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drivers: display: display_sdl: implement display_show

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Adds frame synchronization to every frame.
This prevents frame tearing.

Signed-off-by: Martin Stumpf <finomnis@gmail.com>
This commit is contained in:
Martin Stumpf 2024-11-10 15:25:54 +01:00 committed by Anas Nashif
parent 2e0687cfd2
commit abc296ff65
4 changed files with 17 additions and 16 deletions
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2
doc/releases/release-notes-4.1.rst
View file

@ -95,6 +95,8 @@ Drivers and Sensors
* Added flag ``frame_incomplete`` to ``display_write`` that indicates whether a write is the last
write of the frame, allowing display drivers to implement double buffering / tearing enable
signal handling (:github:`81250`)
* Added ``frame_incomplete`` handling to SDL display driver (:dtcompatible:`zephyr,sdl-dc`)
(:github:`81250`)
* Ethernet

6
drivers/display/display_sdl.c
View file

@ -260,9 +260,9 @@ static int sdl_display_write(const struct device *dev, const uint16_t x,
sdl_display_write_bgr565(disp_data->buf, desc, buf);
}
sdl_display_write_bottom(desc->height, desc->width, x, y,
disp_data->renderer, disp_data->mutex, disp_data->texture,
disp_data->buf, disp_data->display_on);
sdl_display_write_bottom(desc->height, desc->width, x, y, disp_data->renderer,
disp_data->mutex, disp_data->texture, disp_data->buf,
disp_data->display_on, desc->frame_incomplete);
return 0;
}

11
drivers/display/display_sdl_bottom.c
View file

@ -5,6 +5,8 @@
* SPDX-License-Identifier: Apache-2.0
*/
#include "display_sdl_bottom.h"
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
@ -64,10 +66,9 @@ int sdl_display_init_bottom(uint16_t height, uint16_t width, uint16_t zoom_pct,
return 0;
}
void sdl_display_write_bottom(const uint16_t height, const uint16_t width,
const uint16_t x, const uint16_t y,
void *renderer, void *mutex, void *texture,
uint8_t *buf, bool display_on)
void sdl_display_write_bottom(const uint16_t height, const uint16_t width, const uint16_t x,
const uint16_t y, void *renderer, void *mutex, void *texture,
uint8_t *buf, bool display_on, bool frame_incomplete)
{
SDL_Rect rect;
int err;
@ -85,7 +86,7 @@ void sdl_display_write_bottom(const uint16_t height, const uint16_t width,
SDL_UpdateTexture(texture, &rect, buf, 4 * rect.w);
if (display_on) {
if (display_on && !frame_incomplete) {
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, texture, NULL, NULL);
SDL_RenderPresent(renderer);

14
drivers/display/display_sdl_bottom.h
View file

@ -23,14 +23,12 @@ extern "C" {
int sdl_display_init_bottom(uint16_t height, uint16_t width, uint16_t zoom_pct,
bool use_accelerator, void **window, void **renderer, void **mutex,
void **texture, void **read_texture);
void sdl_display_write_bottom(const uint16_t height, const uint16_t width,
const uint16_t x, const uint16_t y,
void *renderer, void *mutex, void *texture,
uint8_t *buf, bool display_on);
int sdl_display_read_bottom(const uint16_t height, const uint16_t width,
const uint16_t x, const uint16_t y,
void *renderer, void *buf, uint16_t pitch,
void *mutex, void *texture, void **read_texture);
void sdl_display_write_bottom(const uint16_t height, const uint16_t width, const uint16_t x,
const uint16_t y, void *renderer, void *mutex, void *texture,
uint8_t *buf, bool display_on, bool frame_incomplete);
int sdl_display_read_bottom(const uint16_t height, const uint16_t width, const uint16_t x,
const uint16_t y, void *renderer, void *buf, uint16_t pitch,
void *mutex, void *texture, void *read_texture);
void sdl_display_blanking_off_bottom(void *renderer, void *texture);
void sdl_display_blanking_on_bottom(void *renderer);
void sdl_display_cleanup_bottom(void **window, void **renderer, void **mutex, void **texture,