drm_mipi_dsi.h

  1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 * MIPI DSI Bus
  4 *
  5 * Copyright (C) 2012-2013, Samsung Electronics, Co., Ltd.
  6 * Andrzej Hajda <a.hajda@samsung.com>
  7 */
  8
  9#ifndef __DRM_MIPI_DSI_H__
 10#define __DRM_MIPI_DSI_H__
 11
 12#include <linux/device.h>
 13#include <linux/delay.h>
 14
 15struct mipi_dsi_host;
 16struct mipi_dsi_device;
 17struct drm_dsc_picture_parameter_set;
 18
 19/* request ACK from peripheral */
 20#define MIPI_DSI_MSG_REQ_ACK	BIT(0)
 21/* use Low Power Mode to transmit message */
 22#define MIPI_DSI_MSG_USE_LPM	BIT(1)
 23
 24/**
 25 * struct mipi_dsi_msg - read/write DSI buffer
 26 * @channel: virtual channel id
 27 * @type: payload data type
 28 * @flags: flags controlling this message transmission
 29 * @tx_len: length of @tx_buf
 30 * @tx_buf: data to be written
 31 * @rx_len: length of @rx_buf
 32 * @rx_buf: data to be read, or NULL
 33 */
 34struct mipi_dsi_msg {
 35	u8 channel;
 36	u8 type;
 37	u16 flags;
 38
 39	size_t tx_len;
 40	const void *tx_buf;
 41
 42	size_t rx_len;
 43	void *rx_buf;
 44};
 45
 46bool mipi_dsi_packet_format_is_short(u8 type);
 47bool mipi_dsi_packet_format_is_long(u8 type);
 48
 49/**
 50 * struct mipi_dsi_packet - represents a MIPI DSI packet in protocol format
 51 * @size: size (in bytes) of the packet
 52 * @header: the four bytes that make up the header (Data ID, Word Count or
 53 *     Packet Data, and ECC)
 54 * @payload_length: number of bytes in the payload
 55 * @payload: a pointer to a buffer containing the payload, if any
 56 */
 57struct mipi_dsi_packet {
 58	size_t size;
 59	u8 header[4];
 60	size_t payload_length;
 61	const u8 *payload;
 62};
 63
 64int mipi_dsi_create_packet(struct mipi_dsi_packet *packet,
 65			   const struct mipi_dsi_msg *msg);
 66
 67/**
 68 * struct mipi_dsi_host_ops - DSI bus operations
 69 * @attach: attach DSI device to DSI host
 70 * @detach: detach DSI device from DSI host
 71 * @transfer: transmit a DSI packet
 72 *
 73 * DSI packets transmitted by .transfer() are passed in as mipi_dsi_msg
 74 * structures. This structure contains information about the type of packet
 75 * being transmitted as well as the transmit and receive buffers. When an
 76 * error is encountered during transmission, this function will return a
 77 * negative error code. On success it shall return the number of bytes
 78 * transmitted for write packets or the number of bytes received for read
 79 * packets.
 80 *
 81 * Note that typically DSI packet transmission is atomic, so the .transfer()
 82 * function will seldomly return anything other than the number of bytes
 83 * contained in the transmit buffer on success.
 84 *
 85 * Also note that those callbacks can be called no matter the state the
 86 * host is in. Drivers that need the underlying device to be powered to
 87 * perform these operations will first need to make sure it's been
 88 * properly enabled.
