drm/atomic: refactor hwdec_drmprime_drm with native resources

That new API was introduced and allows to have several native resources.
Thisuses that mechanisma for drm resources rather than the deprecated
opengl-cb structs.

This patch therefore add two structs that can be used with the drm atomic interop.
 - mpv_opengl_drm_params : which will hold all the drm handles
 - mpv_opengl_drm_osd_size : which will hold osd layer size

This commit adds a drm-osd-size=WxH parameter to commandline which
allows to define the OSD plane dimension. OSD can be upscaled to
screen resolution when having OSD at video resolution is too heavy.

This is especially useful for UHD modes on embedded devices where
the GPU cannot handle UHD modes at a decent framerate.

2 files changed, 43 insertions, 0 deletions

diff --git a/libmpv/render.h b/libmpv/render.h
index 5a39d4e1c6..253b2b43f9 100644
--- a/libmpv/render.h
+++ b/libmpv/render.h
@@ -276,6 +276,18 @@ typedef enum mpv_render_param_type {
      * in the same way.
      */
     MPV_RENDER_PARAM_SKIP_RENDERING = 13,
+    /**
+     * DRM display, contains drm display handles.
+     * Valid for mpv_render_context_create().
+     * Type : struct mpv_opengl_drm_params*
+     */
+    MPV_RENDER_PARAM_DRM_DISPLAY = 14,
+    /**
+     * DRM osd size, contains osd dimensions.
+     * Valid for mpv_render_context_create().
+     * Type : struct mpv_opengl_drm_osd_size*
+     */
+    MPV_RENDER_PARAM_DRM_OSD_SIZE = 15,
 } mpv_render_param_type;
 
 /**
diff --git a/libmpv/render_gl.h b/libmpv/render_gl.h
index a4872a066b..574be86ffd 100644
--- a/libmpv/render_gl.h
+++ b/libmpv/render_gl.h
@@ -147,6 +147,37 @@ typedef struct mpv_opengl_fbo {
     int internal_format;
 } mpv_opengl_fbo;
 
+typedef struct mpv_opengl_drm_params {
+    /**
+     * DRM fd (int). set this to -1 if invalid.
+     */
+    int fd;
+
+    /**
+     * Currently used crtc id
+     */
+    int crtc_id;
+
+    /**
+     * Currently used connector id
+     */
+    int connector_id;
+
+    /**
+     * Pointer to a drmModeAtomicReq pointer that is being used for the renderloop.
+     * This pointer should hold a pointer to the atomic request pointer
+     * The atomic request pointer is usually changed at every renderloop.
+     */
+    struct _drmModeAtomicReq **atomic_request_ptr;
+} mpv_opengl_drm_params;
+
+typedef struct mpv_opengl_drm_osd_size {
+    /**
+     * size of the OSD in pixels.
+     */
+    int width, height;
+} mpv_opengl_drm_osd_size;
+
 #ifdef __cplusplus
 }
 #endif