Merge pull request #182 from ascent12/drm-multi-gpu

DRM Multi-GPU

1 files changed, 66 insertions, 0 deletions

diff --git a/backend/drm/legacy.c b/backend/drm/legacy.c
new file mode 100644
index 00000000..d75eb2cb
--- /dev/null
+++ b/backend/drm/legacy.c
@@ -0,0 +1,66 @@
+#include <gbm.h>
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+#include <wlr/util/log.h>
+#include "backend/drm/drm.h"
+#include "backend/drm/iface.h"
+#include "backend/drm/util.h"
+
+static bool legacy_crtc_pageflip(struct wlr_drm_backend *drm,
+		struct wlr_drm_connector *conn, struct wlr_drm_crtc *crtc,
+		uint32_t fb_id, drmModeModeInfo *mode) {
+	if (mode) {
+		if (drmModeSetCrtc(drm->fd, crtc->id, fb_id, 0, 0,
+				&conn->id, 1, mode)) {
+			wlr_log_errno(L_ERROR, "%s: Failed to set CRTC", conn->output.name);
+			return false;
+		}
+	}
+
+	if (drmModePageFlip(drm->fd, crtc->id, fb_id, DRM_MODE_PAGE_FLIP_EVENT, conn)) {
+		wlr_log_errno(L_ERROR, "%s: Failed to page flip", conn->output.name);
+		return false;
+	}
+
+	return true;
+}
+
+static void legacy_conn_enable(struct wlr_drm_backend *drm,
+		struct wlr_drm_connector *conn, bool enable) {
+	drmModeConnectorSetProperty(drm->fd, conn->id, conn->props.dpms,
+		enable ? DRM_MODE_DPMS_ON : DRM_MODE_DPMS_OFF);
+}
+
+bool legacy_crtc_set_cursor(struct wlr_drm_backend *drm,
+		struct wlr_drm_crtc *crtc, struct gbm_bo *bo) {
+	if (!crtc || !crtc->cursor) {
+		return true;
+	}
+
+	if (!bo) {
+		drmModeSetCursor(drm->fd, crtc->id, 0, 0, 0);
+		return true;
+	}
+
+	struct wlr_drm_plane *plane = crtc->cursor;
+
+	if (drmModeSetCursor(drm->fd, crtc->id, gbm_bo_get_handle(bo).u32,
+			plane->surf.width, plane->surf.height)) {
+		wlr_log_errno(L_ERROR, "Failed to set hardware cursor");
+		return false;
+	}
+
+	return true;
+}
+
+bool legacy_crtc_move_cursor(struct wlr_drm_backend *drm,
+		struct wlr_drm_crtc *crtc, int x, int y) {
+	return !drmModeMoveCursor(drm->fd, crtc->id, x, y);
+}
+
+const struct wlr_drm_interface legacy_iface = {
+	.conn_enable = legacy_conn_enable,
+	.crtc_pageflip = legacy_crtc_pageflip,
+	.crtc_set_cursor = legacy_crtc_set_cursor,
+	.crtc_move_cursor = legacy_crtc_move_cursor,
+};