1 /**************************************************************************
5 * Copyright 2015 Samsung Electronics co., Ltd. All Rights Reserved.
7 * Contact: Eunchul Kim <chulspro.kim@samsung.com>,
8 * JinYoung Jeon <jy0.jeon@samsung.com>,
9 * Taeheon Kim <th908.kim@samsung.com>,
10 * YoungJun Cho <yj44.cho@samsung.com>,
11 * SooChan Lim <sc1.lim@samsung.com>,
12 * Boram Park <sc1.lim@samsung.com>
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34 **************************************************************************/
36 #ifndef _TDM_BACKEND_H_
37 #define _TDM_BACKEND_H_
39 #include <tbm_surface.h>
40 #include <tbm_surface_queue.h>
42 #include "tdm_types.h"
50 * @brief The backend header file of TDM to implement a TDM backend module.
53 * #include <tdm_backend.h>
58 * @brief The backend module data
60 * The init() function of #tdm_backend_module returns the backend module data.
61 * And it will be passed to display functions of #tdm_func_display.
62 * @see tdm_backend_module, tdm_backend_module
64 typedef void tdm_backend_data;
67 * @brief The output status handler
68 * @details This handler will be called when the status of a output object is
71 typedef void (*tdm_output_status_handler)(tdm_output *output,
72 tdm_output_conn_status status,
76 * @brief The output dpms handler
77 * @details This handler will be called when the dpms of a output object is
80 typedef void (*tdm_output_dpms_handler)(tdm_output *output,
85 * @brief The display capabilities structure of a backend module
86 * @see The display_get_capability() function of #tdm_func_display
88 typedef struct _tdm_caps_display {
89 int max_layer_count; /**< The maximum layer count */
93 * @brief The capabilities structure of a output object
94 * @see The output_get_capability() function of #tdm_func_output
96 typedef struct _tdm_caps_output {
97 char maker[TDM_NAME_LEN]; /**< The output maker */
98 char model[TDM_NAME_LEN]; /**< The output model */
99 char name[TDM_NAME_LEN]; /**< The output name */
101 tdm_output_conn_status status; /**< The connection status */
102 tdm_output_type type; /**< The connection type */
103 unsigned int type_id; /**< The connection type id */
105 unsigned int mode_count; /**< The count of available modes */
107 *modes; /**< The @b newly-allocated array of modes. will be freed in frontend. */
109 unsigned int prop_count; /**< The count of available properties */
110 tdm_prop *props; /**< The @b newly-allocated array of properties. will be freed in frontend. */
112 unsigned int mmWidth; /**< The physical width (milimeter) */
113 unsigned int mmHeight; /**< The physical height (milimeter) */
114 unsigned int subpixel; /**< The subpixel */
116 int min_w; /**< The minimun width */
117 int min_h; /**< The minimun height */
118 int max_w; /**< The maximum width */
119 int max_h; /**< The maximum height */
120 int preferred_align; /**< The prefered align */
122 tdm_output_capability capabilities; /**< The capabilities of output. @since 1.4.1 */
124 int cursor_min_w; /**< The minimun width. @since 1.5.0 */
125 int cursor_min_h; /**< The minimun height. @since 1.5.0 */
126 int cursor_max_w; /**< The maximum width. @since 1.5.0 */
127 int cursor_max_h; /**< The maximum height. @since 1.5.0 */
128 int cursor_preferred_align; /**< The prefered align. @since 1.5.0 */
132 * @brief The capabilities structure of a layer object
133 * @see The layer_get_capability() function of #tdm_func_layer
135 typedef struct _tdm_caps_layer {
136 tdm_layer_capability capabilities; /**< The capabilities of layer */
140 * GRAPHIC layers are non-changeable. The zpos of GRAPHIC layers starts
141 * from 0. If there are 4 GRAPHIC layers, The zpos SHOULD be 0, 1, 2, 3.\n
142 * But the zpos of VIDEO layer is changeable by layer_set_video_pos() function
143 * of #tdm_func_layer. And The zpos of VIDEO layers is less than GRAPHIC
144 * layers or more than GRAPHIC layers.
145 * ie, ..., -2, -1, 4, 5, ... (if 0 <= GRAPHIC layer's zpos < 4).
146 * The zpos of VIDEO layers is @b relative. It doesn't need to start
147 * from -1 or 4. Let's suppose that there are two VIDEO layers.
148 * One has -2 zpos. Another has -4 zpos. Then -2 Video layer is higher
149 * than -4 VIDEO layer.
153 unsigned int format_count; /**< The count of available formats */
155 *formats; /**< The @b newly-allocated array of formats. will be freed in frontend. */
157 unsigned int prop_count; /**< The count of available properties */
158 tdm_prop *props; /**< The @b newly-allocated array of properties. will be freed in frontend. */
162 * @brief The capabilities structure of a pp object
163 * @see The display_get_pp_capability() function of #tdm_func_display
165 typedef struct _tdm_caps_pp {
166 tdm_pp_capability capabilities; /**< The capabilities of pp */
168 unsigned int format_count; /**< The count of available formats */
170 *formats; /**< The @b newly-allocated array. will be freed in frontend. */
172 int min_w; /**< The minimun width */
173 int min_h; /**< The minimun height */
174 int max_w; /**< The maximum width */
175 int max_h; /**< The maximum height */
176 int preferred_align; /**< The prefered align */
178 /**< The attach count which a PP object can handle. @since 1.2.0 */
179 int max_attach_count;
183 * @brief The capabilities structure of a capture object
184 * @see The display_get_capture_capability() function of #tdm_func_display
186 typedef struct _tdm_caps_capture {
187 tdm_capture_capability capabilities; /**< The capabilities of capture */
189 unsigned int format_count; /**< The count of available formats */
191 *formats; /**< The @b newly-allocated array of formats. will be freed in frontend. */
193 int min_w; /**< The minimun width */
194 int min_h; /**< The minimun height */
195 int max_w; /**< The maximum width */
196 int max_h; /**< The maximum height */
197 int preferred_align; /**< The prefered align */
199 /**< The attach count which a capture object can handle. @since 1.2.0 */
200 int max_attach_count;
204 * @brief The display functions for a backend module.
