drm/msm: add support for custom event notification
SDE hardware supports custom events which needs to be reported by driver
to user-space clients who request for notification. DRM framework
provides poll/read based interface to report the events to the
user-space clients. Change adds support to report msm driver events to
user-space clients.
Change-Id: I4ce75488ad1d1436cafb3451ebc7808961c6cab5
Signed-off-by: Gopikrishnaiah Anandan <agopik@codeaurora.org>
diff --git a/include/uapi/drm/msm_drm.h b/include/uapi/drm/msm_drm.h
index fb882f5..fda50e9 100644
--- a/include/uapi/drm/msm_drm.h
+++ b/include/uapi/drm/msm_drm.h
@@ -268,6 +268,39 @@
__u32 blackness_level;
};
+/**
+ * struct drm_msm_event_req - Payload to event enable/disable ioctls.
+ * @object_id: DRM object id. e.g.: for crtc pass crtc id.
+ * @object_type: DRM object type. e.g.: for crtc set it to DRM_MODE_OBJECT_CRTC.
+ * @event: Event for which notification is being enabled/disabled.
+ * e.g.: for Histogram set - DRM_EVENT_HISTOGRAM.
+ * @client_context: Opaque pointer that will be returned during event response
+ * notification.
+ * @index: Object index(e.g.: crtc index), optional for user-space to set.
+ * Driver will override value based on object_id and object_type.
+ */
+struct drm_msm_event_req {
+ __u32 object_id;
+ __u32 object_type;
+ __u32 event;
+ __u64 client_context;
+ __u32 index;
+};
+
+/**
+ * struct drm_msm_event_resp - payload returned when read is called for
+ * custom notifications.
+ * @base: Event type and length of complete notification payload.
+ * @info: Contains information about DRM that which raised this event.
+ * @data: Custom payload that driver returns for event type.
+ * size of data = base.length - (sizeof(base) + sizeof(info))
+ */
+struct drm_msm_event_resp {
+ struct drm_event base;
+ struct drm_msm_event_req info;
+ __u8 data[];
+};
+
#define DRM_MSM_GET_PARAM 0x00
/* placeholder:
#define DRM_MSM_SET_PARAM 0x01
@@ -284,6 +317,10 @@
#define DRM_MSM_REGISTER_EVENT 0x41
#define DRM_MSM_DEREGISTER_EVENT 0x42
+/* sde custom events */
+#define DRM_EVENT_HISTOGRAM 0x80000000
+#define DRM_EVENT_AD_BACKLIGHT 0x80000001
+
#define DRM_IOCTL_MSM_GET_PARAM DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GET_PARAM, struct drm_msm_param)
#define DRM_IOCTL_MSM_GEM_NEW DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_NEW, struct drm_msm_gem_new)
#define DRM_IOCTL_MSM_GEM_INFO DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_INFO, struct drm_msm_gem_info)
@@ -294,6 +331,10 @@
#define DRM_IOCTL_MSM_GEM_MADVISE DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_MADVISE, struct drm_msm_gem_madvise)
#define DRM_IOCTL_SDE_WB_CONFIG \
DRM_IOW((DRM_COMMAND_BASE + DRM_SDE_WB_CONFIG), struct sde_drm_wb_cfg)
+#define DRM_IOCTL_MSM_REGISTER_EVENT DRM_IOW((DRM_COMMAND_BASE + \
+ DRM_MSM_REGISTER_EVENT), struct drm_msm_event_req)
+#define DRM_IOCTL_MSM_DEREGISTER_EVENT DRM_IOW((DRM_COMMAND_BASE + \
+ DRM_MSM_DEREGISTER_EVENT), struct drm_msm_event_req)
#if defined(__cplusplus)
}