1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Hantro VPU codec driver
4  *
5  * Copyright 2018 Google LLC.
6  *	Tomasz Figa <tfiga@chromium.org>
7  *
8  * Based on s5p-mfc driver by Samsung Electronics Co., Ltd.
9  * Copyright (C) 2011 Samsung Electronics Co., Ltd.
10  */
11 
12 #ifndef HANTRO_H_
13 #define HANTRO_H_
14 
15 #include <linux/platform_device.h>
16 #include <linux/videodev2.h>
17 #include <linux/wait.h>
18 #include <linux/clk.h>
19 #include <linux/reset.h>
20 
21 #include <media/v4l2-ctrls.h>
22 #include <media/v4l2-device.h>
23 #include <media/v4l2-ioctl.h>
24 #include <media/v4l2-mem2mem.h>
25 #include <media/videobuf2-core.h>
26 #include <media/videobuf2-dma-contig.h>
27 
28 #include "hantro_hw.h"
29 
30 struct hantro_ctx;
31 struct hantro_codec_ops;
32 struct hantro_postproc_ops;
33 
34 #define HANTRO_JPEG_ENCODER	BIT(0)
35 #define HANTRO_ENCODERS		0x0000ffff
36 #define HANTRO_MPEG2_DECODER	BIT(16)
37 #define HANTRO_VP8_DECODER	BIT(17)
38 #define HANTRO_H264_DECODER	BIT(18)
39 #define HANTRO_HEVC_DECODER	BIT(19)
40 #define HANTRO_VP9_DECODER	BIT(20)
41 #define HANTRO_AV1_DECODER	BIT(21)
42 #define HANTRO_DECODERS		0xffff0000
43 
44 /**
45  * struct hantro_irq - irq handler and name
46  *
47  * @name:			irq name for device tree lookup
48  * @handler:			interrupt handler
49  */
50 struct hantro_irq {
51 	const char *name;
52 	irqreturn_t (*handler)(int irq, void *priv);
53 };
54 
55 /**
56  * struct hantro_variant - information about VPU hardware variant
57  *
58  * @enc_offset:			Offset from VPU base to encoder registers.
59  * @dec_offset:			Offset from VPU base to decoder registers.
60  * @enc_fmts:			Encoder formats.
61  * @num_enc_fmts:		Number of encoder formats.
62  * @dec_fmts:			Decoder formats.
63  * @num_dec_fmts:		Number of decoder formats.
64  * @postproc_fmts:		Post-processor formats.
65  * @num_postproc_fmts:		Number of post-processor formats.
66  * @postproc_ops:		Post-processor ops.
67  * @codec:			Supported codecs
68  * @codec_ops:			Codec ops.
69  * @init:			Initialize hardware, optional.
70  * @runtime_resume:		reenable hardware after power gating, optional.
71  * @irqs:			array of irq names and interrupt handlers
72  * @num_irqs:			number of irqs in the array
73  * @clk_names:			array of clock names
74  * @num_clocks:			number of clocks in the array
75  * @reg_names:			array of register range names
76  * @num_regs:			number of register range names in the array
77  * @double_buffer:		core needs double buffering
78  * @legacy_regs:		core uses legacy register set
79  * @late_postproc:		postproc must be set up at the end of the job
80  */
81 struct hantro_variant {
82 	unsigned int enc_offset;
83 	unsigned int dec_offset;
84 	const struct hantro_fmt *enc_fmts;
85 	unsigned int num_enc_fmts;
86 	const struct hantro_fmt *dec_fmts;
87 	unsigned int num_dec_fmts;
88 	const struct hantro_fmt *postproc_fmts;
89 	unsigned int num_postproc_fmts;
90 	const struct hantro_postproc_ops *postproc_ops;
91 	unsigned int codec;
92 	const struct hantro_codec_ops *codec_ops;
93 	int (*init)(struct hantro_dev *vpu);
94 	int (*runtime_resume)(struct hantro_dev *vpu);
95 	const struct hantro_irq *irqs;
96 	int num_irqs;
97 	const char * const *clk_names;
98 	int num_clocks;
99 	const char * const *reg_names;
100 	int num_regs;
101 	unsigned int double_buffer : 1;
102 	unsigned int legacy_regs : 1;
103 	unsigned int late_postproc : 1;
104 };
105 
106 /**
107  * enum hantro_codec_mode - codec operating mode.
