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[KMS/DRM] Rework some functions.

This commit is contained in:
Manuel Alfayate Corchete 2020-12-29 14:24:38 +01:00
parent 67f0b9b86d
commit 427c96ec11
4 changed files with 83 additions and 40 deletions
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6
src/video/kmsdrm/SDL_kmsdrmmouse.c
View File

@ -252,7 +252,7 @@ KMSDRM_ShowCursor(SDL_Cursor * cursor)
info.plane = dispdata->cursor_plane;
/* The rest of the members are zeroed. */
drm_atomic_set_plane_props(&info);
if (drm_atomic_commit(display->device, SDL_TRUE))
if (drm_atomic_commit(display->device, SDL_TRUE, SDL_FALSE))
return SDL_SetError("Failed atomic commit in KMSDRM_ShowCursor.");
}
return 0;
@ -324,7 +324,7 @@ KMSDRM_ShowCursor(SDL_Cursor * cursor)
drm_atomic_set_plane_props(&info);
if (drm_atomic_commit(display->device, SDL_TRUE)) {
if (drm_atomic_commit(display->device, SDL_TRUE, SDL_FALSE)) {
ret = SDL_SetError("Failed atomic commit in KMSDRM_ShowCursor.");
goto cleanup;
}
@ -491,7 +491,7 @@ KMSDRM_DeinitMouse(_THIS)
drm_atomic_set_plane_props(&info);
/* Wait until the cursor is unset from the cursor plane
before destroying it's BO. */
if (drm_atomic_commit(video_device, SDL_TRUE)) {
if (drm_atomic_commit(video_device, SDL_TRUE, SDL_FALSE)) {
SDL_SetError("Failed atomic commit in KMSDRM_DenitMouse.");
}
/* ..and finally destroy the cursor DRM BO! */

44
src/video/kmsdrm/SDL_kmsdrmopengles.c
View File

@ -224,7 +224,6 @@ KMSDRM_GLES_SwapWindowFenced(_THIS, SDL_Window * window)
uint32_t blob_id;
SDL_VideoData *viddata = (SDL_VideoData *)_this->driverdata;
dispdata->atomic_flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
add_connector_property(dispdata->atomic_req, dispdata->connector, "CRTC_ID", dispdata->crtc->crtc->crtc_id);
KMSDRM_drmModeCreatePropertyBlob(viddata->drm_fd, &dispdata->mode, sizeof(dispdata->mode), &blob_id);
add_crtc_property(dispdata->atomic_req, dispdata->crtc, "MODE_ID", blob_id);
@ -237,10 +236,15 @@ KMSDRM_GLES_SwapWindowFenced(_THIS, SDL_Window * window)
/* this must not block so the game can start building another */
/* frame, even if the just-requested pageflip hasnt't completed. */
/*****************************************************************/
if (drm_atomic_commit(_this, SDL_FALSE)) {
if (drm_atomic_commit(_this, SDL_FALSE, dispdata->modeset_pending)) {
return SDL_SetError("Failed to issue atomic commit on pageflip");
}
/* If we had a pending modesetting, we have done it by now. */
if (dispdata->modeset_pending) {
dispdata->modeset_pending = SDL_FALSE;
}
/* Release the previous front buffer so EGL can chose it as back buffer
and render on it again. */
if (windata->bo) {
@ -283,22 +287,23 @@ KMSDRM_GLES_SwapWindowDoubleBuffered(_THIS, SDL_Window * window)
KMSDRM_FBInfo *fb;
KMSDRM_PlaneInfo info = {0};
/****************************************************************************************************/
/* In double-buffer mode, atomic_commit will always be synchronous/blocking (ie: won't return until */
/* the requested changes are really done). */
/* Also, there's no need to fence KMS or the GPU, because we won't be entering game loop again */
/* (hence not building or executing a new cmdstring) until pageflip is done, so we don't need to */
/* protect the KMS/GPU access to the buffer. */
/****************************************************************************************************/
/**********************************************************************************/
/* In double-buffer mode, atomic_commit will always be synchronous/blocking (ie: */
/* won't return until the requested changes are really done). */ /* Also, there's no need to fence KMS or the GPU, because we won't be entering */
/* game loop again (hence not building or executing a new cmdstring) until */
/* pageflip is done, so we don't need to protect the KMS/GPU access to the buffer.*/
/**********************************************************************************/
/* Mark, at EGL level, the buffer that we want to become the new front buffer.
However, it won't really happen until we request a pageflip at the KMS level and it completes. */
It won't really happen until we request a pageflip at the KMS level and it
completes. */
if (! _this->egl_data->eglSwapBuffers(_this->egl_data->egl_display, windata->egl_surface)) {
return SDL_EGL_SetError("Failed to swap EGL buffers", "eglSwapBuffers");
}
/* Lock the buffer that is marked by eglSwapBuffers() to become the next front buffer (so it can not
be chosen by EGL as back buffer to draw on), and get a handle to it to request the pageflip on it. */
/* Lock the buffer that is marked by eglSwapBuffers() to become the next front buffer
(so it can not be chosen by EGL as back buffer to draw on), and get a handle to it,
to request the pageflip on it. */
windata->next_bo = KMSDRM_gbm_surface_lock_front_buffer(windata->gs);
if (!windata->next_bo) {
return SDL_SetError("Failed to lock frontbuffer");
@ -324,20 +329,25 @@ KMSDRM_GLES_SwapWindowDoubleBuffered(_THIS, SDL_Window * window)
/* Do we have a pending modesetting? If so, set the necessary
props so it's included in the incoming atomic commit. */
if (dispdata->modeset_pending) {
SDL_VideoData *viddata = (SDL_VideoData *)_this->driverdata;
uint32_t blob_id;
dispdata->atomic_flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
SDL_VideoData *viddata = (SDL_VideoData *)_this->driverdata;
add_connector_property(dispdata->atomic_req, dispdata->connector, "CRTC_ID", dispdata->crtc->crtc->crtc_id);
KMSDRM_drmModeCreatePropertyBlob(viddata->drm_fd, &dispdata->mode, sizeof(dispdata->mode), &blob_id);
add_crtc_property(dispdata->atomic_req, dispdata->crtc, "MODE_ID", blob_id);
add_crtc_property(dispdata->atomic_req, dispdata->crtc, "active", 1);
dispdata->modeset_pending = SDL_FALSE;
}
/* Issue the one and only atomic commit where all changes will be requested!.
Blocking for double buffering: won't return until completed. */
if (drm_atomic_commit(_this, SDL_TRUE)) {
return SDL_SetError("Failed to issue atomic commit");
if (drm_atomic_commit(_this, SDL_TRUE, dispdata->modeset_pending)) {
return SDL_SetError("Failed to issue atomic commit on pageflip");
}
/* If we had a pending modesetting, we have done it by now. */
if (dispdata->modeset_pending) {
dispdata->modeset_pending = SDL_FALSE;
}
/* Release last front buffer so EGL can chose it as back buffer and render on it again. */

