msm: camera: isp: Implement new ioctl

Implement a new ioctl that sets the ahb clock vote. This can be
used from user space to make register programming quicker.

CRs-Fixed: 1001335
Change-Id: I1bc0253ada50040d55b57f0ed07ba66b5535106a
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>

drivers/media/platform/msm/camera_v2/common/cam_hw_ops.h

@@ -39,4 +39,4 @@ enum cam_ahb_clk_client {
 int cam_config_ahb_clk(struct device *dev, unsigned long freq,
 	enum cam_ahb_clk_client id, enum cam_ahb_clk_vote vote);
 int cam_ahb_clk_init(struct platform_device *pdev);
-#endif /* _CAM_HW_OPS_H_ */
+#endif

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

@@ -28,6 +28,7 @@
 #include <linux/msm-bus-board.h>
 
 #include "msm_buf_mgr.h"
+#include "cam_hw_ops.h"
 
 #define VFE40_8974V1_VERSION 0x10000018
 #define VFE40_8974V2_VERSION 0x1001001A
@@ -239,6 +240,8 @@ struct msm_vfe_core_ops {
 	void (*get_rdi_wm_mask)(struct vfe_device *vfe_dev,
 		uint32_t *rdi_wm_mask);
 	bool (*is_module_cfg_lock_needed)(uint32_t reg_offset);
+	int (*ahb_clk_cfg)(struct vfe_device *vfe_dev,
+			struct msm_isp_ahb_clk_cfg *ahb_cfg);
 };
 struct msm_vfe_stats_ops {
 	int (*get_stats_idx)(enum msm_isp_stats_type stats_type);
@@ -703,6 +706,7 @@ struct vfe_device {
 	uint32_t **vfe_clk_rates;
 	size_t num_clk;
 	size_t num_rates;
+	enum cam_ahb_clk_vote ahb_vote;
 
 	/* Sync variables*/
 	struct completion reset_complete;

drivers/media/platform/msm/camera_v2/isp/msm_isp32.c

@@ -1514,6 +1514,7 @@ struct msm_vfe_hardware_info vfe32_hw_info = {
 			.get_overflow_mask = msm_vfe32_get_overflow_mask,
 			.is_module_cfg_lock_needed =
 				msm_vfe32_is_module_cfg_lock_needed,
+			.ahb_clk_cfg = NULL,
 		},
 		.stats_ops = {
 			.get_stats_idx = msm_vfe32_get_stats_idx,

drivers/media/platform/msm/camera_v2/isp/msm_isp40.c

@@ -2256,6 +2256,7 @@ struct msm_vfe_hardware_info vfe40_hw_info = {
 			.process_error_status = msm_vfe40_process_error_status,
 			.is_module_cfg_lock_needed =
 				msm_vfe40_is_module_cfg_lock_needed,
+			.ahb_clk_cfg = NULL,
 		},
 		.stats_ops = {
 			.get_stats_idx = msm_vfe40_get_stats_idx,

drivers/media/platform/msm/camera_v2/isp/msm_isp44.c

@@ -1906,6 +1906,7 @@ struct msm_vfe_hardware_info vfe44_hw_info = {
 			.process_error_status = msm_vfe44_process_error_status,
 			.is_module_cfg_lock_needed =
 				msm_vfe44_is_module_cfg_lock_needed,
+			.ahb_clk_cfg = NULL,
 		},
 		.stats_ops = {
 			.get_stats_idx = msm_vfe44_get_stats_idx,

drivers/media/platform/msm/camera_v2/isp/msm_isp46.c

@@ -2001,6 +2001,7 @@ struct msm_vfe_hardware_info vfe46_hw_info = {
 			.process_error_status = msm_vfe46_process_error_status,
 			.is_module_cfg_lock_needed =
 				msm_vfe46_is_module_cfg_lock_needed,
+			.ahb_clk_cfg = NULL,
 		},
 		.stats_ops = {
 			.get_stats_idx = msm_vfe46_get_stats_idx,

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

@@ -238,6 +238,43 @@ static int32_t msm_vfe47_init_dt_parms(struct vfe_device *vfe_dev,
 	return 0;
 }
 
+static enum cam_ahb_clk_vote msm_isp47_get_cam_clk_vote(
+	 enum msm_vfe_ahb_clk_vote vote)
+{
+	switch (vote) {
+	case MSM_ISP_CAMERA_AHB_SVS_VOTE:
+		return CAM_AHB_SVS_VOTE;
+	case MSM_ISP_CAMERA_AHB_TURBO_VOTE:
+		return CAM_AHB_TURBO_VOTE;
+	case MSM_ISP_CAMERA_AHB_NOMINAL_VOTE:
+		return CAM_AHB_NOMINAL_VOTE;
+	case MSM_ISP_CAMERA_AHB_SUSPEND_VOTE:
+		return CAM_AHB_SUSPEND_VOTE;
+	}
+	return 0;
+}
+
+static int msm_isp47_ahb_clk_cfg(struct vfe_device *vfe_dev,
+			struct msm_isp_ahb_clk_cfg *ahb_cfg)
+{
+	int rc = 0;
+	enum cam_ahb_clk_vote vote;
+
+	vote = msm_isp47_get_cam_clk_vote(ahb_cfg->vote);
+
+	if (vote && vfe_dev->ahb_vote != vote) {
+		rc = cam_config_ahb_clk(NULL, 0,
+			(vfe_dev->pdev->id  == ISP_VFE0 ?
+			CAM_AHB_CLIENT_VFE0 : CAM_AHB_CLIENT_VFE1), vote);
+		if (rc)
+			pr_err("%s: failed to set ahb vote to %x\n",
+				__func__, vote);
+		else
+			vfe_dev->ahb_vote = vote;
+	}
+	return rc;
+}
+
 int msm_vfe47_init_hardware(struct vfe_device *vfe_dev)
 {
 	int rc = -1;
@@ -253,6 +290,7 @@ int msm_vfe47_init_hardware(struct vfe_device *vfe_dev)
 		pr_err("%s: failed to vote for AHB\n", __func__);
 		goto ahb_vote_fail;
 	}
+	vfe_dev->ahb_vote = CAM_AHB_SVS_VOTE;
 