206 typedef struct _tdm_func_display {
208 * @brief Get the display capabilities of a backend module
209 * @param[in] bdata The backend module data
210 * @param[out] caps The display capabilities of a backend module
211 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
213 * A backend module @b SHOULD implement this function. TDM calls this function
214 * not only at the initial time, but also at the update time when new output
216 * If a hardware has the restriction of the number of max usable layer count,
217 * a backend module can set the max count to max_layer_count of #tdm_caps_display
220 tdm_error (*display_get_capability)(tdm_backend_data *bdata, tdm_caps_display *caps);
223 * @brief Get the pp capabilities of a backend module
224 * @param[in] bdata The backend module data
225 * @param[out] caps The pp capabilities of a backend module
226 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
227 * @see tdm_backend_register_func_pp
229 * TDM calls this function not only at the initial time, but also at the update
230 * time when new output is connected.\n
231 * A backend module doesn't need to implement this function if a hardware
232 * doesn't have the memory-to-memory converting device. Otherwise, a backend module
233 * @b SHOULD fill the #tdm_caps_pp data. #tdm_caps_pp contains the hardware
234 * restriction information which a converting device can handle. ie, format, size, etc.
236 tdm_error (*display_get_pp_capability)(tdm_backend_data *bdata, tdm_caps_pp *caps);
239 * @brief Get the capture capabilities of a backend module
240 * @param[in] bdata The backend module data
241 * @param[out] caps The capture capabilities of a backend module
242 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
243 * @see tdm_backend_register_func_capture
245 * TDM calls this function not only at the initial time, but also at the update
246 * time when new output is connected.\n
247 * A backend module doesn't need to implement this function if a hardware
248 * doesn't have the capture device. Otherwise, a backend module @b SHOULD fill the
249 * #tdm_caps_capture data. #tdm_caps_capture contains the hardware restriction
250 * information which a capture device can handle. ie, format, size, etc.
252 tdm_error (*display_get_capture_capability)(tdm_backend_data *bdata, tdm_caps_capture *caps);
255 * @brief Get a output array of a backend module
256 * @param[in] bdata The backend module data
257 * @param[out] count The count of outputs
258 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
259 * @return A output array which is @b newly-allocated
260 * @see tdm_backend_register_func_capture
262 * A backend module @b SHOULD implement this function. TDM calls this function
263 * not only at the initial time, but also at the update time when new output
265 * A backend module @b SHOULD return the @b newly-allocated array which contains
266 * "tdm_output*" data. It will be freed in frontend.
270 * drm_display_get_outputs(tdm_backend_data *bdata, int *count, tdm_error *error)
272 * tdm_drm_data *drm_data = bdata;
273 * tdm_drm_output_data *output_data = NULL;
274 * tdm_output **outputs;
278 * LIST_FOR_EACH_ENTRY(output_data, &drm_data->output_list, link)
283 * if (error) *error = TDM_ERROR_NONE;
287 * // will be freed in frontend
288 * outputs = calloc(*count, sizeof(tdm_drm_output_data*));
292 * if (error) *error = TDM_ERROR_OUT_OF_MEMORY;
297 * LIST_FOR_EACH_ENTRY(output_data, &drm_data->output_list, link)
298 * outputs[i++] = output_data;
300 * if (error) *error = TDM_ERROR_NONE;
306 tdm_output **(*display_get_outputs)(tdm_backend_data *bdata, int *count,
310 * @brief Get the file descriptor of a backend module
311 * @param[in] bdata The backend module data
312 * @param[out] fd The fd of a backend module
313 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
314 * @see display_handle_events() function of #tdm_func_display
316 * A backend module can return epoll's fd which is watching the backend device one more fds.
318 tdm_error (*display_get_fd)(tdm_backend_data *bdata, int *fd);
321 * @brief Handle the events which happens on the fd of a backend module
322 * @param[in] bdata The backend module data
323 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
325 tdm_error (*display_handle_events)(tdm_backend_data *bdata);
328 * @brief Create a pp object of a backend module
329 * @param[in] bdata The backend module data
330 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
331 * @return A pp object
332 * @see pp_destroy() function of #tdm_func_pp
334 * A backend module doesn't need to implement this function if a hardware
335 * doesn't have the memory-to-memory converting device.
337 tdm_pp *(*display_create_pp)(tdm_backend_data *bdata, tdm_error *error);
339 void (*reserved1)(void);
340 void (*reserved2)(void);
341 void (*reserved3)(void);
342 void (*reserved4)(void);
343 void (*reserved5)(void);
344 void (*reserved6)(void);
345 void (*reserved7)(void);
346 void (*reserved8)(void);
350 * @brief The output functions for a backend module.
352 typedef struct _tdm_func_output {
354 * @brief Get the capabilities of a output object
355 * @param[in] output A output object
356 * @param[out] caps The capabilities of a output object
357 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
359 * A backend module @b SHOULD implement this function. TDM calls this function
360 * not only at the initial time, but also at the update time when new output
362 * #tdm_caps_output contains connection status, modes, avaiable properties,
363 * size restriction information, etc.
365 tdm_error (*output_get_capability)(tdm_output *output, tdm_caps_output *caps);
368 * @brief Get a layer array of a output object
369 * @param[in] output A output object
370 * @param[out] count The count of layers
371 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
372 * @return A layer array which is @b newly-allocated
374 * A backend module @b SHOULD implement this function. TDM calls this function
375 * not only at the initial time, but also at the update time when new output
377 * A backend module @b SHOULD return the @b newly-allocated array which contains
378 * "tdm_layer*" data. It will be freed in frontend.