108  * @HANTRO_MODE_NONE:  No operating mode. Used for RAW video formats.
109  * @HANTRO_MODE_JPEG_ENC: JPEG encoder.
110  * @HANTRO_MODE_H264_DEC: H264 decoder.
111  * @HANTRO_MODE_MPEG2_DEC: MPEG-2 decoder.
112  * @HANTRO_MODE_VP8_DEC: VP8 decoder.
113  * @HANTRO_MODE_HEVC_DEC: HEVC decoder.
114  * @HANTRO_MODE_VP9_DEC: VP9 decoder.
115  * @HANTRO_MODE_AV1_DEC: AV1 decoder
116  */
117 enum hantro_codec_mode {
118 	HANTRO_MODE_NONE = -1,
119 	HANTRO_MODE_JPEG_ENC,
120 	HANTRO_MODE_H264_DEC,
121 	HANTRO_MODE_MPEG2_DEC,
122 	HANTRO_MODE_VP8_DEC,
123 	HANTRO_MODE_HEVC_DEC,
124 	HANTRO_MODE_VP9_DEC,
125 	HANTRO_MODE_AV1_DEC,
126 };
127 
128 /*
129  * struct hantro_ctrl - helper type to declare supported controls
130  * @codec:	codec id this control belong to (HANTRO_JPEG_ENCODER, etc.)
131  * @cfg:	control configuration
132  */
133 struct hantro_ctrl {
134 	unsigned int codec;
135 	struct v4l2_ctrl_config cfg;
136 };
137 
138 /*
139  * struct hantro_func - Hantro VPU functionality
140  *
141  * @id:			processing functionality ID (can be
142  *			%MEDIA_ENT_F_PROC_VIDEO_ENCODER or
143  *			%MEDIA_ENT_F_PROC_VIDEO_DECODER)
144  * @vdev:		&struct video_device that exposes the encoder or
145  *			decoder functionality
146  * @source_pad:		&struct media_pad with the source pad.
147  * @sink:		&struct media_entity pointer with the sink entity
148  * @sink_pad:		&struct media_pad with the sink pad.
149  * @proc:		&struct media_entity pointer with the M2M device itself.
150  * @proc_pads:		&struct media_pad with the @proc pads.
151  * @intf_devnode:	&struct media_intf devnode pointer with the interface
152  *			with controls the M2M device.
153  *
154  * Contains everything needed to attach the video device to the media device.
155  */
156 struct hantro_func {
157 	unsigned int id;
158 	struct video_device vdev;
159 	struct media_pad source_pad;
160 	struct media_entity sink;
161 	struct media_pad sink_pad;
162 	struct media_entity proc;
163 	struct media_pad proc_pads[2];
164 	struct media_intf_devnode *intf_devnode;
165 };
166 
167 static inline struct hantro_func *
168 hantro_vdev_to_func(struct video_device *vdev)
169 {
170 	return container_of(vdev, struct hantro_func, vdev);
171 }
172 
173 /**
174  * struct hantro_dev - driver data
175  * @v4l2_dev:		V4L2 device to register video devices for.
176  * @m2m_dev:		mem2mem device associated to this device.
177  * @mdev:		media device associated to this device.
178  * @encoder:		encoder functionality.
179  * @decoder:		decoder functionality.
180  * @pdev:		Pointer to VPU platform device.
181  * @dev:		Pointer to device for convenient logging using
182  *			dev_ macros.
183  * @clocks:		Array of clock handles.
184  * @resets:		Array of reset handles.
185  * @reg_bases:		Mapped addresses of VPU registers.
186  * @enc_base:		Mapped address of VPU encoder register for convenience.
187  * @dec_base:		Mapped address of VPU decoder register for convenience.
188  * @ctrl_base:		Mapped address of VPU control block.
189  * @vpu_mutex:		Mutex to synchronize V4L2 calls.