 89 */
 90struct mipi_dsi_host_ops {
 91	int (*attach)(struct mipi_dsi_host *host,
 92		      struct mipi_dsi_device *dsi);
 93	int (*detach)(struct mipi_dsi_host *host,
 94		      struct mipi_dsi_device *dsi);
 95	ssize_t (*transfer)(struct mipi_dsi_host *host,
 96			    const struct mipi_dsi_msg *msg);
 97};
 98
 99/**
100 * struct mipi_dsi_host - DSI host device
101 * @dev: driver model device node for this DSI host
102 * @ops: DSI host operations
103 * @list: list management
104 */
105struct mipi_dsi_host {
106	struct device *dev;
107	const struct mipi_dsi_host_ops *ops;
108	struct list_head list;
109};
110
111int mipi_dsi_host_register(struct mipi_dsi_host *host);
112void mipi_dsi_host_unregister(struct mipi_dsi_host *host);
113struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node);
114
115/* DSI mode flags */
116
117/* video mode */
118#define MIPI_DSI_MODE_VIDEO		BIT(0)
119/* video burst mode */
120#define MIPI_DSI_MODE_VIDEO_BURST	BIT(1)
121/* video pulse mode */
122#define MIPI_DSI_MODE_VIDEO_SYNC_PULSE	BIT(2)
123/* enable auto vertical count mode */
124#define MIPI_DSI_MODE_VIDEO_AUTO_VERT	BIT(3)
125/* enable hsync-end packets in vsync-pulse and v-porch area */
126#define MIPI_DSI_MODE_VIDEO_HSE		BIT(4)
127/* disable hfront-porch area */
128#define MIPI_DSI_MODE_VIDEO_NO_HFP	BIT(5)
129/* disable hback-porch area */
130#define MIPI_DSI_MODE_VIDEO_NO_HBP	BIT(6)
131/* disable hsync-active area */
132#define MIPI_DSI_MODE_VIDEO_NO_HSA	BIT(7)
133/* disable EoT packets in HS mode */
134#define MIPI_DSI_MODE_NO_EOT_PACKET	BIT(9)
135/* device supports non-continuous clock behavior (DSI spec 5.6.1) */
136#define MIPI_DSI_CLOCK_NON_CONTINUOUS	BIT(10)
137/* transmit data in low power */
138#define MIPI_DSI_MODE_LPM		BIT(11)
139/* transmit data ending at the same time for all lanes within one hsync */
140#define MIPI_DSI_HS_PKT_END_ALIGNED	BIT(12)
141
142enum mipi_dsi_pixel_format {
143	MIPI_DSI_FMT_RGB888,
144	MIPI_DSI_FMT_RGB666,
145	MIPI_DSI_FMT_RGB666_PACKED,
146	MIPI_DSI_FMT_RGB565,
147};
148
149#define DSI_DEV_NAME_SIZE		20
150
151/**
152 * struct mipi_dsi_device_info - template for creating a mipi_dsi_device
153 * @type: DSI peripheral chip type
154 * @channel: DSI virtual channel assigned to peripheral
155 * @node: pointer to OF device node or NULL
156 *
157 * This is populated and passed to mipi_dsi_device_new to create a new
158 * DSI device
159 */
160struct mipi_dsi_device_info {
161	char type[DSI_DEV_NAME_SIZE];
162	u32 channel;
163	struct device_node *node;
164};
165
166/**
167 * struct mipi_dsi_device - DSI peripheral device
168 * @host: DSI host for this peripheral
169 * @dev: driver model device node for this peripheral
170 * @attached: the DSI device has been successfully attached
171 * @name: DSI peripheral chip type
172 * @channel: virtual channel assigned to the peripheral
173 * @format: pixel format for video mode
174 * @lanes: number of active data lanes
175 * @mode_flags: DSI operation mode related flags
176 * @hs_rate: maximum lane frequency for high speed mode in hertz, this should
177 * be set to the real limits of the hardware, zero is only accepted for
178 * legacy drivers
179 * @lp_rate: maximum lane frequency for low power mode in hertz, this should
180 * be set to the real limits of the hardware, zero is only accepted for
181 * legacy drivers
182 * @dsc: panel/bridge DSC pps payload to be sent
183 */
184struct mipi_dsi_device {
185	struct mipi_dsi_host *host;
186	struct device dev;
187	bool attached;
188
189	char name[DSI_DEV_NAME_SIZE];
190	unsigned int channel;
191	unsigned int lanes;
192	enum mipi_dsi_pixel_format format;
193	unsigned long mode_flags;
194	unsigned long hs_rate;
195	unsigned long lp_rate;
196	struct drm_dsc_config *dsc;
197};
198
199/**
200 * struct mipi_dsi_multi_context - Context to call multiple MIPI DSI funcs in a row
201 */
202struct mipi_dsi_multi_context {
203	/**
204	 * @dsi: Pointer to the MIPI DSI device
205	 */
206	struct mipi_dsi_device *dsi;
207
208	/**
209	 * @accum_err: Storage for the accumulated error over the multiple calls
210	 *
211	 * Init to 0. If a function encounters an error then the error code
212	 * will be stored here. If you call a function and this points to a
213	 * non-zero value then the function will be a noop. This allows calling
214	 * a function many times in a row and just checking the error at the
215	 * end to see if any of them failed.