380 tdm_layer **(*output_get_layers)(tdm_output *output, int *count,
384 * @brief Set the property which has a given id
385 * @param[in] output A output object
386 * @param[in] id The property id
387 * @param[in] value The value
388 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
390 tdm_error (*output_set_property)(tdm_output *output, unsigned int id,
394 * @brief Get the property which has a given id
395 * @param[in] output A output object
396 * @param[in] id The property id
397 * @param[out] value The value
398 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
400 tdm_error (*output_get_property)(tdm_output *output, unsigned int id,
404 * @brief Wait for VBLANK
405 * @param[in] output A output object
406 * @param[in] interval vblank interval
407 * @param[in] sync 0: asynchronous, 1:synchronous
408 * @param[in] user_data The user data
409 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
410 * @see output_set_vblank_handler, tdm_output_vblank_handler
412 * If this function returns TDM_ERROR_NONE, a backend module @b SHOULD call
413 * a user vblank handler with the user data of this function after interval
416 tdm_error (*output_wait_vblank)(tdm_output *output, int interval, int sync,
420 * @brief Set a user vblank handler
421 * @param[in] output A output object
422 * @param[in] func A user vblank handler
423 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
425 tdm_error (*output_set_vblank_handler)(tdm_output *output,
426 tdm_output_vblank_handler func);
429 * @brief Commit changes for a output object
430 * @param[in] output A output object
431 * @param[in] sync 0: asynchronous, 1:synchronous
432 * @param[in] user_data The user data
433 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
434 * @see output_set_commit_handler, tdm_output_commit_handler
436 * When this function is called, a backend module @b SHOULD apply the all
437 * changes of the given output object to screen as well as the layer changes
439 * If this function returns TDM_ERROR_NONE, a backend module @b SHOULD call
440 * a user commit handler with the user data of this function after all
441 * changes of the given output object are applied.
443 tdm_error (*output_commit)(tdm_output *output, int sync, void *user_data);
446 * @brief Set a user commit handler
447 * @param[in] output A output object
448 * @param[in] func A user commit handler
449 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
451 tdm_error (*output_set_commit_handler)(tdm_output *output,
452 tdm_output_commit_handler func);
455 * @brief Set DPMS of a output object synchronously
456 * @param[in] output A output object
457 * @param[in] dpms_value DPMS value
458 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
460 tdm_error (*output_set_dpms)(tdm_output *output, tdm_output_dpms dpms_value);
463 * @brief Get DPMS of a output object
464 * @param[in] output A output object
465 * @param[out] dpms_value DPMS value
466 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
468 tdm_error (*output_get_dpms)(tdm_output *output, tdm_output_dpms *dpms_value);
471 * @brief Set one of available modes of a output object
472 * @param[in] output A output object
473 * @param[in] mode A output mode
474 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
476 tdm_error (*output_set_mode)(tdm_output *output, const tdm_output_mode *mode);
479 * @brief Get the mode of a output object
481 * @param[in] output A output object
482 * @param[out] mode A output mode
483 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
485 tdm_error (*output_get_mode)(tdm_output *output, const tdm_output_mode **mode);
488 * @brief Create a capture object of a output object
489 * @param[in] output A output object
490 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
491 * @return A capture object
492 * @see capture_destroy() function of #tdm_func_capture
494 * A backend module doesn't need to implement this function if a hardware
495 * doesn't have the capture device.
497 tdm_capture *(*output_create_capture)(tdm_output *output, tdm_error *error);
500 * @brief Set a output connection status handler
501 * @details A backend module need to call the output status handler when the
502 * output connection status has been changed to let the TDM frontend know
504 * @param[in] output A output object
505 * @param[in] func A output status handler
506 * @param[in] user_data The user data
507 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
510 tdm_error (*output_set_status_handler)(tdm_output *output,
511 tdm_output_status_handler func,
515 * @brief Set a output dpms handler
516 * @details This function can be NULL if an output doesn't support asynchronous
517 * DPMS control. Otherwise, a backend module needs to call the output dpms handler
518 * to let the TDM frontend know the output DPMS change indeed.
519 * @param[in] output A output object
520 * @param[in] func A output dpms handler
521 * @param[in] user_data The user data
522 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
523 * @see #output_set_dpms_async, #TDM_OUTPUT_CAPABILITY_ASYNC_DPMS
526 tdm_error (*output_set_dpms_handler)(tdm_output *output,
527 tdm_output_dpms_handler func,
531 * @brief Set DPMS of a output object asynchronously
532 * @param[in] output A output object
533 * @details This function can be NULL if an output doesn't support asynchronous
534 * DPMS control. Otherwise, an output should have #TDM_OUTPUT_CAPABILITY_ASYNC_DPMS
535 * flags which #output_get_capability returns. And if a output dpms handler is added with
536 * #output_set_dpms_handler, a backend module needs to call the output dpms handler
537 * to let the TDM frontend know the output DPMS change indeed.
538 * @param[in] dpms_value DPMS value
539 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
540 * @see #output_set_dpms_handler, #TDM_OUTPUT_CAPABILITY_ASYNC_DPMS
543 tdm_error (*output_set_dpms_async)(tdm_output *output, tdm_output_dpms dpms_value);
546 * @brief Creates a new window on the given display.
547 * @param[in] output A output object
548 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
549 * @return A created window object
552 tdm_hwc_window *(*output_hwc_create_window)(tdm_output *output, tdm_error *error);
555 * @brief Destroys the given window.
556 * @param[in] output A output object
557 * @param[in] window the pointer of the window to destroy
558 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
561 tdm_error (*output_hwc_destroy_window)(tdm_output *output, tdm_hwc_window *hwc_window);
564 * @brief Set the client(relative to the TDM) target buffer
565 * @details Sets the buffer which will receive the output of client composition.
