4 * Copyright (C) 2012-2013, Samsung Electronics, Co., Ltd.
5 * Andrzej Hajda <a.hajda@samsung.com>
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
22 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
23 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
24 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
25 * USE OR OTHER DEALINGS IN THE SOFTWARE.
28 #include <drm/drm_mipi_dsi.h>
30 #include <linux/device.h>
31 #include <linux/module.h>
32 #include <linux/pm_runtime.h>
33 #include <linux/slab.h>
35 #include <video/mipi_display.h>
40 * These functions contain some common logic and helpers to deal with MIPI DSI
43 * Helpers are provided for a number of standard MIPI DSI command as well as a
44 * subset of the MIPI DCS command set.
48 static int mipi_dsi_device_match(struct device
*dev
, struct device_driver
*drv
)
50 struct mipi_dsi_device
*dsi
= to_mipi_dsi_device(dev
);
52 /* attempt OF style match */
53 if (of_driver_match_device(dev
, drv
))
56 /* compare DSI device and driver names */
57 if (!strcmp(dsi
->name
, drv
->name
))
63 static int mipi_dsi_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
65 struct mipi_dsi_device
*dsi
= to_mipi_dsi_device(dev
);
68 err
= of_device_uevent_modalias(dev
, env
);
72 add_uevent_var(env
, "MODALIAS=%s%s", MIPI_DSI_MODULE_PREFIX
,
78 static const struct dev_pm_ops mipi_dsi_device_pm_ops
= {
79 .runtime_suspend
= pm_generic_runtime_suspend
,
80 .runtime_resume
= pm_generic_runtime_resume
,
81 .suspend
= pm_generic_suspend
,
82 .resume
= pm_generic_resume
,
83 .freeze
= pm_generic_freeze
,
84 .thaw
= pm_generic_thaw
,
85 .poweroff
= pm_generic_poweroff
,
86 .restore
= pm_generic_restore
,
89 static struct bus_type mipi_dsi_bus_type
= {
91 .match
= mipi_dsi_device_match
,
92 .uevent
= mipi_dsi_uevent
,
93 .pm
= &mipi_dsi_device_pm_ops
,
96 static int of_device_match(struct device
*dev
, void *data
)
98 return dev
->of_node
== data
;
102 * of_find_mipi_dsi_device_by_node() - find the MIPI DSI device matching a
104 * @np: device tree node
106 * Return: A pointer to the MIPI DSI device corresponding to @np or NULL if no
107 * such device exists (or has not been registered yet).
109 struct mipi_dsi_device
*of_find_mipi_dsi_device_by_node(struct device_node
*np
)
113 dev
= bus_find_device(&mipi_dsi_bus_type
, NULL
, np
, of_device_match
);
115 return dev
? to_mipi_dsi_device(dev
) : NULL
;
117 EXPORT_SYMBOL(of_find_mipi_dsi_device_by_node
);
119 static void mipi_dsi_dev_release(struct device
*dev
)
121 struct mipi_dsi_device
*dsi
= to_mipi_dsi_device(dev
);
123 of_node_put(dev
->of_node
);
127 static const struct device_type mipi_dsi_device_type
= {
128 .release
= mipi_dsi_dev_release
,
131 static struct mipi_dsi_device
*mipi_dsi_device_alloc(struct mipi_dsi_host
*host
)
133 struct mipi_dsi_device
*dsi
;
135 dsi
= kzalloc(sizeof(*dsi
), GFP_KERNEL
);
137 return ERR_PTR(-ENOMEM
);
140 dsi
