vmwgfx_stdu.c

	.destroy = vmw_stdu_crtc_destroy,
	.set_config = vmw_stdu_crtc_set_config,
	.page_flip = vmw_stdu_crtc_page_flip,
};



/******************************************************************************
 * Screen Target Display Unit Encoder Functions
 *****************************************************************************/

/**
 * vmw_stdu_encoder_destroy - cleans up the STDU
 *
 * @encoder: used the get the containing STDU
 *
 * vmwgfx cleans up crtc/encoder/connector all at the same time so technically
 * this can be a no-op.  Nevertheless, it doesn't hurt of have this in case
 * the common KMS code changes and somehow vmw_stdu_crtc_destroy() doesn't
 * get called.
 */
static void vmw_stdu_encoder_destroy(struct drm_encoder *encoder)
{
	vmw_stdu_destroy(vmw_encoder_to_stdu(encoder));
}

static const struct drm_encoder_funcs vmw_stdu_encoder_funcs = {
	.destroy = vmw_stdu_encoder_destroy,
};



/******************************************************************************
 * Screen Target Display Unit Connector Functions
 *****************************************************************************/

/**
 * vmw_stdu_connector_destroy - cleans up the STDU
 *
 * @connector: used to get the containing STDU
 *
 * vmwgfx cleans up crtc/encoder/connector all at the same time so technically
 * this can be a no-op.  Nevertheless, it doesn't hurt of have this in case
 * the common KMS code changes and somehow vmw_stdu_crtc_destroy() doesn't
 * get called.
 */
static void vmw_stdu_connector_destroy(struct drm_connector *connector)
{
	vmw_stdu_destroy(vmw_connector_to_stdu(connector));
}



static const struct drm_connector_funcs vmw_stdu_connector_funcs = {
	.dpms = vmw_du_connector_dpms,
	.detect = vmw_du_connector_detect,
	.fill_modes = vmw_du_connector_fill_modes,
	.set_property = vmw_du_connector_set_property,
	.destroy = vmw_stdu_connector_destroy,
};



/**
 * vmw_stdu_init - Sets up a Screen Target Display Unit
 *
 * @dev_priv: VMW DRM device
 * @unit: unit number range from 0 to VMWGFX_NUM_DISPLAY_UNITS
 *
 * This function is called once per CRTC, and allocates one Screen Target
 * display unit to represent that CRTC.  Since the SVGA device does not separate
 * out encoder and connector, they are represented as part of the STDU as well.
 */
static int vmw_stdu_init(struct vmw_private *dev_priv, unsigned unit)
{
	struct vmw_screen_target_display_unit *stdu;
	struct drm_device *dev = dev_priv->dev;
	struct drm_connector *connector;
	struct drm_encoder *encoder;
	struct drm_crtc *crtc;


	stdu = kzalloc(sizeof(*stdu), GFP_KERNEL);
	if (!stdu)
		return -ENOMEM;

	stdu->base.unit = unit;
	crtc = &stdu->base.crtc;
	encoder = &stdu->base.encoder;
	connector = &stdu->base.connector;

	stdu->base.pref_active = (unit == 0);
	stdu->base.pref_width  = dev_priv->initial_width;
	stdu->base.pref_height = dev_priv->initial_height;
	stdu->base.is_implicit = true;

	drm_connector_init(dev, connector, &vmw_stdu_connector_funcs,
			   DRM_MODE_CONNECTOR_VIRTUAL);
	connector->status = vmw_du_connector_detect(connector, false);

	drm_encoder_init(dev, encoder, &vmw_stdu_encoder_funcs,
			 DRM_MODE_ENCODER_VIRTUAL, NULL);
	drm_mode_connector_attach_encoder(connector, encoder);
	encoder->possible_crtcs = (1 << unit);
	encoder->possible_clones = 0;

	(void) drm_connector_register(connector);

	drm_crtc_init(dev, crtc, &vmw_stdu_crtc_funcs);

	drm_mode_crtc_set_gamma_size(crtc, 256);

	drm_object_attach_property(&connector->base,
				   dev->mode_config.dirty_info_property,
				   1);

	return 0;
}



/**
 *  vmw_stdu_destroy - Cleans up a vmw_screen_target_display_unit
 *
 *  @stdu:  Screen Target Display Unit to be destroyed
 *
 *  Clean up after vmw_stdu_init
 */
static void vmw_stdu_destroy(struct vmw_screen_target_display_unit *stdu)
{
	vmw_stdu_unpin_display(stdu);

	vmw_du_cleanup(&stdu->base);
	kfree(stdu);
}



/******************************************************************************
 * Screen Target Display KMS Functions
 *
 * These functions are called by the common KMS code in vmwgfx_kms.c
 *****************************************************************************/

/**
 * vmw_kms_stdu_init_display - Initializes a Screen Target based display
 *
 * @dev_priv: VMW DRM device
 *
 * This function initialize a Screen Target based display device.  It checks
 * the capability bits to make sure the underlying hardware can support
 * screen targets, and then creates the maximum number of CRTCs, a.k.a Display
 * Units, as supported by the display hardware.
 *
 * RETURNS:
 * 0 on success, error code otherwise
 */
int vmw_kms_stdu_init_display(struct vmw_private *dev_priv)
{
	struct drm_device *dev = dev_priv->dev;
	int i, ret;


	/* Do nothing if Screen Target support is turned off */
	if (!VMWGFX_ENABLE_SCREEN_TARGET_OTABLE)
		return -ENOSYS;

	if (!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS))
		return -ENOSYS;

	ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
	if (unlikely(ret != 0))
		return ret;

	ret = drm_mode_create_dirty_info_property(dev);
	if (unlikely(ret != 0))
		goto err_vblank_cleanup;

	dev_priv->active_display_unit = vmw_du_screen_target;

	for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i) {
		ret = vmw_stdu_init(dev_priv, i);

		if (unlikely(ret != 0)) {
			DRM_ERROR("Failed to initialize STDU %d", i);
			goto err_vblank_cleanup;
		}
	}

	DRM_INFO("Screen Target Display device initialized\n");

	return 0;

err_vblank_cleanup:
	drm_vblank_cleanup(dev);
	return ret;
}



/**
 * vmw_kms_stdu_close_display - Cleans up after vmw_kms_stdu_init_display
 *
 * @dev_priv: VMW DRM device
 *
 * Frees up any resources allocated by vmw_kms_stdu_init_display
 *
 * RETURNS:
 * 0 on success
 */
int vmw_kms_stdu_close_display(struct vmw_private *dev_priv)
{
	struct drm_device *dev = dev_priv->dev;

	drm_vblank_cleanup(dev);

	return 0;
}