[PATCH v2 4/4] drm/msm/dsi: add DSI PHY registers to snapshot data

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

Add DSI PHY registers to the msm state snapshots to be able to check
their contents.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dsi/dsi.c         |  1 +
 drivers/gpu/drm/msm/dsi/dsi.h         |  1 +
 drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 31 +++++++++++++++++++++++----
 drivers/gpu/drm/msm/dsi/phy/dsi_phy.h |  4 ++++
 4 files changed, 33 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
index 322d2e535df0..75afc12a7b25 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.c
+++ b/drivers/gpu/drm/msm/dsi/dsi.c
@@ -269,5 +269,6 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
 void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi)
 {
 	msm_dsi_host_snapshot(disp_state, msm_dsi->host);
+	msm_dsi_phy_snapshot(disp_state, msm_dsi->phy);
 }
 
diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
index b5679cf89413..cea73f9c4be9 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.h
@@ -176,6 +176,7 @@ int msm_dsi_phy_get_clk_provider(struct msm_dsi_phy *phy,
 	struct clk **byte_clk_provider, struct clk **pixel_clk_provider);
 void msm_dsi_phy_pll_save_state(struct msm_dsi_phy *phy);
 int msm_dsi_phy_pll_restore_state(struct msm_dsi_phy *phy);
+void msm_dsi_phy_snapshot(struct msm_disp_state *disp_state, struct msm_dsi_phy *phy);
 
 #endif /* __DSI_CONNECTOR_H__ */
 
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
index f0a2ddf96a4b..bf7a4c20c13c 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
@@ -658,14 +658,14 @@ static int dsi_phy_driver_probe(struct platform_device *pdev)
 	phy->regulator_ldo_mode = of_property_read_bool(dev->of_node,
 				"qcom,dsi-phy-regulator-ldo-mode");
 
-	phy->base = msm_ioremap(pdev, "dsi_phy", "DSI_PHY");
+	phy->base = msm_ioremap_size(pdev, "dsi_phy", "DSI_PHY", &phy->base_size);
 	if (IS_ERR(phy->base)) {
 		DRM_DEV_ERROR(dev, "%s: failed to map phy base\n", __func__);
 		ret = -ENOMEM;
 		goto fail;
 	}
 
-	phy->pll_base = msm_ioremap(pdev, "dsi_pll", "DSI_PLL");
+	phy->pll_base = msm_ioremap_size(pdev, "dsi_pll", "DSI_PLL", &phy->pll_size);
 	if (IS_ERR(phy->pll_base)) {
 		DRM_DEV_ERROR(&pdev->dev, "%s: failed to map pll base\n", __func__);
 		ret = -ENOMEM;
@@ -673,7 +673,7 @@ static int dsi_phy_driver_probe(struct platform_device *pdev)
 	}
 
 	if (phy->cfg->has_phy_lane) {
-		phy->lane_base = msm_ioremap(pdev, "dsi_phy_lane", "DSI_PHY_LANE");
+		phy->lane_base = msm_ioremap_size(pdev, "dsi_phy_lane", "DSI_PHY_LANE", &phy->lane_size);
 		if (IS_ERR(phy->lane_base)) {
 			DRM_DEV_ERROR(&pdev->dev, "%s: failed to map phy lane base\n", __func__);
 			ret = -ENOMEM;
@@ -682,7 +682,7 @@ static int dsi_phy_driver_probe(struct platform_device *pdev)
 	}
 
 	if (phy->cfg->has_phy_regulator) {
-		phy->reg_base = msm_ioremap(pdev, "dsi_phy_regulator", "DSI_PHY_REG");
+		phy->reg_base = msm_ioremap_size(pdev, "dsi_phy_regulator", "DSI_PHY_REG", &phy->reg_size);
 		if (IS_ERR(phy->reg_base)) {
 			DRM_DEV_ERROR(&pdev->dev, "%s: failed to map phy regulator base\n", __func__);
 			ret = -ENOMEM;
@@ -868,3 +868,26 @@ int msm_dsi_phy_pll_restore_state(struct msm_dsi_phy *phy)
 
 	return 0;
 }
+
+void msm_dsi_phy_snapshot(struct msm_disp_state *disp_state, struct msm_dsi_phy *phy)
+{
+	msm_disp_snapshot_add_block(disp_state,
+			phy->base_size, phy->base,
+			"dsi%d_phy", phy->id);
+
+	/* Do not try accessing PLL registers if it is switched off */
+	if (phy->pll_on)
+		msm_disp_snapshot_add_block(disp_state,
+			phy->pll_size, phy->pll_base,
+			"dsi%d_pll", phy->id);
+
+	if (phy->lane_base)
+		msm_disp_snapshot_add_block(disp_state,
+			phy->lane_size, phy->lane_base,
+			"dsi%d_lane", phy->id);
+
+	if (phy->reg_base)
+		msm_disp_snapshot_add_block(disp_state,
+			phy->reg_size, phy->reg_base,
+			"dsi%d_reg", phy->id);
+}
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
index 94a77ac364d3..5b0feef87127 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
@@ -85,6 +85,10 @@ struct msm_dsi_phy {
 	void __iomem *pll_base;
 	void __iomem *reg_base;
 	void __iomem *lane_base;
+	phys_addr_t base_size;
+	phys_addr_t pll_size;
+	phys_addr_t reg_size;
+	phys_addr_t lane_size;
 	int id;
 
 	struct clk *ahb_clk;
-- 
2.30.2