->dev
.bus
= &mipi_dsi_bus_type
;
141 dsi
->dev
.parent
= host
->dev
;
142 dsi
->dev
.type
= &mipi_dsi_device_type
;
144 device_initialize(&dsi
->dev
);
149 static int mipi_dsi_device_add(struct mipi_dsi_device
*dsi
)
151 struct mipi_dsi_host
*host
= dsi
->host
;
153 dev_set_name(&dsi
->dev
, "%s.%d", dev_name(host
->dev
), dsi
->channel
);
155 return device_add(&dsi
->dev
);
158 #if IS_ENABLED(CONFIG_OF)
159 static struct mipi_dsi_device
*
160 of_mipi_dsi_device_add(struct mipi_dsi_host
*host
, struct device_node
*node
)
162 struct device
*dev
= host
->dev
;
163 struct mipi_dsi_device_info info
= { };
167 if (of_modalias_node(node
, info
.type
, sizeof(info
.type
)) < 0) {
168 dev_err(dev
, "modalias failure on %pOF\n", node
);
169 return ERR_PTR(-EINVAL
);
172 ret
= of_property_read_u32(node
, "reg", ®
);
174 dev_err(dev
, "device node %pOF has no valid reg property: %d\n",
176 return ERR_PTR(-EINVAL
);
180 info
.node
= of_node_get(node
);
182 return mipi_dsi_device_register_full(host
, &info
);
185 static struct mipi_dsi_device
*
186 of_mipi_dsi_device_add(struct mipi_dsi_host
*host
, struct device_node
*node
)
188 return ERR_PTR(-ENODEV
);
193 * mipi_dsi_device_register_full - create a MIPI DSI device
194 * @host: DSI host to which this device is connected
195 * @info: pointer to template containing DSI device information
197 * Create a MIPI DSI device by using the device information provided by
198 * mipi_dsi_device_info template
201 * A pointer to the newly created MIPI DSI device, or, a pointer encoded
204 struct mipi_dsi_device
*
205 mipi_dsi_device_register_full(struct mipi_dsi_host
*host
,
206 const struct mipi_dsi_device_info
*info
)
208 struct mipi_dsi_device
*dsi
;
209 struct device
*dev
= host
->dev
;
213 dev_err(dev
, "invalid mipi_dsi_device_info pointer\n");
214 return ERR_PTR(-EINVAL
);
217 if (info
->channel
> 3) {
218 dev_err(dev
, "invalid virtual channel: %u\n", info
->channel
);
219 return ERR_PTR(-EINVAL
);
222 dsi
= mipi_dsi_device_alloc(host
);
224 dev_err(dev
, "failed to allocate DSI device %ld\n",
229 dsi
->dev
.of_node
= info
->node
;
230 dsi
->channel
= info
->channel
;
231 strlcpy(dsi
->name
, info
->type
, sizeof(dsi
->name
));
233 ret
= mipi_dsi_device_add(dsi
);
235 dev_err(dev
, "failed to add DSI device %d\n", ret
);
242 EXPORT_SYMBOL(mipi_dsi_device_register_full
);
245 * mipi_dsi_device_unregister - unregister MIPI DSI device
246 * @dsi: DSI peripheral device
248 void mipi_dsi_device_unregister(struct mipi_dsi_device
*dsi
)
250 device_unregister(&dsi
->dev
);
252 EXPORT_SYMBOL(mipi_dsi_device_unregister
);
254 static DEFINE_MUTEX(host_lock
);
255 static LIST_HEAD(host_list
);
258 * of_find_mipi_dsi_host_by_node() - find the MIPI DSI host matching a
260 * @node: device tree node
263 * A pointer to the MIPI DSI host corresponding to @node or NULL if no
264 * such device exists (or has not been registered yet).