68
src/video/kmsdrm/SDL_kmsdrmvideo.c
View File

@ -486,8 +486,8 @@ void get_planes_info(_THIS)
#endif
/* Get the plane_id of a plane that is of the specified plane type (primary,
overlay, cursor...) and can use the CRTC we have chosen previously. */
static int get_plane_id(_THIS, uint32_t plane_type)
overlay, cursor...) and can use specified CRTC. */
static int get_plane_id(_THIS, unsigned int crtc_id, uint32_t plane_type)
{
drmModeRes *resources = NULL;
drmModePlaneResPtr plane_resources = NULL;
@ -497,14 +497,13 @@ static int get_plane_id(_THIS, uint32_t plane_type)
int found = 0;
SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
SDL_DisplayData *dispdata = (SDL_DisplayData *)SDL_GetDisplayDriverData(0);
resources = KMSDRM_drmModeGetResources(viddata->drm_fd);
/* Get the crtc_index for the current CRTC.
It's needed to find out if a plane supports the CRTC. */
for (i = 0; i < resources->count_crtcs; i++) {
if (resources->crtcs[i] == dispdata->crtc->crtc->crtc_id) {
if (resources->crtcs[i] == crtc_id) {
crtc_index = i;
break;
}
@ -565,6 +564,7 @@ setup_plane(_THIS, struct plane **plane, uint32_t plane_type)
{
uint32_t plane_id;
SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
SDL_DisplayData *dispdata = (SDL_DisplayData *)SDL_GetDisplayDriverData(0);
int ret = 0;
*plane = SDL_calloc(1, sizeof(**plane));
@ -573,8 +573,8 @@ setup_plane(_THIS, struct plane **plane, uint32_t plane_type)
goto cleanup;
}
/* Get plane ID. */
plane_id = get_plane_id(_this, plane_type);
/* Get plane ID for a given CRTC and plane type. */
plane_id = get_plane_id(_this, dispdata->crtc->crtc->crtc_id, plane_type);
if (!plane_id) {
ret = SDL_SetError("Invalid Plane ID");
@ -671,19 +671,28 @@ drm_atomic_set_plane_props(struct KMSDRM_PlaneInfo *info)
add_plane_property(dispdata->atomic_req, info->plane, "CRTC_Y", info->crtc_y);
}
int drm_atomic_commit(_THIS, SDL_bool blocking)
int drm_atomic_commit(_THIS, SDL_bool blocking, SDL_bool allow_modeset)
{
SDL_DisplayData *dispdata = (SDL_DisplayData *)SDL_GetDisplayDriverData(0);
SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
uint32_t atomic_flags = 0;
int ret;
if (!blocking)
dispdata->atomic_flags |= DRM_MODE_ATOMIC_NONBLOCK;
if (!blocking) {
atomic_flags |= DRM_MODE_ATOMIC_NONBLOCK;
}
/* Never issue a new atomic commit if previous has not yet completed, or it will error. */
if (allow_modeset) {
atomic_flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
}
/* Never issue a new atomic commit if previous has not yet completed,
or it will error. */
drm_atomic_waitpending(_this);
ret = KMSDRM_drmModeAtomicCommit(viddata->drm_fd, dispdata->atomic_req, dispdata->atomic_flags, NULL);
ret = KMSDRM_drmModeAtomicCommit(viddata->drm_fd, dispdata->atomic_req,
atomic_flags, NULL);
if (ret) {
SDL_SetError("Atomic commit failed, returned %d.", ret);
/* Uncomment this for fast-debugging */
@ -701,7 +710,6 @@ int drm_atomic_commit(_THIS, SDL_bool blocking)
out:
KMSDRM_drmModeAtomicFree(dispdata->atomic_req);
dispdata->atomic_req = NULL;
dispdata->atomic_flags = 0;
return ret;
}
@ -886,7 +894,6 @@ VideoBootStrap KMSDRM_bootstrap = {
KMSDRM_CreateDevice
};
static void
KMSDRM_FBDestroyCallback(struct gbm_bo *bo, void *data)
{
@ -1010,7 +1017,6 @@ int KMSDRM_DisplayDataInit (_THIS, SDL_DisplayData *dispdata) {
int ret = 0;
unsigned i,j;
