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 Validate the output
599 * @details Instructs the device to inspect all of the layer state and
600 * determine if there are any composition type changes necessary before
601 * presenting the output. Permitted changes are described in the definition
602 * of tdm_composition_t above.
603 * @param[in] output A output object
604 * @param[out] num_types The number of composition type changes required by
605 * the device; if greater than 0, the client must either set and validate new
606 * types, or call output_hwc_accept_changes() to accept the changes returned by
607 * output_hwc_get_changed_composition_types(); must be the same as the number of
608 * changes returned by output_hwc_get_changed_composition_types (see the
609 * declaration of that function for more information); pointer will be non-NULL
610 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
613 tdm_error (*output_hwc_validate)(tdm_output *output, tdm_hwc_window **composited_wnds, uint32_t num_wnds,
614 uint32_t *num_types);
617 * @brief Get changed composition types
618 * @details Retrieves the windows for which the device requires a different
619 * composition type than had been set prior to the last call to output_hwc_validate().
620 * The client will either update its state with these types and call
621 * output_hwc_accept_changes, or will set new types and attempt to validate the
623 * layers and types may be NULL to retrieve the number of elements which
624 * will be returned. The number of elements returned must be the same as the
625 * value returned in num_types from the last call to output_hwc_validate().
626 * @param[in] output A output object
627 * @param[out] num_elements If windows or types were NULL, the number of layers
628 * and types which would have been returned; if both were non-NULL, the
629 * number of elements returned in layers and types, which must not exceed
630 * the value stored in num_elements prior to the call; pointer will be
632 * @param[out] windows An array of windows
633 * @param[out] composition_types An array of composition types, each
634 * corresponding to an element of windows
635 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
638 tdm_error (*output_hwc_get_changed_composition_types)(tdm_output *output,
639 uint32_t *num_elements,
640 tdm_hwc_window **hwc_window,
641 tdm_hwc_window_composition *composition_types);
643 * @brief Accepts the changes required by the device
644 * @details Accepts the changes required by the device from the previous
645 * output_hwc_validate() call (which may be queried using
646 * output_get_chaged_composition_types()) and revalidates the display. This
647 * function is equivalent to requesting the changed types from
648 * output_get_chaged_composition_types(), setting those types on the
649 * corresponding windows, and then calling output_hwc_validate again.
650 * After this call it must be valid to present this display. Calling this after
651 * output_hwc_validate() returns 0 changes must succeed with TDM_ERROR_NONE, but
652 * should have no other effect.
653 * @param[in] output A output object
654 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
657 tdm_error (*output_hwc_accept_changes)(tdm_output *output);
660 * @brief Get a target buffer queue
661 * @param[in] output A output object
662 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
663 * @return A buffer queue
666 tbm_surface_queue_h (*output_hwc_get_target_buffer_queue)(tdm_output *output,
670 * @brief Get the supported format array for video hwc windows of a output object.
671 * @param[in] output A output object
672 * @param[out] formats The available format array
673 * @param[out] count The count of formats
674 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
676 tdm_error (*output_hwc_get_video_supported_formats)(tdm_layer *layer,
677 const tbm_format **formats, int *count);
680 * @brief Creates a new video window on the given output.
681 * @param[in] output A output object
682 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
683 * @return A created window object. If the video abilities isn't accessed return NULL
686 tdm_hwc_window *(*output_hwc_create_video_window)(tdm_output *output, tdm_error *error);
688 void (*reserved5)(void);
689 void (*reserved6)(void);
690 void (*reserved7)(void);
691 void (*reserved8)(void);
695 * @brief The layer functions for a backend module.
697 typedef struct _tdm_func_layer {
699 * @brief Get the capabilities of a layer object
700 * @param[in] layer A layer object
701 * @param[out] caps The capabilities of a layer object
702 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
704 * A backend module @b SHOULD implement this function. TDM calls this function
705 * not only at the initial time, but also at the update time when new output
707 * #tdm_caps_layer contains avaiable formats/properties, zpos information, etc.