566 * Window marked as TDM_COMPOSITION_CLIENT or TDM_COMPOSITION_DEVICE_CANDIDATE
567 * will be composited into this buffer prior to the call to output_commit(),
568 * and windows not marked as TDM_COMPOSITION_CLIENT and
569 * TDM_COMPOSITION_DEVICE_CANDIDATE should be composited with this buffer by the
572 * The buffer handle provided may be null if no windows are being composited by
573 * the client. This must not result in an error (unless an invalid display
574 * handle is also provided).
576 * The damage parameter describes a buffer damage region as defined in the
577 * description of hwc_window_set_buffer_damage().
579 * List of composited hwc_windows (hwc_windows which buffers are presented on #target_buffer)
580 * will be passed along with #target_buffer to allow tdm to make the smooth transition
581 * from a DEVICE type to a CLIENT type.
583 * Will be called before output_commit() if any of the layers are marked as
584 * TDM_COMPOSITION_CLIENT or TDM_COMPOSITION_DEVICE_CANDIDATE. If no layers are
585 * so marked, then it is not necessary to call this function. It is not necessary
586 * to call output_hwc_validate() after changing the target through this function.
587 * @param[in] output A output object
588 * @param[in] target The new target buffer
589 * @param[in] damage The buffer damage region
590 * @param[in] composited_wnds The array of composited hwc_wnds
591 * @param[in] num_wnds The size of #composited_wnds array
592 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
595 tdm_error (*output_hwc_set_client_target_buffer)(tdm_output *output, tbm_surface_h target_buffer, tdm_hwc_region damage);
598 * @brief Unset the client(relative to the TDM) target buffer
600 * @param[in] output A output object
601 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
604 tdm_error (*output_hwc_unset_client_target_buffer)(tdm_output *output);
607 * @brief Validate the output
608 * @details Instructs the device to inspect all of the layer state and
609 * determine if there are any composition type changes necessary before
610 * presenting the output. Permitted changes are described in the definition
611 * of tdm_composition_t above.
612 * @param[in] output A output object
613 * @param[out] num_types The number of composition type changes required by
614 * the device; if greater than 0, the client must either set and validate new
615 * types, or call output_hwc_accept_changes() to accept the changes returned by
616 * output_hwc_get_changed_composition_types(); must be the same as the number of
617 * changes returned by output_hwc_get_changed_composition_types (see the
618 * declaration of that function for more information); pointer will be non-NULL
619 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
622 tdm_error (*output_hwc_validate)(tdm_output *output, tdm_hwc_window **composited_wnds, uint32_t num_wnds,
623 uint32_t *num_types);
626 * @brief Get changed composition types
627 * @details Retrieves the windows for which the device requires a different
628 * composition type than had been set prior to the last call to output_hwc_validate().
629 * The client will either update its state with these types and call
630 * output_hwc_accept_changes, or will set new types and attempt to validate the
632 * layers and types may be NULL to retrieve the number of elements which
633 * will be returned. The number of elements returned must be the same as the
634 * value returned in num_types from the last call to output_hwc_validate().
635 * @param[in] output A output object
636 * @param[out] num_elements If windows or types were NULL, the number of layers
637 * and types which would have been returned; if both were non-NULL, the
638 * number of elements returned in layers and types, which must not exceed
639 * the value stored in num_elements prior to the call; pointer will be
641 * @param[out] windows An array of windows
642 * @param[out] composition_types An array of composition types, each
643 * corresponding to an element of windows
644 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
647 tdm_error (*output_hwc_get_changed_composition_types)(tdm_output *output,
648 uint32_t *num_elements,
649 tdm_hwc_window **hwc_window,
650 tdm_hwc_window_composition *composition_types);
652 * @brief Accepts the changes required by the device
653 * @details Accepts the changes required by the device from the previous
654 * output_hwc_validate() call (which may be queried using
655 * output_get_chaged_composition_types()) and revalidates the display. This
656 * function is equivalent to requesting the changed types from
657 * output_get_chaged_composition_types(), setting those types on the
658 * corresponding windows, and then calling output_hwc_validate again.
659 * After this call it must be valid to present this display. Calling this after
660 * output_hwc_validate() returns 0 changes must succeed with TDM_ERROR_NONE, but
661 * should have no other effect.
662 * @param[in] output A output object
663 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
666 tdm_error (*output_hwc_accept_changes)(tdm_output *output);
669 * @brief Get a target buffer queue
670 * @param[in] output A output object
671 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
672 * @return A buffer queue
675 tbm_surface_queue_h (*output_hwc_get_target_buffer_queue)(tdm_output *output,
679 * @brief Get the supported format array for video hwc windows of a output object.
680 * @param[in] output A output object
681 * @param[out] formats The available format array
682 * @param[out] count The count of formats
683 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
685 tdm_error (*output_hwc_get_video_supported_formats)(tdm_layer *layer,
686 const tbm_format **formats, int *count);
689 * @brief Creates a new video window on the given output.
690 * @param[in] output A output object
691 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
692 * @return A created window object. If the video abilities isn't accessed return NULL
695 tdm_hwc_window *(*output_hwc_create_video_window)(tdm_output *output, tdm_error *error);
697 void (*reserved5)(void);
698 void (*reserved6)(void);
699 void (*reserved7)(void);
700 void (*reserved8)(void);
704 * @brief The layer functions for a backend module.
706 typedef struct _tdm_func_layer {
708 * @brief Get the capabilities of a layer object
709 * @param[in] layer A layer object
710 * @param[out] caps The capabilities of a layer object
711 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
713 * A backend module @b SHOULD implement this function. TDM calls this function
714 * not only at the initial time, but also at the update time when new output
716 * #tdm_caps_layer contains avaiable formats/properties, zpos information, etc.
718 tdm_error (*layer_get_capability)(tdm_layer *layer, tdm_caps_layer *caps);
721 * @brief Set the property which has a given id.
