1 files changed, 75 insertions, 0 deletions
diff --git a/kms/kms_shared.h b/kms/kms_shared.h
new file mode 100644
index 0000000..c982723
--- /dev/null
+++ b/kms/kms_shared.h
@@ -0,0 +1,75 @@
+#ifndef GSR_KMS_SHARED_H
+#define GSR_KMS_SHARED_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <drm_mode.h>
+
+#define GSR_KMS_PROTOCOL_VERSION 5
+
+#define GSR_KMS_MAX_ITEMS 8
+#define GSR_KMS_MAX_DMA_BUFS 4
+
+typedef struct gsr_kms_response_dma_buf gsr_kms_response_dma_buf;
+typedef struct gsr_kms_response_item gsr_kms_response_item;
+typedef struct gsr_kms_response gsr_kms_response;
+
+typedef enum {
+    KMS_REQUEST_TYPE_REPLACE_CONNECTION,
+    KMS_REQUEST_TYPE_GET_KMS
+} gsr_kms_request_type;
+
+typedef enum {
+    KMS_RESULT_OK,
+    KMS_RESULT_INVALID_REQUEST,
+    KMS_RESULT_FAILED_TO_GET_PLANE,
+    KMS_RESULT_FAILED_TO_GET_PLANES,
+    KMS_RESULT_FAILED_TO_SEND
+} gsr_kms_result;
+
+typedef struct {
+    uint32_t version; /* GSR_KMS_PROTOCOL_VERSION */
+    int type;         /* gsr_kms_request_type */
+    int new_connection_fd;
+} gsr_kms_request;
+
+struct gsr_kms_response_dma_buf {
+    int fd;
+    uint32_t pitch;
+    uint32_t offset;
+};
+
+typedef enum {
+    KMS_ROT_0,
+    KMS_ROT_90,
+    KMS_ROT_180,
+    KMS_ROT_270
+} gsr_kms_rotation;
+
+struct gsr_kms_response_item {
+    gsr_kms_response_dma_buf dma_buf[GSR_KMS_MAX_DMA_BUFS];
+    int num_dma_bufs;
+    uint32_t width;
+    uint32_t height;
+    uint32_t pixel_format;
+    uint64_t modifier;
+    uint32_t connector_id; /* 0 if unknown */
+    bool is_cursor;
+    bool has_hdr_metadata;
+    gsr_kms_rotation rotation;
+    int x;
+    int y;
+    int src_w;
+    int src_h;
+    struct hdr_output_metadata hdr_metadata;
+};
+
+struct gsr_kms_response {
+    uint32_t version; /* GSR_KMS_PROTOCOL_VERSION */
+    int result;       /* gsr_kms_result */
+    char err_msg[128];
+    gsr_kms_response_item items[GSR_KMS_MAX_ITEMS];
+    int num_items;
+};
+
+#endif /* #define GSR_KMS_SHARED_H */