216	 */
217	int accum_err;
218};
219
220#define MIPI_DSI_MODULE_PREFIX "mipi-dsi:"
221
222#define to_mipi_dsi_device(__dev)	container_of_const(__dev, struct mipi_dsi_device, dev)
223
224extern const struct bus_type mipi_dsi_bus_type;
225#define dev_is_mipi_dsi(dev)	((dev)->bus == &mipi_dsi_bus_type)
226
227/**
228 * mipi_dsi_pixel_format_to_bpp - obtain the number of bits per pixel for any
229 *                                given pixel format defined by the MIPI DSI
230 *                                specification
231 * @fmt: MIPI DSI pixel format
232 *
233 * Returns: The number of bits per pixel of the given pixel format.
234 */
235static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt)
236{
237	switch (fmt) {
238	case MIPI_DSI_FMT_RGB888:
239	case MIPI_DSI_FMT_RGB666:
240		return 24;
241
242	case MIPI_DSI_FMT_RGB666_PACKED:
243		return 18;
244
245	case MIPI_DSI_FMT_RGB565:
246		return 16;
247	}
248
249	return -EINVAL;
250}
251
252enum mipi_dsi_compression_algo {
253	MIPI_DSI_COMPRESSION_DSC = 0,
254	MIPI_DSI_COMPRESSION_VENDOR = 3,
255	/* other two values are reserved, DSI 1.3 */
256};
257
258struct mipi_dsi_device *
259mipi_dsi_device_register_full(struct mipi_dsi_host *host,
260			      const struct mipi_dsi_device_info *info);
261void mipi_dsi_device_unregister(struct mipi_dsi_device *dsi);
262struct mipi_dsi_device *
263devm_mipi_dsi_device_register_full(struct device *dev, struct mipi_dsi_host *host,
264				   const struct mipi_dsi_device_info *info);
265struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np);
266int mipi_dsi_attach(struct mipi_dsi_device *dsi);
267int mipi_dsi_detach(struct mipi_dsi_device *dsi);
268int devm_mipi_dsi_attach(struct device *dev, struct mipi_dsi_device *dsi);
269int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi);
270int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi);
271int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,
272					    u16 value);
273int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable);
274int mipi_dsi_compression_mode_ext(struct mipi_dsi_device *dsi, bool enable,
275				  enum mipi_dsi_compression_algo algo,
276				  unsigned int pps_selector);
277int mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,
278				   const struct drm_dsc_picture_parameter_set *pps);
279
280void mipi_dsi_compression_mode_ext_multi(struct mipi_dsi_multi_context *ctx,
281					 bool enable,
282					 enum mipi_dsi_compression_algo algo,
283					 unsigned int pps_selector);
284void mipi_dsi_compression_mode_multi(struct mipi_dsi_multi_context *ctx,
285				     bool enable);
286void mipi_dsi_picture_parameter_set_multi(struct mipi_dsi_multi_context *ctx,
287					  const struct drm_dsc_picture_parameter_set *pps);
288
289ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,
290			       size_t size);
291void mipi_dsi_generic_write_multi(struct mipi_dsi_multi_context *ctx,
292				  const void *payload, size_t size);
293void mipi_dsi_dual_generic_write_multi(struct mipi_dsi_multi_context *ctx,
294				       struct mipi_dsi_device *dsi1,
295				       struct mipi_dsi_device *dsi2,
296				       const void *payload, size_t size);
297ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,
298			      size_t num_params, void *data, size_t size);
299u32 drm_mipi_dsi_get_input_bus_fmt(enum mipi_dsi_pixel_format dsi_format);
300
301#define mipi_dsi_msleep(ctx, delay)	\
302	do {				\
303		if (!(ctx)->accum_err)	\
304			msleep(delay);	\
305	} while (0)
306
307#define mipi_dsi_usleep_range(ctx, min, max)	\
308	do {					\
309		if (!(ctx)->accum_err)		\
310			usleep_range(min, max);	\
311	} while (0)
312
313/**
314 * enum mipi_dsi_dcs_tear_mode - Tearing Effect Output Line mode
315 * @MIPI_DSI_DCS_TEAR_MODE_VBLANK: the TE output line consists of V-Blanking
316 *    information only
317 * @MIPI_DSI_DCS_TEAR_MODE_VHBLANK : the TE output line consists of both
318 *    V-Blanking and H-Blanking information
319 */
320enum mipi_dsi_dcs_tear_mode {
