[PATCH v2 5/5] drm/msm/dpu: Update dev core dump to dump registers of sub-blocks

[Ryan McCann]

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 | 106 ++++++++++++++++++++++++--------
 1 file changed, 82 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index aa8499de1b9f..c83f5d79e5c5 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -890,62 +890,120 @@ static void dpu_kms_mdp_snapshot(struct msm_disp_state *disp_state, struct msm_k
 	int i;
 	struct dpu_kms *dpu_kms;
 	const struct dpu_mdss_cfg *cat;
+	void __iomem *mmio;
+	u32 base;
 
 	dpu_kms = to_dpu_kms(kms);
 
 	cat = dpu_kms->catalog;
+	mmio = dpu_kms->mmio;
 
 	pm_runtime_get_sync(&dpu_kms->pdev->dev);
 
 	/* dump CTL sub-blocks HW regs info */
 	for (i = 0; i < cat->ctl_count; i++)
-		msm_disp_snapshot_add_block(disp_state, cat->ctl[i].len,
-				dpu_kms->mmio + cat->ctl[i].base, "ctl_%d", i);
+		msm_disp_snapshot_add_block(disp_state, cat->ctl[i].len, mmio + cat->ctl[i].base,
+					    "%s", cat->ctl[i].name);
 
 	/* dump DSPP sub-blocks HW regs info */
-	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, "dspp_%d", i);
+	for (i = 0; i < cat->dspp_count; i++) {
+		base = cat->dspp[i].base;
+		msm_disp_snapshot_add_block(disp_state, cat->dspp[i].len, mmio + base, "%s",
+					    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,
+						    mmio + base + cat->dspp[i].sblk->pcc.base,
+						    "%s_%s", 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, "intf_%d", i);
+		msm_disp_snapshot_add_block(disp_state, cat->intf[i].len, mmio + cat->intf[i].base,
+					    "%s", cat->intf[i].name);
 
 	/* dump PP sub-blocks HW regs info */
-	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, "pingpong_%d", i);
+	for (i = 0; i < cat->pingpong_count; i++) {
+		base = cat->pingpong[i].base;
+		msm_disp_snapshot_add_block(disp_state, cat->pingpong[i].len, mmio + base, "%s",
+					    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,
+						    mmio + 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++)
-		msm_disp_snapshot_add_block(disp_state, cat->sspp[i].len,
-				dpu_kms->mmio + cat->sspp[i].base, "sspp_%d", i);
+	for (i = 0; i < cat->sspp_count; i++) {
+		base = cat->sspp[i].base;
+		msm_disp_snapshot_add_block(disp_state, cat->sspp[i].len, mmio + cat->sspp[i].base,
+					    "%s", 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,
+						    mmio + 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,
+						    mmio + 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 + cat->mixer[i].base, "lm_%d", i);
+					    mmio + cat->mixer[i].base,
+					    "%s", cat->mixer[i].name);
 
 	/* 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, cat->wb[i].len, mmio + cat->wb[i].base,
+					    "%s", cat->wb[i].name);
 
 	if (cat->mdp[0].features & BIT(DPU_MDP_PERIPH_0_REMOVED)) {
-		msm_disp_snapshot_add_block(disp_state, MDP_PERIPH_TOP0,
-				dpu_kms->mmio + cat->mdp[0].base, "top");
+		msm_disp_snapshot_add_block(disp_state, MDP_PERIPH_TOP0, mmio + cat->mdp[0].base,
+					    "top");
 		msm_disp_snapshot_add_block(disp_state, cat->mdp[0].len - MDP_PERIPH_TOP0_END,
-				dpu_kms->mmio + cat->mdp[0].base + MDP_PERIPH_TOP0_END, "top_2");
+					    mmio + cat->mdp[0].base + MDP_PERIPH_TOP0_END,
+					    "top_2");
 	} else {
-		msm_disp_snapshot_add_block(disp_state, cat->mdp[0].len,
-				dpu_kms->mmio + cat->mdp[0].base, "top");
+		msm_disp_snapshot_add_block(disp_state, cat->mdp[0].len, mmio + cat->mdp[0].base,
+					    "top");
 	}
 
 	/* 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, "dsc_%d", i);
+	for (i = 0; i < cat->dsc_count; i++) {
+		base = cat->dsc[i].base;
+
+		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 t0 DSC_BLK_1_2 in the HW catalog where
+			 * applicable.
+			 */
+			msm_disp_snapshot_add_block(disp_state, 0, mmio + base, "%s", cat->dsc[i].name);
+			msm_disp_snapshot_add_block(disp_state, enc.len, mmio + base + enc.base,
+						    "%s_%s", cat->dsc[i].name, enc.name);
+			msm_disp_snapshot_add_block(disp_state, ctl.len, mmio + base + ctl.base,
+						    "%s_%s", cat->dsc[i].name, ctl.name);
+		} else {
+			msm_disp_snapshot_add_block(disp_state, cat->dsc[i].len, mmio + base, "%s",
+						    cat->dsc[i].name);
+		}
+	}
 
 	pm_runtime_put_sync(&dpu_kms->pdev->dev);
 }

-- 
2.25.1