1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2020 NVIDIA CORPORATION. All rights reserved.
9 #include <linux/host1x.h>
10 #include <linux/list.h>
12 #include <linux/mutex.h>
13 #include <linux/spinlock.h>
14 #include <linux/wait.h>
16 #include <media/media-entity.h>
17 #include <media/v4l2-async.h>
18 #include <media/v4l2-ctrls.h>
19 #include <media/v4l2-device.h>
20 #include <media/v4l2-dev.h>
21 #include <media/v4l2-subdev.h>
22 #include <media/videobuf2-v4l2.h>
26 #define V4L2_CID_TEGRA_SYNCPT_TIMEOUT_RETRY (V4L2_CTRL_CLASS_CAMERA | 0x1001)
28 #define TEGRA_MIN_WIDTH 32U
29 #define TEGRA_MAX_WIDTH 32768U
30 #define TEGRA_MIN_HEIGHT 32U
31 #define TEGRA_MAX_HEIGHT 32768U
33 #define TEGRA_DEF_WIDTH 1920
34 #define TEGRA_DEF_HEIGHT 1080
35 #define TEGRA_IMAGE_FORMAT_DEF 32
37 #define MAX_FORMAT_NUM 64
38 #define SURFACE_ALIGN_BYTES 64
40 enum tegra_vi_pg_mode {
41 TEGRA_VI_PG_DISABLED = 0,
47 * struct tegra_vi_ops - Tegra VI operations
48 * @vi_start_streaming: starts media pipeline, subdevice streaming, sets up
49 * VI for capture and runs capture start and capture finish
50 * kthreads for capturing frames to buffer and returns them back.
51 * @vi_stop_streaming: stops media pipeline and subdevice streaming and returns
52 * back any queued buffers.
55 int (*vi_start_streaming)(struct vb2_queue *vq, u32 count);
56 void (*vi_stop_streaming)(struct vb2_queue *vq);
60 * struct tegra_vi_soc - NVIDIA Tegra Video Input SoC structure
62 * @video_formats: supported video formats
63 * @nformats: total video formats
65 * @hw_revision: VI hw_revision
66 * @vi_max_channels: supported max streaming channels
67 * @vi_max_clk_hz: VI clock max frequency
70 const struct tegra_video_format *video_formats;
71 const unsigned int nformats;
72 const struct tegra_vi_ops *ops;
74 unsigned int vi_max_channels;
75 unsigned int vi_max_clk_hz;
79 * struct tegra_vi - NVIDIA Tegra Video Input device structure
82 * @client: host1x_client struct
83 * @iomem: register base
84 * @clk: main clock for VI block
85 * @vdd: vdd regulator for VI hardware, normally it is avdd_dsi_csi
86 * @soc: pointer to SoC data structure
88 * @vi_chans: list head for VI channels
92 struct host1x_client client;
95 struct regulator *vdd;
96 const struct tegra_vi_soc *soc;
97 const struct tegra_vi_ops *ops;
98 struct list_head vi_chans;
102 * struct tegra_vi_graph_entity - Entity in the video graph
104 * @asd: subdev asynchronous registration information
105 * @entity: media entity from the corresponding V4L2 subdev
106 * @subdev: V4L2 subdev
108 struct tegra_vi_graph_entity {
109 struct v4l2_async_subdev asd;
110 struct media_entity *entity;
111 struct v4l2_subdev *subdev;
115 * struct tegra_vi_channel - Tegra video channel
117 * @list: list head for this entry
118 * @video: V4L2 video device associated with the video channel
119 * @video_lock: protects the @format and @queue fields
120 * @pad: media pad for the video device entity
122 * @vi: Tegra video input device structure
123 * @frame_start_sp: host1x syncpoint pointer to synchronize programmed capture
124 * start condition with hardware frame start events through host1x
125 * syncpoint counters.
126 * @mw_ack_sp: host1x syncpoint pointer to synchronize programmed memory write
127 * ack trigger condition with hardware memory write done at end of
128 * frame through host1x syncpoint counters.
129 * @sp_incr_lock: protects cpu syncpoint increment.
131 * @kthread_start_capture: kthread to start capture of single frame when
132 * vb buffer is available. This thread programs VI CSI hardware
133 * for single frame capture and waits for frame start event from
134 * the hardware. On receiving frame start event, it wakes up
135 * kthread_finish_capture thread to wait for finishing frame data
136 * write to the memory. In case of missing frame start event, this
137 * thread returns buffer back to vb with VB2_BUF_STATE_ERROR.
138 * @start_wait: waitqueue for starting frame capture when buffer is available.
139 * @kthread_finish_capture: kthread to finish the buffer capture and return to.
140 * This thread is woken up by kthread_start_capture on receiving
141 * frame start event from the hardware and this thread waits for
142 * MW_ACK_DONE event which indicates completion of writing frame
143 * data to the memory. On receiving MW_ACK_DONE event, buffer is
144 * returned back to vb with VB2_BUF_STATE_DONE and in case of
145 * missing MW_ACK_DONE event, buffer is returned back to vb with
146 * VB2_BUF_STATE_ERROR.
147 * @done_wait: waitqueue for finishing capture data writes to memory.