321	MIPI_DSI_DCS_TEAR_MODE_VBLANK,
322	MIPI_DSI_DCS_TEAR_MODE_VHBLANK,
323};
324
325#define MIPI_DSI_DCS_POWER_MODE_DISPLAY (1 << 2)
326#define MIPI_DSI_DCS_POWER_MODE_NORMAL  (1 << 3)
327#define MIPI_DSI_DCS_POWER_MODE_SLEEP   (1 << 4)
328#define MIPI_DSI_DCS_POWER_MODE_PARTIAL (1 << 5)
329#define MIPI_DSI_DCS_POWER_MODE_IDLE    (1 << 6)
330
331ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,
332				  const void *data, size_t len);
333int mipi_dsi_dcs_write_buffer_chatty(struct mipi_dsi_device *dsi,
334				     const void *data, size_t len);
335void mipi_dsi_dcs_write_buffer_multi(struct mipi_dsi_multi_context *ctx,
336				     const void *data, size_t len);
337void mipi_dsi_dual_dcs_write_buffer_multi(struct mipi_dsi_multi_context *ctx,
338					  struct mipi_dsi_device *dsi1,
339					  struct mipi_dsi_device *dsi2,
340					  const void *data, size_t len);
341ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,
342			   const void *data, size_t len);
343ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,
344			  size_t len);
345void mipi_dsi_dcs_read_multi(struct mipi_dsi_multi_context *ctx, u8 cmd,
346			     void *data, size_t len);
347int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi);
348int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi);
349int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode);
350int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format);
351int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi);
352int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi);
353int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi);
354int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi);
355int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,
356				    u16 end);
357int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,
358				  u16 end);
359int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
360			     enum mipi_dsi_dcs_tear_mode mode);
361int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format);
362int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline);
363int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi,
364					u16 brightness);
365int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,
366					u16 *brightness);
367int mipi_dsi_dcs_set_display_brightness_large(struct mipi_dsi_device *dsi,
368					     u16 brightness);
369int mipi_dsi_dcs_get_display_brightness_large(struct mipi_dsi_device *dsi,
370					     u16 *brightness);
371
372void mipi_dsi_dcs_nop_multi(struct mipi_dsi_multi_context *ctx);
373void mipi_dsi_dcs_enter_sleep_mode_multi(struct mipi_dsi_multi_context *ctx);
374void mipi_dsi_dcs_exit_sleep_mode_multi(struct mipi_dsi_multi_context *ctx);
375void mipi_dsi_dcs_set_display_off_multi(struct mipi_dsi_multi_context *ctx);
376void mipi_dsi_dcs_set_display_on_multi(struct mipi_dsi_multi_context *ctx);
377void mipi_dsi_dcs_set_tear_on_multi(struct mipi_dsi_multi_context *ctx,
378				    enum mipi_dsi_dcs_tear_mode mode);
379void mipi_dsi_turn_on_peripheral_multi(struct mipi_dsi_multi_context *ctx);
380void mipi_dsi_dcs_soft_reset_multi(struct mipi_dsi_multi_context *ctx);
381void mipi_dsi_dcs_set_display_brightness_multi(struct mipi_dsi_multi_context *ctx,
382					       u16 brightness);
383void mipi_dsi_dcs_set_pixel_format_multi(struct mipi_dsi_multi_context *ctx,
384					 u8 format);
385void mipi_dsi_dcs_set_column_address_multi(struct mipi_dsi_multi_context *ctx,
386					   u16 start, u16 end);
387void mipi_dsi_dcs_set_page_address_multi(struct mipi_dsi_multi_context *ctx,
388					 u16 start, u16 end);
389void mipi_dsi_dcs_set_tear_scanline_multi(struct mipi_dsi_multi_context *ctx,
390					  u16 scanline);
391void mipi_dsi_dcs_set_tear_off_multi(struct mipi_dsi_multi_context *ctx);
392
393/**
394 * mipi_dsi_generic_write_seq_multi - transmit data using a generic write packet
395 *
396 * This macro will print errors for you and error handling is optimized for
397 * callers that call this multiple times in a row.
