Add writeback block information while capturing the display
snapshot.

Signed-off-by: Abhinav Kumar <quic_abhin...@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 9a406e1..b18bff8 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -945,6 +945,11 @@ static void dpu_kms_mdp_snapshot(struct msm_disp_state 
*disp_state, struct msm_k
                msm_disp_snapshot_add_block(disp_state, cat->mixer[i].len,
                                dpu_kms->mmio + cat->mixer[i].base, "lm_%d", i);
 
+       /* dump WB sub-blocks HW regs info */
+       for (i = 0; i < cat->wb_count; i++)
+               msm_disp_snapshot_add_block(disp_state, cat->wb[i].len,
+                               dpu_kms->mmio + cat->wb[i].base, "wb_%d", i);
+
        msm_disp_snapshot_add_block(disp_state, top->hw.length,
                        dpu_kms->mmio + top->hw.blk_off, "top");
 
-- 
2.7.4

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