[PATCH 6/6] 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. Add wrapper
function to dump hardware blocks that contain sub blocks.

Signed-off-by: Ryan McCann <quic_rmccann@xxxxxxxxxxx>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 194 +++++++++++++++++++++++++++-----
 1 file changed, 168 insertions(+), 26 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..9b1b1c382269 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -885,6 +885,154 @@ static int dpu_irq_postinstall(struct msm_kms *kms)
 	return 0;
 }
 
+static void dpu_kms_mdp_snapshot_add_block(struct msm_disp_state *disp_state,
+					   void __iomem *mmio, void *blk,
+					   enum dpu_hw_blk_type blk_type)
+{
+	u32 base;
+
+	switch (blk_type) {
+	case DPU_HW_BLK_TOP:
+	{
+		struct dpu_mdp_cfg *top = (struct dpu_mdp_cfg *)blk;
+
+		if (top->features & BIT(DPU_MDP_PERIPH_0_REMOVED)) {
+			msm_disp_snapshot_add_block(disp_state, MDP_PERIPH_TOP0,
+						    mmio + top->base, "top");
+			msm_disp_snapshot_add_block(disp_state, top->len - MDP_PERIPH_TOP0_END,
+						    mmio + top->base + MDP_PERIPH_TOP0_END,
+						    "top_2");
+		} else {
+			msm_disp_snapshot_add_block(disp_state, top->len, mmio + top->base, "top");
+		}
+		break;
+	}
+	case DPU_HW_BLK_LM:
+	{
+		struct dpu_lm_cfg *mixer = (struct dpu_lm_cfg *)blk;
+
+		msm_disp_snapshot_add_block(disp_state, mixer->len, mmio + mixer->base, "%s",
+					    mixer->name);
+		break;
+	}
+	case DPU_HW_BLK_CTL:
+	{
+		struct dpu_ctl_cfg *ctl = (struct dpu_ctl_cfg *)blk;
+
+		msm_disp_snapshot_add_block(disp_state, ctl->len, mmio + ctl->base, "%s",
+					    ctl->name);
+		break;
+	}
+	case DPU_HW_BLK_INTF:
+	{
+		struct dpu_intf_cfg *intf = (struct dpu_intf_cfg *)blk;
+
+		msm_disp_snapshot_add_block(disp_state, intf->len, mmio + intf->base, "%s",
+					    intf->name);
+		break;
+	}
+	case DPU_HW_BLK_WB:
+	{
+		struct dpu_wb_cfg *wb = (struct dpu_wb_cfg *)blk;
+
+		msm_disp_snapshot_add_block(disp_state, wb->len, mmio + wb->base, "%s",
+					    wb->name);
+		break;
+	}
+	case DPU_HW_BLK_SSPP:
+	{
+		struct dpu_sspp_cfg *sspp_block = (struct dpu_sspp_cfg *)blk;
+		const struct dpu_sspp_sub_blks *sblk = sspp_block->sblk;
+
+		base = sspp_block->base;
+
+		msm_disp_snapshot_add_block(disp_state, sspp_block->len, mmio + base, "%s",
+					    sspp_block->name);
+
+		if (sspp_block->features & BIT(DPU_SSPP_SCALER_QSEED3) ||
+		    sspp_block->features & BIT(DPU_SSPP_SCALER_QSEED3LITE) ||
+		    sspp_block->features & BIT(DPU_SSPP_SCALER_QSEED4))
+			msm_disp_snapshot_add_block(disp_state, sblk->scaler_blk.len,
+						    mmio + base + sblk->scaler_blk.base, "%s_%s",
+						    sspp_block->name, sblk->scaler_blk.name);
+
+		if (sspp_block->features & BIT(DPU_SSPP_CSC) || sspp_block->features
+					& BIT(DPU_SSPP_CSC_10BIT))
+			msm_disp_snapshot_add_block(disp_state, sblk->csc_blk.len,
+						    mmio + base + sblk->csc_blk.base, "%s_%s",
+						    sspp_block->name, sblk->csc_blk.name);
+		break;
+	}
+	case DPU_HW_BLK_DSPP:
+	{
+		struct dpu_dspp_cfg *dspp_block = (struct dpu_dspp_cfg *)blk;
+
+		base = dspp_block->base;
+
+		msm_disp_snapshot_add_block(disp_state, dspp_block->len, mmio + base, "%s",
+					    dspp_block->name);
+
+		if (dspp_block->features & BIT(DPU_DSPP_PCC))
+			msm_disp_snapshot_add_block(disp_state, dspp_block->sblk->pcc.len,
+						    mmio + base + dspp_block->sblk->pcc.base,
+						    "%s_%s", dspp_block->name,
+						    dspp_block->sblk->pcc.name);
+		break;
+	}
+	case DPU_HW_BLK_PINGPONG:
+	{
+		struct dpu_pingpong_cfg *pingpong_block = (struct dpu_pingpong_cfg *)blk;
+		const struct dpu_pingpong_sub_blks *sblk = pingpong_block->sblk;
+
+		base = pingpong_block->base;
+
+		msm_disp_snapshot_add_block(disp_state, pingpong_block->len, mmio + base, "%s",
+					    pingpong_block->name);
+
+		if (pingpong_block->features & BIT(DPU_PINGPONG_TE2))
+			msm_disp_snapshot_add_block(disp_state, sblk->te2.len,
+						    mmio + base + sblk->te2.base, "%s_%s",
+						    pingpong_block->name, sblk->te2.name);
+
+		if (pingpong_block->features & BIT(DPU_PINGPONG_DITHER))
+			msm_disp_snapshot_add_block(disp_state, sblk->dither.len,
+						    mmio + base + sblk->dither.base, "%s_%s",
+						    pingpong_block->name, sblk->dither.name);
+		break;
+	}
+	case DPU_HW_BLK_DSC:
+	{
+		struct dpu_dsc_cfg *dsc_block = (struct dpu_dsc_cfg *)blk;
+
+		base = dsc_block->base;
+
+		if (dsc_block->features & BIT(DPU_DSC_HW_REV_1_2)) {
+			struct dpu_dsc_blk enc = dsc_block->sblk->enc;
+			struct dpu_dsc_blk ctl = dsc_block->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",
+						    dsc_block->name);
+			msm_disp_snapshot_add_block(disp_state, enc.len, mmio + base + enc.base,
+						    "%s_%s", dsc_block->name, enc.name);
+			msm_disp_snapshot_add_block(disp_state, ctl.len, mmio + base + ctl.base,
+						    "%s_%s", dsc_block->name, ctl.name);
+		} else {
+			msm_disp_snapshot_add_block(disp_state, dsc_block->len, mmio + base, "%s",
+						    dsc_block->name);
+		}
+		break;
+	}
+	default:
+		DPU_ERROR("Block type not supported.");
+	}
+}
+
 static void dpu_kms_mdp_snapshot(struct msm_disp_state *disp_state, struct msm_kms *kms)
 {
 	int i;
@@ -899,53 +1047,47 @@ static void dpu_kms_mdp_snapshot(struct msm_disp_state *disp_state, struct msm_k
 