190  * @irqlock:		Spinlock to synchronize access to data structures
191  *			shared with interrupt handlers.
192  * @variant:		Hardware variant-specific parameters.
193  * @watchdog_work:	Delayed work for hardware timeout handling.
194  */
195 struct hantro_dev {
196 	struct v4l2_device v4l2_dev;
197 	struct v4l2_m2m_dev *m2m_dev;
198 	struct media_device mdev;
199 	struct hantro_func *encoder;
200 	struct hantro_func *decoder;
201 	struct platform_device *pdev;
202 	struct device *dev;
203 	struct clk_bulk_data *clocks;
204 	struct reset_control *resets;
205 	void __iomem **reg_bases;
206 	void __iomem *enc_base;
207 	void __iomem *dec_base;
208 	void __iomem *ctrl_base;
209 
210 	struct mutex vpu_mutex;	/* video_device lock */
211 	spinlock_t irqlock;
212 	const struct hantro_variant *variant;
213 	struct delayed_work watchdog_work;
214 };
215 
216 /**
217  * struct hantro_ctx - Context (instance) private data.
218  *
219  * @dev:		VPU driver data to which the context belongs.
220  * @fh:			V4L2 file handler.
221  * @is_encoder:		Decoder or encoder context?
222  *
223  * @sequence_cap:       Sequence counter for capture queue
224  * @sequence_out:       Sequence counter for output queue
225  *
226  * @vpu_src_fmt:	Descriptor of active source format.
227  * @src_fmt:		V4L2 pixel format of active source format.
228  * @vpu_dst_fmt:	Descriptor of active destination format.
229  * @dst_fmt:		V4L2 pixel format of active destination format.
230  *
231  * @ctrl_handler:	Control handler used to register controls.
232  * @jpeg_quality:	User-specified JPEG compression quality.
233  * @bit_depth:		Bit depth of current frame
234  * @need_postproc:	Set to true if the bitstream features require to
235  *			use the post-processor.
236  *
237  * @codec_ops:		Set of operations related to codec mode.
238  * @postproc:		Post-processing context.
239  * @h264_dec:		H.264-decoding context.
240  * @jpeg_enc:		JPEG-encoding context.
241  * @mpeg2_dec:		MPEG-2-decoding context.
242  * @vp8_dec:		VP8-decoding context.
243  * @hevc_dec:		HEVC-decoding context.
244  * @vp9_dec:		VP9-decoding context.
245  * @av1_dec:		AV1-decoding context.
246  */
247 struct hantro_ctx {
248 	struct hantro_dev *dev;
249 	struct v4l2_fh fh;
250 	bool is_encoder;
251 
252 	u32 sequence_cap;
253 	u32 sequence_out;
254 
255 	const struct hantro_fmt *vpu_src_fmt;
256 	struct v4l2_pix_format_mplane src_fmt;
257 	const struct hantro_fmt *vpu_dst_fmt;
258 	struct v4l2_pix_format_mplane dst_fmt;
259 
260 	struct v4l2_ctrl_handler ctrl_handler;
261 	int jpeg_quality;
262 	int bit_depth;
263 
264 	const struct hantro_codec_ops *codec_ops;
265 	struct hantro_postproc_ctx postproc;
266 	bool need_postproc;
267 
268 	/* Specific for particular codec modes. */
269 	union {
270 		struct hantro_h264_dec_hw_ctx h264_dec;
271 		struct hantro_mpeg2_dec_hw_ctx mpeg2_dec;
272 		struct hantro_vp8_dec_hw_ctx vp8_dec;
273 		struct hantro_hevc_dec_hw_ctx hevc_dec;
274 		struct hantro_vp9_dec_hw_ctx vp9_dec;
275 		struct hantro_av1_dec_hw_ctx av1_dec;
276 	};
277 };
278 
279 /**
280  * struct hantro_fmt - information about supported video formats.
281  * @name:	Human readable name of the format.
282  * @fourcc:	FourCC code of the format. See V4L2_PIX_FMT_*.
283  * @codec_mode:	Codec mode related to this format. See
284  *		enum hantro_codec_mode.
285  * @header_size: Optional header size. Currently used by JPEG encoder.
