1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Driver for Renesas R-Car VIN
5 * Copyright (C) 2016 Renesas Electronics Corp.
6 * Copyright (C) 2011-2013 Renesas Solutions Corp.
7 * Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com>
8 * Copyright (C) 2008 Magnus Damm
10 * Based on the soc-camera rcar_vin driver
16 #include <linux/kref.h>
18 #include <media/v4l2-async.h>
19 #include <media/v4l2-ctrls.h>
20 #include <media/v4l2-dev.h>
21 #include <media/v4l2-device.h>
22 #include <media/videobuf2-v4l2.h>
24 /* Number of HW buffers */
25 #define HW_BUFFER_NUM 3
27 /* Address alignment mask for HW buffers */
28 #define HW_BUFFER_MASK 0x7f
30 /* Max number on VIN instances that can be in a system */
31 #define RCAR_VIN_NUM 8
51 * STOPPED - No operation in progress
52 * STARTING - Capture starting up
53 * RUNNING - Operation in progress have buffers
54 * STOPPING - Stopping operation
64 * enum rvin_buffer_type
66 * Describes how a buffer is given to the hardware. To be able
67 * to capture SEQ_TB/BT it's needed to capture to the same vb2
68 * buffer twice so the type of buffer needs to be kept.
70 * FULL - One capture fills the whole vb2 buffer
71 * HALF_TOP - One capture fills the top half of the vb2 buffer
72 * HALF_BOTTOM - One capture fills the bottom half of the vb2 buffer
74 enum rvin_buffer_type {
81 * struct rvin_video_format - Data format stored in memory
82 * @fourcc: Pixelformat
83 * @bpp: Bytes per pixel
85 struct rvin_video_format {
91 * struct rvin_parallel_entity - Parallel video input endpoint descriptor
92 * @asd: sub-device descriptor for async framework
93 * @subdev: subdevice matched using async framework
94 * @mbus_type: media bus type
95 * @mbus_flags: media bus configuration flags
96 * @source_pad: source pad of remote subdevice
97 * @sink_pad: sink pad of remote subdevice
100 struct rvin_parallel_entity {
101 struct v4l2_async_subdev asd;
102 struct v4l2_subdev *subdev;
104 enum v4l2_mbus_type mbus_type;
105 unsigned int mbus_flags;
107 unsigned int source_pad;
108 unsigned int sink_pad;
112 * struct rvin_group_route - describes a route from a channel of a
113 * CSI-2 receiver to a VIN
115 * @csi: CSI-2 receiver ID.
116 * @channel: Output channel of the CSI-2 receiver.
118 * @mask: Bitmask of the different CHSEL register values that
119 * allow for a route from @csi + @chan to @vin.
122 * Each R-Car CSI-2 receiver has four output channels facing the VIN
123 * devices, each channel can carry one CSI-2 Virtual Channel (VC).
124 * There is no correlation between channel number and CSI-2 VC. It's
125 * up to the CSI-2 receiver driver to configure which VC is output
126 * on which channel, the VIN devices only care about output channels.
128 * There are in some cases multiple CHSEL register settings which would
129 * allow for the same route from @csi + @channel to @vin. For example
130 * on R-Car H3 both the CHSEL values 0 and 3 allow for a route from
131 * CSI40/VC0 to VIN0. All possible CHSEL values for a route need to be
132 * recorded as a bitmask in @mask, in this example bit 0 and 3 should
135 struct rvin_group_route {
136 enum rvin_csi_id csi;
137 unsigned int channel;
143 * struct rvin_info - Information about the particular VIN implementation
145 * @use_mc: use media controller instead of controlling subdevice
146 * @nv12: support outputing NV12 pixel format
147 * @max_width: max input width the VIN supports
148 * @max_height: max input height the VIN supports
149 * @routes: list of possible routes from the CSI-2 recivers to
150 * all VINs. The list mush be NULL terminated.
