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SDL_kmsdrmvideo.c
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/*
Simple DirectMedia Layer
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Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_VIDEO_DRIVER_KMSDRM
/* SDL internals */
#include "../SDL_sysvideo.h"
#include "SDL_syswm.h"
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#include "SDL_hints.h"
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#include "../../events/SDL_events_c.h"
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#include "../../events/SDL_mouse_c.h"
#include "../../events/SDL_keyboard_c.h"
#ifdef SDL_INPUT_LINUXEV
#include "../../core/linux/SDL_evdev.h"
#endif
/* KMS/DRM declarations */
#include "SDL_kmsdrmvideo.h"
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#include "SDL_kmsdrmevents.h"
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#include "SDL_kmsdrmopengles.h"
#include "SDL_kmsdrmmouse.h"
#include "SDL_kmsdrmdyn.h"
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#include <sys/stat.h>
#include <dirent.h>
#include <errno.h>
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#include <poll.h>
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#define KMSDRM_DRI_PATH "/dev/dri/"
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static int
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check_modesetting(int devindex)
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{
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SDL_bool available = SDL_FALSE;
char device[512];
int drm_fd;
SDL_snprintf(device, sizeof (device), "%scard%d", KMSDRM_DRI_PATH, devindex);
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SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "check_modesetting: probing \"%s\"", device);
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drm_fd = open(device, O_RDWR | O_CLOEXEC);
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if (drm_fd >= 0) {
if (SDL_KMSDRM_LoadSymbols()) {
drmModeRes *resources = KMSDRM_drmModeGetResources(drm_fd);
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if (resources) {
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SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "%scard%d connector, encoder and CRTC counts are: %d %d %d",
KMSDRM_DRI_PATH, devindex,
resources->count_connectors, resources->count_encoders, resources->count_crtcs);
if (resources->count_connectors > 0 && resources->count_encoders > 0 && resources->count_crtcs > 0) {
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for (int i = 0; i < resources->count_connectors; i++) {
drmModeConnector *conn = KMSDRM_drmModeGetConnector(drm_fd, resources->connectors[i]);
if (!conn) {
continue;
}
if (conn->connection == DRM_MODE_CONNECTED && conn->count_modes) {
available = SDL_TRUE;
}
KMSDRM_drmModeFreeConnector(conn);
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if (available) {
break;
}
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}
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}
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KMSDRM_drmModeFreeResources(resources);
}
SDL_KMSDRM_UnloadSymbols();
}
close(drm_fd);
}
return available;
}
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static int get_dricount(void)
{
int devcount = 0;
struct dirent *res;
struct stat sb;
DIR *folder;
if (!(stat(KMSDRM_DRI_PATH, &sb) == 0
&& S_ISDIR(sb.st_mode))) {
printf("The path %s cannot be opened or is not available\n",
KMSDRM_DRI_PATH);
return 0;
}
if (access(KMSDRM_DRI_PATH, F_OK) == -1) {
printf("The path %s cannot be opened\n",
KMSDRM_DRI_PATH);
return 0;
}
folder = opendir(KMSDRM_DRI_PATH);
if (folder) {
while ((res = readdir(folder))) {
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int len = SDL_strlen(res->d_name);
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if (len > 4 && SDL_strncmp(res->d_name, "card", 4) == 0) {
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devcount++;
}
}
closedir(folder);
}
return devcount;
}
static int
get_driindex(void)
{
const int devcount = get_dricount();
int i;