266 struct mipi_dsi_host
*of_find_mipi_dsi_host_by_node(struct device_node
*node
)
268 struct mipi_dsi_host
*host
;
270 mutex_lock(&host_lock
);
272 list_for_each_entry(host
, &host_list
, list
) {
273 if (host
->dev
->of_node
== node
) {
274 mutex_unlock(&host_lock
);
279 mutex_unlock(&host_lock
);
283 EXPORT_SYMBOL(of_find_mipi_dsi_host_by_node
);
285 int mipi_dsi_host_register(struct mipi_dsi_host
*host
)
287 struct device_node
*node
;
289 for_each_available_child_of_node(host
->dev
->of_node
, node
) {
290 /* skip nodes without reg property */
291 if (!of_find_property(node
, "reg", NULL
))
293 of_mipi_dsi_device_add(host
, node
);
296 mutex_lock(&host_lock
);
297 list_add_tail(&host
->list
, &host_list
);
298 mutex_unlock(&host_lock
);
302 EXPORT_SYMBOL(mipi_dsi_host_register
);
304 static int mipi_dsi_remove_device_fn(struct device
*dev
, void *priv
)
306 struct mipi_dsi_device
*dsi
= to_mipi_dsi_device(dev
);
308 mipi_dsi_device_unregister(dsi
);
313 void mipi_dsi_host_unregister(struct mipi_dsi_host
*host
)
315 device_for_each_child(host
->dev
, NULL
, mipi_dsi_remove_device_fn
);
317 mutex_lock(&host_lock
);
318 list_del_init(&host
->list
);
319 mutex_unlock(&host_lock
);
321 EXPORT_SYMBOL(mipi_dsi_host_unregister
);
325 * mipi_dsi_attach - attach a DSI device to its DSI host
326 * @dsi: DSI peripheral
328 int mipi_dsi_attach(struct mipi_dsi_device
*dsi
)
330 const struct mipi_dsi_host_ops
*ops
= dsi
->host
->ops
;
332 if (!ops
|| !ops
->attach
)
335 return ops
->attach(dsi
->host
, dsi
);
337 EXPORT_SYMBOL(mipi_dsi_attach
);
340 * mipi_dsi_detach - detach a DSI device from its DSI host
341 * @dsi: DSI peripheral
343 int mipi_dsi_detach(struct mipi_dsi_device
*dsi
)
345 const struct mipi_dsi_host_ops
*ops
= dsi
->host
->ops
;
347 if (!ops
|| !ops
->detach
)
350 return ops
->detach(dsi
->host
, dsi
);
352 EXPORT_SYMBOL(mipi_dsi_detach
);
354 static ssize_t
mipi_dsi_device_transfer(struct mipi_dsi_device
*dsi
,
355 struct mipi_dsi_msg
*msg
)
357 const struct mipi_dsi_host_ops
*ops
= dsi
->host
->ops
;
359 if (!ops
|| !ops
->transfer
)
362 if (dsi
->mode_flags
& MIPI_DSI_MODE_LPM
)
363 msg
->flags
|= MIPI_DSI_MSG_USE_LPM
;
365 return ops
->transfer(dsi
->host
, msg
);
369 * mipi_dsi_packet_format_is_short - check if a packet is of the short format
370 * @type: MIPI DSI data type of the packet
372 * Return: true if the packet for the given data type is a short packet, false
375 bool mipi_dsi_packet_format_is_short(u8 type
)
378 case MIPI_DSI_V_SYNC_START
:
379 case MIPI_DSI_V_SYNC_END
:
380 case MIPI_DSI_H_SYNC_START
:
381 case MIPI_DSI_H_SYNC_END
:
382 case MIPI_DSI_END_OF_TRANSMISSION
:
383 case MIPI_DSI_COLOR_MODE_OFF
:
384 case MIPI_DSI_COLOR_MODE_ON
:
385 case MIPI_DSI_SHUTDOWN_PERIPHERAL
:
386 case MIPI_DSI_TURN_ON_PERIPHERAL
:
387 case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM
:
388 case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM
:
389 case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM
:
390 case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM
:
391 case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM
:
392 case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM
:
393 case MIPI_DSI_DCS_SHORT_WRITE
:
394 case MIPI_DSI_DCS_SHORT_WRITE_PARAM
:
395 case MIPI_DSI_DCS_READ
:
396 case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE
:
402 EXPORT_SYMBOL(mipi_dsi_packet_format_is_short
);
405 * mipi_dsi_packet_format_is_long - check if a packet is of the long format
406 * @type: MIPI DSI data type of the packet