722 * @param[in] layer A layer object
723 * @param[in] id The property id
724 * @param[in] value The value
725 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
727 tdm_error (*layer_set_property)(tdm_layer *layer, unsigned int id,
731 * @brief Get the property which has a given id.
732 * @param[in] layer A layer object
733 * @param[in] id The property id
734 * @param[out] value The value
735 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
737 tdm_error (*layer_get_property)(tdm_layer *layer, unsigned int id,
741 * @brief Set the geometry information to a layer object
742 * @param[in] layer A layer object
743 * @param[in] info The geometry information
744 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
745 * @see output_commit() function of #tdm_func_output
747 * A backend module would apply the geometry information when the output object
748 * of a layer object is committed.
750 tdm_error (*layer_set_info)(tdm_layer *layer, tdm_info_layer *info);
753 * @brief Get the geometry information to a layer object
754 * @param[in] layer A layer object
755 * @param[out] info The geometry information
756 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
758 tdm_error (*layer_get_info)(tdm_layer *layer, tdm_info_layer *info);
761 * @brief Set a TDM buffer to a layer object
762 * @param[in] layer A layer object
763 * @param[in] buffer A TDM buffer
764 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
765 * @see output_commit() function of #tdm_func_output
767 * A backend module would show a TDM buffer on screen when the output object
768 * of a layer object is committed.
770 tdm_error (*layer_set_buffer)(tdm_layer *layer, tbm_surface_h buffer);
773 * @brief Unset a TDM buffer from a layer object
774 * @param[in] layer A layer object
775 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
777 * A backend module @b SHOULD remove the current showing buffer from screen.
779 tdm_error (*layer_unset_buffer)(tdm_layer *layer);
782 * @brief Set the zpos for a VIDEO layer object
783 * @param[in] layer A layer object
784 * @param[in] zpos z-order
785 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
786 * @see tdm_caps_layer, tdm_layer_capability
788 * A backend module doesn't need to implement this function if a backend
789 * module doesn't have VIDEO layers.\n
790 * This function is for VIDEO layers.
791 * GRAPHIC layers are non-changeable. The zpos of GRAPHIC layers starts
792 * from 0. If there are 4 GRAPHIC layers, The zpos SHOULD be 0, 1, 2, 3.\n
793 * But the zpos of VIDEO layer is changeable. And The zpos of VIDEO layers
794 * is less than GRAPHIC layers or more than GRAPHIC layers.
795 * ie, ..., -2, -1, 4, 5, ... (if 0 <= GRAPHIC layer's zpos < 4).
796 * The zpos of VIDEO layers is @b relative. It doesn't need to start
797 * from -1 or 4. Let's suppose that there are two VIDEO layers.
798 * One has -2 zpos. Another has -4 zpos. Then -2 Video layer is higher
799 * than -4 VIDEO layer.
801 tdm_error (*layer_set_video_pos)(tdm_layer *layer, int zpos);
804 * @brief Create a capture object of a layer object
805 * @param[in] output A output object
806 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
807 * @return A capture object
808 * @see capture_destroy() function of #tdm_func_capture
810 * A backend module doesn't need to implement this function if a hardware
811 * doesn't have the capture device.
813 tdm_capture *(*layer_create_capture)(tdm_layer *layer, tdm_error *error);
816 * @brief Get buffer flags which the layer can support.
817 * @param[in] layer A layer object
818 * @param[out] flags The buffer flags which should be the tbm_bo flags
819 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
821 tdm_error (*layer_get_buffer_flags)(tdm_layer *layer, unsigned int *flags);
823 void (*reserved1)(void);
824 void (*reserved2)(void);
825 void (*reserved3)(void);
826 void (*reserved4)(void);
827 void (*reserved5)(void);
828 void (*reserved6)(void);
829 void (*reserved7)(void);
833 * @brief The window functions for a backend module.
836 typedef struct _tdm_func_window {
838 * @brief Get a buffer queue for the window object
839 * @param[in] hwc_window A window object
840 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
841 * @return A buffer queue
843 tbm_surface_queue_h (*hwc_window_get_tbm_buffer_queue)(tdm_hwc_window *hwc_window,
847 * @brief Sets the desired composition type of the given window.
848 * @details During output_hwc_validate(), the device may request changes to
849 * the composition types of any of the layers as described in the definition
850 * of tdm_hwc_window_composition_t above.
851 * @param[in] hwc_window A window object
852 * @param[in] composition_type The new composition type
853 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
855 tdm_error (*hwc_window_set_composition_type)(tdm_hwc_window *hwc_window,
856 tdm_hwc_window_composition composition_type);
859 * @brief Set the buffer damage
860 * @details Provides the region of the source buffer which has been modified
861 * since the last frame. This region does not need to be validated before
862 * calling output_commit().
863 * Once set through this function, the damage region remains the same until a
864 * subsequent call to this function.
865 * If damage.num_rects > 0, then it may be assumed that any portion of the source
866 * buffer not covered by one of the rects has not been modified this frame. If
867 * damage.num_rects == 0, then the whole source buffer must be treated as if it
869 * If the layer's contents are not modified relative to the prior frame, damage
870 * will contain exactly one empty rect([0, 0, 0, 0]).
871 * The damage rects are relative to the pre-transformed buffer, and their origin
872 * is the top-left corner. They will not exceed the dimensions of the latched
874 * @param[in] hwc_window A window object
875 * @param[in] damage The new buffer damage region
876 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
878 tdm_error (*hwc_window_set_buffer_damage)(tdm_hwc_window *hwc_window,
879 tdm_hwc_region damage);
882 * @brief Set the information to a window object
883 * @details The information will be applied when the output object
884 * of a layer object is committed.
885 * @param[in] hwc_window A window object
886 * @param[in] info The geometry information
887 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
889 tdm_error (*hwc_window_set_info)(tdm_hwc_window *hwc_window,
890 tdm_hwc_window_info *info);
893 * @brief Set a TDM buffer to a window object
894 * @details A TDM buffer will be applied when the output object
895 * of a layer object is committed.
