At present the display does not show on some machines, e.g. Ubunutu 20.04 but the reason is unknown. Add a work-around until this can be determined.
Also include more error checking just in case.
Signed-off-by: Simon Glass sjg@chromium.org ---
arch/sandbox/cpu/sdl.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/arch/sandbox/cpu/sdl.c b/arch/sandbox/cpu/sdl.c index 8102649be3a..e2649494818 100644 --- a/arch/sandbox/cpu/sdl.c +++ b/arch/sandbox/cpu/sdl.c @@ -164,8 +164,29 @@ int sandbox_sdl_init_display(int width, int height, int log2_bpp,
int sandbox_sdl_sync(void *lcd_base) { + struct SDL_Rect rect; + int ret; + + if (!sdl.texture) + return 0; + SDL_RenderClear(sdl.renderer); SDL_UpdateTexture(sdl.texture, NULL, lcd_base, sdl.pitch); - SDL_RenderCopy(sdl.renderer, sdl.texture, NULL, NULL); + ret = SDL_RenderCopy(sdl.renderer, sdl.texture, NULL, NULL); + if (ret) { + printf("SDL copy %d: %s\n", ret, SDL_GetError()); + return -EIO; + } + + /* + * On some machines this does not appear. Draw an empty rectangle which + * seems to fix that. + */ + rect.x = 0; + rect.y = 0; + rect.w = 0; + rect.h = 0; + SDL_RenderDrawRect(sdl.renderer, &rect); + SDL_RenderPresent(sdl.renderer); sandbox_sdl_poll_events();