for (i = 0; i < devcount; i++) {
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if (check_modesetting(i)) {
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return i;
}
}
return -ENOENT;
}
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/*********************************/
/* Atomic helper functions block */
/*********************************/
#define VOID2U64(x) ((uint64_t)(unsigned long)(x))
static int add_connector_property(drmModeAtomicReq *req, uint32_t obj_id,
const char *name, uint64_t value)
{
SDL_DisplayData *dispdata = (SDL_DisplayData *)SDL_GetDisplayDriverData(0);
unsigned int i;
int prop_id = 0;
for (i = 0 ; i < dispdata->connector_props->count_props ; i++) {
if (strcmp(dispdata->connector_props_info[i]->name, name) == 0) {
prop_id = dispdata->connector_props_info[i]->prop_id;
break;
}
}
if (prop_id < 0) {
printf("no connector property: %s\n", name);
return -EINVAL;
}
return KMSDRM_drmModeAtomicAddProperty(req, obj_id, prop_id, value);
}
static int add_crtc_property(drmModeAtomicReq *req, uint32_t obj_id,
const char *name, uint64_t value)
{
SDL_DisplayData *dispdata = (SDL_DisplayData *)SDL_GetDisplayDriverData(0);
unsigned int i;
int prop_id = -1;
for (i = 0 ; i < dispdata->crtc_props->count_props ; i++) {
if (strcmp(dispdata->crtc_props_info[i]->name, name) == 0) {
prop_id = dispdata->crtc_props_info[i]->prop_id;
break;
}
}
if (prop_id < 0) {
printf("no crtc property: %s\n", name);
return -EINVAL;
}
return KMSDRM_drmModeAtomicAddProperty(req, obj_id, prop_id, value);
}
static int add_plane_property(drmModeAtomicReq *req, uint32_t obj_id,
const char *name, uint64_t value)
{
SDL_DisplayData *dispdata = (SDL_DisplayData *)SDL_GetDisplayDriverData(0);
unsigned int i;
int prop_id = -1;
for (i = 0 ; i < dispdata->plane_props->count_props ; i++) {
if (strcmp(dispdata->plane_props_info[i]->name, name) == 0) {
prop_id = dispdata->plane_props_info[i]->prop_id;
break;
}
}
if (prop_id < 0) {
printf("no plane property: %s\n", name);
return -EINVAL;
}
return KMSDRM_drmModeAtomicAddProperty(req, obj_id, prop_id, value);
}
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#if 0
static void get_plane_properties() {
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uint32_t i;
dispdata->plane_ = drmModeObjectGetProperties(viddata->drm_fd,
plane->plane_id, DRM_MODE_OBJECT_PLANE);
if (!dispdata->type.props) {
printf("could not get %s %u properties: %s\n",
#type, id, strerror(errno));
return NULL;
}
dispdata->type->props_info = calloc(dispdata->type.props->count_props,
sizeof(*dispdata->type->props_info));
for (i = 0; i < dispdata->type->props->count_props; i++) {
dispdata->type.props_info[i] = drmModeGetProperty(viddata->drm_fd,
dispdata->type->props->props[i]);
}
return props;
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}
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void print_plane_info(_THIS, drmModePlanePtr plane)
{
char *plane_type;
drmModeRes *resources;
uint32_t type = 0;
SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
drmModeObjectPropertiesPtr props = KMSDRM_drmModeObjectGetProperties(viddata->drm_fd,
plane->plane_id, DRM_MODE_OBJECT_PLANE);
/* Search the plane props for the plane type. */
for (int j = 0; j < props->count_props; j++) {
drmModePropertyPtr p = KMSDRM_drmModeGetProperty(viddata->drm_fd, props->props[j]);
if ((strcmp(p->name, "type") == 0)) {
type = props->prop_values[j];
}
KMSDRM_drmModeFreeProperty(p);
}
switch (type) {
case DRM_PLANE_TYPE_OVERLAY:
plane_type = "overlay";
break;
case DRM_PLANE_TYPE_PRIMARY:
plane_type = "primary";
break;
case DRM_PLANE_TYPE_CURSOR:
plane_type = "cursor";
break;
}
/* Remember that, to present a plane on screen, it has to be connected to a CRTC so the CRTC scans it,
scales it, etc... and presents it on screen. */
/* Now we look for the CRTCs supported by the plane. */
resources = KMSDRM_drmModeGetResources(viddata->drm_fd);
if (!resources)
return;
printf("--PLANE ID: %d\nPLANE TYPE: %s\nCRTC READING THIS PLANE: %d\nCRTCS SUPPORTED BY THIS PLANE: ", plane->plane_id, plane_type, plane->crtc_id);
for (int i = 0; i < resources->count_crtcs; i++) {