709 tdm_error (*layer_get_capability)(tdm_layer *layer, tdm_caps_layer *caps);
712 * @brief Set the property which has a given id.
713 * @param[in] layer A layer object
714 * @param[in] id The property id
715 * @param[in] value The value
716 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
718 tdm_error (*layer_set_property)(tdm_layer *layer, unsigned int id,
722 * @brief Get the property which has a given id.
723 * @param[in] layer A layer object
724 * @param[in] id The property id
725 * @param[out] value The value
726 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
728 tdm_error (*layer_get_property)(tdm_layer *layer, unsigned int id,
732 * @brief Set the geometry information to a layer object
733 * @param[in] layer A layer object
734 * @param[in] info The geometry information
735 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
736 * @see output_commit() function of #tdm_func_output
738 * A backend module would apply the geometry information when the output object
739 * of a layer object is committed.
741 tdm_error (*layer_set_info)(tdm_layer *layer, tdm_info_layer *info);
744 * @brief Get the geometry information to a layer object
745 * @param[in] layer A layer object
746 * @param[out] info The geometry information
747 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
749 tdm_error (*layer_get_info)(tdm_layer *layer, tdm_info_layer *info);
752 * @brief Set a TDM buffer to a layer object
753 * @param[in] layer A layer object
754 * @param[in] buffer A TDM buffer
755 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
756 * @see output_commit() function of #tdm_func_output
758 * A backend module would show a TDM buffer on screen when the output object
759 * of a layer object is committed.
761 tdm_error (*layer_set_buffer)(tdm_layer *layer, tbm_surface_h buffer);
764 * @brief Unset a TDM buffer from a layer object
765 * @param[in] layer A layer object
766 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
768 * A backend module @b SHOULD remove the current showing buffer from screen.
770 tdm_error (*layer_unset_buffer)(tdm_layer *layer);
773 * @brief Set the zpos for a VIDEO layer object
774 * @param[in] layer A layer object
775 * @param[in] zpos z-order
776 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
777 * @see tdm_caps_layer, tdm_layer_capability
779 * A backend module doesn't need to implement this function if a backend
780 * module doesn't have VIDEO layers.\n
781 * This function is for VIDEO layers.
782 * GRAPHIC layers are non-changeable. The zpos of GRAPHIC layers starts
783 * from 0. If there are 4 GRAPHIC layers, The zpos SHOULD be 0, 1, 2, 3.\n
784 * But the zpos of VIDEO layer is changeable. And The zpos of VIDEO layers
785 * is less than GRAPHIC layers or more than GRAPHIC layers.
786 * ie, ..., -2, -1, 4, 5, ... (if 0 <= GRAPHIC layer's zpos < 4).
787 * The zpos of VIDEO layers is @b relative. It doesn't need to start
788 * from -1 or 4. Let's suppose that there are two VIDEO layers.
789 * One has -2 zpos. Another has -4 zpos. Then -2 Video layer is higher
790 * than -4 VIDEO layer.
792 tdm_error (*layer_set_video_pos)(tdm_layer *layer, int zpos);
795 * @brief Create a capture object of a layer object
796 * @param[in] output A output object
797 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
798 * @return A capture object
799 * @see capture_destroy() function of #tdm_func_capture
801 * A backend module doesn't need to implement this function if a hardware
802 * doesn't have the capture device.
804 tdm_capture *(*layer_create_capture)(tdm_layer *layer, tdm_error *error);
807 * @brief Get buffer flags which the layer can support.
808 * @param[in] layer A layer object
809 * @param[out] flags The buffer flags which should be the tbm_bo flags
810 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
812 tdm_error (*layer_get_buffer_flags)(tdm_layer *layer, unsigned int *flags);
814 void (*reserved1)(void);
815 void (*reserved2)(void);
816 void (*reserved3)(void);
817 void (*reserved4)(void);
818 void (*reserved5)(void);
819 void (*reserved6)(void);
820 void (*reserved7)(void);
824 * @brief The window functions for a backend module.