896 * @param[in] hwc_window A window object
897 * @param[in] buffer A TDM buffer
898 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
900 * Implementation should return #TDM_ERROR_BUSY if #hwc_window can't
901 * be updated right now, this won't be interpreted like some critical
904 tdm_error (*hwc_window_set_buffer)(tdm_hwc_window *hwc_window,
905 tbm_surface_h buffer);
908 * @brief Unset a TDM buffer to a window object
909 * @details A TDM buffer will be applied when the output object
910 * of a layer object is committed.
911 * @param[in] hwc_window A window object
912 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
914 * Implementation should return #TDM_ERROR_BUSY if #hwc_window can't
915 * be updated right now, this won't be interpreted like some critical
918 tdm_error (*hwc_window_unset_buffer)(tdm_hwc_window *hwc_window);
921 * @brief Set a flags to a window object
922 * @param[in] hwc_window A window object
923 * @param[in] flags A hwc_window flags
924 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
926 tdm_error (*hwc_window_set_flags)(tdm_hwc_window *hwc_window,
927 tdm_hwc_window_flag flags);
930 * @brief Unset a flags from a window object
931 * @param[in] hwc_window A window object
932 * @param[in] flags A hwc_window flags
933 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
935 tdm_error (*hwc_window_unset_flags)(tdm_hwc_window *hwc_window,
936 tdm_hwc_window_flag flags);
939 * @brief Get the window video capability
940 * @param[in] hwc_window A window object
941 * @param[out] video_capability A hwc window video capability
942 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
944 tdm_error (*hwc_window_video_get_capability)(tdm_hwc_window *hwc_window,
945 tdm_hwc_window_video_capability *video_capability);
948 * @brief Get the available property array of a video hwc window object.
949 * @param[in] hwc window A video hwc window object
950 * @param[out] props The available property array
951 * @param[out] count The count of properties
952 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
954 tdm_error (*hwc_window_video_get_available_properties)(
955 tdm_hwc_window *hwc_window,
956 const tdm_prop **props, int *count);
959 * @brief Get the property which has a given id.
960 * @param[in] hwc window A video hwc window object
961 * @param[in] id The property id
962 * @param[out] value The value
963 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
965 tdm_error (*hwc_window_video_get_property)(tdm_hwc_window *hwc_window,
966 uint32_t id, tdm_value *value);
969 * @brief Set the property which has a given id.
970 * @param[in] hwc window A video hwc window object
971 * @param[in] id The property id
972 * @param[in] value The value
973 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
975 tdm_error (*hwc_window_video_set_property)(tdm_hwc_window *hwc_window,
976 uint32_t id, tdm_value value);
978 } tdm_func_hwc_window;
981 * @brief The pp functions for a backend module.
983 typedef struct _tdm_func_pp {
985 * @brief Destroy a pp object
986 * @param[in] pp A pp object
987 * @see display_create_pp() function of #tdm_func_display
989 void (*pp_destroy)(tdm_pp *pp);
992 * @brief Set the geometry information to a pp object
993 * @param[in] pp A pp object
994 * @param[in] info The geometry information
995 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
996 * @see pp_commit() function of #tdm_func_pp
998 * A backend module would apply the geometry information when committed.
1000 tdm_error (*pp_set_info)(tdm_pp *pp, tdm_info_pp *info);
1003 * @brief Attach a source buffer and a destination buffer to a pp object
1004 * @param[in] pp A pp object
1005 * @param[in] src A source buffer
1006 * @param[in] dst A destination buffer
1007 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1008 * @see pp_set_info() function of #tdm_func_pp
1009 * @see pp_commit() function of #tdm_func_pp
1010 * @see pp_set_done_handler, tdm_pp_done_handler
1012 * A backend module converts the image of a source buffer to a destination
1013 * buffer when committed. The size/crop/transform information is set via
1014 * #pp_set_info() of #tdm_func_pp. When done, a backend module @b SHOULD
1015 * return the source/destination buffer via tdm_pp_done_handler.
1017 tdm_error (*pp_attach)(tdm_pp *pp, tbm_surface_h src, tbm_surface_h dst);
1020 * @brief Commit changes for a pp object
1021 * @param[in] pp A pp object
1022 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1024 tdm_error (*pp_commit)(tdm_pp *pp);
1027 * @brief Set a user done handler to a pp object
1028 * @param[in] pp A pp object
1029 * @param[in] func A user done handler
1030 * @param[in] user_data user data
1031 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1033 * A backend module @b SHOULD call #tdm_pp_done_handler when converintg a image is done.
1035 tdm_error (*pp_set_done_handler)(tdm_pp *pp, tdm_pp_done_handler func,
1038 void (*reserved1)(void);
1039 void (*reserved2)(void);
1040 void (*reserved3)(void);
1041 void (*reserved4)(void);
1042 void (*reserved5)(void);
1043 void (*reserved6)(void);
1044 void (*reserved7)(void);
1045 void (*reserved8)(void);
1049 * @brief The capture functions for a backend module.
1051 typedef struct _tdm_func_capture {
1053 * @brief Destroy a capture object
1054 * @param[in] capture A capture object
1055 * @see output_create_capture() function of #tdm_func_output
1056 * @see layer_create_capture() function of #tdm_func_layer
1058 void (*capture_destroy)(tdm_capture *capture);
1061 * @brief Set the geometry information to a capture object
1062 * @param[in] capture A capture object
1063 * @param[in] info The geometry information
1064 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1065 * @see capture_commit() function of #tdm_func_capture
1067 * A backend module would apply the geometry information when committed.
1069 tdm_error (*capture_set_info)(tdm_capture *capture, tdm_info_capture *info);
1072 * @brief Attach a TDM buffer to a capture object
1073 * @details When capture_commit() function is called, a backend module starts
1074 * to dump a output or a layer to a TDM buffer.
