Re: [PATCH v4 6/6] drm/msm/dpu: Update dev core dump to dump registers of sub-blocks
From: Dmitry Baryshkov
Date: Thu Jul 06 2023 - 20:24:22 EST
On 06/07/2023 23:48, Ryan McCann wrote:
Currently, the device core dump mechanism does not dump registers of
sub-blocks within the DSPP, SSPP, DSC, and PINGPONG blocks. Edit
dpu_kms_mdp_snapshot function to account for sub-blocks.
Signed-off-by: Ryan McCann <quic_rmccann@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 66 ++++++++++++++++++++++++++++++---
1 file changed, 60 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 70dbb1204e6c..afc45d597d65 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -903,25 +903,58 @@ static void dpu_kms_mdp_snapshot(struct msm_disp_state *disp_state, struct msm_k
cat->ctl[i].base, cat->ctl[i].name);
/* dump DSPP sub-blocks HW regs info */
- for (i = 0; i < cat->dspp_count; i++)
+ for (i = 0; i < cat->dspp_count; i++) {
msm_disp_snapshot_add_block(disp_state, cat->dspp[i].len, dpu_kms->mmio +
cat->dspp[i].base, cat->dspp[i].name);
+ if (cat->dspp[i].sblk && cat->dspp[i].sblk->pcc.len > 0)
+ msm_disp_snapshot_add_block(disp_state, cat->dspp[i].sblk->pcc.len,
+ dpu_kms->mmio + cat->dspp[i].base +
+ cat->dspp[i].sblk->pcc.base, "%s_%s",
This might look simpler in the following form. Could you please consider it?
void *base = dpu_kms + cat->dspp[i].base;
msm_disp_snapshot_add_block(..., base, cat->dspp[i].name)
if (!cat->dspp[i].sblk)
continue;
if (cat->dspp[i].sblk->pcc.len)
msm_disp_snapshot_add_block(..., base +
cat->dspp[i].sblk->pcc.base, ...);
+ cat->dspp[i].name,
+ cat->dspp[i].sblk->pcc.name);
+ }
+
/* dump INTF sub-blocks HW regs info */
for (i = 0; i < cat->intf_count; i++)
msm_disp_snapshot_add_block(disp_state, cat->intf[i].len, dpu_kms->mmio +
cat->intf[i].base, cat->intf[i].name);
/* dump PP sub-blocks HW regs info */
- for (i = 0; i < cat->pingpong_count; i++)
+ for (i = 0; i < cat->pingpong_count; i++) {
msm_disp_snapshot_add_block(disp_state, cat->pingpong[i].len, dpu_kms->mmio +
cat->pingpong[i].base, cat->pingpong[i].name);
+ /* TE2 block has length of 0, so will not print it */
+
+ if (cat->pingpong[i].sblk && cat->pingpong[i].sblk->dither.len > 0)
+ msm_disp_snapshot_add_block(disp_state, cat->pingpong[i].sblk->dither.len,
+ dpu_kms->mmio + cat->pingpong[i].base +
+ cat->pingpong[i].sblk->dither.base, "%s_%s",
+ cat->pingpong[i].name,
+ cat->pingpong[i].sblk->dither.name);
+ }
+
/* dump SSPP sub-blocks HW regs info */
- for (i = 0; i < cat->sspp_count; i++)
+ for (i = 0; i < cat->sspp_count; i++) {
msm_disp_snapshot_add_block(disp_state, cat->sspp[i].len, dpu_kms->mmio +
cat->sspp[i].base, cat->sspp[i].name);
+ if (cat->sspp[i].sblk && cat->sspp[i].sblk->scaler_blk.len > 0)
+ msm_disp_snapshot_add_block(disp_state, cat->sspp[i].sblk->scaler_blk.len,
+ dpu_kms->mmio + cat->sspp[i].base +
+ cat->sspp[i].sblk->scaler_blk.base, "%s_%s",
+ cat->sspp[i].name,
+ cat->sspp[i].sblk->scaler_blk.name);
+
+ if (cat->sspp[i].sblk && cat->sspp[i].sblk->csc_blk.len > 0)
+ msm_disp_snapshot_add_block(disp_state, cat->sspp[i].sblk->csc_blk.len,
+ dpu_kms->mmio + cat->sspp[i].base +
+ cat->sspp[i].sblk->csc_blk.base, "%s_%s",
+ cat->sspp[i].name,
+ cat->sspp[i].sblk->csc_blk.name);
+ }
+
/* dump LM sub-blocks HW regs info */
for (i = 0; i < cat->mixer_count; i++)
msm_disp_snapshot_add_block(disp_state, cat->mixer[i].len, dpu_kms->mmio +
@@ -943,9 +976,30 @@ static void dpu_kms_mdp_snapshot(struct msm_disp_state *disp_state, struct msm_k
}
/* dump DSC sub-blocks HW regs info */
- for (i = 0; i < cat->dsc_count; i++)
- msm_disp_snapshot_add_block(disp_state, cat->dsc[i].len, dpu_kms->mmio +
- cat->dsc[i].base, cat->dsc[i].name);
+ for (i = 0; i < cat->dsc_count; i++) {
+ if (cat->dsc[i].features & BIT(DPU_DSC_HW_REV_1_2)) {
+ struct dpu_dsc_blk enc = cat->dsc[i].sblk->enc;
+ struct dpu_dsc_blk ctl = cat->dsc[i].sblk->ctl;
+
+ /* For now, pass in a length of 0 because the DSC_BLK register space
+ * overlaps with the sblks' register space.
+ *
+ * TODO: Pass in a length of 0 to DSC_BLK_1_2 in the HW catalog where
+ * applicable.
Please assume that https://patchwork.freedesktop.org/series/119776/ and
rebase your code on top of it.
+ */
+ msm_disp_snapshot_add_block(disp_state, 0, dpu_kms->mmio +
+ cat->dsc[i].base, cat->dsc[i].name);
+ msm_disp_snapshot_add_block(disp_state, enc.len, dpu_kms->mmio +
+ cat->dsc[i].base + enc.base, "%s_%s",
+ cat->dsc[i].name, enc.name);
+ msm_disp_snapshot_add_block(disp_state, ctl.len, dpu_kms->mmio +
+ cat->dsc[i].base + ctl.base, "%s_%s",
+ cat->dsc[i].name, ctl.name);
+ } else {
+ msm_disp_snapshot_add_block(disp_state, cat->dsc[i].len, dpu_kms->mmio +
+ cat->dsc[i].base, cat->dsc[i].name);
+ }
+ }
pm_runtime_put_sync(&dpu_kms->pdev->dev);
}
--
With best wishes
Dmitry