408 * Return: true if the packet for the given data type is a long packet, false
411 bool mipi_dsi_packet_format_is_long(u8 type
)
414 case MIPI_DSI_NULL_PACKET
:
415 case MIPI_DSI_BLANKING_PACKET
:
416 case MIPI_DSI_GENERIC_LONG_WRITE
:
417 case MIPI_DSI_DCS_LONG_WRITE
:
418 case MIPI_DSI_LOOSELY_PACKED_PIXEL_STREAM_YCBCR20
:
419 case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR24
:
420 case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR16
:
421 case MIPI_DSI_PACKED_PIXEL_STREAM_30
:
422 case MIPI_DSI_PACKED_PIXEL_STREAM_36
:
423 case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR12
:
424 case MIPI_DSI_PACKED_PIXEL_STREAM_16
:
425 case MIPI_DSI_PACKED_PIXEL_STREAM_18
:
426 case MIPI_DSI_PIXEL_STREAM_3BYTE_18
:
427 case MIPI_DSI_PACKED_PIXEL_STREAM_24
:
433 EXPORT_SYMBOL(mipi_dsi_packet_format_is_long
);
436 * mipi_dsi_create_packet - create a packet from a message according to the
438 * @packet: pointer to a DSI packet structure
439 * @msg: message to translate into a packet
441 * Return: 0 on success or a negative error code on failure.
443 int mipi_dsi_create_packet(struct mipi_dsi_packet
*packet
,
444 const struct mipi_dsi_msg
*msg
)
449 /* do some minimum sanity checking */
450 if (!mipi_dsi_packet_format_is_short(msg
->type
) &&
451 !mipi_dsi_packet_format_is_long(msg
->type
))
454 if (msg
->channel
> 3)
457 memset(packet
, 0, sizeof(*packet
));
458 packet
->header
[0] = ((msg
->channel
& 0x3) << 6) | (msg
->type
& 0x3f);
460 /* TODO: compute ECC if hardware support is not available */
463 * Long write packets contain the word count in header bytes 1 and 2.
464 * The payload follows the header and is word count bytes long.
466 * Short write packets encode up to two parameters in header bytes 1
469 if (mipi_dsi_packet_format_is_long(msg
->type
)) {
470 packet
->header
[1] = (msg
->tx_len
>> 0) & 0xff;
471 packet
->header
[2] = (msg
->tx_len
>> 8) & 0xff;
473 packet
->payload_length
= msg
->tx_len
;
474 packet
->payload
= msg
->tx_buf
;
476 const u8
*tx
= msg
->tx_buf
;
478 packet
->header
[1] = (msg
->tx_len
> 0) ? tx
[0] : 0;
479 packet
->header
[2] = (msg
->tx_len
> 1) ? tx
[1] : 0;
482 packet
->size
= sizeof(packet
->header
) + packet
->payload_length
;
486 EXPORT_SYMBOL(mipi_dsi_create_packet
);
489 * mipi_dsi_shutdown_peripheral() - sends a Shutdown Peripheral command
490 * @dsi: DSI peripheral device
492 * Return: 0 on success or a negative error code on failure.
494 int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device
*dsi
)
496 struct mipi_dsi_msg msg
= {
497 .channel
= dsi
->channel
,
498 .type
= MIPI_DSI_SHUTDOWN_PERIPHERAL
,
499 .tx_buf
= (u8
[2]) { 0, 0 },
503 return mipi_dsi_device_transfer(dsi
, &msg
);
505 EXPORT_SYMBOL(mipi_dsi_shutdown_peripheral
);
508 * mipi_dsi_turn_on_peripheral() - sends a Turn On Peripheral command
509 * @dsi: DSI peripheral device
511 * Return: 0 on success or a negative error code on failure.
513 int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device
*dsi
)
515 struct mipi_dsi_msg msg
= {
516 .channel
= dsi
->channel
,
517 .type
= MIPI_DSI_TURN_ON_PERIPHERAL
,
518 .tx_buf
= (u8
[2]) { 0, 0 },
522 return mipi_dsi_device_transfer(dsi
, &msg
);
524 EXPORT_SYMBOL(mipi_dsi_turn_on_peripheral
);
528 * mipi_dsi_set_maximum_return_packet_size() - specify the maximum size of the
529 * the payload in a long packet transmitted from the peripheral back to the
531 * @dsi: DSI peripheral device
532 * @value: the maximum size of the payload
534 * Return: 0 on success or a negative error code on failure.