1075 * @param[in] capture A capture object
1076 * @param[in] buffer A TDM buffer
1077 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1078 * @see capture_set_info() function of #tdm_func_capture
1079 * @see capture_commit() function of #tdm_func_capture
1080 * @see capture_set_done_handler, tdm_capture_done_handler
1082 * A backend module starts to dump a output or a layer to to a TDM buffer when
1083 * committed. The size/crop/transform information is set via #capture_set_info()
1084 * of #tdm_func_capture. When done, a backend module @b SHOULD return the TDM
1085 * buffer via tdm_capture_done_handler.
1087 tdm_error (*capture_attach)(tdm_capture *capture, tbm_surface_h buffer);
1090 * @brief Commit changes for a capture object
1091 * @param[in] capture A capture object
1092 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1094 tdm_error (*capture_commit)(tdm_capture *capture);
1097 * @brief Set a user done handler to a capture object
1098 * @param[in] capture A capture object
1099 * @param[in] func A user done handler
1100 * @param[in] user_data user data
1101 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1103 * A backend module @b SHOULD call #tdm_capture_done_handler when capture operation is done.
1105 tdm_error (*capture_set_done_handler)(tdm_capture *capture,
1106 tdm_capture_done_handler func, void *user_data);
1108 void (*reserved1)(void);
1109 void (*reserved2)(void);
1110 void (*reserved3)(void);
1111 void (*reserved4)(void);
1112 void (*reserved5)(void);
1113 void (*reserved6)(void);
1114 void (*reserved7)(void);
1115 void (*reserved8)(void);
1119 * @brief The tdm event source
1121 typedef void tdm_event_loop_source;
1124 * @brief The fd source handler
1126 typedef tdm_error (*tdm_event_loop_fd_handler)(int fd, tdm_event_loop_mask mask, void *user_data);
1129 * @brief The timer source handler
1131 typedef tdm_error (*tdm_event_loop_timer_handler)(void *user_data);
1133 #define TDM_BACKEND_MINOR_VERSION_MASK 0x0000FFFF
1134 #define TDM_BACKEND_MAJOR_VERSION_MASK 0xFFFF0000
1135 #define TDM_BACKEND_GET_ABI_MINOR(v) ((v) & TDM_BACKEND_MINOR_VERSION_MASK)
1136 #define TDM_BACKEND_GET_ABI_MAJOR(v) (((v) & TDM_BACKEND_MAJOR_VERSION_MASK) >> 16)
1140 * The ABI version of TDM backend module. It has a major and minor revision.
1141 * Modules using lower minor revisions will work with TDM frontend of a higher
1142 * minor revision. There is no compatibility between different major revisions.
1143 * The minor revision mask is 0x0000FFFF and the major revision mask is 0xFFFF0000.
1146 * tdm_backend_module tdm_backend_module_data = {
1149 * TDM_BACKEND_SET_ABI_VERSION(1,1),
1155 #define TDM_BACKEND_SET_ABI_VERSION(major, minor) \
1156 (((major) << 16) & TDM_BACKEND_MAJOR_VERSION_MASK) | \
1157 ((minor) & TDM_BACKEND_MINOR_VERSION_MASK)
1161 * This MACRO is deprecated since 1.2.0. Use TDM_BACKEND_SET_ABI_VERSION instead of this.
1163 * Use #TDM_BACKEND_SET_ABI_VERSION macro instead of this macro.
1165 #define TDM_BACKEND_ABI_VERSION TDM_BACKEND_SET_ABI_VERSION(1, 1)
1168 * @brief The backend module information of the entry point to initialize a TDM
1171 * A backend module @b SHOULD define the global data symbol of which name is
1172 * @b "tdm_backend_module_data". TDM will read this symbol, @b "tdm_backend_module_data",
1173 * at the initial time and call init() function of #tdm_backend_module.
1175 typedef struct _tdm_backend_module {
1176 const char *name; /**< The module name of a backend module */
1177 const char *vendor; /**< The vendor name of a backend module */
1178 unsigned long abi_version; /**< The ABI version of a backend module */
1181 * @brief The init function of a backend module
1182 * @param[in] dpy A display object
1183 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
1184 * @return The backend module data
1185 * @see tdm_backend_data
1187 tdm_backend_data *(*init)(tdm_display *dpy, tdm_error *error);
1190 * @brief The deinit function of a backend module
1191 * @param[in] bdata The backend module data
1193 void (*deinit)(tdm_backend_data *bdata);
1194 } tdm_backend_module;
1197 * @brief Register the backend display functions to a display
1198 * @param[in] dpy A display object
1199 * @param[in] func_display display functions
1200 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1201 * @see tdm_backend_register_func_output, tdm_backend_register_func_layer
1203 * A backend module @b SHOULD set the backend display functions at least.
1206 tdm_backend_register_func_display(tdm_display *dpy,
1207 tdm_func_display *func_display);
1210 * @brief Register the backend output functions to a display
1211 * @param[in] dpy A display object
1212 * @param[in] func_output output functions
1213 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1214 * @see tdm_backend_register_func_display, tdm_backend_register_func_layer
1216 * A backend module @b SHOULD set the backend output functions at least.
1219 tdm_backend_register_func_output(tdm_display *dpy,
1220 tdm_func_output *func_output);
1223 * @brief Register the backend layer functions to a display
1224 * @param[in] dpy A display object
1225 * @param[in] func_layer layer functions
1226 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1227 * @see tdm_backend_register_func_display, tdm_backend_register_func_output
1229 * A backend module @b SHOULD set the backend layer functions at least.
1232 tdm_backend_register_func_layer(tdm_display *dpy, tdm_func_layer *func_layer);
1235 * @brief Register the backend hwc_window functions to a display
1236 * @param[in] dpy A display object
1237 * @param[in] func_hwc_window hwc_window functions
1238 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1239 * @see tdm_backend_register_func_display, tdm_backend_register_func_output
1241 * A backend module @b SHOULD set the backend hwc_window functions at least.