286  * @max_depth:	Maximum depth, for bitstream formats
287  * @enc_fmt:	Format identifier for encoder registers.
288  * @frmsize:	Supported range of frame sizes (only for bitstream formats).
289  * @postprocessed: Indicates if this format needs the post-processor.
290  * @match_depth: Indicates if format bit depth must match video bit depth
291  */
292 struct hantro_fmt {
293 	char *name;
294 	u32 fourcc;
295 	enum hantro_codec_mode codec_mode;
296 	int header_size;
297 	int max_depth;
298 	enum hantro_enc_fmt enc_fmt;
299 	struct v4l2_frmsize_stepwise frmsize;
300 	bool postprocessed;
301 	bool match_depth;
302 };
303 
304 struct hantro_reg {
305 	u32 base;
306 	u32 shift;
307 	u32 mask;
308 };
309 
310 struct hantro_postproc_regs {
311 	struct hantro_reg pipeline_en;
312 	struct hantro_reg max_burst;
313 	struct hantro_reg clk_gate;
314 	struct hantro_reg out_swap32;
315 	struct hantro_reg out_endian;
316 	struct hantro_reg out_luma_base;
317 	struct hantro_reg input_width;
318 	struct hantro_reg input_height;
319 	struct hantro_reg output_width;
320 	struct hantro_reg output_height;
321 	struct hantro_reg input_fmt;
322 	struct hantro_reg output_fmt;
323 	struct hantro_reg orig_width;
324 	struct hantro_reg display_width;
325 };
326 
327 struct hantro_vp9_decoded_buffer_info {
328 	/* Info needed when the decoded frame serves as a reference frame. */
329 	unsigned short width;
330 	unsigned short height;
331 	u32 bit_depth : 4;
332 };
333 
334 struct hantro_decoded_buffer {
335 	/* Must be the first field in this struct. */
336 	struct v4l2_m2m_buffer base;
337 
338 	union {
339 		struct hantro_vp9_decoded_buffer_info vp9;
340 	};
341 };
342 
343 /* Logging helpers */
344 
345 /**
346  * DOC: hantro_debug: Module parameter to control level of debugging messages.
347  *
348  * Level of debugging messages can be controlled by bits of
349  * module parameter called "debug". Meaning of particular
350  * bits is as follows:
351  *
352  * bit 0 - global information: mode, size, init, release
353  * bit 1 - each run start/result information
354  * bit 2 - contents of small controls from userspace
355  * bit 3 - contents of big controls from userspace
356  * bit 4 - detail fmt, ctrl, buffer q/dq information
357  * bit 5 - detail function enter/leave trace information
358  * bit 6 - register write/read information
359  */
360 extern int hantro_debug;
361 
362 #define vpu_debug(level, fmt, args...)				\
363 	do {							\
364 		if (hantro_debug & BIT(level))		\
365 			pr_info("%s:%d: " fmt,	                \
366 				 __func__, __LINE__, ##args);	\
367 	} while (0)
368 
369 #define vpu_err(fmt, args...)					\
370 	pr_err("%s:%d: " fmt, __func__, __LINE__, ##args)
371 
372 /* Structure access helpers. */
373 static __always_inline struct hantro_ctx *fh_to_ctx(struct v4l2_fh *fh)
374 {
375 	return container_of(fh, struct hantro_ctx, fh);
376 }
377 
378 /* Register accessors. */
379 static __always_inline void vepu_write_relaxed(struct hantro_dev *vpu,
380 					       u32 val, u32 reg)
381 {
382 	vpu_debug(6, "0x%04x = 0x%08x\n", reg / 4, val);
383 	writel_relaxed(val, vpu->enc_base + reg);
384 }
385 
386 static __always_inline void vepu_write(struct hantro_dev *vpu, u32 val, u32 reg)
387 {
388 	vpu_debug(6, "0x%04x = 0x%08x\n", reg / 4, val);
