Initializing and registering fbdev requires at least one DRM connector
and will fail otherwise. In order to support headless setups (for
instance for GPU rendering with the GBM backend, where a DRI card node
is required to provide GEM memory reservation), add a check on the
number of registered connectors before initializing fbdev.
Signed-off-by: Paul Kocialkowski <cont...@paulk.fr>
---
drivers/gpu/drm/sun4i/sun4i_framebuffer.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/sun4i/sun4i_framebuffer.c
b/drivers/gpu/drm/sun4i/sun4i_framebuffer.c
index 5f29850ef8ac..19a265e4a93a 100644
--- a/drivers/gpu/drm/sun4i/sun4i_framebuffer.c
+++ b/drivers/gpu/drm/sun4i/sun4i_framebuffer.c
@@ -49,6 +49,8 @@ static struct drm_mode_config_helper_funcs
sun4i_de_mode_config_helpers = {
int sun4i_framebuffer_init(struct drm_device *drm)
{
+ int ret;
+
drm_mode_config_reset(drm);
drm->mode_config.max_width = 8192;
@@ -57,7 +59,13 @@ int sun4i_framebuffer_init(struct drm_device *drm)
drm->mode_config.funcs = &sun4i_de_mode_config_funcs;
drm->mode_config.helper_private = &sun4i_de_mode_config_helpers;
- return drm_fb_cma_fbdev_init(drm, 32, 0);
+ if (drm->mode_config.num_connector > 0) {
+ ret = drm_fb_cma_fbdev_init(drm, 32, 0);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
}
void sun4i_framebuffer_free(struct drm_device *drm)
--
2.18.0
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