Merge "msm: ais: Move wait for early camera handoff"

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

@@ -23,6 +23,7 @@
 #include "cam_smmu_api.h"
 #define CREATE_TRACE_POINTS
 #include "trace/events/msm_cam.h"
+#include "sensor/cci/msm_early_cam.h"
 
 #define MAX_ISP_V4l2_EVENTS 100
 #define MAX_ISP_REG_LIST 100
@@ -2290,6 +2291,9 @@ int msm_isp_open_node(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 	vfe_dev->isp_raw1_debug = 0;
 	vfe_dev->isp_raw2_debug = 0;
 
+	/* Postpone hardware changes until early camera is complete */
+	msm_early_camera_wait();
+
 	if (vfe_dev->hw_info->vfe_ops.core_ops.init_hw(vfe_dev) < 0) {
 		pr_err("%s: init hardware failed\n", __func__);
 		vfe_dev->vfe_open_cnt--;
@@ -2302,7 +2306,6 @@ int msm_isp_open_node(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 	atomic_set(&vfe_dev->error_info.overflow_state, NO_OVERFLOW);
 
 	vfe_dev->hw_info->vfe_ops.core_ops.clear_status_reg(vfe_dev);
-
 	vfe_dev->vfe_hw_version = msm_camera_io_r(vfe_dev->vfe_base);
 	ISP_DBG("%s: HW Version: 0x%x\n", __func__, vfe_dev->vfe_hw_version);
 	rc = vfe_dev->hw_info->vfe_ops.core_ops.reset_hw(vfe_dev, 1, 1);

drivers/media/platform/msm/ais/sensor/cci/msm_early_cam.c

@@ -17,6 +17,7 @@
 #include <linux/of.h>
 #include <linux/of_gpio.h>
 #include <linux/of_platform.h>
+#include <linux/iopoll.h>
 #include "msm_sd.h"
 #include "msm_early_cam.h"
 #include "msm_cam_cci_hwreg.h"
@@ -38,6 +39,12 @@
 static struct platform_driver msm_early_camera_driver;
 static struct early_cam_device *new_early_cam_dev;
 
+#define MMSS_A_VFE_0_BASE 0x00A10000
+#define MMSS_A_VFE_0_SIZE 0x1000
+#define EARLY_CAMERA_SIGNAL_DONE 0xa5a5a5a5
+#define EARLY_CAMERA_SIGNAL_DISABLED 0
+#define MMSS_A_VFE_0_SPARE 0xC84
+
 int msm_early_cam_disable_clocks(void)
 {
 	int rc = 0;
@@ -253,6 +260,19 @@ int msm_ais_disable_clocks(void)
 	return 0;
 
 }
+
+void msm_early_camera_wait(void)
+{
+	u32 val = 0;
+	void __iomem *base;
+
+	base = ioremap(MMSS_A_VFE_0_BASE, MMSS_A_VFE_0_SIZE);
+	readl_poll_timeout(base + MMSS_A_VFE_0_SPARE, val,
+		((val == EARLY_CAMERA_SIGNAL_DONE)
+		|| (val == EARLY_CAMERA_SIGNAL_DISABLED)), 0, 0);
+	iounmap(base);
+}
+
 static int msm_early_cam_probe(struct platform_device *pdev)
 {
 	int rc = 0;

drivers/media/platform/msm/ais/sensor/cci/msm_early_cam.h

@@ -53,4 +53,5 @@ struct early_cam_device {
 int msm_early_cam_disable_clocks(void);
 int msm_ais_enable_clocks(void);
 int msm_ais_disable_clocks(void);
+void msm_early_camera_wait(void);
 #endif

drivers/media/platform/msm/ais/sensor/msm_sensor_init.c

@@ -1,4 +1,4 @@
-/* Copyright (c) 2013-2017, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -23,9 +23,6 @@
 #undef CDBG
 #define CDBG(fmt, args...) pr_debug(fmt, ##args)
 
-#define EARLY_CAMERA_SIGNAL_DONE 0xa5a5a5a5
-#define EARLY_CAMERA_SIGNAL_DISABLED 0
-
 static bool early_camera_clock_off;
 static struct msm_sensor_init_t *s_init;
 
@@ -48,14 +45,10 @@ static int msm_sensor_wait_for_probe_done(struct msm_sensor_init_t *s_init)
 	return rc;
 }
 
-#define MMSS_A_VFE_0_SPARE 0xC84
-
 /* Static function definition */
 int32_t msm_sensor_driver_cmd(struct msm_sensor_init_t *s_init, void *arg)
 {
 	int32_t                      rc = 0;
-	u32 val = 0;
-	void __iomem *base;
 	struct sensor_init_cfg_data *cfg = (struct sensor_init_cfg_data *)arg;
 
 	/* Validate input parameters */
@@ -64,6 +57,8 @@ int32_t msm_sensor_driver_cmd(struct msm_sensor_init_t *s_init, void *arg)
 		return -EINVAL;
 	}
 
+	/* Postpone hardware changes until early camera is complete */
+	msm_early_camera_wait();
 	pr_debug("%s : %d", __func__, cfg->cfgtype);
 	switch (cfg->cfgtype) {
 	case CFG_SINIT_PROBE:
@@ -79,17 +74,7 @@ int32_t msm_sensor_driver_cmd(struct msm_sensor_init_t *s_init, void *arg)
 
 	case CFG_SINIT_PROBE_DONE:
 		if (early_camera_clock_off == false) {
-			base = ioremap(0x00A10000, 0x1000);
+			msm_early_camera_wait();
-			val = msm_camera_io_r_mb(base + MMSS_A_VFE_0_SPARE);
-			while (val != EARLY_CAMERA_SIGNAL_DONE) {
-				if (val == EARLY_CAMERA_SIGNAL_DISABLED)
-					break;
-				msleep(1000);
-				val = msm_camera_io_r_mb(
-					base + MMSS_A_VFE_0_SPARE);
-				pr_err("Waiting for signal from LK val = %u\n",
-					val);
-			}
 			rc = msm_early_cam_disable_clocks();
 			if (rc < 0) {
 				pr_err("Failed to disable early camera :%d\n",