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[Video/KMSDRM] Remove auxiliary AMDGPU compatibility workarounds not needed anymore.

This commit is contained in:
Manuel Alfayate Corchete 2020-12-19 23:32:09 +01:00
parent af1f91cb36
commit cf71e01734
2 changed files with 7 additions and 162 deletions
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131
src/video/kmsdrm/SDL_kmsdrmvideo.c
View File

@ -57,8 +57,6 @@
#define KMSDRM_DRI_PATH "/dev/dri/"
#define AMDGPU_COMPAT 1
static int set_client_caps (int fd)
{
if (KMSDRM_drmSetClientCap(fd, DRM_CLIENT_CAP_ATOMIC, 1)) {
@ -166,6 +164,8 @@ get_driindex(void)
return -ENOENT;
}
#if 0
/**********************/
/* DUMB BUFFER Block. */
/**********************/
@ -317,6 +317,8 @@ err:
/* DUMB BUFFER Block ends. */
/***************************/
#endif
/*********************************/
/* Atomic helper functions block */
/*********************************/
@ -1010,7 +1012,6 @@ int KMSDRM_DisplayDataInit (_THIS, SDL_DisplayData *dispdata) {
dispdata->kms_fence = NULL;
dispdata->gpu_fence = NULL;
dispdata->kms_out_fence_fd = -1;
dispdata->dumb_buffer = NULL;
dispdata->modeset_pending = SDL_FALSE;
dispdata->gbm_init = SDL_FALSE;
@ -1263,17 +1264,6 @@ KMSDRM_GBMInit (_THIS, SDL_DisplayData *dispdata)
viddata->drm_fd = open(viddata->devpath, O_RDWR | O_CLOEXEC);
set_client_caps(viddata->drm_fd);
/* Create aux dumb buffer. It's only useful to keep the PRIMARY PLANE occupied
when we destroy the GBM surface and it's KMS buffers, so not being able to
create it is not fatal. */
dispdata->dumb_buffer = KMSDRM_CreateBuffer(_this);
if (!dispdata->dumb_buffer) {
ret = SDL_SetError("can't create dumb buffer.");
} else {
/* Fill the dumb buffer with black pixels. */
KMSDRM_FillDumbBuffer(dispdata->dumb_buffer);
}
/* Create the GBM device. */
viddata->gbm_dev = KMSDRM_gbm_create_device(viddata->drm_fd);
if (!viddata->gbm_dev) {
@ -1296,96 +1286,8 @@ KMSDRM_GBMInit (_THIS, SDL_DisplayData *dispdata)
void
KMSDRM_GBMDeinit (_THIS, SDL_DisplayData *dispdata)
{
KMSDRM_PlaneInfo plane_info = {0};
SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
drmModeModeInfo mode;
uint32_t blob_id;
/*****************************************************************/
/* */
/* BLOCK to safely destroy the DUMB BUFFER. */
/* */
/* We come from DestroyWindow(), where both DestroySurfaces() */
/* and this GBMDeinit() are called, one after another. */
/* So the GBM/EGL surfaces and buffers of the windows have */
/* already been destroyed already and, because of that, the */
/* PRIMARY PLANE is using the DUMB BUFFER. BUT the DUMB BUFFER */
/* we use to keep the PRIMARY PLANE occupied when we do */
/* DestroySurfaces calls is going to be destroyed one way or */
/* another when the program quits so, to prevent the the kernel */
/* from disabling the CRTC when it detects the deletion of a */
/* buffer that IS IN USE BY THE PRIMARY PLANE, we do one of */
/* these: */
/* */
/* -In AMDGPU, where manually disabling the CRTC and */
/* disconnecting the CONNECTOR from the CRTC is an */
/* unrecoverable situation, we point the PRIMARY PLANE to */
/* the original TTY buffer (not guaranteed to be there for us!) */
/* and then destroy the DUMB BUFFER). */
/* */
/* -In other drivers, we 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 destroy the DUMB BUFFER. */
/* We can leave all like this if we are exiting the program: */
/* FBCON or whatever will reconfigure things as it needs. */
/* */
/*****************************************************************/
/* dispdata->crtc->crtc->mode is the original video mode that was
configured on the connector when we lauched the program,
dispdata->mode is the current video mode, which could be different,
and dispdata->preferred_mode is the native display mode. */
mode = dispdata->crtc->crtc->mode;
#if AMDGPU_COMPAT
/* This won't work if the console wasn't correctly restored when a prevous
program exited, because in that case the TTY buffer won't be in
crtc->crtc->buffer_id, so the following atomic commit will fail. */
plane_info.plane = dispdata->display_plane;
plane_info.crtc_id = dispdata->crtc->crtc->crtc_id;
plane_info.fb_id = dispdata->crtc->crtc->buffer_id;
plane_info.src_w = mode.hdisplay;
plane_info.src_h = mode.vdisplay;
plane_info.crtc_w = mode.hdisplay;
plane_info.crtc_h = mode.vdisplay;
drm_atomic_set_plane_props(&plane_info);
#else
add_connector_property(dispdata->atomic_req, dispdata->connector , "CRTC_ID", 0);
add_crtc_property(dispdata->atomic_req, dispdata->crtc , "ACTIVE", 0);
/* Since we initialize plane_info to all zeros,
ALL PRIMARY PLANE props are set to 0 with this,
including FB_ID and CRTC_ID.
Not all drivers like FB_ID and CRTC_ID to 0 yet. */
plane_info.plane = dispdata->display_plane;
drm_atomic_set_plane_props(&plane_info);
#endif
/* Set the props that restore the original video mode. */
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, &mode, sizeof(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);
/* Issue blocking atomic commit. */
if (drm_atomic_commit(_this, SDL_TRUE)) {
SDL_SetError("Failed to issue atomic commit on video quitting.");
}
/* Destroy the DUMB buffer if it exists, now that it's not being
used anymore by the PRIMARY PLANE. */
if (dispdata->dumb_buffer) {
KMSDRM_DestroyDumbBuffer(_this, &dispdata->dumb_buffer);
}
/*************************************************/
/* BLOCK to safely destroy the dumb buffer ENDS. */
/*************************************************/
/* Free display plane */
free_plane(&dispdata->display_plane);
@ -1425,12 +1327,13 @@ KMSDRM_DestroySurfaces(_THIS, SDL_Window *window)
/********************************************************************/
/* BLOCK 1: protect the PRIMARY PLANE before destroying the buffers */
/* it's using, by making it point to the dumb buffer. */
/* it's using, by making it point to the original CRTC buffer, */
/* where the TTY console should be. */
/********************************************************************/
plane_info.plane = dispdata->display_plane;
plane_info.crtc_id = dispdata->crtc->crtc->crtc_id;
plane_info.fb_id = dispdata->dumb_buffer->fb_id;
plane_info.fb_id = dispdata->crtc->crtc->buffer_id;
plane_info.src_w = dispdata->mode.hdisplay;
plane_info.src_h = dispdata->mode.vdisplay;
plane_info.crtc_w = dispdata->mode.hdisplay;
@ -1460,7 +1363,6 @@ KMSDRM_DestroySurfaces(_THIS, SDL_Window *window)
windata->next_bo = NULL;
}
/***************************************************************************/
/* Destroy the EGL surface. */
/* In this eglMakeCurrent() call, we disable the current EGL surface */
@ -1576,25 +1478,6 @@ KMSDRM_DestroyWindow(_THIS, SDL_Window *window)
}
}
#if AMDGPU_COMPAT
/* Since vkDestroySurfaceKHR does not destroy the native surface (only the Vulkan one),
runnin Vulkan programs leave the last buffer connected to the primary plane,
at least on AMDGPU, and the TTY buffer isn't restored.
That's not a big problem, but running a GLES program after that will cause the
atomic commit we do for restoring the TTY buffer to fail, because the TTY buffer
isn't there when we launch the GLES program.
So what we do here is "hack" Vulkan and restore the TTY buffer here, as if
we were running a GLES program. We get here after the program's vkDestroySurfaceKHR
has been called, which allows us to think as if we were in the beginig
of a GLES program.
THIS IS DONE IN A SEPARATE BLOCK FOR POSSIBLE EASY FUTURE REMOVAL. DON'T OPTIMIZE. */
if (is_vulkan) {
KMSDRM_GBMInit(_this, dispdata);
KMSDRM_GBMDeinit(_this, dispdata);
}
#endif
/********************************************/
/* Remove from the internal SDL window list */
/********************************************/

