drivers/gpu/drm/vboxvideo/vbox_irq.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/vboxvideo/vbox_irq.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/vboxvideo/vbox_irq.c
Extension
.c
Size
5303 bytes
Lines
193
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

if (hintsi->enabled && hintsj->enabled) {
				if (hintsi->dx >= 0xffff ||
				    hintsi->dy >= 0xffff ||
				    hintsj->dx >= 0xffff ||
				    hintsj->dy >= 0xffff ||
				    (hintsi->dx <
					hintsj->dx + (hintsj->cx & 0x8fff) &&
				     hintsi->dx + (hintsi->cx & 0x8fff) >
					hintsj->dx) ||
				    (hintsi->dy <
					hintsj->dy + (hintsj->cy & 0x8fff) &&
				     hintsi->dy + (hintsi->cy & 0x8fff) >
					hintsj->dy))
					valid = false;
			}
		}
	}
	if (!valid)
		for (i = 0; i < vbox->num_crtcs; ++i) {
			if (vbox->last_mode_hints[i].enabled) {
				vbox->last_mode_hints[i].dx = currentx;
				vbox->last_mode_hints[i].dy = 0;
				currentx +=
				    vbox->last_mode_hints[i].cx & 0x8fff;
			}
		}
}

/* Query the host for the most recent video mode hints. */
static void vbox_update_mode_hints(struct vbox_private *vbox)
{
	struct drm_connector_list_iter conn_iter;
	struct drm_device *dev = &vbox->ddev;
	struct drm_connector *connector;
	struct vbox_connector *vbox_conn;
	struct vbva_modehint *hints;
	u16 flags;
	bool disconnected;
	unsigned int crtc_id;
	int ret;

	ret = hgsmi_get_mode_hints(vbox->guest_pool, vbox->num_crtcs,
				   vbox->last_mode_hints);
	if (ret) {
		DRM_ERROR("vboxvideo: hgsmi_get_mode_hints failed: %d\n", ret);
		return;
	}

	validate_or_set_position_hints(vbox);

	drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
	drm_connector_list_iter_begin(dev, &conn_iter);
	drm_for_each_connector_iter(connector, &conn_iter) {
		vbox_conn = to_vbox_connector(connector);

		hints = &vbox->last_mode_hints[vbox_conn->vbox_crtc->crtc_id];
		if (hints->magic != VBVAMODEHINT_MAGIC)
			continue;

		disconnected = !(hints->enabled);
		crtc_id = vbox_conn->vbox_crtc->crtc_id;
		vbox_conn->mode_hint.width = hints->cx;
		vbox_conn->mode_hint.height = hints->cy;
		vbox_conn->vbox_crtc->x_hint = hints->dx;
		vbox_conn->vbox_crtc->y_hint = hints->dy;
		vbox_conn->mode_hint.disconnected = disconnected;

		if (vbox_conn->vbox_crtc->disconnected == disconnected)
			continue;

		if (disconnected)
			flags = VBVA_SCREEN_F_ACTIVE | VBVA_SCREEN_F_DISABLED;
		else
			flags = VBVA_SCREEN_F_ACTIVE | VBVA_SCREEN_F_BLANK;

		hgsmi_process_display_info(vbox->guest_pool, crtc_id, 0, 0, 0,
					   hints->cx * 4, hints->cx,
					   hints->cy, 0, flags);

		vbox_conn->vbox_crtc->disconnected = disconnected;
	}
	drm_connector_list_iter_end(&conn_iter);
	drm_modeset_unlock(&dev->mode_config.connection_mutex);
}

static void vbox_hotplug_worker(struct work_struct *work)
{
	struct vbox_private *vbox = container_of(work, struct vbox_private,
						 hotplug_work);

Annotation

Implementation Notes