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From 3dbffb783f44752ec221a2ee7a94a21934d681a2 Mon Sep 17 00:00:00 2001
From: Wataru Mizuno <wmizuno@jp.adit-jv.com>
Date: Tue, 10 Apr 2018 12:22:07 +0900
Subject: [PATCH 5/5] compositor-drm: introduce drm_get_dmafd_from_view
This API enables to get dmafd from weston_view
Signed-off-by: Wataru Mizuno <wmizuno@jp.adit-jv.com>
---
libweston/compositor-drm.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++
libweston/compositor-drm.h | 7 ++++
2 files changed, 87 insertions(+)
diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c
index 0b5b4c4..77f2ece 100644
--- a/libweston/compositor-drm.c
+++ b/libweston/compositor-drm.c
@@ -2430,6 +2430,85 @@ drm_output_set_seat(struct weston_output *base,
}
static int
+drm_get_dma_fd_from_view(struct weston_output *base,
+ struct weston_view *ev)
+{
+ struct drm_backend *b = to_drm_backend(base->compositor);
+ struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
+ struct gbm_bo *bo;
+ struct drm_fb *current;
+ struct linux_dmabuf_buffer *dmabuf;
+ uint32_t format;
+ int fd, ret;
+
+ if(!buffer) {
+ weston_log("buffer is NULL\n");
+ return -1;
+ }
+
+ if(dmabuf = linux_dmabuf_buffer_get(buffer->resource)) {
+ struct gbm_import_fd_data gbm_dmabuf = {
+ .fd = dmabuf->attributes.fd[0],
+ .width = dmabuf->attributes.width,
+ .height = dmabuf->attributes.height,
+ .stride = dmabuf->attributes.stride[0],
+ .format = dmabuf->attributes.format
+ };
+
+ bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_FD,
+ &gbm_dmabuf, GBM_BO_USE_SCANOUT);
+ if (!bo) {
+ weston_log("failed to get gbm_bo\n");
+ return -1;
+ }
+
+ current = zalloc(sizeof *current);
+ current->handle = gbm_bo_get_handle(bo).s32;
+ if (!current->handle) {
+ fprintf(stderr, "failed to get drm_handle\n");
+ return -1;
+ }
+ }
+ else if(ev->surface->buffer_ref.buffer->legacy_buffer) {
+ bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_WL_BUFFER,
+ buffer->resource, GBM_BO_USE_SCANOUT);
+
+ if (!bo) {
+ weston_log("failed to get gbm_bo\n");
+ return -1;
+ }
+
+ format = gbm_bo_get_format(bo);
+ if (!format) {
+ weston_log("failed to get format\n");
+ gbm_bo_destroy(bo);
+ return -1;
+ }
+
+ current = drm_fb_get_from_bo(bo, b, format);
+ if (!current) {
+ weston_log("failed to get drm_fb\n");
+ gbm_bo_destroy(bo);
+ return -1;
+ }
+ }
+ else {
+ weston_log("Buffer is not supported\n");
+ return -1;
+ }
+
+ ret = drmPrimeHandleToFD(b->drm.fd, current->handle,
+ DRM_CLOEXEC, &fd);
+ free(current);
+ if (ret) {
+ weston_log("failed to create prime fd for front buffer\n");
+ return -1;
+ }
+
+ return fd;
+}
+
+static int
drm_output_enable(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
@@ -3199,6 +3278,7 @@ static const struct weston_drm_output_api api = {
drm_output_set_mode,
drm_output_set_gbm_format,
drm_output_set_seat,
+ drm_get_dma_fd_from_view,
};
static struct drm_backend *
diff --git a/libweston/compositor-drm.h b/libweston/compositor-drm.h
index 2e2995a..fe00bd5 100644
--- a/libweston/compositor-drm.h
+++ b/libweston/compositor-drm.h
@@ -78,6 +78,13 @@ struct weston_drm_output_api {
*/
void (*set_seat)(struct weston_output *output,
const char *seat);
+
+ /** Get the dma fd from drm view.
+ *
+ * The dma fd is got from weston_view.
+ * Returns fd on success, -1 on failure.
+ */
+ int (*get_dma_fd_from_view)(struct weston_output *output, struct weston_view *view);
};
static inline const struct weston_drm_output_api *
--
2.7.4
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