dispdata->atomic_flags = 0;
dispdata->atomic_req = NULL;
dispdata->kms_fence = NULL;
dispdata->gpu_fence = NULL;
@ -1326,6 +1332,30 @@ KMSDRM_DestroySurfaces(_THIS, SDL_Window *window)
SDL_DisplayData *dispdata = (SDL_DisplayData *)SDL_GetDisplayDriverData(0);
KMSDRM_PlaneInfo plane_info = {0};
/* TODO : Continue investigating why this doesn't work. We should do this instead
of making the display plane point to the TTY console, which isn't there
after creating and destroying a Vulkan window. */
#if 0
/* Disconnect the connector from the CRTC (remember: several connectors
can read a CRTC), deactivate the CRTC, and set the PRIMARY PLANE props
CRTC_ID and FB_ID to 0. Then we can destroy the GBM buffers and surface. */
add_connector_property(dispdata->atomic_req, dispdata->connector , "CRTC_ID", 0);
add_crtc_property(dispdata->atomic_req, dispdata->crtc , "MODE_ID", 0);
add_crtc_property(dispdata->atomic_req, dispdata->crtc , "active", 0);
plane_info.plane = dispdata->display_plane;
plane_info.crtc_id = 0;
plane_info.fb_id = 0;
drm_atomic_set_plane_props(&plane_info);
/* Issue atomic commit that is blocking and allows modesetting. */
if (drm_atomic_commit(_this, SDL_TRUE, SDL_TRUE)) {
SDL_SetError("Failed to issue atomic commit on surfaces destruction.");
}
#endif
#if 1
/************************************************************/
/* Make the display plane point to the original TTY buffer. */
/************************************************************/
@ -1340,9 +1370,10 @@ KMSDRM_DestroySurfaces(_THIS, SDL_Window *window)
drm_atomic_set_plane_props(&plane_info);
if (drm_atomic_commit(_this, SDL_TRUE)) {
if (drm_atomic_commit(_this, SDL_TRUE, SDL_FALSE)) {
SDL_SetError("Failed to issue atomic commit on surfaces destruction.");
}
#endif
/***************************/
/* Destroy the EGL surface */
@ -1467,6 +1498,7 @@ KMSDRM_DestroyWindow(_THIS, SDL_Window *window)
if (_this->egl_data) {
SDL_EGL_UnloadLibrary(_this);
}
/* Free display plane, and destroy GBM device. */
KMSDRM_GBMDeinit(_this, dispdata);
}
@ -1706,10 +1738,12 @@ KMSDRM_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
return SDL_SetError("Mode doesn't have an associated index");
}
/* Take note of the new mode. It will be used in SwapWindow to
set the props needed for mode setting. */
/* Take note of the new mode to be set. */
dispdata->mode = conn->modes[modedata->mode_index];
/* Take note that we have to change mode in SwapWindow(). We have to do it there
because we need a buffer of the new size so the commit that contains the
mode change can be completed OK. */
dispdata->modeset_pending = SDL_TRUE;
for (i = 0; i < viddata->num_windows; i++) {

3
src/video/kmsdrm/SDL_kmsdrmvideo.h
View File

@ -84,7 +84,6 @@ typedef struct SDL_DisplayData
{
drmModeModeInfo mode;
drmModeModeInfo preferred_mode;
uint32_t atomic_flags;
plane *display_plane;
plane *cursor_plane;
@ -173,7 +172,7 @@ KMSDRM_FBInfo *KMSDRM_FBFromBO(_THIS, struct gbm_bo *bo);
void drm_atomic_set_plane_props(struct KMSDRM_PlaneInfo *info);
void drm_atomic_waitpending(_THIS);
int drm_atomic_commit(_THIS, SDL_bool blocking);
int drm_atomic_commit(_THIS, SDL_bool blocking, SDL_bool allow_modeset);
int add_plane_property(drmModeAtomicReq *req, struct plane *plane,
const char *name, uint64_t value);
int add_crtc_property(drmModeAtomicReq *req, struct crtc *crtc,