389 	writel(val, vpu->enc_base + reg);
390 }
391 
392 static __always_inline u32 vepu_read(struct hantro_dev *vpu, u32 reg)
393 {
394 	u32 val = readl(vpu->enc_base + reg);
395 
396 	vpu_debug(6, "0x%04x = 0x%08x\n", reg / 4, val);
397 	return val;
398 }
399 
400 static __always_inline void vdpu_write_relaxed(struct hantro_dev *vpu,
401 					       u32 val, u32 reg)
402 {
403 	vpu_debug(6, "0x%04x = 0x%08x\n", reg / 4, val);
404 	writel_relaxed(val, vpu->dec_base + reg);
405 }
406 
407 static __always_inline void vdpu_write(struct hantro_dev *vpu, u32 val, u32 reg)
408 {
409 	vpu_debug(6, "0x%04x = 0x%08x\n", reg / 4, val);
410 	writel(val, vpu->dec_base + reg);
411 }
412 
413 static __always_inline void hantro_write_addr(struct hantro_dev *vpu,
414 					      unsigned long offset,
415 					      dma_addr_t addr)
416 {
417 	vdpu_write(vpu, addr & 0xffffffff, offset);
418 }
419 
420 static __always_inline u32 vdpu_read(struct hantro_dev *vpu, u32 reg)
421 {
422 	u32 val = readl(vpu->dec_base + reg);
423 
424 	vpu_debug(6, "0x%04x = 0x%08x\n", reg / 4, val);
425 	return val;
426 }
427 
428 static __always_inline u32 vdpu_read_mask(struct hantro_dev *vpu,
429 					  const struct hantro_reg *reg,
430 					  u32 val)
431 {
432 	u32 v;
433 
434 	v = vdpu_read(vpu, reg->base);
435 	v &= ~(reg->mask << reg->shift);
436 	v |= ((val & reg->mask) << reg->shift);
437 	return v;
438 }
439 
440 static __always_inline void hantro_reg_write(struct hantro_dev *vpu,
441 					     const struct hantro_reg *reg,
442 					     u32 val)
443 {
444 	vdpu_write(vpu, vdpu_read_mask(vpu, reg, val), reg->base);
445 }
446 
447 static __always_inline void hantro_reg_write_relaxed(struct hantro_dev *vpu,
448 						     const struct hantro_reg *reg,
449 						     u32 val)
450 {
451 	vdpu_write_relaxed(vpu, vdpu_read_mask(vpu, reg, val), reg->base);
452 }
453 
454 void *hantro_get_ctrl(struct hantro_ctx *ctx, u32 id);
455 dma_addr_t hantro_get_ref(struct hantro_ctx *ctx, u64 ts);
456 
457 static inline struct vb2_v4l2_buffer *
458 hantro_get_src_buf(struct hantro_ctx *ctx)
459 {
460 	return v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
461 }
462 
463 static inline struct vb2_v4l2_buffer *
464 hantro_get_dst_buf(struct hantro_ctx *ctx)
465 {
466 	return v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
467 }
468 
469 bool hantro_needs_postproc(const struct hantro_ctx *ctx,
470 			   const struct hantro_fmt *fmt);
471 
472 static inline dma_addr_t
473 hantro_get_dec_buf_addr(struct hantro_ctx *ctx, struct vb2_buffer *vb)
474 {
475 	if (hantro_needs_postproc(ctx, ctx->vpu_dst_fmt))
476 		return ctx->postproc.dec_q[vb->index].dma;
477 	return vb2_dma_contig_plane_dma_addr(vb, 0);
478 }
479 
480 static inline struct hantro_decoded_buffer *
481 vb2_to_hantro_decoded_buf(struct vb2_buffer *buf)
482 {
483 	return container_of(buf, struct hantro_decoded_buffer, base.vb.vb2_buf);
484 }
485 
486 void hantro_postproc_disable(struct hantro_ctx *ctx);
487 void hantro_postproc_enable(struct hantro_ctx *ctx);
488 void hantro_postproc_free(struct hantro_ctx *ctx);
489 int hantro_postproc_alloc(struct hantro_ctx *ctx);
490 int hanto_postproc_enum_framesizes(struct hantro_ctx *ctx,
491 				   struct v4l2_frmsizeenum *fsize);
492 
493 #endif /* HANTRO_H_ */
494