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[KMS/DRM] Fix for bug #5518: only do async pageflips when hardware supports them.

This commit is contained in:
Manuel Alfayate Corchete 2021-01-31 03:48:29 +01:00
parent 79cd8cab08
commit bfa51c3845
3 changed files with 12 additions and 3 deletions
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2
src/video/kmsdrm/SDL_kmsdrmopengles.c
View File

@ -168,7 +168,7 @@ KMSDRM_GLES_SwapWindow(_THIS, SDL_Window * window) {
to do so, so even if we don't block on EGL, the flip will have completed
when we get here again. */
if (_this->egl_data->egl_swapinterval == 0) {
if (_this->egl_data->egl_swapinterval == 0 && viddata->async_pageflip_support) {
flip_flags |= DRM_MODE_PAGE_FLIP_ASYNC;
}

8
src/video/kmsdrm/SDL_kmsdrmvideo.c
View File

@ -653,6 +653,7 @@ int KMSDRM_InitDisplays (_THIS) {
SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
drmModeRes *resources = NULL;
uint64_t async_pageflip = 0;
int ret = 0;
int i;
@ -705,6 +706,13 @@ int KMSDRM_InitDisplays (_THIS) {
goto cleanup;
}
/* Determine if video hardware supports async pageflips. */
ret = KMSDRM_drmGetCap(viddata->drm_fd, DRM_CAP_ASYNC_PAGE_FLIP, &async_pageflip);
if (ret) {
SDL_LogError(SDL_LOG_CATEGORY_VIDEO, "Could not determine async page flip capability.");
}
viddata->async_pageflip_support = async_pageflip ? SDL_TRUE : SDL_FALSE;
/***********************************/
/* Block for Vulkan compatibility. */
/***********************************/

5
src/video/kmsdrm/SDL_kmsdrmvideo.h
View File

@ -41,8 +41,9 @@ typedef struct SDL_VideoData
struct gbm_device *gbm_dev;
SDL_bool video_init; /* Has VideoInit succeeded? */
SDL_bool vulkan_mode; /* Are we in Vulkan mode? One VK window is enough to be. */
SDL_bool video_init; /* Has VideoInit succeeded? */
SDL_bool vulkan_mode; /* Are we in Vulkan mode? One VK window is enough to be. */
SDL_bool async_pageflip_support; /* Does the hardware support async. pageflips? */
SDL_Window **windows;
int max_windows;