kms_writeback test cases also verify with a null fb for the
writeback connector job. In addition there are also other
commit paths which can result in kickoffs without a valid
framebuffer like while closing the fb which results in the
callback to drm_atomic_helper_dirtyfb() which internally
triggers a commit.
Add protection in the dpu driver to ensure that commits for
writeback encoders without a valid fb are gracefully skipped.
changes in v2:
- rename dpu_encoder_has_valid_fb to dpu_encoder_is_valid_for_commit
changes in v3:
- none
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/483522/
Link: https://lore.kernel.org/r/1650984096-9964-17-git-send-email-quic_abhinavk@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
DPU_ATRACE_BEGIN("crtc_commit");
+ drm_for_each_encoder_mask(encoder, crtc->dev,
+ crtc->state->encoder_mask) {
+ if (!dpu_encoder_is_valid_for_commit(encoder)) {
+ DRM_DEBUG_ATOMIC("invalid FB not kicking off crtc\n");
+ goto end;
+ }
+ }
/*
* Encoder will flush/start now, unless it has a tx pending. If so, it
* may delay and flush at an irq event (e.g. ppdone)
dpu_encoder_kickoff(encoder);
reinit_completion(&dpu_crtc->frame_done_comp);
+
+end:
DPU_ATRACE_END("crtc_commit");
}
dpu_encoder_prep_dsc(dpu_enc, dpu_enc->dsc);
}
+bool dpu_encoder_is_valid_for_commit(struct drm_encoder *drm_enc)
+{
+ struct dpu_encoder_virt *dpu_enc;
+ unsigned int i;
+ struct dpu_encoder_phys *phys;
+
+ dpu_enc = to_dpu_encoder_virt(drm_enc);
+
+ if (drm_enc->encoder_type == DRM_MODE_ENCODER_VIRTUAL) {
+ for (i = 0; i < dpu_enc->num_phys_encs; i++) {
+ phys = dpu_enc->phys_encs[i];
+ if (phys->ops.is_valid_for_commit && !phys->ops.is_valid_for_commit(phys)) {
+ DPU_DEBUG("invalid FB not kicking off\n");
+ return false;
+ }
+ }
+ }
+
+ return true;
+}
+
void dpu_encoder_kickoff(struct drm_encoder *drm_enc)
{
struct dpu_encoder_virt *dpu_enc;
void dpu_encoder_cleanup_wb_job(struct drm_encoder *drm_enc,
struct drm_writeback_job *job);
+/**
+ * dpu_encoder_is_valid_for_commit - check if encode has valid parameters for commit.
+ * @drm_enc: Pointer to drm encoder structure
+ */
+bool dpu_encoder_is_valid_for_commit(struct drm_encoder *drm_enc);
+
#endif /* __DPU_ENCODER_H__ */
struct drm_writeback_job *job);
void (*cleanup_wb_job)(struct dpu_encoder_phys *phys_enc,
struct drm_writeback_job *job);
+ bool (*is_valid_for_commit)(struct dpu_encoder_phys *phys_enc);
};
/**
wb_enc->wb_conn = NULL;
}
+static bool dpu_encoder_phys_wb_is_valid_for_commit(struct dpu_encoder_phys *phys_enc)
+{
+ struct dpu_encoder_phys_wb *wb_enc = to_dpu_encoder_phys_wb(phys_enc);
+
+ if (wb_enc->wb_job)
+ return true;
+ else
+ return false;
+}
+
/**
* dpu_encoder_phys_wb_init_ops - initialize writeback operations
* @ops: Pointer to encoder operation table
ops->prepare_wb_job = dpu_encoder_phys_wb_prepare_wb_job;
ops->cleanup_wb_job = dpu_encoder_phys_wb_cleanup_wb_job;
ops->irq_control = dpu_encoder_phys_wb_irq_ctrl;
+ ops->is_valid_for_commit = dpu_encoder_phys_wb_is_valid_for_commit;
+
}
/**