChroma	-inf-1.797693e+308
PARAM_VALUE	0	ctx->dc->dml.vba.DPPCLKUsingSingleDPPLuma	-inf-1.797693e+308
PARAM_VALUE	1	link	4096-ptr_max
PARAM_VALUE	1	link->aux_access_disabled	0
PARAM_VALUE	1	link->ctx->dc->current_state->bw_ctx.dml.vba.DPPCLKUsingSingleDPPChroma	-inf-1.797693e+308
PARAM_VALUE	1	link->ctx->dc->current_state->bw_ctx.dml.vba.DPPCLKUsingSingleDPPLuma	-inf-1.797693e+308
PARAM_VALUE	1	link->ctx->dc->dml.vba.DPPCLKUsingSingleDPPChroma	-inf-1.797693e+308
PARAM_VALUE	1	link->ctx->dc->dml.vba.DPPCLKUsingSingleDPPLuma	-inf-1.797693e+308
PARAM_VALUE	1	link->link_enc->funcs->is_dig_enabled	0,835999835047198720,2505374968371208192,3400303375799660544,6908382666642669568
PARAM_VALUE	1	link->panel_cntl->funcs	4096-ptr_max
PARAM_VALUE	1	*link->dc->current_state->res_ctx.hpo_dp_link_enc_to_link_idx	0-4294967295
PARAM_VALUE	1	*link->dpcd_caps.edp_supported_link_rates	0-4294967295
PARAM_VALUE	3	data	4096-ptr_max
CAPPED_DATA	2	address	1
DATA_SOURCE	1	link	$0
DATA_SOURCE	2	address	$1
DATA_SOURCE	3	data	$2
DATA_SOURCE	4	size	$3
RX_PATH
TASK_NOT_RUNNING
HOST_DATA	1	link->panel_cntl->stored_backlight_registers.BL_PWM_CNTL	0-u32max
HOST_DATA	1	link->panel_cntl->stored_backlight_registers.BL_PWM_CNTL2	0-u32max
HOST_DATA	1	link->panel_cntl->stored_backlight_registers.BL_PWM_PERIOD_CNTL	0-u32max
NO_OVERFLOW_SIMPLE	2	address
NO_OVERFLOW_SIMPLE	4	size
HALF_LOCKED2		&aconnector->hpd_lock

drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_edp_panel_control.c edp_setup_psr() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	1	link	4096-ptr_max
PARAM_VALUE	1	link->connector_signal	128
PARAM_VALUE	1	link->dc	4096-ptr_max
PARAM_VALUE	1	link->dc->link_srv	4096-ptr_max
PARAM_VALUE	1	link->dc->link_srv->edp_set_backlight_level	4096-ptr_max
PARAM_VALUE	1	link->panel_config.psr.read_psrcap_again	1
PARAM_VALUE	2	address	112
PARAM_VALUE	3	data	4096-ptr_max
PARAM_VALUE	4	size	1
DATA_SOURCE	1	link	$0
NOCHECK_CALL
UNITS	4	size	unit_byte

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c dm_test_dp_read_dpcd_null_priv() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	0	ctx	0
PARAM_VALUE	1	link	16,4096-ptr_max
PARAM_VALUE	2	address	0
PARAM_VALUE	3	data	3129961958239612928
PARAM_VALUE	3	*data	0
PARAM_VALUE	4	size	1
BUF_SIZE	1	link	1616
DATA_SOURCE	1	link	r kunit_kzalloc
MEM_ZERO	1	link
UNITS	4	size	unit_byte