827 typedef struct _tdm_func_window {
829 * @brief Get a buffer queue for the window object
830 * @param[in] hwc_window A window object
831 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
832 * @return A buffer queue
834 tbm_surface_queue_h (*hwc_window_get_tbm_buffer_queue)(tdm_hwc_window *hwc_window,
838 * @brief Sets the desired composition type of the given window.
839 * @details During output_hwc_validate(), the device may request changes to
840 * the composition types of any of the layers as described in the definition
841 * of tdm_hwc_window_composition_t above.
842 * @param[in] hwc_window A window object
843 * @param[in] composition_type The new composition type
844 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
846 tdm_error (*hwc_window_set_composition_type)(tdm_hwc_window *hwc_window,
847 tdm_hwc_window_composition composition_type);
850 * @brief Set the buffer damage
851 * @details Provides the region of the source buffer which has been modified
852 * since the last frame. This region does not need to be validated before
853 * calling output_commit().
854 * Once set through this function, the damage region remains the same until a
855 * subsequent call to this function.
856 * If damage.num_rects > 0, then it may be assumed that any portion of the source
857 * buffer not covered by one of the rects has not been modified this frame. If
858 * damage.num_rects == 0, then the whole source buffer must be treated as if it
860 * If the layer's contents are not modified relative to the prior frame, damage
861 * will contain exactly one empty rect([0, 0, 0, 0]).
862 * The damage rects are relative to the pre-transformed buffer, and their origin
863 * is the top-left corner. They will not exceed the dimensions of the latched
865 * @param[in] hwc_window A window object
866 * @param[in] damage The new buffer damage region
867 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
869 tdm_error (*hwc_window_set_buffer_damage)(tdm_hwc_window *hwc_window,
870 tdm_hwc_region damage);
873 * @brief Set the information to a window object
874 * @details The information will be applied when the output object
875 * of a layer object is committed.
876 * @param[in] hwc_window A window object
877 * @param[in] info The geometry information
878 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
880 tdm_error (*hwc_window_set_info)(tdm_hwc_window *hwc_window,
881 tdm_hwc_window_info *info);
884 * @brief Set a TDM buffer to a window object
885 * @details A TDM buffer will be applied when the output object
886 * of a layer object is committed.
887 * @param[in] hwc_window A window object
888 * @param[in] buffer A TDM buffer
889 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
891 * Implementation should return #TDM_ERROR_BUSY if #hwc_window can't
892 * be updated right now, this won't be interpreted like some critical
895 tdm_error (*hwc_window_set_buffer)(tdm_hwc_window *hwc_window,
896 tbm_surface_h buffer);
899 * @brief Unset a TDM buffer to a window object
900 * @details A TDM buffer will be applied when the output object
901 * of a layer object is committed.
902 * @param[in] hwc_window A window object
903 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
905 * Implementation should return #TDM_ERROR_BUSY if #hwc_window can't
906 * be updated right now, this won't be interpreted like some critical
909 tdm_error (*hwc_window_unset_buffer)(tdm_hwc_window *hwc_window);
912 * @brief Set a flags to a window object
913 * @param[in] hwc_window A window object
914 * @param[in] flags A hwc_window flags
915 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
917 tdm_error (*hwc_window_set_flags)(tdm_hwc_window *hwc_window,
918 tdm_hwc_window_flag flags);
921 * @brief Unset a flags from 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_unset_flags)(tdm_hwc_window *hwc_window,
927 tdm_hwc_window_flag flags);
930 * @brief Get the window video capability
931 * @param[in] hwc_window A window object
932 * @param[out] video_capability A hwc window video capability
933 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
935 tdm_error (*hwc_window_video_get_capability)(tdm_hwc_window *hwc_window,
936 tdm_hwc_window_video_capability *video_capability);
939 * @brief Get the available property array of a video hwc window object.