if (plane->possible_crtcs & (1 << i)) {
uint32_t crtc_id = resources->crtcs[i];
printf ("%d", crtc_id);
break;
}
}
printf ("\n\n");
}
void get_planes_info(_THIS)
{
drmModePlaneResPtr plane_resources;
uint32_t i;
SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
SDL_DisplayData *dispdata = (SDL_DisplayData *)SDL_GetDisplayDriverData(0);
plane_resources = KMSDRM_drmModeGetPlaneResources(viddata->drm_fd);
if (!plane_resources) {
printf("drmModeGetPlaneResources failed: %s\n", strerror(errno));
return;
}
printf("--Number of planes found: %d-- \n", plane_resources->count_planes);
printf("--Usable CRTC that we have chosen: %d-- \n", dispdata->crtc->crtc_id);
/* Iterate on all the available planes. */
for (i = 0; (i < plane_resources->count_planes); i++) {
uint32_t plane_id = plane_resources->planes[i];
drmModePlanePtr plane = KMSDRM_drmModeGetPlane(viddata->drm_fd, plane_id);
if (!plane) {
printf("drmModeGetPlane(%u) failed: %s\n", plane_id, strerror(errno));
continue;
}
/* Print plane info. */
print_plane_info(_this, plane);
KMSDRM_drmModeFreePlane(plane);
}
KMSDRM_drmModeFreePlaneResources(plane_resources);
}
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#endif
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/* Get a plane that is PRIMARY (there's no guarantee that we have overlays in all hardware,
so we can really only count on having one primary plane) and can use the CRTC we have chosen. */
uint32_t get_plane_id(_THIS, drmModeRes *resources)
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{
drmModePlaneResPtr plane_resources;
uint32_t i, j;
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uint32_t crtc_index = 0;
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int ret = -EINVAL;
int found_primary = 0;
SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
SDL_DisplayData *dispdata = (SDL_DisplayData *)SDL_GetDisplayDriverData(0);
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/* Get the crtc_index for the current CRTC. Needed to find out if a plane supports the CRTC. */
for (i = 0; i < resources->count_crtcs; i++) {
if (resources->crtcs[i] == dispdata->crtc_id) {
crtc_index = i;
break;
}
}
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plane_resources = KMSDRM_drmModeGetPlaneResources(viddata->drm_fd);
if (!plane_resources) {
printf("drmModeGetPlaneResources failed: %s\n", strerror(errno));
return -1;
}
/* Iterate on all the available planes. */
for (i = 0; (i < plane_resources->count_planes) && !found_primary; i++) {
uint32_t plane_id = plane_resources->planes[i];
drmModePlanePtr plane = KMSDRM_drmModeGetPlane(viddata->drm_fd, plane_id);
if (!plane) {
printf("drmModeGetPlane(%u) failed: %s\n", plane_id, strerror(errno));
continue;
}
/* See if the current CRTC is available for this plane. */
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if (plane->possible_crtcs & (1 << crtc_index)) {
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drmModeObjectPropertiesPtr props = KMSDRM_drmModeObjectGetProperties(viddata->drm_fd,
plane_id, DRM_MODE_OBJECT_PLANE);
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ret = plane_id;
/* Search the plane props, to see if it's a primary plane. */
for (j = 0; j < props->count_props; j++) {
drmModePropertyPtr p = KMSDRM_drmModeGetProperty(viddata->drm_fd, props->props[j]);
if ((strcmp(p->name, "type") == 0) &&
(props->prop_values[j] == DRM_PLANE_TYPE_PRIMARY)) {
/* found our primary plane, lets use that: */
found_primary = 1;
}
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KMSDRM_drmModeFreeProperty(p);
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}
KMSDRM_drmModeFreeObjectProperties(props);
}
KMSDRM_drmModeFreePlane(plane);
}
KMSDRM_drmModeFreePlaneResources(plane_resources);
return ret;
}
int drm_atomic_commit(_THIS, uint32_t fb_id, uint32_t flags)
{
SDL_DisplayData *dispdata = (SDL_DisplayData *)SDL_GetDisplayDriverData(0);
SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
uint32_t plane_id = dispdata->plane->plane_id;
uint32_t blob_id;
drmModeAtomicReq *req;
int ret;
req = KMSDRM_drmModeAtomicAlloc();
if (flags & DRM_MODE_ATOMIC_ALLOW_MODESET) {
