User may send null writeback configurations for writeback connector like:
- Only bind the writeback connector to crtc.
- set a fb_id(0) to writeback_fb_id_property
All above configurations are meaningless for writeback, but since they are
still valid configurations, accept them.
Depends on:
- https://patchwork.freedesktop.org/series/60856/
Signed-off-by: James Qian Wang (Arm Technology China) <[email protected]>
---
.../gpu/drm/arm/display/komeda/komeda_wb_connector.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
index 20295291572f..0d734244f662 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
@@ -13,11 +13,7 @@ komeda_wb_init_data_flow(struct komeda_layer *wb_layer,
struct komeda_crtc_state *kcrtc_st,
struct komeda_data_flow_cfg *dflow)
{
- struct drm_framebuffer *fb = conn_st->writeback_job ?
- conn_st->writeback_job->fb : NULL;
-
- if (!fb)
- return -EINVAL;
+ struct drm_framebuffer *fb = conn_st->writeback_job->fb;
memset(dflow, 0, sizeof(*dflow));
@@ -42,10 +38,15 @@ komeda_wb_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_connector_state *conn_st)
{
struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st);
+ struct drm_writeback_job *writeback_job = conn_st->writeback_job;
struct komeda_layer *wb_layer;
struct komeda_data_flow_cfg dflow;
int err;
+ if (!writeback_job || !writeback_job->fb) {
+ return 0;
+ }
+
if (!crtc_st->active) {
DRM_DEBUG_ATOMIC("Cannot write the composition result out on a inactive CRTC.\n");
return -EINVAL;
--
2.17.1