536 int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device
*dsi
,
539 u8 tx
[2] = { value
& 0xff, value
>> 8 };
540 struct mipi_dsi_msg msg
= {
541 .channel
= dsi
->channel
,
542 .type
= MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE
,
543 .tx_len
= sizeof(tx
),
547 return mipi_dsi_device_transfer(dsi
, &msg
);
549 EXPORT_SYMBOL(mipi_dsi_set_maximum_return_packet_size
);
553 * mipi_dsi_generic_write() - transmit data using a generic write packet
554 * @dsi: DSI peripheral device
555 * @payload: buffer containing the payload
556 * @size: size of payload buffer
558 * This function will automatically choose the right data type depending on
559 * the payload length.
561 * Return: The number of bytes transmitted on success or a negative error code
564 ssize_t
mipi_dsi_generic_write(struct mipi_dsi_device
*dsi
, const void *payload
,
567 struct mipi_dsi_msg msg
= {
568 .channel
= dsi
->channel
,
575 msg
.type
= MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM
;
579 msg
.type
= MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM
;
583 msg
.type
= MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM
;
587 msg
.type
= MIPI_DSI_GENERIC_LONG_WRITE
;
591 return mipi_dsi_device_transfer(dsi
, &msg
);
593 EXPORT_SYMBOL(mipi_dsi_generic_write
);
596 * mipi_dsi_generic_read() - receive data using a generic read packet
597 * @dsi: DSI peripheral device
598 * @params: buffer containing the request parameters
599 * @num_params: number of request parameters
600 * @data: buffer in which to return the received data
601 * @size: size of receive buffer
603 * This function will automatically choose the right data type depending on
604 * the number of parameters passed in.
606 * Return: The number of bytes successfully read or a negative error code on
609 ssize_t
mipi_dsi_generic_read(struct mipi_dsi_device
*dsi
, const void *params
,
610 size_t num_params
, void *data
, size_t size
)
612 struct mipi_dsi_msg msg
= {
613 .channel
= dsi
->channel
,
614 .tx_len
= num_params
,
620 switch (num_params
) {
622 msg
.type
= MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM
;
626 msg
.type
= MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM
;
630 msg
.type
= MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM
;
637 return mipi_dsi_device_transfer(dsi
, &msg
);
639 EXPORT_SYMBOL(mipi_dsi_generic_read
);
642 * mipi_dsi_dcs_write_buffer() - transmit a DCS command with payload
643 * @dsi: DSI peripheral device
644 * @data: buffer containing data to be transmitted
645 * @len: size of transmission buffer
647 * This function will automatically choose the right data type depending on
648 * the command payload length.
650 * Return: The number of bytes successfully transmitted or a negative error
653 ssize_t
mipi_dsi_dcs_write_buffer(struct mipi_dsi_device
*dsi
,
654 const void *data
, size_t len
)
656 struct mipi_dsi_msg msg
= {
657 .channel
= dsi
->channel
,
667 msg
.type
= MIPI_DSI_DCS_SHORT_WRITE
;
671 msg
.type
= MIPI_DSI_DCS_SHORT_WRITE_PARAM
;
675 msg
.type
= MIPI_DSI_DCS_LONG_WRITE
;
679 return mipi_dsi_device_transfer(dsi
, &msg
);
681 EXPORT_SYMBOL(mipi_dsi_dcs_write_buffer
);
684 * mipi_dsi_dcs_write() - send DCS write command
685 * @dsi: DSI peripheral device
687 * @data: buffer containing the command payload
688 * @len: command payload length
690 * This function will automatically choose the right data type depending on
691 * the command payload length.