157 unsigned int max_width;
158 unsigned int max_height;
159 const struct rvin_group_route *routes;
163 * struct rvin_dev - Renesas VIN device structure
165 * @base: device I/O register space remapped to virtual memory
166 * @info: info about VIN instance
168 * @vdev: V4L2 video device associated with VIN
169 * @v4l2_dev: V4L2 device
170 * @ctrl_handler: V4L2 control handler
171 * @notifier: V4L2 asynchronous subdevs notifier
173 * @parallel: parallel input subdevice descriptor
175 * @group: Gen3 CSI group
176 * @id: Gen3 group id for this VIN
177 * @pad: media pad for the video device entity
179 * @lock: protects @queue
180 * @queue: vb2 buffers queue
181 * @scratch: cpu address for scratch buffer
182 * @scratch_phys: physical address of the scratch buffer
184 * @qlock: protects @buf_hw, @buf_list, @sequence and @state
185 * @buf_hw: Keeps track of buffers given to HW slot
186 * @buf_list: list of queued buffers
187 * @sequence: V4L2 buffers sequence number
188 * @state: keeps track of operation state
190 * @is_csi: flag to mark the VIN as using a CSI-2 subdevice
192 * @mbus_code: media bus format code
193 * @format: active V4L2 pixel format
195 * @crop: active cropping
196 * @compose: active composing
197 * @src_rect: active size of the video source
198 * @std: active video standard of the video source
200 * @alpha: Alpha component to fill in for supported pixel formats
205 const struct rvin_info *info;
207 struct video_device vdev;
208 struct v4l2_device v4l2_dev;
209 struct v4l2_ctrl_handler ctrl_handler;
210 struct v4l2_async_notifier notifier;
212 struct rvin_parallel_entity *parallel;
214 struct rvin_group *group;
216 struct media_pad pad;
219 struct vb2_queue queue;
221 dma_addr_t scratch_phys;
225 struct vb2_v4l2_buffer *buffer;
226 enum rvin_buffer_type type;
228 } buf_hw[HW_BUFFER_NUM];
229 struct list_head buf_list;
230 unsigned int sequence;
231 enum rvin_dma_state state;
236 struct v4l2_pix_format format;
238 struct v4l2_rect crop;
239 struct v4l2_rect compose;
240 struct v4l2_rect src_rect;
246 #define vin_to_source(vin) ((vin)->parallel->subdev)
249 #define vin_dbg(d, fmt, arg...) dev_dbg(d->dev, fmt, ##arg)
250 #define vin_info(d, fmt, arg...) dev_info(d->dev, fmt, ##arg)
251 #define vin_warn(d, fmt, arg...) dev_warn(d->dev, fmt, ##arg)
252 #define vin_err(d, fmt, arg...) dev_err(d->dev, fmt, ##arg)
255 * struct rvin_group - VIN CSI2 group information
256 * @refcount: number of VIN instances using the group
258 * @mdev: media device which represents the group
260 * @lock: protects the count, notifier, vin and csi members
261 * @count: number of enabled VIN instances found in DT
262 * @notifier: group notifier for CSI-2 async subdevices
263 * @vin: VIN instances which are part of the group
264 * @csi: array of pairs of fwnode and subdev pointers
265 * to all CSI-2 subdevices.
268 struct kref refcount;
270 struct media_device mdev;
274 struct v4l2_async_notifier notifier;
275 struct rvin_dev *vin[RCAR_VIN_NUM];
278 struct fwnode_handle *fwnode;
279 struct v4l2_subdev *subdev;
283 int rvin_dma_register(struct rvin_dev *vin, int irq);
284 void rvin_dma_unregister(struct rvin_dev *vin);
286 int rvin_v4l2_register(struct rvin_dev *vin);
287 void rvin_v4l2_unregister(struct rvin_dev *vin);
289 const struct rvin_video_format *rvin_format_from_pixel(struct rvin_dev *vin,
293 /* Cropping, composing and scaling */
294 void rvin_crop_scale_comp(struct rvin_dev *vin);
296 int rvin_set_channel_routing(struct rvin_dev *vin, u8 chsel);
297 void rvin_set_alpha(struct rvin_dev *vin, unsigned int alpha);