 	rc = vfe_dev->hw_info->vfe_ops.platform_ops.enable_regulators(
 								vfe_dev, 1);
@@ -280,6 +318,7 @@ clk_enable_failed:
 enable_regulators_failed:
 	if (cam_config_ahb_clk(NULL, 0, id, CAM_AHB_SUSPEND_VOTE) < 0)
 		pr_err("%s: failed to remove vote for AHB\n", __func__);
+	vfe_dev->ahb_vote = CAM_AHB_SUSPEND_VOTE;
 ahb_vote_fail:
 	return rc;
 }
@@ -312,6 +351,7 @@ void msm_vfe47_release_hardware(struct vfe_device *vfe_dev)
 
 	if (cam_config_ahb_clk(NULL, 0, id, CAM_AHB_SUSPEND_VOTE) < 0)
 		pr_err("%s: failed to vote for AHB\n", __func__);
+	 vfe_dev->ahb_vote = CAM_AHB_SUSPEND_VOTE;
 }
 
 void msm_vfe47_init_hardware_reg(struct vfe_device *vfe_dev)
@@ -2637,6 +2677,7 @@ struct msm_vfe_hardware_info vfe47_hw_info = {
 			.process_error_status = msm_vfe47_process_error_status,
 			.is_module_cfg_lock_needed =
 				msm_vfe47_is_module_cfg_lock_needed,
+			.ahb_clk_cfg = msm_isp47_ahb_clk_cfg,
 		},
 		.stats_ops = {
 			.get_stats_idx = msm_vfe47_get_stats_idx,

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

@@ -701,7 +701,6 @@ static int msm_isp_proc_cmd_list(struct vfe_device *vfe_dev, void *arg)
 }
 #endif /* CONFIG_COMPAT */
 
-
 static long msm_isp_ioctl_unlocked(struct v4l2_subdev *sd,
 	unsigned int cmd, void *arg)
 {
@@ -814,6 +813,15 @@ static long msm_isp_ioctl_unlocked(struct v4l2_subdev *sd,
 		rc = msm_isp_cfg_input(vfe_dev, arg);
 		mutex_unlock(&vfe_dev->core_mutex);
 		break;
+	case VIDIOC_MSM_ISP_AHB_CLK_CFG:
+		mutex_lock(&vfe_dev->core_mutex);
+		if (vfe_dev->hw_info->vfe_ops.core_ops.ahb_clk_cfg)
+			rc = vfe_dev->hw_info->vfe_ops.core_ops.
+					ahb_clk_cfg(vfe_dev, arg);
+		else
+			rc = -EOPNOTSUPP;
+		mutex_unlock(&vfe_dev->core_mutex);
+		break;
 	case VIDIOC_MSM_ISP_SET_DUAL_HW_MASTER_SLAVE:
 		mutex_lock(&vfe_dev->core_mutex);
 		rc = msm_isp_set_dual_HW_master_slave_mode(vfe_dev, arg);

include/uapi/media/msmb_isp.h

@@ -756,6 +756,18 @@ struct msm_isp_event_data {
 	} u; /* union can have max 52 bytes */
 };
 
+enum msm_vfe_ahb_clk_vote {
+	MSM_ISP_CAMERA_AHB_SVS_VOTE = 1,
+	MSM_ISP_CAMERA_AHB_TURBO_VOTE = 2,
+	MSM_ISP_CAMERA_AHB_NOMINAL_VOTE = 3,
+	MSM_ISP_CAMERA_AHB_SUSPEND_VOTE = 4,
+};
+
+struct msm_isp_ahb_clk_cfg {
+	uint32_t vote;
+	uint32_t reserved[2];
+};
+
 #define V4L2_PIX_FMT_QBGGR8  v4l2_fourcc('Q', 'B', 'G', '8')
 #define V4L2_PIX_FMT_QGBRG8  v4l2_fourcc('Q', 'G', 'B', '8')
 #define V4L2_PIX_FMT_QGRBG8  v4l2_fourcc('Q', 'G', 'R', '8')
@@ -861,4 +873,7 @@ struct msm_isp_event_data {
 #define VIDIOC_MSM_ISP_UNMAP_BUF \
 	_IOWR('V', BASE_VIDIOC_PRIVATE+24, struct msm_isp_unmap_buf_req)
 
+#define VIDIOC_MSM_ISP_AHB_CLK_CFG \
+	_IOWR('V', BASE_VIDIOC_PRIVATE+25, struct msm_isp_ahb_clk_cfg)
+
 #endif /* __MSMB_ISP__ */