693 * Return: The number of bytes successfully transmitted or a negative error
696 ssize_t
mipi_dsi_dcs_write(struct mipi_dsi_device
*dsi
, u8 cmd
,
697 const void *data
, size_t len
)
706 tx
= kmalloc(size
, M_DRM
, GFP_KERNEL
);
710 /* concatenate the DCS command byte and the payload */
712 memcpy(&tx
[1], data
, len
);
718 err
= mipi_dsi_dcs_write_buffer(dsi
, tx
, size
);
725 EXPORT_SYMBOL(mipi_dsi_dcs_write
);
728 * mipi_dsi_dcs_read() - send DCS read request command
729 * @dsi: DSI peripheral device
731 * @data: buffer in which to receive data
732 * @len: size of receive buffer
734 * Return: The number of bytes read or a negative error code on failure.
736 ssize_t
mipi_dsi_dcs_read(struct mipi_dsi_device
*dsi
, u8 cmd
, void *data
,
739 struct mipi_dsi_msg msg
= {
740 .channel
= dsi
->channel
,
741 .type
= MIPI_DSI_DCS_READ
,
748 return mipi_dsi_device_transfer(dsi
, &msg
);
750 EXPORT_SYMBOL(mipi_dsi_dcs_read
);
753 * mipi_dsi_dcs_nop() - send DCS nop packet
754 * @dsi: DSI peripheral device
756 * Return: 0 on success or a negative error code on failure.
758 int mipi_dsi_dcs_nop(struct mipi_dsi_device
*dsi
)
762 err
= mipi_dsi_dcs_write(dsi
, MIPI_DCS_NOP
, NULL
, 0);
768 EXPORT_SYMBOL(mipi_dsi_dcs_nop
);
772 * mipi_dsi_dcs_soft_reset() - perform a software reset of the display module
773 * @dsi: DSI peripheral device
775 * Return: 0 on success or a negative error code on failure.
777 int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device
*dsi
)
781 err
= mipi_dsi_dcs_write(dsi
, MIPI_DCS_SOFT_RESET
, NULL
, 0);
787 EXPORT_SYMBOL(mipi_dsi_dcs_soft_reset
);
790 * mipi_dsi_dcs_get_power_mode() - query the display module's current power
792 * @dsi: DSI peripheral device
793 * @mode: return location for the current power mode
795 * Return: 0 on success or a negative error code on failure.
797 int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device
*dsi
, u8
*mode
)
801 err
= mipi_dsi_dcs_read(dsi
, MIPI_DCS_GET_POWER_MODE
, mode
,
812 EXPORT_SYMBOL(mipi_dsi_dcs_get_power_mode
);
815 * mipi_dsi_dcs_get_pixel_format() - gets the pixel format for the RGB image
816 * data used by the interface
817 * @dsi: DSI peripheral device
818 * @format: return location for the pixel format
820 * Return: 0 on success or a negative error code on failure.
822 int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device
*dsi
, u8
*format
)
826 err
= mipi_dsi_dcs_read(dsi
, MIPI_DCS_GET_PIXEL_FORMAT
, format
,
837 EXPORT_SYMBOL(mipi_dsi_dcs_get_pixel_format
);
840 * mipi_dsi_dcs_enter_sleep_mode() - disable all unnecessary blocks inside the
841 * display module except interface communication
842 * @dsi: DSI peripheral device
844 * Return: 0 on success or a negative error code on failure.
846 int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device
*dsi
)
850 err
= mipi_dsi_dcs_write(dsi
, MIPI_DCS_ENTER_SLEEP_MODE
, NULL
, 0);
856 EXPORT_SYMBOL(mipi_dsi_dcs_enter_sleep_mode
);
859 * mipi_dsi_dcs_exit_sleep_mode() - enable all blocks inside the display
861 * @dsi: DSI peripheral device
863 * Return: 0 on success or a negative error code on failure.