if (add_connector_property(req, dispdata->connector->connector_id, "CRTC_ID",
dispdata->crtc_id) < 0)
return -1;
if (KMSDRM_drmModeCreatePropertyBlob(viddata->drm_fd, &dispdata->mode, sizeof(dispdata->mode),
&blob_id) != 0)
return -1;
if (add_crtc_property(req, dispdata->crtc_id, "MODE_ID", blob_id) < 0)
return -1;
if (add_crtc_property(req, dispdata->crtc_id, "ACTIVE", 1) < 0)
return -1;
}
add_plane_property(req, plane_id, "FB_ID", fb_id);
add_plane_property(req, plane_id, "CRTC_ID", dispdata->crtc_id);
add_plane_property(req, plane_id, "SRC_X", 0);
add_plane_property(req, plane_id, "SRC_Y", 0);
add_plane_property(req, plane_id, "SRC_W", dispdata->mode.hdisplay << 16);
add_plane_property(req, plane_id, "SRC_H", dispdata->mode.vdisplay << 16);
add_plane_property(req, plane_id, "CRTC_X", 0);
add_plane_property(req, plane_id, "CRTC_Y", 0);
add_plane_property(req, plane_id, "CRTC_W", dispdata->mode.hdisplay);
add_plane_property(req, plane_id, "CRTC_H", dispdata->mode.vdisplay);
if (dispdata->kms_in_fence_fd != -1) {
add_crtc_property(req, dispdata->crtc_id, "OUT_FENCE_PTR",
VOID2U64(&dispdata->kms_out_fence_fd));
add_plane_property(req, plane_id, "IN_FENCE_FD", dispdata->kms_in_fence_fd);
}
ret = KMSDRM_drmModeAtomicCommit(viddata->drm_fd, req, flags, NULL);
if (ret)
goto out;
if (dispdata->kms_in_fence_fd != -1) {
close(dispdata->kms_in_fence_fd);
dispdata->kms_in_fence_fd = -1;
}
out:
KMSDRM_drmModeAtomicFree(req);
return ret;
}
/***************************************/
/* End of Atomic helper functions block*/
/***************************************/
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static int
KMSDRM_Available(void)
{
int ret = -ENOENT;
ret = get_driindex();
if (ret >= 0)
return 1;
return ret;
}
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static void
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KMSDRM_DeleteDevice(SDL_VideoDevice * device)
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{
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if (device->driverdata) {
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SDL_free(device->driverdata);
device->driverdata = NULL;
}
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SDL_free(device);
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SDL_KMSDRM_UnloadSymbols();
}
static SDL_VideoDevice *
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KMSDRM_CreateDevice(int devindex)
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{
SDL_VideoDevice *device;
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SDL_VideoData *viddata;
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if (!KMSDRM_Available()) {
return NULL;
}
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if (!devindex || (devindex > 99)) {
devindex = get_driindex();
}
if (devindex < 0) {
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SDL_SetError("devindex (%d) must be between 0 and 99.\n", devindex);
return NULL;
}
if (!SDL_KMSDRM_LoadSymbols()) {
return NULL;
}
device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
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if (!device) {
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SDL_OutOfMemory();
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return NULL;
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}
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viddata = (SDL_VideoData *) SDL_calloc(1, sizeof(SDL_VideoData));
if (!viddata) {
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SDL_OutOfMemory();
goto cleanup;
}
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viddata->devindex = devindex;
viddata->drm_fd = -1;
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device->driverdata = viddata;
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/* Setup all functions that can be handled from this backend. */
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device->VideoInit = KMSDRM_VideoInit;
device->VideoQuit = KMSDRM_VideoQuit;
device->GetDisplayModes = KMSDRM_GetDisplayModes;
device->SetDisplayMode = KMSDRM_SetDisplayMode;
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device->CreateSDLWindow = KMSDRM_CreateWindow;
