drm/msm: make HDCP support optional

It is already optional at runtime. But this at least simplifies
backports to kernels without QCOM_SCM.

Signed-off-by: Rob Clark <[e-mail]>

drivers/gpu/drm/msm/Kconfig

···
 	  that can be parsed by envytools demsm tool.  If enabled, register
 	  logging can be switched on via msm.reglog=y module param.
 
+config DRM_MSM_HDMI_HDCP
+	bool "Enable HDMI HDCP support in MSM DRM driver"
+	depends on DRM_MSM && QCOM_SCM
+	default y
+	help
+	  Choose this option to enable HDCP state machine
+
 config DRM_MSM_DSI
 	bool "Enable DSI support in MSM DRM driver"
 	depends on DRM_MSM

drivers/gpu/drm/msm/Makefile

···
 	hdmi/hdmi_audio.o \
 	hdmi/hdmi_bridge.o \
 	hdmi/hdmi_connector.o \
-	hdmi/hdmi_hdcp.o \
 	hdmi/hdmi_i2c.o \
 	hdmi/hdmi_phy.o \
 	hdmi/hdmi_phy_8960.o \
···
 msm-$(CONFIG_COMMON_CLK) += mdp/mdp4/mdp4_lvds_pll.o
 msm-$(CONFIG_COMMON_CLK) += hdmi/hdmi_pll_8960.o
 msm-$(CONFIG_COMMON_CLK) += hdmi/hdmi_phy_8996.o
+
+msm-$(CONFIG_DRM_MSM_HDMI_HDCP) += hdmi/hdmi_hdcp.o
 
 msm-$(CONFIG_DRM_MSM_DSI) += dsi/dsi.o \
 			mdp/mdp4/mdp4_dsi_encoder.o \

drivers/gpu/drm/msm/hdmi/hdmi.h

···
 /*
  * hdcp
  */
+#ifdef CONFIG_DRM_MSM_HDMI_HDCP
 struct hdmi_hdcp_ctrl *msm_hdmi_hdcp_init(struct hdmi *hdmi);
 void msm_hdmi_hdcp_destroy(struct hdmi *hdmi);
 void msm_hdmi_hdcp_on(struct hdmi_hdcp_ctrl *hdcp_ctrl);
 void msm_hdmi_hdcp_off(struct hdmi_hdcp_ctrl *hdcp_ctrl);
 void msm_hdmi_hdcp_irq(struct hdmi_hdcp_ctrl *hdcp_ctrl);
+#else
+static inline struct hdmi_hdcp_ctrl *msm_hdmi_hdcp_init(struct hdmi *hdmi)
+{
+	return ERR_PTR(-ENXIO);
+}
+static inline void msm_hdmi_hdcp_destroy(struct hdmi *hdmi) {}
+static inline void msm_hdmi_hdcp_on(struct hdmi_hdcp_ctrl *hdcp_ctrl) {}
+static inline void msm_hdmi_hdcp_off(struct hdmi_hdcp_ctrl *hdcp_ctrl) {}
+static inline void msm_hdmi_hdcp_irq(struct hdmi_hdcp_ctrl *hdcp_ctrl) {}
+#endif
 
 #endif /* __HDMI_CONNECTOR_H__ */