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misc/mei/hdcp: Component framework for I915 Interface
Mei hdcp driver is designed as component slave for the I915 component master. v2: Rebased. v3: Notifier chain is adopted for cldev state update [Tomas] v4: Made static dummy functions as inline in mei_hdcp.h API for polling client device status IS_ENABLED used in header, for config status for mei_hdcp. v5: Replacing the notifier with component framework. [Daniel] v6: Rebased on the I915 comp master redesign. v7: mei_hdcp_component_registered is made static [Uma] Need for global static variable mei_cldev is removed. v8: master comp is added to be matched with i915 subcomponent [daniel] v9: only comp_master is set and retrieved as driver_data [Daniel] Reviewed-by Daniel. v10: small corrections at probe [Tomas] v11: bind and unbind logs are made as debug logs [Tomas] cldev_enable failure is handled [Tomas] Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1550772730-23280-16-git-send-email-ramalingam.c@intel.com
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@ -23,6 +23,7 @@
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#include <linux/slab.h>
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#include <linux/uuid.h>
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#include <linux/mei_cl_bus.h>
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#include <linux/component.h>
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#include <drm/drm_connector.h>
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#include <drm/i915_component.h>
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#include <drm/i915_mei_hdcp_interface.h>
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@ -711,8 +712,7 @@ mei_hdcp_close_session(struct device *dev, struct hdcp_port_data *data)
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return 0;
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}
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static const __attribute__((unused))
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struct i915_hdcp_component_ops mei_hdcp_ops = {
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static const struct i915_hdcp_component_ops mei_hdcp_ops = {
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.owner = THIS_MODULE,
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.initiate_hdcp2_session = mei_hdcp_initiate_session,
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.verify_receiver_cert_prepare_km =
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@ -729,20 +729,100 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
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.close_hdcp_session = mei_hdcp_close_session,
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};
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static int mei_component_master_bind(struct device *dev)
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{
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struct mei_cl_device *cldev = to_mei_cl_device(dev);
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struct i915_hdcp_comp_master *comp_master =
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mei_cldev_get_drvdata(cldev);
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int ret;
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dev_dbg(dev, "%s\n", __func__);
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comp_master->ops = &mei_hdcp_ops;
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comp_master->mei_dev = dev;
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ret = component_bind_all(dev, comp_master);
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if (ret < 0)
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return ret;
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return 0;
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}
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static void mei_component_master_unbind(struct device *dev)
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{
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struct mei_cl_device *cldev = to_mei_cl_device(dev);
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struct i915_hdcp_comp_master *comp_master =
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mei_cldev_get_drvdata(cldev);
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dev_dbg(dev, "%s\n", __func__);
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component_unbind_all(dev, comp_master);
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}
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static const struct component_master_ops mei_component_master_ops = {
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.bind = mei_component_master_bind,
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.unbind = mei_component_master_unbind,
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};
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static int mei_hdcp_component_match(struct device *dev, int subcomponent,
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void *data)
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{
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return !strcmp(dev->driver->name, "i915") &&
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subcomponent == I915_COMPONENT_HDCP;
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}
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static int mei_hdcp_probe(struct mei_cl_device *cldev,
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const struct mei_cl_device_id *id)
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{
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struct i915_hdcp_comp_master *comp_master;
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struct component_match *master_match;
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int ret;
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ret = mei_cldev_enable(cldev);
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if (ret < 0)
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if (ret < 0) {
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dev_err(&cldev->dev, "mei_cldev_enable Failed. %d\n", ret);
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goto enable_err_exit;
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}
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comp_master = kzalloc(sizeof(*comp_master), GFP_KERNEL);
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if (!comp_master) {
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ret = -ENOMEM;
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goto err_exit;
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}
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master_match = NULL;
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component_match_add_typed(&cldev->dev, &master_match,
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mei_hdcp_component_match, comp_master);
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if (IS_ERR_OR_NULL(master_match)) {
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ret = -ENOMEM;
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goto err_exit;
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}
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mei_cldev_set_drvdata(cldev, comp_master);
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ret = component_master_add_with_match(&cldev->dev,
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&mei_component_master_ops,
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master_match);
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if (ret < 0) {
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dev_err(&cldev->dev, "Master comp add failed %d\n", ret);
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goto err_exit;
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}
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return 0;
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err_exit:
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mei_cldev_set_drvdata(cldev, NULL);
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kfree(comp_master);
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mei_cldev_disable(cldev);
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enable_err_exit:
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return ret;
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}
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static int mei_hdcp_remove(struct mei_cl_device *cldev)
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{
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struct i915_hdcp_comp_master *comp_master =
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mei_cldev_get_drvdata(cldev);
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component_master_del(&cldev->dev, &mei_component_master_ops);
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kfree(comp_master);
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mei_cldev_set_drvdata(cldev, NULL);
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return mei_cldev_disable(cldev);
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}
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