drm: add fallback drmModeAddFB for drivers which do not support drmModeAddFB2
This makes wlroots able to run on some big-endian machines like G4 and
G5 systems with ATI Radeon 7500 AGP graphics.
@@ -170,6 +170,35 @@ const char *conn_get_name(uint32_t type_id) {
}
}
+static uint32_t get_fb_for_bo_legacy(struct gbm_bo *bo) {
+ struct gbm_device *gbm = gbm_bo_get_device(bo);
+
+ /* We only support this as a fallback of last resort for ARGB8888 visuals,
+ * like xf86-video-modesetting does. This is necessary on BE machines. */
+ if (gbm_bo_get_format(bo) != GBM_FORMAT_ARGB8888 ||
+ gbm_bo_get_plane_count(bo) != 1) {
+ wlr_log(WLR_DEBUG,
+ "Invalid visual %x (%d planes) requested for legacy DRM framebuffer",
+ gbm_bo_get_format(bo), gbm_bo_get_plane_count(bo));
+ return 0;
+ }
+
+ int fd = gbm_device_get_fd(gbm);
+ uint32_t width = gbm_bo_get_width(bo);
+ uint32_t height = gbm_bo_get_height(bo);
+ uint32_t depth = 32;
+ uint32_t bpp = gbm_bo_get_bpp(bo);
+ uint32_t pitch = gbm_bo_get_stride(bo);
+ uint32_t handle = gbm_bo_get_handle(bo).u32;
+
+ uint32_t id = 0;
+ if (drmModeAddFB(fd, width, height, depth, bpp, pitch, handle, &id)) {
+ wlr_log_errno(WLR_ERROR, "Unable to add DRM framebuffer");
+ }
+
+ return id;
+}
+
uint32_t get_fb_for_bo(struct gbm_bo *bo, bool with_modifiers) {
struct gbm_device *gbm = gbm_bo_get_device(bo);
@@ -199,7 +228,12 @@ uint32_t get_fb_for_bo(struct gbm_bo *bo, bool with_modifiers) {
} else {
if (drmModeAddFB2(fd, width, height, format, handles, strides,
offsets, &id, 0)) {
- wlr_log_errno(WLR_ERROR, "Unable to add DRM framebuffer");
+ wlr_log_errno(WLR_DEBUG,
+ "Unable to add DRM framebuffer, trying legacy method");
+ id = get_fb_for_bo_legacy(bo);
+ if (id == 0) {
+ wlr_log(WLR_ERROR, "Unable to add DRM framebuffer");
+ }
}
}