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c dm_test_dp_read_dpcd_success() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	0	ctx	0
PARAM_VALUE	2	address	0
PARAM_VALUE	3	data	7257981424751599616
PARAM_VALUE	3	*data	0
PARAM_VALUE	4	size	1
DATA_SOURCE	1	link	r dm_test_dpcd_link
UNITS	4	size	unit_byte

drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_irq_handler.c handle_hpd_irq_psr_sink() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	0	ctx	4096-ptr_max
PARAM_VALUE	0	ctx->logger	4096-ptr_max
PARAM_VALUE	1	link	4096-ptr_max
PARAM_VALUE	1	link->ctx	4096-ptr_max
PARAM_VALUE	1	link->ctx->logger	4096-ptr_max
PARAM_VALUE	1	link->dc	4096-ptr_max
PARAM_VALUE	1	link->dc->link_srv	4096-ptr_max
PARAM_VALUE	1	link->psr_settings.psr_feature_enabled	1
PARAM_VALUE	2	address	368
PARAM_VALUE	3	*data	0
PARAM_VALUE	4	size	1
CAPPED_DATA	1	link	1
DATA_SOURCE	1	link	$0
RX_PATH
TASK_NOT_RUNNING
NOCHECK_CALL
UNITS	4	size	unit_byte
LOCK2		&aconnector->hpd_lock
HALF_LOCKED2		&adev->dm.irq_handler_list_table_lock
HALF_LOCKED2		&pool->lock
HALF_LOCKED2		irq_table_flags
TYPE_LOCK		(struct amdgpu_dm_connector)->hpd_lock

drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_irq_handler.c handle_hpd_irq_psr_sink() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	0	ctx	4096-ptr_max
PARAM_VALUE	0	ctx->logger	4096-ptr_max
PARAM_VALUE	1	link	4096-ptr_max
PARAM_VALUE	1	link->ctx	4096-ptr_max
PARAM_VALUE	1	link->ctx->logger	4096-ptr_max
PARAM_VALUE	1	link->dc	4096-ptr_max
PARAM_VALUE	1	link->dc->link_srv	4096-ptr_max
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex.dep_map->name	0-255
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex.first_waiter->list.prev->next	5159360019465732096
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex.first_waiter->list.prev->prev	5159360019465732096
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex.first_waiter->task->blocked_lock.dep_map->name	0-255
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex.first_waiter->task->blocked_lock.owner	(-1)
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex.first_waiter->task->blocked_lock.owner_cpu	4294967295
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex.first_waiter->task->usage.refs.counter	s32min-s32max
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex.osq.tail.counter	s32min-s32max
PARAM_VALUE	1	link->psr_settings.psr_feature_enabled	1
PARAM_VALUE	2	address	8198
PARAM_VALUE	3	data	4096-ptr_max
PARAM_VALUE	4	size	3
BUF_SIZE	3	data	3
CAPPED_DATA	1	link	1
DATA_SOURCE	1	link	$0
RX_PATH
TASK_NOT_RUNNING
NOCHECK_CALL
UNITS	4	size	unit_byte
LOCK2		&aconnector->hpd_lock
HALF_LOCKED2		&adev->dm.irq_handler_list_table_lock
HALF_LOCKED2		&pool->lock
HALF_LOCKED2		irq_table_flags
TYPE_LOCK		(struct amdgpu_dm_connector)->hpd_lock

drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_irq_handler.c handle_hpd_irq_replay_sink() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	0	ctx	4096-ptr_max
PARAM_VALUE	0	ctx->logger	4096-ptr_max
PARAM_VALUE	1	link	4096-ptr_max
PARAM_VALUE	1	link->ctx	4096-ptr_max
PARAM_VALUE	1	link->ctx->logger	4096-ptr_max
PARAM_VALUE	1	link->dc	4096-ptr_max
PARAM_VALUE	1	link->dc->link_srv	4096-ptr_max
PARAM_VALUE	1	link->replay_settings.replay_feature_enabled	1
PARAM_VALUE	2	address	888
PARAM_VALUE	4	size	1
DATA_SOURCE	1	link	$0
RX_PATH
TASK_NOT_RUNNING
UNITS	4	size	unit_byte
LOCK2		&aconnector->hpd_lock
HALF_LOCKED2		&adev->dm.irq_handler_list_table_lock
HALF_LOCKED2		&pool->lock
HALF_LOCKED2		irq_table_flags
TYPE_LOCK		(struct amdgpu_dm_connector)->hpd_lock

drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_irq_handler.c handle_hpd_irq_replay_sink() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	0	ctx	4096-ptr_max
PARAM_VALUE	0	ctx->logger	4096-ptr_max
PARAM_VALUE	1	link	4096-ptr_max
PARAM_VALUE	1	link->ctx	4096-ptr_max
PARAM_VALUE	1	link->ctx->logger	4096-ptr_max
PARAM_VALUE	1	link->dc	4096-ptr_max
PARAM_VALUE	1	link->dc->link_srv	4096-ptr_max
PARAM_VALUE	1	link->replay_settings.replay_feature_enabled	1
PARAM_VALUE	2	address	8198
PARAM_VALUE	3	*data	0
PARAM_VALUE	4	size	1
DATA_SOURCE	1	link	$0
RX_PATH
TASK_NOT_RUNNING
NOCHECK_CALL
UNITS	4	size	unit_byte
LOCK2		&aconnector->hpd_lock
HALF_LOCKED2		&adev->dm.irq_handler_list_table_lock
HALF_LOCKED2		&pool->lock
HALF_LOCKED2		irq_table_flags
TYPE_LOCK		(struct amdgpu_dm_connector)->hpd_lock

drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_irq_handler.c handle_hpd_irq_replay_sink() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	0	ctx	4096-ptr_max
PARAM_VALUE	0	ctx->logger	4096-ptr_max
PARAM_VALUE	1	link	4096-ptr_max
PARAM_VALUE	1	link->ctx	4096-ptr_max
PARAM_VALUE	1	link->ctx->logger	4096-ptr_max
PARAM_VALUE	1	link->dc	4096-ptr_max
PARAM_VALUE	1	link->dc->link_srv	4096-ptr_max
PARAM_VALUE	1	link->replay_settings.replay_feature_enabled	1
PARAM_VALUE	2	address	8226
PARAM_VALUE	3	*data	0
PARAM_VALUE	4	size	1
DATA_SOURCE	1	link	$0
RX_PATH
TASK_NOT_RUNNING
NOCHECK_CALL
LOCK2		&aconnector->hpd_lock
HALF_LOCKED2		&adev->dm.irq_handler_list_table_lock
HALF_LOCKED2		&pool->lock
HALF_LOCKED2		irq_table_flags
TYPE_LOCK		(struct amdgpu_dm_connector)->hpd_lock

drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_irq_handler.c handle_hpd_irq_vesa_replay_sink() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	0	ctx	4096-ptr_max
PARAM_VALUE	0	ctx->logger	4096-ptr_max
PARAM_VALUE	1	link	4096-ptr_max
PARAM_VALUE	1	link->ctx	4096-ptr_max
PARAM_VALUE	1	link->ctx->logger	4096-ptr_max
PARAM_VALUE	1	link->dc	4096-ptr_max
PARAM_VALUE	1	link->dc->link_srv	4096-ptr_max
PARAM_VALUE	1	link->replay_settings.config.replay_version	1
PARAM_VALUE	1	link->replay_settings.replay_feature_enabled	1
PARAM_VALUE	2	address	8224
PARAM_VALUE	3	*data	0
PARAM_VALUE	4	size	1
DATA_SOURCE	1	link	$0
RX_PATH
TASK_NOT_RUNNING
NOCHECK_CALL
UNITS	4	size	unit_byte
LOCK2		&aconnector->hpd_lock
HALF_LOCKED2		&adev->dm.irq_handler_list_table_lock
HALF_LOCKED2		&pool->lock
HALF_LOCKED2		irq_table_flags
TYPE_LOCK		(struct amdgpu_dm_connector)->hpd_lock

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_debugfs.c edp_ilr_show() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	1	link	4096-ptr_max
PARAM_VALUE	2	address	16
PARAM_VALUE	3	data	5693001334071291904
PARAM_VALUE	4	size	16
BUF_SIZE	3	data	16
RX_PATH
TASK_NOT_RUNNING
NOCHECK_CALL
UNITS	4	size	unit_byte
LOCK2		&m->lock
TYPE_LOCK		(struct seq_file)->lock

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_debugfs.c edp_ilr_write() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	1	link	4096-ptr_max
PARAM_VALUE	2	address	16
PARAM_VALUE	3	data	4096-ptr_max
PARAM_VALUE	4	size	16
BUF_SIZE	3	data	16
UNITS	4	size	unit_byte

