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feat(hal): add render_start_cb to disp_drv (#3274)

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* feat(hal): add render_start_cb to disp_drv

* update doc for render_start_cb

* Update docs/porting/display.md

* remove disp_refr parameter

Co-authored-by: pengyiqiang <pengyiqiang@xiaomi.com>
Co-authored-by: Gabor Kiss-Vamosi <kisvegabor@gmail.com>
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_VIFEXTech 2022-04-19 16:05:59 +08:00 committed by GitHub
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1
docs/porting/display.md
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@ -109,6 +109,7 @@ It can be used if the display controller can refresh only areas with specific he
This way the buffers used in `lv_disp_draw_buf_t` can be smaller to hold only the required number of bits for the given area size. Note that rendering with `set_px_cb` is slower than normal rendering. This way the buffers used in `lv_disp_draw_buf_t` can be smaller to hold only the required number of bits for the given area size. Note that rendering with `set_px_cb` is slower than normal rendering.
- `monitor_cb` A callback function that tells how many pixels were refreshed and in how much time. Called when the last chunk is rendered and sent to the display. - `monitor_cb` A callback function that tells how many pixels were refreshed and in how much time. Called when the last chunk is rendered and sent to the display.
- `clean_dcache_cb` A callback for cleaning any caches related to the display. - `clean_dcache_cb` A callback for cleaning any caches related to the display.
- `render_start_cb` A callback function that notifies the display driver that rendering has started. It also could be used to wait for VSYNC to start rendering. It's useful if rendering is faster than a VSYNC period.
LVGL has built-in support to several GPUs (see `lv_conf.h`) but if something else is required these functions can be used to make LVGL use a GPU: LVGL has built-in support to several GPUs (see `lv_conf.h`) but if something else is required these functions can be used to make LVGL use a GPU:
- `gpu_fill_cb` fill an area in the memory with a color. - `gpu_fill_cb` fill an area in the memory with a color.

5
src/core/lv_refr.c
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@ -519,6 +519,11 @@ static void lv_refr_areas(void)
} }
} }
/*Notify the display driven rendering has started*/
if(disp_refr->driver->render_start_cb) {
disp_refr->driver->render_start_cb(disp_refr->driver);
}
disp_refr->driver->draw_buf->last_area = 0; disp_refr->driver->draw_buf->last_area = 0;
disp_refr->driver->draw_buf->last_part = 0; disp_refr->driver->draw_buf->last_part = 0;
disp_refr->rendering_in_progress = true; disp_refr->rendering_in_progress = true;

3
src/hal/lv_hal_disp.h
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@ -133,6 +133,9 @@ typedef struct _lv_disp_drv_t {
/** OPTIONAL: called when driver parameters are updated */ /** OPTIONAL: called when driver parameters are updated */
void (*drv_update_cb)(struct _lv_disp_drv_t * disp_drv); void (*drv_update_cb)(struct _lv_disp_drv_t * disp_drv);
/** OPTIONAL: called when start rendering */
void (*render_start_cb)(struct _lv_disp_drv_t * disp_drv);
/** On CHROMA_KEYED images this color will be transparent. /** On CHROMA_KEYED images this color will be transparent.
* `LV_COLOR_CHROMA_KEY` by default. (lv_conf.h)*/ * `LV_COLOR_CHROMA_KEY` by default. (lv_conf.h)*/
lv_color_t color_chroma_key; lv_color_t color_chroma_key;