940 * @param[in] hwc window A video hwc window object
941 * @param[out] props The available property array
942 * @param[out] count The count of properties
943 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
945 tdm_error (*hwc_window_video_get_available_properties)(
946 tdm_hwc_window *hwc_window,
947 const tdm_prop **props, int *count);
950 * @brief Get the property which has a given id.
951 * @param[in] hwc window A video hwc window object
952 * @param[in] id The property id
953 * @param[out] value The value
954 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
956 tdm_error (*hwc_window_video_get_property)(tdm_hwc_window *hwc_window,
957 uint32_t id, tdm_value *value);
960 * @brief Set the property which has a given id.
961 * @param[in] hwc window A video hwc window object
962 * @param[in] id The property id
963 * @param[in] value The value
964 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
966 tdm_error (*hwc_window_video_set_property)(tdm_hwc_window *hwc_window,
967 uint32_t id, tdm_value value);
969 } tdm_func_hwc_window;
972 * @brief The pp functions for a backend module.
974 typedef struct _tdm_func_pp {
976 * @brief Destroy a pp object
977 * @param[in] pp A pp object
978 * @see display_create_pp() function of #tdm_func_display
980 void (*pp_destroy)(tdm_pp *pp);
983 * @brief Set the geometry information to a pp object
984 * @param[in] pp A pp object
985 * @param[in] info The geometry information
986 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
987 * @see pp_commit() function of #tdm_func_pp
989 * A backend module would apply the geometry information when committed.
991 tdm_error (*pp_set_info)(tdm_pp *pp, tdm_info_pp *info);
994 * @brief Attach a source buffer and a destination buffer to a pp object
995 * @param[in] pp A pp object
996 * @param[in] src A source buffer
997 * @param[in] dst A destination buffer
998 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
999 * @see pp_set_info() function of #tdm_func_pp
1000 * @see pp_commit() function of #tdm_func_pp
1001 * @see pp_set_done_handler, tdm_pp_done_handler
1003 * A backend module converts the image of a source buffer to a destination
1004 * buffer when committed. The size/crop/transform information is set via
1005 * #pp_set_info() of #tdm_func_pp. When done, a backend module @b SHOULD
1006 * return the source/destination buffer via tdm_pp_done_handler.
1008 tdm_error (*pp_attach)(tdm_pp *pp, tbm_surface_h src, tbm_surface_h dst);
1011 * @brief Commit changes for a pp object
1012 * @param[in] pp A pp object
1013 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1015 tdm_error (*pp_commit)(tdm_pp *pp);
1018 * @brief Set a user done handler to a pp object
1019 * @param[in] pp A pp object
1020 * @param[in] func A user done handler
1021 * @param[in] user_data user data
1022 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1024 * A backend module @b SHOULD call #tdm_pp_done_handler when converintg a image is done.
1026 tdm_error (*pp_set_done_handler)(tdm_pp *pp, tdm_pp_done_handler func,
1029 void (*reserved1)(void);
1030 void (*reserved2)(void);
1031 void (*reserved3)(void);
1032 void (*reserved4)(void);
1033 void (*reserved5)(void);
1034 void (*reserved6)(void);
1035 void (*reserved7)(void);
1036 void (*reserved8)(void);
1040 * @brief The capture functions for a backend module.
1042 typedef struct _tdm_func_capture {
1044 * @brief Destroy a capture object
1045 * @param[in] capture A capture object
1046 * @see output_create_capture() function of #tdm_func_output
1047 * @see layer_create_capture() function of #tdm_func_layer
1049 void (*capture_destroy)(tdm_capture *capture);
1052 * @brief Set the geometry information to a capture object
1053 * @param[in] capture A capture object
1054 * @param[in] info The geometry information
1055 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1056 * @see capture_commit() function of #tdm_func_capture
1058 * A backend module would apply the geometry information when committed.
1060 tdm_error (*capture_set_info)(tdm_capture *capture, tdm_info_capture *info);
1063 * @brief Attach a TDM buffer to a capture object
1064 * @details When capture_commit() function is called, a backend module starts
1065 * to dump a output or a layer to a TDM buffer.