38
src/video/kmsdrm/SDL_kmsdrmvideo.h
View File

@ -39,42 +39,6 @@
#include <EGL/eglext.h>
#endif
/* Headers related to dumb buffer creation. */
#include <drm_fourcc.h>
#include <sys/mman.h>
/**********************/
/* DUMB BUFFER Block. */
/**********************/
typedef struct dumb_buffer {
/* The GEM handle for this buffer, returned by the creation ioctl. */
uint32_t gem_handles[4];
/* The framebuffer ID which is passed to KMS to display. */
uint32_t fb_id;
uint32_t format;
uint64_t modifier;
/* Parameters for our memory-mapped image. */
struct {
uint32_t *mem;
unsigned int size;
} dumb;
unsigned int width;
unsigned int height;
unsigned int pitches[4]; /* in bytes */
unsigned int offsets[4]; /* in bytes */
} dumb_buffer;
/***************************/
/* DUMB BUFFER Block ends. */
/***************************/
/****************************************************************************************/
/* Driverdata pointers are void struct* used to store backend-specific variables */
/* and info that supports the SDL-side structs like SDL Display Devices, SDL_Windows... */
@ -141,8 +105,6 @@ typedef struct SDL_DisplayData
EGLSurface old_egl_surface;
#endif
dumb_buffer *dumb_buffer;
SDL_bool modeset_pending;
SDL_bool gbm_init;