1245 tdm_backend_register_func_hwc_window(tdm_display *dpy, tdm_func_hwc_window *func_hwc_window);
1248 * @brief Register the backend pp functions to a display
1249 * @param[in] dpy A display object
1250 * @param[in] func_pp pp functions
1251 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1252 * @see tdm_backend_register_func_display, tdm_backend_register_func_capture
1254 * A backend module doesn'tcan skip to register the backend pp functions
1255 * if a hardware doesn't have the memory-to-memory converting device.
1258 tdm_backend_register_func_pp(tdm_display *dpy, tdm_func_pp *func_pp);
1261 * @brief Register the backend capture functions to a display
1262 * @param[in] dpy A display object
1263 * @param[in] func_capture capture functions
1264 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1265 * @see tdm_backend_register_func_display, tdm_backend_register_func_pp
1267 * A backend module can skip to register the backend capture functions
1268 * if a hardware doesn't have the capture device.
1271 tdm_backend_register_func_capture(tdm_display *dpy,
1272 tdm_func_capture *func_capture);
1275 * @brief Increase the ref_count of a TDM buffer
1277 * TDM has its own buffer release mechanism to let an frontend user know when a TDM buffer
1278 * becomes available for a next job. A TDM buffer can be used for TDM to show
1279 * it on screen or to capture an output and a layer. After all operations,
1280 * TDM will release it immediately when TDM doesn't need it any more.
1281 * @param[in] buffer A TDM buffer
1282 * @return A buffer itself. Otherwise, NULL.
1283 * @see tdm_buffer_unref_backend
1285 * - This function @b SHOULD be paired with #tdm_buffer_unref_backend. \n
1286 * - For example, this function @b SHOULD be called in case that a backend module uses the TDM
1287 * buffer of a layer for capturing a output or a layer to avoid tearing issue.
1290 tdm_buffer_ref_backend(tbm_surface_h buffer);
1293 * @brief Decrease the ref_count of a TDM buffer
1294 * @param[in] buffer A TDM buffer
1295 * @see tdm_buffer_ref_backend
1298 tdm_buffer_unref_backend(tbm_surface_h buffer);
1301 * @brief The destroy handler of a TDM buffer
1302 * @param[in] buffer A TDM buffer
1303 * @param[in] user_data user data
1304 * @see tdm_buffer_add_destroy_handler, tdm_buffer_remove_destroy_handler
1306 typedef void (*tdm_buffer_destroy_handler)(tbm_surface_h buffer,
1310 * @brief Add a destroy handler to a TDM buffer
1311 * @param[in] buffer A TDM buffer
1312 * @param[in] func A destroy handler
1313 * @param[in] user_data user data
1314 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1315 * @see tdm_buffer_remove_destroy_handler
1317 * A backend module can add a TDM buffer destroy handler to a TDM buffer which
1318 * is a #tbm_surface_h object. When the TDM buffer is destroyed, this handler will
1322 tdm_buffer_add_destroy_handler(tbm_surface_h buffer,
1323 tdm_buffer_destroy_handler func, void *user_data);
1326 * @brief Remove a destroy handler from a TDM buffer
1327 * @param[in] buffer A TDM buffer
1328 * @param[in] func A destroy handler
1329 * @param[in] user_data user data
1330 * @see tdm_buffer_add_destroy_handler
1333 tdm_buffer_remove_destroy_handler(tbm_surface_h buffer,
1334 tdm_buffer_destroy_handler func, void *user_data);
1337 * @brief Add a FD handler for activity on the given file descriptor
1338 * @param[in] dpy A display object
1339 * @param[in] fd A file descriptor
1340 * @param[in] mask to monitor FD
1341 * @param[in] func A FD handler function
1342 * @param[in] user_data user data
1343 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
1344 * @return A FD event source
1345 * @see #tdm_event_loop_source_fd_update, #tdm_event_loop_source_remove
1347 tdm_event_loop_source*
1348 tdm_event_loop_add_fd_handler(tdm_display *dpy, int fd, tdm_event_loop_mask mask,
1349 tdm_event_loop_fd_handler func, void *user_data,
1353 * @brief Update the mask of the given FD event source
1354 * @param[in] source The given FD event source
1355 * @param[in] mask to monitor FD
1356 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1359 tdm_event_loop_source_fd_update(tdm_event_loop_source *source, tdm_event_loop_mask mask);
1362 * @brief Add a timer handler
1363 * @param[in] dpy A display object
1364 * @param[in] func A timer handler function
1365 * @param[in] user_data user data
1366 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
1367 * @return A timer event source
1368 * @see #tdm_event_loop_source_timer_update, #tdm_event_loop_source_remove
1370 tdm_event_loop_source*
1371 tdm_event_loop_add_timer_handler(tdm_display *dpy, tdm_event_loop_timer_handler func,
1372 void *user_data, tdm_error *error);
1375 * @brief Update the millisecond delay time of the given timer event source.
1376 * @param[in] source The given timer event source
1377 * @param[in] ms_delay The millisecond delay time. zero "0" disarms the timer.
1378 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1381 tdm_event_loop_source_timer_update(tdm_event_loop_source *source, unsigned int ms_delay);
1384 * @brief Remove the given event source
1385 * @param[in] source The given event source
1386 * @see #tdm_event_loop_add_fd_handler, #tdm_event_loop_add_timer_handler
1389 tdm_event_loop_source_remove(tdm_event_loop_source *source);
1392 * @brief Trigger a 'need to validate' event.
1393 * @param[in] output The output the event should be triggered for.
1394 * @note The global display lock has to be locked before the call to this function.
1395 * @see #tdm_output_hwc_set_need_validate_handler
1399 tdm_backend_trigger_need_validate_event(tdm_output *output);
1405 #endif /* _TDM_BACKEND_H_ */