1066 * @param[in] capture A capture object
1067 * @param[in] buffer A TDM buffer
1068 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1069 * @see capture_set_info() function of #tdm_func_capture
1070 * @see capture_commit() function of #tdm_func_capture
1071 * @see capture_set_done_handler, tdm_capture_done_handler
1073 * A backend module starts to dump a output or a layer to to a TDM buffer when
1074 * committed. The size/crop/transform information is set via #capture_set_info()
1075 * of #tdm_func_capture. When done, a backend module @b SHOULD return the TDM
1076 * buffer via tdm_capture_done_handler.
1078 tdm_error (*capture_attach)(tdm_capture *capture, tbm_surface_h buffer);
1081 * @brief Commit changes for a capture object
1082 * @param[in] capture A capture object
1083 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1085 tdm_error (*capture_commit)(tdm_capture *capture);
1088 * @brief Set a user done handler to a capture object
1089 * @param[in] capture A capture object
1090 * @param[in] func A user done handler
1091 * @param[in] user_data user data
1092 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1094 * A backend module @b SHOULD call #tdm_capture_done_handler when capture operation is done.
1096 tdm_error (*capture_set_done_handler)(tdm_capture *capture,
1097 tdm_capture_done_handler func, void *user_data);
1099 void (*reserved1)(void);
1100 void (*reserved2)(void);
1101 void (*reserved3)(void);
1102 void (*reserved4)(void);
1103 void (*reserved5)(void);
1104 void (*reserved6)(void);
1105 void (*reserved7)(void);
1106 void (*reserved8)(void);
1110 * @brief The tdm event source
1112 typedef void tdm_event_loop_source;
1115 * @brief The fd source handler
1117 typedef tdm_error (*tdm_event_loop_fd_handler)(int fd, tdm_event_loop_mask mask, void *user_data);
1120 * @brief The timer source handler
1122 typedef tdm_error (*tdm_event_loop_timer_handler)(void *user_data);
1124 #define TDM_BACKEND_MINOR_VERSION_MASK 0x0000FFFF
1125 #define TDM_BACKEND_MAJOR_VERSION_MASK 0xFFFF0000
1126 #define TDM_BACKEND_GET_ABI_MINOR(v) ((v) & TDM_BACKEND_MINOR_VERSION_MASK)
1127 #define TDM_BACKEND_GET_ABI_MAJOR(v) (((v) & TDM_BACKEND_MAJOR_VERSION_MASK) >> 16)
1131 * The ABI version of TDM backend module. It has a major and minor revision.
1132 * Modules using lower minor revisions will work with TDM frontend of a higher
1133 * minor revision. There is no compatibility between different major revisions.
1134 * The minor revision mask is 0x0000FFFF and the major revision mask is 0xFFFF0000.
1137 * tdm_backend_module tdm_backend_module_data = {
1140 * TDM_BACKEND_SET_ABI_VERSION(1,1),
1146 #define TDM_BACKEND_SET_ABI_VERSION(major, minor) \
1147 (((major) << 16) & TDM_BACKEND_MAJOR_VERSION_MASK) | \
1148 ((minor) & TDM_BACKEND_MINOR_VERSION_MASK)
1152 * This MACRO is deprecated since 1.2.0. Use TDM_BACKEND_SET_ABI_VERSION instead of this.
1154 * Use #TDM_BACKEND_SET_ABI_VERSION macro instead of this macro.
1156 #define TDM_BACKEND_ABI_VERSION TDM_BACKEND_SET_ABI_VERSION(1, 1)
1159 * @brief The backend module information of the entry point to initialize a TDM
1162 * A backend module @b SHOULD define the global data symbol of which name is
1163 * @b "tdm_backend_module_data". TDM will read this symbol, @b "tdm_backend_module_data",
1164 * at the initial time and call init() function of #tdm_backend_module.
