1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * vsp1_histo.h -- R-Car VSP1 Histogram API 4 * 5 * Copyright (C) 2016 Renesas Electronics Corporation 6 * Copyright (C) 2016 Laurent Pinchart 7 * 8 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) 9 */ 10 #ifndef __VSP1_HISTO_H__ 11 #define __VSP1_HISTO_H__ 12 13 #include <linux/list.h> 14 #include <linux/mutex.h> 15 #include <linux/spinlock.h> 16 17 #include <media/media-entity.h> 18 #include <media/v4l2-dev.h> 19 #include <media/videobuf2-v4l2.h> 20 21 #include "vsp1_entity.h" 22 23 struct vsp1_device; 24 25 #define HISTO_PAD_SINK 0 26 #define HISTO_PAD_SOURCE 1 27 28 struct vsp1_histogram_buffer { 29 struct vb2_v4l2_buffer buf; 30 struct list_head queue; 31 void *addr; 32 }; 33 34 struct vsp1_histogram { 35 struct vsp1_entity entity; 36 struct video_device video; 37 struct media_pad pad; 38 39 const u32 *formats; 40 unsigned int num_formats; 41 size_t data_size; 42 u32 meta_format; 43 44 struct mutex lock; 45 struct vb2_queue queue; 46 47 spinlock_t irqlock; 48 struct list_head irqqueue; 49 50 wait_queue_head_t wait_queue; 51 bool readout; 52 }; 53 54 static inline struct vsp1_histogram *vdev_to_histo(struct video_device *vdev) 55 { 56 return container_of(vdev, struct vsp1_histogram, video); 57 } 58 59 static inline struct vsp1_histogram *subdev_to_histo(struct v4l2_subdev *subdev) 60 { 61 return container_of(subdev, struct vsp1_histogram, entity.subdev); 62 } 63 64 int vsp1_histogram_init(struct vsp1_device *vsp1, struct vsp1_histogram *histo, 65 enum vsp1_entity_type type, const char *name, 66 const struct vsp1_entity_operations *ops, 67 const unsigned int *formats, unsigned int num_formats, 68 size_t data_size, u32 meta_format); 69 void vsp1_histogram_destroy(struct vsp1_entity *entity); 70 71 struct vsp1_histogram_buffer * 72 vsp1_histogram_buffer_get(struct vsp1_histogram *histo); 73 void vsp1_histogram_buffer_complete(struct vsp1_histogram *histo, 74 struct vsp1_histogram_buffer *buf, 75 size_t size); 76 77 #endif /* __VSP1_HISTO_H__ */ 78