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drm/msm/dpu: Add a null ptr check for dpu_encoder_needs_modeset

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The drm_atomic_get_new_connector_state() can return NULL if the
connector is not part of the atomic state. Add a check to prevent
a NULL pointer dereference.

This follows the same pattern used in dpu_encoder_update_topology()
within the same file, which checks for NULL before using conn_state.

Signed-off-by: Chenyuan Yang <chenyuan0y@gmail.com>
Fixes: 1ce69c265a ("drm/msm/dpu: move resource allocation to CRTC")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/665188/
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
This commit is contained in:
Chenyuan Yang 2025-07-22 16:17:40 -05:00 committed by Rob Clark
parent 7ab3b7579a
commit abebfed208
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
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@ -730,6 +730,8 @@ bool dpu_encoder_needs_modeset(struct drm_encoder *drm_enc, struct drm_atomic_st
return false; return false;
conn_state = drm_atomic_get_new_connector_state(state, connector); conn_state = drm_atomic_get_new_connector_state(state, connector);
if (!conn_state)
return false;
/** /**
* These checks are duplicated from dpu_encoder_update_topology() since * These checks are duplicated from dpu_encoder_update_topology() since