398 *
399 * @ctx: Context for multiple DSI transactions
400 * @seq: buffer containing the payload
401 */
402#define mipi_dsi_generic_write_seq_multi(ctx, seq...)                \
403	do {                                                         \
404		static const u8 d[] = { seq };                       \
405		mipi_dsi_generic_write_multi(ctx, d, ARRAY_SIZE(d)); \
406	} while (0)
407
408/**
409 * mipi_dsi_generic_write_var_seq_multi - transmit non-constant data using a
410 * generic write packet
411 *
412 * This macro will print errors for you and error handling is optimized for
413 * callers that call this multiple times in a row.
414 *
415 * @ctx: Context for multiple DSI transactions
416 * @seq: buffer containing the payload
417 */
418#define mipi_dsi_generic_write_var_seq_multi(ctx, seq...)	     \
419	do {							     \
420		const u8 d[] = { seq };				     \
421		mipi_dsi_generic_write_multi(ctx, d, ARRAY_SIZE(d)); \
422	} while (0)
423
424/**
425 * mipi_dsi_dcs_write_seq_multi - transmit a DCS command with payload
426 *
427 * This macro will print errors for you and error handling is optimized for
428 * callers that call this multiple times in a row.
429 *
430 * @ctx: Context for multiple DSI transactions
431 * @cmd: Command
432 * @seq: buffer containing data to be transmitted
433 */
434#define mipi_dsi_dcs_write_seq_multi(ctx, cmd, seq...)                  \
435	do {                                                            \
436		static const u8 d[] = { cmd, seq };                     \
437		mipi_dsi_dcs_write_buffer_multi(ctx, d, ARRAY_SIZE(d)); \
438	} while (0)
439
440/**
441 * mipi_dsi_dcs_write_var_seq_multi - transmit a DCS command with non-constant
442 * payload
443 *
444 * This macro will print errors for you and error handling is optimized for
445 * callers that call this multiple times in a row.
446 *
447 * @ctx: Context for multiple DSI transactions
448 * @cmd: Command
449 * @seq: buffer containing data to be transmitted
450 */
451#define mipi_dsi_dcs_write_var_seq_multi(ctx, cmd, seq...)		\
452	do {								\
453		const u8 d[] = { cmd, seq };				\
454		mipi_dsi_dcs_write_buffer_multi(ctx, d, ARRAY_SIZE(d));	\
455	} while (0)
456
457/**
458 * mipi_dsi_dual - send the same MIPI DSI command to two interfaces
459 *
460 * This macro will send the specified MIPI DSI command twice, once per each of
461 * the two interfaces supplied. This is useful for reducing duplication of code
462 * in panel drivers which use two parallel serial interfaces.
463 *
464 * Note that the _func parameter cannot accept a macro such as
465 * mipi_dsi_generic_write_multi() or mipi_dsi_dcs_write_buffer_multi(). See
466 * mipi_dsi_dual_generic_write_multi() and
467 * mipi_dsi_dual_dcs_write_buffer_multi() instead.
468 *
469 * WARNING: This macro reuses the _func argument and the optional trailing
470 * arguments twice each, which may cause unintended side effects. For example,
471 * adding the postfix increment ++ operator to one of the arguments to be
472 * passed to _func will cause the variable to be incremented twice instead of
473 * once and the variable will be its original value + 1 when sent to _dsi2.
474 *
475 * @_func: MIPI DSI function to pass context and arguments into
476 * @_ctx: Context for multiple DSI transactions
477 * @_dsi1: First DSI interface to act as recipient of the MIPI DSI command
478 * @_dsi2: Second DSI interface to act as recipient of the MIPI DSI command
479 * @...: Arguments to pass to MIPI DSI function or macro
480 */
481
482#define mipi_dsi_dual(_func, _ctx, _dsi1, _dsi2, ...)		 \
483	do {							 \
484		struct mipi_dsi_multi_context *_ctxcpy = (_ctx); \
485		_ctxcpy->dsi = (_dsi1);				 \
486		(_func)(_ctxcpy, ##__VA_ARGS__);		 \
487		_ctxcpy->dsi = (_dsi2);				 \
488		(_func)(_ctxcpy, ##__VA_ARGS__);		 \
489	} while (0)
490
491/**
492 * mipi_dsi_dual_generic_write_seq_multi - transmit data using a generic write
493 * packet to two dsi interfaces, one after the other
494 *
495 * This macro will send the specified generic packet twice, once per each of
496 * the two interfaces supplied. This is useful for reducing duplication of code
497 * in panel drivers which use two parallel serial interfaces.
