xref: /OK3568_Linux_fs/buildroot/package/weston/0060-backend-drm-Support-getting-drm-fb-from-dmabuf-direc.patch (revision 4882a59341e53eb6f0b4789bf948001014eff981)

From cc29cd4d7e5cda2ee39456aed5fd92eca03e9cf5 Mon Sep 17 00:00:00 2001
From: Jeffy Chen <jeffy.chen@rock-chips.com>
Date: Mon, 7 Mar 2022 15:56:19 +0800
Subject: [PATCH 60/92] backend-drm: Support getting drm fb from dmabuf
 directly

Try to import dmabuf to drm fb directly when GBM fd-import not working.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
---
 libweston/backend-drm/fb.c | 50 +++++++++++++++++++++++---------------
 1 file changed, 31 insertions(+), 19 deletions(-)

diff --git a/libweston/backend-drm/fb.c b/libweston/backend-drm/fb.c
index 8c4c49c..6dc098d 100644
--- a/libweston/backend-drm/fb.c
+++ b/libweston/backend-drm/fb.c
@@ -224,10 +224,18 @@ drm_fb_destroy_gbm(struct gbm_bo *bo, void *data)
 static void
 drm_fb_destroy_dmabuf(struct drm_fb *fb)
 {
-	/* We deliberately do not close the GEM handles here; GBM manages
-	 * their lifetime through the BO. */
-	if (fb->bo)
+	if (fb->bo) {
+		/* We deliberately do not close the GEM handles here; GBM manages
+		 * their lifetime through the BO. */
 		gbm_bo_destroy(fb->bo);
+	} else {
+		int i;
+		for (i = 0; i < fb->num_planes; i++) {
+			struct drm_gem_close arg = { fb->handles[i], };
+			drmIoctl(fb->fd, DRM_IOCTL_GEM_CLOSE, &arg);
+		}
+	}
+
 	drm_fb_destroy(fb);
 }

@@ -294,13 +302,6 @@ drm_fb_get_from_dmabuf(struct linux_dmabuf_buffer *dmabuf,

 	fb->bo = gbm_bo_import(backend->gbm, GBM_BO_IMPORT_FD_MODIFIER,
 			       &import_mod, GBM_BO_USE_SCANOUT);
-	if (!fb->bo) {
-		if (try_view_on_plane_failure_reasons)
-			*try_view_on_plane_failure_reasons |=
-				FAILURE_REASONS_GBM_BO_IMPORT_FAILED;
-		goto err_free;
-	}
-
 	fb->width = dmabuf->attributes.width;
 	fb->height = dmabuf->attributes.height;
 	fb->modifier = dmabuf->attributes.modifier[0];
@@ -329,16 +330,27 @@ drm_fb_get_from_dmabuf(struct linux_dmabuf_buffer *dmabuf,
 	}

 	fb->num_planes = dmabuf->attributes.n_planes;
-	for (i = 0; i < dmabuf->attributes.n_planes; i++) {
-		union gbm_bo_handle handle;
-
-	        handle = gbm_bo_get_handle_for_plane(fb->bo, i);
-		if (handle.s32 == -1) {
-			*try_view_on_plane_failure_reasons |=
-				FAILURE_REASONS_GBM_BO_GET_HANDLE_FAILED;
-			goto err_free;
+	if (fb->bo) {
+		for (i = 0; i < fb->num_planes; i++) {
+			union gbm_bo_handle handle;
+
+		        handle = gbm_bo_get_handle_for_plane(fb->bo, i);
+			if (handle.s32 == -1) {
+				*try_view_on_plane_failure_reasons |=
+					FAILURE_REASONS_GBM_BO_GET_HANDLE_FAILED;
+				goto err_free;
+			}
+			fb->handles[i] = handle.u32;
+		}
+	} else {
+		for (i = 0; i < fb->num_planes; i++) {
+			if (drmPrimeFDToHandle(fb->fd, import_mod.fds[i],
+					       &fb->handles[i])) {
+				*try_view_on_plane_failure_reasons |=
+					FAILURE_REASONS_GBM_BO_IMPORT_FAILED;
+				goto err_free;
+			}
 		}
-		fb->handles[i] = handle.u32;
 	}

 	if (drm_fb_addfb(device, fb) != 0) {
--
2.20.1