msm: camera: isp: Allow lite IPP to use RDI state machine

Since lite IPP doesn't have an epoch irq and it's primary function is to
preprocess the raw input, it should use the RDI state machine.

This change also adds a warning if the CAN_USE_LITE flag is used
incorrectly by the userspace.

CRs-Fixed: 2846451
Change-Id: Iff2b9bda677105181bdfcea20090881934528f73
Signed-off-by: Anand Ravi <[email protected]>

drivers/cam_isp/isp_hw_mgr/cam_ife_hw_mgr.c

@@ -3452,8 +3452,11 @@ static int cam_ife_hw_mgr_preprocess_port(
 
 	for (i = 0; i < in_port->num_out_res; i++) {
 		out_port = &in_port->data[i];
-		if (cam_ife_hw_mgr_is_rdi_res(out_port->res_type) ||
-			cam_ife_hw_mgr_is_sfe_rdi_res(out_port->res_type))
+		if (cam_ife_hw_mgr_is_rdi_res(out_port->res_type)) {
+			in_port->rdi_count++;
+			in_port->lite_path_count++;
+		}
+		else if (cam_ife_hw_mgr_is_sfe_rdi_res(out_port->res_type))
 			in_port->rdi_count++;
 		else if (out_port->res_type == CAM_ISP_IFE_OUT_RES_2PD)
 			in_port->ppp_count++;
@@ -3463,6 +3466,17 @@ static int cam_ife_hw_mgr_preprocess_port(
 			CAM_DBG(CAM_ISP, "out_res_type %d",
 			out_port->res_type);
 			in_port->ipp_count++;
+			if (in_port->can_use_lite) {
+				switch(out_port->res_type) {
+				case CAM_ISP_IFE_LITE_OUT_RES_PREPROCESS_RAW:
+				case CAM_ISP_IFE_LITE_OUT_RES_STATS_BG:
+					in_port->lite_path_count++;
+				break;
+				default:
+					CAM_WARN(CAM_ISP, "Output port 0x%x cannot use lite",
+							out_port->res_type);
+				}
+			}
 		}
 	}
 
@@ -4395,6 +4409,7 @@ static int cam_ife_mgr_acquire_hw(void *hw_mgr_priv, void *acquire_hw_args)
 	uint32_t                           total_pix_port = 0;
 	uint32_t                           total_rdi_port = 0;
 	uint32_t                           total_pd_port = 0;
+	uint32_t                           total_lite_port = 0;
 	struct cam_isp_acquire_hw_info    *acquire_hw_info = NULL;
 	uint32_t                           input_size = 0;
 
@@ -4461,6 +4476,7 @@ static int cam_ife_mgr_acquire_hw(void *hw_mgr_priv, void *acquire_hw_args)
 					in_port[i].lcr_count;
 		total_rdi_port += in_port[i].rdi_count;
 		total_pd_port += in_port[i].ppp_count;
+		total_lite_port += in_port[i].lite_path_count;
 	}
 
 	/* Check whether context has only RDI resource */
@@ -4469,6 +4485,11 @@ static int cam_ife_mgr_acquire_hw(void *hw_mgr_priv, void *acquire_hw_args)
 		CAM_DBG(CAM_ISP, "RDI only context");
 	}
 
+	/* Check if all output ports are of lite  */
+	if (total_lite_port == total_pix_port + total_rdi_port) {
+		ife_ctx->is_lite_context = 1;
+	}
+
 	/* acquire HW resources */
 	for (i = 0; i < acquire_hw_info->num_inputs; i++) {
 		CAM_DBG(CAM_ISP, "in_res_type %x", in_port[i].res_type);
@@ -9597,7 +9618,7 @@ static int cam_ife_mgr_cmd(void *hw_mgr_priv, void *cmd_args)
 			else if (ctx->is_fe_enabled && !ctx->is_offline &&
 				ctx->ctx_type != CAM_IFE_CTX_TYPE_SFE)
 				isp_hw_cmd_args->u.ctx_type = CAM_ISP_CTX_FS2;
-			else if (ctx->is_rdi_only_context)
+			else if (ctx->is_rdi_only_context || ctx->is_lite_context)
 				isp_hw_cmd_args->u.ctx_type = CAM_ISP_CTX_RDI;
 			else
 				isp_hw_cmd_args->u.ctx_type = CAM_ISP_CTX_PIX;

drivers/cam_isp/isp_hw_mgr/cam_ife_hw_mgr.h

@@ -143,6 +143,8 @@ struct cam_sfe_scratch_buf_cfg {
  *                          registers
  * @last_cdm_done_req:      Last cdm done request
  * @is_rdi_only_context     flag to specify the context has only rdi resource
+ * @is_lite_context         flag to specify the context has only uses lite
+ *                          resources
  * @config_done_complete    indicator for configuration complete
  * @reg_dump_buf_desc:      cmd buffer descriptors for reg dump
  * @num_reg_dump_buf:       Count of descriptors in reg_dump_buf_desc
@@ -204,6 +206,7 @@ struct cam_ife_hw_mgr_ctx {
 	atomic_t                        cdm_done;
 	uint64_t                        last_cdm_done_req;
 	uint32_t                        is_rdi_only_context;
+	uint32_t                        is_lite_context;
 	struct completion               config_done_complete;
 	uint32_t                        hw_version;
 	struct cam_cmd_buf_desc         reg_dump_buf_desc[

drivers/cam_isp/isp_hw_mgr/isp_hw/include/cam_ife_csid_hw_intf.h

@@ -130,6 +130,7 @@ struct cam_isp_in_port_generic_info {
 	uint32_t                        udi_count;
 	uint32_t                        lcr_count;
 	uint32_t                        ife_rd_count;
+	uint32_t                        lite_path_count;
 	uint32_t                        sfe_in_path_type;
 	uint32_t                        sfe_ife_enable;
 	uint32_t                        secure_mode;