1166 typedef struct _tdm_backend_module {
1167 const char *name; /**< The module name of a backend module */
1168 const char *vendor; /**< The vendor name of a backend module */
1169 unsigned long abi_version; /**< The ABI version of a backend module */
1172 * @brief The init function of a backend module
1173 * @param[in] dpy A display object
1174 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
1175 * @return The backend module data
1176 * @see tdm_backend_data
1178 tdm_backend_data *(*init)(tdm_display *dpy, tdm_error *error);
1181 * @brief The deinit function of a backend module
1182 * @param[in] bdata The backend module data
1184 void (*deinit)(tdm_backend_data *bdata);
1185 } tdm_backend_module;
1188 * @brief Register the backend display functions to a display
1189 * @param[in] dpy A display object
1190 * @param[in] func_display display functions
1191 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1192 * @see tdm_backend_register_func_output, tdm_backend_register_func_layer
1194 * A backend module @b SHOULD set the backend display functions at least.
1197 tdm_backend_register_func_display(tdm_display *dpy,
1198 tdm_func_display *func_display);
1201 * @brief Register the backend output functions to a display
1202 * @param[in] dpy A display object
1203 * @param[in] func_output output functions
1204 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1205 * @see tdm_backend_register_func_display, tdm_backend_register_func_layer
1207 * A backend module @b SHOULD set the backend output functions at least.
1210 tdm_backend_register_func_output(tdm_display *dpy,
1211 tdm_func_output *func_output);
1214 * @brief Register the backend layer functions to a display
1215 * @param[in] dpy A display object
1216 * @param[in] func_layer layer functions
1217 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1218 * @see tdm_backend_register_func_display, tdm_backend_register_func_output
1220 * A backend module @b SHOULD set the backend layer functions at least.
1223 tdm_backend_register_func_layer(tdm_display *dpy, tdm_func_layer *func_layer);
1226 * @brief Register the backend hwc_window functions to a display
1227 * @param[in] dpy A display object
1228 * @param[in] func_hwc_window hwc_window functions
1229 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1230 * @see tdm_backend_register_func_display, tdm_backend_register_func_output
1232 * A backend module @b SHOULD set the backend hwc_window functions at least.
1236 tdm_backend_register_func_hwc_window(tdm_display *dpy, tdm_func_hwc_window *func_hwc_window);
1239 * @brief Register the backend pp functions to a display
1240 * @param[in] dpy A display object
1241 * @param[in] func_pp pp functions
1242 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1243 * @see tdm_backend_register_func_display, tdm_backend_register_func_capture
1245 * A backend module doesn'tcan skip to register the backend pp functions
1246 * if a hardware doesn't have the memory-to-memory converting device.
1249 tdm_backend_register_func_pp(tdm_display *dpy, tdm_func_pp *func_pp);
1252 * @brief Register the backend capture functions to a display
1253 * @param[in] dpy A display object
1254 * @param[in] func_capture capture functions
1255 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1256 * @see tdm_backend_register_func_display, tdm_backend_register_func_pp
1258 * A backend module can skip to register the backend capture functions
1259 * if a hardware doesn't have the capture device.
1262 tdm_backend_register_func_capture(tdm_display *dpy,
1263 tdm_func_capture *func_capture);
1266 * @brief Increase the ref_count of a TDM buffer
1268 * TDM has its own buffer release mechanism to let an frontend user know when a TDM buffer
1269 * becomes available for a next job. A TDM buffer can be used for TDM to show
1270 * it on screen or to capture an output and a layer. After all operations,
1271 * TDM will release it immediately when TDM doesn't need it any more.
1272 * @param[in] buffer A TDM buffer
1273 * @return A buffer itself. Otherwise, NULL.
1274 * @see tdm_buffer_unref_backend
1276 * - This function @b SHOULD be paired with #tdm_buffer_unref_backend. \n
1277 * - For example, this function @b SHOULD be called in case that a backend module uses the TDM
1278 * buffer of a layer for capturing a output or a layer to avoid tearing issue.