865 int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device
*dsi
)
869 err
= mipi_dsi_dcs_write(dsi
, MIPI_DCS_EXIT_SLEEP_MODE
, NULL
, 0);
875 EXPORT_SYMBOL(mipi_dsi_dcs_exit_sleep_mode
);
878 * mipi_dsi_dcs_set_display_off() - stop displaying the image data on the
880 * @dsi: DSI peripheral device
882 * Return: 0 on success or a negative error code on failure.
884 int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device
*dsi
)
888 err
= mipi_dsi_dcs_write(dsi
, MIPI_DCS_SET_DISPLAY_OFF
, NULL
, 0);
894 EXPORT_SYMBOL(mipi_dsi_dcs_set_display_off
);
897 * mipi_dsi_dcs_set_display_on() - start displaying the image data on the
899 * @dsi: DSI peripheral device
901 * Return: 0 on success or a negative error code on failure
903 int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device
*dsi
)
907 err
= mipi_dsi_dcs_write(dsi
, MIPI_DCS_SET_DISPLAY_ON
, NULL
, 0);
913 EXPORT_SYMBOL(mipi_dsi_dcs_set_display_on
);
916 * mipi_dsi_dcs_set_column_address() - define the column extent of the frame
917 * memory accessed by the host processor
918 * @dsi: DSI peripheral device
919 * @start: first column of frame memory
920 * @end: last column of frame memory
922 * Return: 0 on success or a negative error code on failure.
924 int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device
*dsi
, u16 start
,
927 u8 payload
[4] = { start
>> 8, start
& 0xff, end
>> 8, end
& 0xff };
930 err
= mipi_dsi_dcs_write(dsi
, MIPI_DCS_SET_COLUMN_ADDRESS
, payload
,
937 EXPORT_SYMBOL(mipi_dsi_dcs_set_column_address
);
940 * mipi_dsi_dcs_set_page_address() - define the page extent of the frame
941 * memory accessed by the host processor
942 * @dsi: DSI peripheral device
943 * @start: first page of frame memory
944 * @end: last page of frame memory
946 * Return: 0 on success or a negative error code on failure.
948 int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device
*dsi
, u16 start
,
951 u8 payload
[4] = { start
>> 8, start
& 0xff, end
>> 8, end
& 0xff };
954 err
= mipi_dsi_dcs_write(dsi
, MIPI_DCS_SET_PAGE_ADDRESS
, payload
,
961 EXPORT_SYMBOL(mipi_dsi_dcs_set_page_address
);
964 * mipi_dsi_dcs_set_tear_off() - turn off the display module's Tearing Effect
965 * output signal on the TE signal line
966 * @dsi: DSI peripheral device
968 * Return: 0 on success or a negative error code on failure
970 int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device
*dsi
)
974 err
= mipi_dsi_dcs_write(dsi
, MIPI_DCS_SET_TEAR_OFF
, NULL
, 0);
980 EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_off
);
983 * mipi_dsi_dcs_set_tear_on() - turn on the display module's Tearing Effect
984 * output signal on the TE signal line.
985 * @dsi: DSI peripheral device
986 * @mode: the Tearing Effect Output Line mode
988 * Return: 0 on success or a negative error code on failure
990 int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device
*dsi
,
991 enum mipi_dsi_dcs_tear_mode mode
)
996 err
= mipi_dsi_dcs_write(dsi
, MIPI_DCS_SET_TEAR_ON
, &value
,
1003 EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_on
);
1006 * mipi_dsi_dcs_set_pixel_format() - sets the pixel format for the RGB image
1007 * data used by the interface
1008 * @dsi: DSI peripheral device
1009 * @format: pixel format
1011 * Return: 0 on success or a negative error code on failure.
