drivers/gpu/drm/i915/display/intel_connector.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/i915/display/intel_connector.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/i915/display/intel_connector.c
Extension
.c
Size
9856 bytes
Lines
341
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <linux/i2c.h>
#include <linux/slab.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>

#include "intel_connector.h"
#include "intel_display_core.h"
#include "intel_display_debugfs.h"
#include "intel_display_types.h"
#include "intel_hdcp.h"
#include "intel_panel.h"

static void intel_connector_modeset_retry_work_fn(struct work_struct *work)
{
	struct intel_connector *connector = container_of(work, typeof(*connector),
							 modeset_retry_work);
	struct intel_display *display = to_intel_display(connector);

	drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s]\n", connector->base.base.id,
		    connector->base.name);

	/* Grab the locks before changing connector property*/
	mutex_lock(&display->drm->mode_config.mutex);
	/* Set connector link status to BAD and send a Uevent to notify
	 * userspace to do a modeset.
	 */
	drm_connector_set_link_status_property(&connector->base,
					       DRM_MODE_LINK_STATUS_BAD);
	mutex_unlock(&display->drm->mode_config.mutex);
	/* Send Hotplug uevent so userspace can reprobe */
	drm_kms_helper_connector_hotplug_event(&connector->base);

	drm_connector_put(&connector->base);
}

void intel_connector_queue_modeset_retry_work(struct intel_connector *connector)
{
	struct intel_display *display = to_intel_display(connector);

	drm_connector_get(&connector->base);
	if (!queue_work(display->wq.unordered, &connector->modeset_retry_work))
		drm_connector_put(&connector->base);
}

void intel_connector_cancel_modeset_retry_work(struct intel_connector *connector)
{
	if (cancel_work_sync(&connector->modeset_retry_work))
		drm_connector_put(&connector->base);
}

static int intel_connector_init(struct intel_connector *connector)
{
	struct intel_digital_connector_state *conn_state;

	/*
	 * Allocate enough memory to hold intel_digital_connector_state,
	 * This might be a few bytes too many, but for connectors that don't
	 * need it we'll free the state and allocate a smaller one on the first
	 * successful commit anyway.
	 */
	conn_state = kzalloc_obj(*conn_state);
	if (!conn_state)
		return -ENOMEM;

	__drm_atomic_helper_connector_reset(&connector->base,
					    &conn_state->base);

	intel_panel_init_alloc(connector);

	INIT_WORK(&connector->modeset_retry_work,
		  intel_connector_modeset_retry_work_fn);

	return 0;
}

struct intel_connector *intel_connector_alloc(void)
{
	struct intel_connector *connector;

	connector = kzalloc_obj(*connector);
	if (!connector)
		return NULL;

	if (intel_connector_init(connector) < 0) {
		kfree(connector);
		return NULL;
	}

Annotation

Implementation Notes