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_hdcp.c lp_read_dpcd() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	1	link	4096-ptr_max
PARAM_VALUE	3	data	4096-ptr_max
PARAM_VALUE	4	size	1-16
BUF_SIZE	3	data	(-1),4
BUF_SIZE	3	data	(-1),4
CAPPED_DATA	4	size	1
DATA_SOURCE	1	link	$0
DATA_SOURCE	2	address	$1
DATA_SOURCE	3	data	$2
DATA_SOURCE	4	size	$3
FUZZY_MAX	4	size	16
RX_PATH
UNITS	4	size	unit_byte
HALF_LOCKED2		_T->lock

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_helpers.c dm_helpers_mst_enable_stream_features() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	1	link	4096-ptr_max
PARAM_VALUE	1	link->aux_access_disabled	0
PARAM_VALUE	2	address	263
PARAM_VALUE	4	size	1
BUF_SIZE	1	link	(-1),1616
BUF_SIZE	1	link	(-1),1616
UNITS	4	size	unit_byte

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_helpers.c dm_helpers_read_local_edid() -> dm_helpers_dp_read_dpcd()

Type	Parameter	Key	Value
PARAM_VALUE	0	ctx	4096-ptr_max
PARAM_VALUE	1	link	4096-ptr_max
PARAM_VALUE	1	link->aux_mode	1
PARAM_VALUE	1	link->connector_signal	1-2,4,8,32,128
PARAM_VALUE	1	link->ctx	4096-ptr_max
PARAM_VALUE	1	link->dc	4096-ptr_max
PARAM_VALUE	1	link->dc->link_srv	4096-ptr_max
PARAM_VALUE	1	link->ddc->ddc_pin->pin_clock->mode	s32min-s32max
PARAM_VALUE	1	link->ddc->ddc_pin->pin_clock->pin	0-s64max
PARAM_VALUE	1	link->ddc->ddc_pin->pin_data->mode	s32min-s32max
PARAM_VALUE	1	link->ddc->ddc_pin->pin_data->pin	0-s64max
PARAM_VALUE	1	link->ddc->link->priv->i2c->base.dev.driver_data->adev->pm.bus_locked	0-1
PARAM_VALUE	1	link->ddc->transaction_type	0-2
PARAM_VALUE	1	link->hpd_status	0
PARAM_VALUE	1	link->local_sink	4096-ptr_max
PARAM_VALUE	1	link->local_sink->dc_container_id	0
PARAM_VALUE	1	link->local_sink->dongle_max_pix_clk	0
PARAM_VALUE	1	link->local_sink->link	4096-ptr_max
PARAM_VALUE	1	link->local_sink->refcount.refcount.refs.counter	1
PARAM_VALUE	1	link->local_sink->sink_signal	1-2,4,8,128,512
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex->first_waiter->task->blocked_lock.owner	(-4611686018427387904)-4611686018427387903
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex->wait_lock.owner	(-4611686018427387904)-4611686018427387903
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex.first_waiter->list.prev->next	5159360019465732096
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex.first_waiter->task->blocked_lock.owner	(-1)
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex.first_waiter->task->blocked_lock.owner_cpu	4294967295
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex.first_waiter->task->usage.refs.counter	s32min-s32max
PARAM_VALUE	1	link->priv->dm_dp_aux.aux.hw_mutex.osq.tail.counter	0-s32max
PARAM_VALUE	1	link->type	0
PARAM_VALUE	2	address	536
PARAM_VALUE	3	*data	0
PARAM_VALUE	4	size	1
BUF_SIZE	1	link	(-1),1616
BUF_SIZE	1	link	(-1),1616
BUF_SIZE	1	link->local_sink	2520
DATA_SOURCE	0	ctx	$0
DATA_SOURCE	1	link	$1
RX_PATH
TASK_NOT_RUNNING
NOCHECK_CALL
UNITS	4	size	unit_byte
HALF_LOCKED2		&aconnector->hpd_lock
HALF_LOCKED2		_T->lock