 	/* 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);
+		dpu_kms_mdp_snapshot_add_block(disp_state, dpu_kms->mmio, (void *)&cat->ctl[i],
+					       DPU_HW_BLK_CTL);
 
 	/* 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);
+		dpu_kms_mdp_snapshot_add_block(disp_state, dpu_kms->mmio, (void *)&cat->dspp[i],
+					       DPU_HW_BLK_DSPP);
 
 	/* 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);
+		dpu_kms_mdp_snapshot_add_block(disp_state, dpu_kms->mmio, (void *)&cat->intf[i],
+					       DPU_HW_BLK_INTF);
 
 	/* 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);
+		dpu_kms_mdp_snapshot_add_block(disp_state, dpu_kms->mmio, (void *)&cat->pingpong[i],
+					       DPU_HW_BLK_PINGPONG);
 
 	/* 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);
+		dpu_kms_mdp_snapshot_add_block(disp_state, dpu_kms->mmio, (void *)&cat->sspp[i],
+					       DPU_HW_BLK_SSPP);
 
 	/* 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);
+		dpu_kms_mdp_snapshot_add_block(disp_state, dpu_kms->mmio, (void *)&cat->mixer[i],
+					       DPU_HW_BLK_LM);
 
 	/* 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);
-
-	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, cat->mdp[0].len - MDP_PERIPH_TOP0_END,
-				dpu_kms->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");
-	}
+		dpu_kms_mdp_snapshot_add_block(disp_state, dpu_kms->mmio, (void *)&cat->wb[i],
+					       DPU_HW_BLK_WB);
+
+	/* dump top block */
+	dpu_kms_mdp_snapshot_add_block(disp_state, dpu_kms->mmio, (void *)&cat->mdp[0],
+				       DPU_HW_BLK_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);
+		dpu_kms_mdp_snapshot_add_block(disp_state, dpu_kms->mmio, (void *)&cat->dsc[i],
+					       DPU_HW_BLK_DSC);
 
 	pm_runtime_put_sync(&dpu_kms->pdev->dev);
 }

-- 
2.25.1