149 * @format: active V4L2 pixel format
150 * @fmtinfo: format information corresponding to the active @format
151 * @queue: vb2 buffers queue
152 * @sequence: V4L2 buffers sequence number
154 * @capture: list of queued buffers for capture
155 * @start_lock: protects the capture queued list
156 * @done: list of capture done queued buffers
157 * @done_lock: protects the capture done queue list
159 * @portnos: VI channel port numbers
160 * @totalports: total number of ports used for this channel
161 * @numgangports: number of ports combined together as a gang for capture
162 * @of_node: device node of VI channel
164 * @ctrl_handler: V4L2 control handler of this video channel
165 * @syncpt_timeout_retry: syncpt timeout retry count for the capture
166 * @fmts_bitmap: a bitmap for supported formats matching v4l2 subdev formats
167 * @tpg_fmts_bitmap: a bitmap for supported TPG formats
168 * @pg_mode: test pattern generator mode (disabled/direct/patch)
169 * @notifier: V4L2 asynchronous subdevs notifier
171 struct tegra_vi_channel {
172 struct list_head list;
173 struct video_device video;
174 /* protects the @format and @queue fields */
175 struct mutex video_lock;
176 struct media_pad pad;
179 struct host1x_syncpt *frame_start_sp[GANG_PORTS_MAX];
180 struct host1x_syncpt *mw_ack_sp[GANG_PORTS_MAX];
181 /* protects the cpu syncpoint increment */
182 spinlock_t sp_incr_lock[GANG_PORTS_MAX];
184 struct task_struct *kthread_start_capture;
185 wait_queue_head_t start_wait;
186 struct task_struct *kthread_finish_capture;
187 wait_queue_head_t done_wait;
189 struct v4l2_pix_format format;
190 const struct tegra_video_format *fmtinfo;
191 struct vb2_queue queue;
194 struct list_head capture;
195 /* protects the capture queued list */
196 spinlock_t start_lock;
197 struct list_head done;
198 /* protects the capture done queue list */
199 spinlock_t done_lock;
201 unsigned char portnos[GANG_PORTS_MAX];
204 struct device_node *of_node;
206 struct v4l2_ctrl_handler ctrl_handler;
207 unsigned int syncpt_timeout_retry;
208 DECLARE_BITMAP(fmts_bitmap, MAX_FORMAT_NUM);
209 DECLARE_BITMAP(tpg_fmts_bitmap, MAX_FORMAT_NUM);
210 enum tegra_vi_pg_mode pg_mode;
212 struct v4l2_async_notifier notifier;
216 * struct tegra_channel_buffer - video channel buffer
218 * @buf: vb2 buffer base object
219 * @queue: buffer list entry in the channel queued buffers list
220 * @chan: channel that uses the buffer
221 * @addr: Tegra IOVA buffer address for VI output
222 * @mw_ack_sp_thresh: MW_ACK_DONE syncpoint threshold corresponding
223 * to the capture buffer.
225 struct tegra_channel_buffer {
226 struct vb2_v4l2_buffer buf;
227 struct list_head queue;
228 struct tegra_vi_channel *chan;
230 u32 mw_ack_sp_thresh[GANG_PORTS_MAX];
234 * VI channel input data type enum.
235 * These data type enum value gets programmed into corresponding Tegra VI
236 * channel register bits.
238 enum tegra_image_dt {
239 TEGRA_IMAGE_DT_YUV420_8 = 24,
240 TEGRA_IMAGE_DT_YUV420_10,
242 TEGRA_IMAGE_DT_YUV420CSPS_8 = 28,
243 TEGRA_IMAGE_DT_YUV420CSPS_10,
244 TEGRA_IMAGE_DT_YUV422_8,
245 TEGRA_IMAGE_DT_YUV422_10,
246 TEGRA_IMAGE_DT_RGB444,
247 TEGRA_IMAGE_DT_RGB555,
248 TEGRA_IMAGE_DT_RGB565,
249 TEGRA_IMAGE_DT_RGB666,
250 TEGRA_IMAGE_DT_RGB888,
252 TEGRA_IMAGE_DT_RAW6 = 40,
255 TEGRA_IMAGE_DT_RAW10,
256 TEGRA_IMAGE_DT_RAW12,
257 TEGRA_IMAGE_DT_RAW14,
261 * struct tegra_video_format - Tegra video format description
263 * @img_dt: image data type
264 * @bit_width: format width in bits per component
265 * @code: media bus format code
266 * @bpp: bytes per pixel (when stored in memory)
267 * @img_fmt: image format
268 * @fourcc: V4L2 pixel format FCC identifier
270 struct tegra_video_format {
271 enum tegra_image_dt img_dt;
272 unsigned int bit_width;
279 #if defined(CONFIG_ARCH_TEGRA_210_SOC)
280 extern const struct tegra_vi_soc tegra210_vi_soc;
284 tegra_channel_get_remote_csi_subdev(struct tegra_vi_channel *chan);
286 tegra_channel_get_remote_source_subdev(struct tegra_vi_channel *chan);
287 int tegra_channel_set_stream(struct tegra_vi_channel *chan, bool on);
288 void tegra_channel_release_buffers(struct tegra_vi_channel *chan,
289 enum vb2_buffer_state state);
290 void tegra_channels_cleanup(struct tegra_vi *vi);