msm: isp: Add support for VFE dual camera resolution limit

Read VFE resolution limitation from VFE fuse register
and restrict support for dual camera resolution.

Change-Id: I5f1c8878bd1039a40c7c8ecc5934757707e0123e
Signed-off-by: Venu Yeshala <vyeshala@codeaurora.org>

Documentation/devicetree/bindings/media/video/msm-vfe.txt

@@ -23,6 +23,7 @@ Required properties for child node:
     Only needed for child node.
     - "vfe" - Required.
     - "vfe_vbif" - Optional for "vfe32". Required for "vfe40".
+    - "vfe_fuse" - Optional.
 - interrupts : should contain the vfe interrupt.
 - interrupt-names : should specify relevant names to each interrupts
   property defined.
@@ -52,9 +53,10 @@ Example:
 vfe0: qcom,vfe0@fda10000 {
 	cell-index = <0>;
 	compatible = "qcom,vfe44";
-	reg = <0xfda10000 0x1000>;
-		<0xfda40000 0x200>;
-	reg-names = "vfe", "vfe_vbif";
+	reg = <0xfda10000 0x1000>,
+		<0xfda40000 0x200>,
+		<0x7801a4 0x8>;
+	reg-names = "vfe", "vfe_vbif", "vfe_fuse";
 	interrupts = <0 57 0>;
 	interrupt-names = "vfe";
 	vdd-supply = <&gdsc_vfe>;
@@ -105,9 +107,10 @@ vfe0: qcom,vfe0@fda10000 {
 vfe1: qcom,vfe1@fda14000 {
 	cell-index = <1>;
 	compatible = "qcom,vfe44";
-	reg = <0xfda14000 0x1000>;
-		<0xfda40000 0x200>;
-	reg-names = "vfe", "vfe_vbif";
+	reg = <0xfda14000 0x1000>,
+		<0xfda40000 0x200>,
+		<0x7801a4 0x8>;
+	reg-names = "vfe", "vfe_vbif", "vfe_fuse";
 	interrupts = <0 58 0>;
 	interrupt-names = "vfe";
 	vdd-supply = <&gdsc_vfe>;

drivers/media/platform/msm/camera_v2/isp/msm_isp.h

@@ -809,6 +809,7 @@ struct vfe_device {
 	uint32_t is_split;
 	uint32_t dual_vfe_enable;
 	unsigned long page_fault_addr;
+	uint32_t vfe_hw_limit;
 
 	/* Debug variables */
 	int dump_reg;

drivers/media/platform/msm/camera_v2/isp/msm_isp47.c

@@ -2742,6 +2742,8 @@ int msm_vfe47_enable_regulators(struct vfe_device *vfe_dev, int enable)
 int msm_vfe47_get_platform_data(struct vfe_device *vfe_dev)
 {
 	int rc = 0;
+	void __iomem *vfe_fuse_base;
+	uint32_t vfe_fuse_base_size;
 
 	vfe_dev->vfe_base = msm_camera_get_reg_base(vfe_dev->pdev, "vfe", 0);
 	if (!vfe_dev->vfe_base)
@@ -2766,7 +2768,18 @@ int msm_vfe47_get_platform_data(struct vfe_device *vfe_dev)
 		rc = -ENOMEM;
 		goto get_res_fail;
 	}
-
+	vfe_dev->vfe_hw_limit = 0;
+	vfe_fuse_base = msm_camera_get_reg_base(vfe_dev->pdev,
+					"vfe_fuse", 0);
+	vfe_fuse_base_size = msm_camera_get_res_size(vfe_dev->pdev,
+						"vfe_fuse");
+	if (vfe_fuse_base) {
+		if (vfe_fuse_base_size)
+			vfe_dev->vfe_hw_limit =
+				(msm_camera_io_r(vfe_fuse_base) >> 5) & 0x1;
+		msm_camera_put_reg_base(vfe_dev->pdev, vfe_fuse_base,
+				"vfe_fuse", 0);
+	}
 	rc = vfe_dev->hw_info->vfe_ops.platform_ops.get_regulators(vfe_dev);
 	if (rc)
 		goto get_regulator_fail;

drivers/media/platform/msm/camera_v2/isp/msm_isp_util.c

@@ -1428,6 +1428,20 @@ static int msm_isp_send_hw_cmd(struct vfe_device *vfe_dev,
 		vfe_dev->vfe_ub_policy = *cfg_data;
 		break;
 	}
+	case GET_VFE_HW_LIMIT: {
+		uint32_t *hw_limit = NULL;
+
+		if (cmd_len < sizeof(uint32_t)) {
+			pr_err("%s:%d failed: invalid cmd len %u exp %zu\n",
+				__func__, __LINE__, cmd_len,
+				sizeof(uint32_t));
+			return -EINVAL;
+		}
+
+		hw_limit = (uint32_t *)cfg_data;
+		*hw_limit = vfe_dev->vfe_hw_limit;
+		break;
+	}
 	}
 	return 0;
 }

include/uapi/media/msmb_isp.h

@@ -24,6 +24,8 @@
 
 #define ISP_STATS_STREAM_BIT  0x80000000
 
+#define VFE_HW_LIMIT 1
+
 struct msm_vfe_cfg_cmd_list;
 
 enum ISP_START_PIXEL_PATTERN {
@@ -456,6 +458,7 @@ enum msm_vfe_reg_cfg_type {
 	VFE_HW_UPDATE_UNLOCK,
 	SET_WM_UB_SIZE,
 	SET_UB_POLICY,
+	GET_VFE_HW_LIMIT,
 };
 
 struct msm_vfe_cfg_cmd2 {