1013 int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device
*dsi
, u8 format
)
1017 err
= mipi_dsi_dcs_write(dsi
, MIPI_DCS_SET_PIXEL_FORMAT
, &format
,
1024 EXPORT_SYMBOL(mipi_dsi_dcs_set_pixel_format
);
1027 * mipi_dsi_dcs_set_tear_scanline() - set the scanline to use as trigger for
1028 * the Tearing Effect output signal of the display module
1029 * @dsi: DSI peripheral device
1030 * @scanline: scanline to use as trigger
1032 * Return: 0 on success or a negative error code on failure
1034 int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device
*dsi
, u16 scanline
)
1036 u8 payload
[3] = { MIPI_DCS_SET_TEAR_SCANLINE
, scanline
>> 8,
1040 err
= mipi_dsi_generic_write(dsi
, payload
, sizeof(payload
));
1046 EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_scanline
);
1049 * mipi_dsi_dcs_set_display_brightness() - sets the brightness value of the
1051 * @dsi: DSI peripheral device
1052 * @brightness: brightness value
1054 * Return: 0 on success or a negative error code on failure.
1056 int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device
*dsi
,
1059 u8 payload
[2] = { brightness
& 0xff, brightness
>> 8 };
1062 err
= mipi_dsi_dcs_write(dsi
, MIPI_DCS_SET_DISPLAY_BRIGHTNESS
,
1063 payload
, sizeof(payload
));
1069 EXPORT_SYMBOL(mipi_dsi_dcs_set_display_brightness
);
1072 * mipi_dsi_dcs_get_display_brightness() - gets the current brightness value
1074 * @dsi: DSI peripheral device
1075 * @brightness: brightness value
1077 * Return: 0 on success or a negative error code on failure.
1079 int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device
*dsi
,
1084 err
= mipi_dsi_dcs_read(dsi
, MIPI_DCS_GET_DISPLAY_BRIGHTNESS
,
1085 brightness
, sizeof(*brightness
));
1095 EXPORT_SYMBOL(mipi_dsi_dcs_get_display_brightness
);
1097 static int mipi_dsi_drv_probe(struct device
*dev
)
1099 struct mipi_dsi_driver
*drv
= to_mipi_dsi_driver(dev
->driver
);
1100 struct mipi_dsi_device
*dsi
= to_mipi_dsi_device(dev
);
1102 return drv
->probe(dsi
);
1105 static int mipi_dsi_drv_remove(struct device
*dev
)
1107 struct mipi_dsi_driver
*drv
= to_mipi_dsi_driver(dev
->driver
);
1108 struct mipi_dsi_device
*dsi
= to_mipi_dsi_device(dev
);
1110 return drv
->remove(dsi
);
1113 static void mipi_dsi_drv_shutdown(struct device
*dev
)
1115 struct mipi_dsi_driver
*drv
= to_mipi_dsi_driver(dev
->driver
);
1116 struct mipi_dsi_device
*dsi
= to_mipi_dsi_device(dev
);
1122 * mipi_dsi_driver_register_full() - register a driver for DSI devices
1123 * @drv: DSI driver structure
1124 * @owner: owner module
1126 * Return: 0 on success or a negative error code on failure.
1128 int mipi_dsi_driver_register_full(struct mipi_dsi_driver
*drv
,
1129 struct module
*owner
)
1131 drv
->driver
.bus
= &mipi_dsi_bus_type
;
1132 drv
->driver
.owner
= owner
;
1135 drv
->driver
.probe
= mipi_dsi_drv_probe
;
1137 drv
->driver
.remove
= mipi_dsi_drv_remove
;
1139 drv
->driver
.shutdown
= mipi_dsi_drv_shutdown
;
1141 return driver_register(&drv
->driver
);
1143 EXPORT_SYMBOL(mipi_dsi_driver_register_full
);
1146 * mipi_dsi_driver_unregister() - unregister a driver for DSI devices
1147 * @drv: DSI driver structure
1149 * Return: 0 on success or a negative error code on failure.
1151 void mipi_dsi_driver_unregister(struct mipi_dsi_driver
*drv
)
1153 driver_unregister(&drv
->driver
);
1155 EXPORT_SYMBOL(mipi_dsi_driver_unregister
);
1157 static int __init
mipi_dsi_bus_init(void)
1159 return bus_register(&mipi_dsi_bus_type
);
1161 postcore_initcall(mipi_dsi_bus_init
);
1164 MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>");
1165 MODULE_DESCRIPTION("MIPI DSI Bus");