498 *
499 * Note that if an error occurs while transmitting the packet to the first DSI
500 * interface, the packet will not be sent to the second DSI interface.
501 *
502 * This macro will print errors for you and error handling is optimized for
503 * callers that call this multiple times in a row.
504 *
505 * @_ctx: Context for multiple DSI transactions
506 * @_dsi1: First DSI interface to act as recipient of packet
507 * @_dsi2: Second DSI interface to act as recipient of packet
508 * @_seq: buffer containing the payload
509 */
510#define mipi_dsi_dual_generic_write_seq_multi(_ctx, _dsi1, _dsi2, _seq...) \
511	do {								   \
512		static const u8 d[] = { _seq };				   \
513		mipi_dsi_dual_generic_write_multi(_ctx, _dsi1, _dsi2, d,   \
514						  ARRAY_SIZE(d));	   \
515	} while (0)
516
517/**
518 * mipi_dsi_dual_dcs_write_seq_multi - transmit a DCS command with payload to
519 * two dsi interfaces, one after the other
520 *
521 * This macro will send the specified DCS command with payload twice, once per
522 * each of the two interfaces supplied. This is useful for reducing duplication
523 * of code in panel drivers which use two parallel serial interfaces.
524 *
525 * Note that if an error occurs while transmitting the payload to the first DSI
526 * interface, the payload will not be sent to the second DSI interface.
527 *
528 * This macro will print errors for you and error handling is optimized for
529 * callers that call this multiple times in a row.
530 *
531 * @_ctx: Context for multiple DSI transactions
532 * @_dsi1: First DSI interface to act as recipient of packet
533 * @_dsi2: Second DSI interface to act as recipient of packet
534 * @_cmd: Command
535 * @_seq: buffer containing the payload
536 */
537#define mipi_dsi_dual_dcs_write_seq_multi(_ctx, _dsi1, _dsi2, _cmd, _seq...) \
538	do {								     \
539		static const u8 d[] = { _cmd, _seq };			     \
540		mipi_dsi_dual_dcs_write_buffer_multi(_ctx, _dsi1, _dsi2, d,  \
541						     ARRAY_SIZE(d));	     \
542	} while (0)
543
544/**
545 * struct mipi_dsi_driver - DSI driver
546 * @driver: device driver model driver
547 * @probe: callback for device binding
548 * @remove: callback for device unbinding
549 * @shutdown: called at shutdown time to quiesce the device
550 */
551struct mipi_dsi_driver {
552	struct device_driver driver;
553	int(*probe)(struct mipi_dsi_device *dsi);
554	void (*remove)(struct mipi_dsi_device *dsi);
555	void (*shutdown)(struct mipi_dsi_device *dsi);
556};
557
558static inline struct mipi_dsi_driver *
559to_mipi_dsi_driver(struct device_driver *driver)
560{
561	return container_of(driver, struct mipi_dsi_driver, driver);
562}
563
564static inline void *mipi_dsi_get_drvdata(const struct mipi_dsi_device *dsi)
565{
566	return dev_get_drvdata(&dsi->dev);
567}
568
569static inline void mipi_dsi_set_drvdata(struct mipi_dsi_device *dsi, void *data)
570{
571	dev_set_drvdata(&dsi->dev, data);
572}
573
574int mipi_dsi_driver_register_full(struct mipi_dsi_driver *driver,
575				  struct module *owner);
576void mipi_dsi_driver_unregister(struct mipi_dsi_driver *driver);
577
578#define mipi_dsi_driver_register(driver) \
579	mipi_dsi_driver_register_full(driver, THIS_MODULE)
580
581#define module_mipi_dsi_driver(__mipi_dsi_driver) \
582	module_driver(__mipi_dsi_driver, mipi_dsi_driver_register, \
583			mipi_dsi_driver_unregister)
584
585#endif /* __DRM_MIPI_DSI__ */