1281 tdm_buffer_ref_backend(tbm_surface_h buffer);
1284 * @brief Decrease the ref_count of a TDM buffer
1285 * @param[in] buffer A TDM buffer
1286 * @see tdm_buffer_ref_backend
1289 tdm_buffer_unref_backend(tbm_surface_h buffer);
1292 * @brief The destroy handler of a TDM buffer
1293 * @param[in] buffer A TDM buffer
1294 * @param[in] user_data user data
1295 * @see tdm_buffer_add_destroy_handler, tdm_buffer_remove_destroy_handler
1297 typedef void (*tdm_buffer_destroy_handler)(tbm_surface_h buffer,
1301 * @brief Add a destroy handler to a TDM buffer
1302 * @param[in] buffer A TDM buffer
1303 * @param[in] func A destroy handler
1304 * @param[in] user_data user data
1305 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1306 * @see tdm_buffer_remove_destroy_handler
1308 * A backend module can add a TDM buffer destroy handler to a TDM buffer which
1309 * is a #tbm_surface_h object. When the TDM buffer is destroyed, this handler will
1313 tdm_buffer_add_destroy_handler(tbm_surface_h buffer,
1314 tdm_buffer_destroy_handler func, void *user_data);
1317 * @brief Remove a destroy handler from a TDM buffer
1318 * @param[in] buffer A TDM buffer
1319 * @param[in] func A destroy handler
1320 * @param[in] user_data user data
1321 * @see tdm_buffer_add_destroy_handler
1324 tdm_buffer_remove_destroy_handler(tbm_surface_h buffer,
1325 tdm_buffer_destroy_handler func, void *user_data);
1328 * @brief Add a FD handler for activity on the given file descriptor
1329 * @param[in] dpy A display object
1330 * @param[in] fd A file descriptor
1331 * @param[in] mask to monitor FD
1332 * @param[in] func A FD handler function
1333 * @param[in] user_data user data
1334 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
1335 * @return A FD event source
1336 * @see #tdm_event_loop_source_fd_update, #tdm_event_loop_source_remove
1338 tdm_event_loop_source*
1339 tdm_event_loop_add_fd_handler(tdm_display *dpy, int fd, tdm_event_loop_mask mask,
1340 tdm_event_loop_fd_handler func, void *user_data,
1344 * @brief Update the mask of the given FD event source
1345 * @param[in] source The given FD event source
1346 * @param[in] mask to monitor FD
1347 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1350 tdm_event_loop_source_fd_update(tdm_event_loop_source *source, tdm_event_loop_mask mask);
1353 * @brief Add a timer handler
1354 * @param[in] dpy A display object
1355 * @param[in] func A timer handler function
1356 * @param[in] user_data user data
1357 * @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
1358 * @return A timer event source
1359 * @see #tdm_event_loop_source_timer_update, #tdm_event_loop_source_remove
1361 tdm_event_loop_source*
1362 tdm_event_loop_add_timer_handler(tdm_display *dpy, tdm_event_loop_timer_handler func,
1363 void *user_data, tdm_error *error);
1366 * @brief Update the millisecond delay time of the given timer event source.
1367 * @param[in] source The given timer event source
1368 * @param[in] ms_delay The millisecond delay time. zero "0" disarms the timer.
1369 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
1372 tdm_event_loop_source_timer_update(tdm_event_loop_source *source, unsigned int ms_delay);
1375 * @brief Remove the given event source
1376 * @param[in] source The given event source
1377 * @see #tdm_event_loop_add_fd_handler, #tdm_event_loop_add_timer_handler
1380 tdm_event_loop_source_remove(tdm_event_loop_source *source);
1383 * @brief Trigger a 'need to validate' event.
1384 * @param[in] output The output the event should be triggered for.
1385 * @note The global display lock has to be locked before the call to this function.
1386 * @see #tdm_output_hwc_set_need_validate_handler
1390 tdm_backend_trigger_need_validate_event(tdm_output *output);
1396 #endif /* _TDM_BACKEND_H_ */