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From 6bed527fe0a4101ef214abaf2cd82609b6c510e4 Mon Sep 17 00:00:00 2001
From: Veeresh Kadasani <external.vkadasani@jp.adit-jv.com>
Date: Tue, 30 Jul 2019 20:25:34 +0900
Subject: [PATCH 2/2] compositor-drm: introduce drm_get_dmafd_from_view
This API enables to get dmafd from weston_view
Signed-off-by: Veeresh Kadasani <external.vkadasani@jp.adit-jv.com>
---
libweston/compositor-drm.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++
libweston/compositor-drm.h | 7 ++++++
2 files changed, 65 insertions(+)
diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c
index b83459a..5cabfb5 100644
--- a/libweston/compositor-drm.c
+++ b/libweston/compositor-drm.c
@@ -5849,6 +5849,64 @@ drm_output_set_seat(struct weston_output *base,
}
static int
+drm_get_dma_fd_from_view(struct weston_output *base,
+ struct weston_view *ev, int *buf_stride)
+{
+ 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;
+ bool is_opaque = drm_view_is_opaque(ev);
+ uint32_t format;
+ int fd, ret;
+
+ if(!buffer) {
+ weston_log("buffer is NULL\n");
+ return -1;
+ }
+
+ if(dmabuf = linux_dmabuf_buffer_get(buffer->resource)) {
+ current = drm_fb_get_from_dmabuf(dmabuf, b, is_opaque);
+ if (!current)
+ {
+ fprintf(stderr, "failed to get drm_fb from dmabuf\n");
+ return -1;
+ }
+ *buf_stride=current->strides[0];
+ }
+ 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;
+ }
+ current = drm_fb_get_from_bo(bo, b, is_opaque, BUFFER_CLIENT);
+
+ if (!current) {
+ weston_log("failed to get drm_fb from bo\n");
+ return -1;
+ }
+ *buf_stride=current->strides[0];
+ }
+ else {
+ weston_log("Buffer is not supported\n");
+ return -1;
+ }
+
+ ret = drmPrimeHandleToFD(b->drm.fd, current->handles[0],
+ 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_init_gamma_size(struct drm_output *output)
{
struct drm_backend *backend = to_drm_backend(output->base.compositor);
diff --git a/libweston/compositor-drm.h b/libweston/compositor-drm.h
index 71a306f..4f985d3 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, int *buf_stride);
};
static inline const struct weston_drm_output_api *
--
2.7.4
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