device->CreateSDLWindowFrom = KMSDRM_CreateWindowFrom;
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device->SetWindowTitle = KMSDRM_SetWindowTitle;
device->SetWindowIcon = KMSDRM_SetWindowIcon;
device->SetWindowPosition = KMSDRM_SetWindowPosition;
device->SetWindowSize = KMSDRM_SetWindowSize;
device->ShowWindow = KMSDRM_ShowWindow;
device->HideWindow = KMSDRM_HideWindow;
device->RaiseWindow = KMSDRM_RaiseWindow;
device->MaximizeWindow = KMSDRM_MaximizeWindow;
device->MinimizeWindow = KMSDRM_MinimizeWindow;
device->RestoreWindow = KMSDRM_RestoreWindow;
device->SetWindowGrab = KMSDRM_SetWindowGrab;
device->DestroyWindow = KMSDRM_DestroyWindow;
device->GetWindowWMInfo = KMSDRM_GetWindowWMInfo;
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#if SDL_VIDEO_OPENGL_EGL
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device->GL_LoadLibrary = KMSDRM_GLES_LoadLibrary;
device->GL_GetProcAddress = KMSDRM_GLES_GetProcAddress;
device->GL_UnloadLibrary = KMSDRM_GLES_UnloadLibrary;
device->GL_CreateContext = KMSDRM_GLES_CreateContext;
device->GL_MakeCurrent = KMSDRM_GLES_MakeCurrent;
device->GL_SetSwapInterval = KMSDRM_GLES_SetSwapInterval;
device->GL_GetSwapInterval = KMSDRM_GLES_GetSwapInterval;
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if (SDL_GetHintBoolean(SDL_HINT_VIDEO_DOUBLE_BUFFER, SDL_FALSE))
device->GL_SwapWindow = KMSDRM_GLES_SwapWindowDB;
else
device->GL_SwapWindow = KMSDRM_GLES_SwapWindow;
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device->GL_DeleteContext = KMSDRM_GLES_DeleteContext;
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#endif
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device->PumpEvents = KMSDRM_PumpEvents;
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device->free = KMSDRM_DeleteDevice;
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return device;
cleanup:
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if (device)
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SDL_free(device);
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if (viddata)
SDL_free(viddata);
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return NULL;
}
VideoBootStrap KMSDRM_bootstrap = {
"KMSDRM",
"KMS/DRM Video Driver",
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KMSDRM_CreateDevice
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};
static void
KMSDRM_FBDestroyCallback(struct gbm_bo *bo, void *data)
{
KMSDRM_FBInfo *fb_info = (KMSDRM_FBInfo *)data;
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if (fb_info && fb_info->drm_fd >= 0 && fb_info->fb_id != 0) {
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KMSDRM_drmModeRmFB(fb_info->drm_fd, fb_info->fb_id);
SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "Delete DRM FB %u", fb_info->fb_id);
}
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SDL_free(fb_info);
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}
KMSDRM_FBInfo *
KMSDRM_FBFromBO(_THIS, struct gbm_bo *bo)
{
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SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
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unsigned w,h;
int ret;
Uint32 stride, handle;
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/* Check for an existing framebuffer */
KMSDRM_FBInfo *fb_info = (KMSDRM_FBInfo *)KMSDRM_gbm_bo_get_user_data(bo);
if (fb_info) {
616
617
618
return fb_info;
}
619
620
/* Create a structure that contains enough info to remove the framebuffer
when the backing buffer is destroyed */
621
fb_info = (KMSDRM_FBInfo *)SDL_calloc(1, sizeof(KMSDRM_FBInfo));
622
623
if (!fb_info) {
624
625
626
SDL_OutOfMemory();
return NULL;
}
627
628
fb_info->drm_fd = viddata->drm_fd;
629
630
/* Create framebuffer object for the buffer */
631
632
633
634
635
w = KMSDRM_gbm_bo_get_width(bo);
h = KMSDRM_gbm_bo_get_height(bo);
stride = KMSDRM_gbm_bo_get_stride(bo);
handle = KMSDRM_gbm_bo_get_handle(bo).u32;
ret = KMSDRM_drmModeAddFB(viddata->drm_fd, w, h, 24, 32, stride, handle,
636
637
638
639
&fb_info->fb_id);
if (ret) {
SDL_free(fb_info);
return NULL;
640
}
641
642
643
SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "New DRM FB (%u): %ux%u, stride %u from BO %p",
fb_info->fb_id, w, h, stride, (void *)bo);
644
645
646
/* Associate our DRM framebuffer with this buffer object */
KMSDRM_gbm_bo_set_user_data(bo, fb_info, KMSDRM_FBDestroyCallback);
647
648
649
650
651
652
653
654
return fb_info;
}
/*****************************************************************************/
/* SDL Video and Display initialization/handling functions */
/* _this is a SDL_VideoDevice * */
/*****************************************************************************/
655
static void
656
657
658
659
KMSDRM_DestroySurfaces(_THIS, SDL_Window * window)
{
SDL_WindowData *windata = (SDL_WindowData *)window->driverdata;
660
661
662
if (windata->bo) {
KMSDRM_gbm_surface_release_buffer(windata->gs, windata->bo);
windata->bo = NULL;
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
}
if (windata->next_bo) {
KMSDRM_gbm_surface_release_buffer(windata->gs, windata->next_bo);
windata->next_bo = NULL;
}
#if SDL_VIDEO_OPENGL_EGL
SDL_EGL_MakeCurrent(_this, EGL_NO_SURFACE, EGL_NO_CONTEXT);
if (windata->egl_surface != EGL_NO_SURFACE) {
SDL_EGL_DestroySurface(_this, windata->egl_surface);
windata->egl_surface = EGL_NO_SURFACE;
}
#endif
if (windata->gs) {
KMSDRM_gbm_surface_destroy(windata->gs);
windata->gs = NULL;
}
}
int
KMSDRM_CreateSurfaces(_THIS, SDL_Window * window)
{
SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
SDL_WindowData *windata = (SDL_WindowData *)window->driverdata;
SDL_DisplayData *dispdata = (SDL_DisplayData *) SDL_GetDisplayForWindow(window)->driverdata;
Uint32 width = dispdata->mode.hdisplay;
Uint32 height = dispdata->mode.vdisplay;
Uint32 surface_fmt = GBM_FORMAT_XRGB8888;
Uint32 surface_flags = GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING;
695
#if SDL_VIDEO_OPENGL_EGL
696
EGLContext egl_context;
697
#endif
698
699
if (!KMSDRM_gbm_device_is_format_supported(viddata->gbm_dev, surface_fmt, surface_flags)) {
700
701
702
703
704
SDL_LogWarn(SDL_LOG_CATEGORY_VIDEO, "GBM surface format not supported. Trying anyway.");
}
#if SDL_VIDEO_OPENGL_EGL
SDL_EGL_SetRequiredVisualId(_this, surface_fmt);
705
egl_context = (EGLContext)SDL_GL_GetCurrentContext();
706
707
708
709
#endif
KMSDRM_DestroySurfaces(_this, window);
710
windata->gs = KMSDRM_gbm_surface_create(viddata->gbm_dev, width, height, surface_fmt, surface_flags);
711
712
713
714
715
716
717
718
719
720
721
722
723
724
if (!windata->gs) {
return SDL_SetError("Could not create GBM surface");
}
#if SDL_VIDEO_OPENGL_EGL
windata->egl_surface = SDL_EGL_CreateSurface(_this, (NativeWindowType)windata->gs);
if (windata->egl_surface == EGL_NO_SURFACE) {
return SDL_SetError("Could not create EGL window surface");
}
SDL_EGL_MakeCurrent(_this, windata->egl_surface, egl_context);
725
windata->egl_surface_dirty = SDL_FALSE;
726
727
#endif
728
729
/* We take note here about the need to do a modeset in the atomic_commit(),
called in KMSDRM_GLES_SwapWindow(). */
730
dispdata->modeset_pending = SDL_TRUE;
731
732
733
734
return 0;
}
735
736
737
738
int
KMSDRM_VideoInit(_THIS)
{
int ret = 0;
739
740
SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
SDL_DisplayData *dispdata = NULL;
741
742
drmModeRes *resources = NULL;
drmModeEncoder *encoder = NULL;
743
744
char devname[32];
SDL_VideoDisplay display = {0};
745
746
747
748
dispdata = (SDL_DisplayData *) SDL_calloc(1, sizeof(SDL_DisplayData));
if (!dispdata) {
749
750
751
752
753
754
return SDL_OutOfMemory();
}
SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "KMSDRM_VideoInit()");
/* Open /dev/dri/cardNN */
755
756
757
758
SDL_snprintf(devname, sizeof(devname), "/dev/dri/card%d", viddata->devindex);
SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "Opening device %s", devname);
viddata->drm_fd = open(devname, O_RDWR | O_CLOEXEC);
759
760
761
if (viddata->drm_fd < 0) {
ret = SDL_SetError("Could not open %s", devname);
762
763
764
goto cleanup;
}
765
766
SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "Opened DRM FD (%d)", viddata->drm_fd);
767
768
viddata->gbm_dev = KMSDRM_gbm_create_device(viddata->drm_fd);
if (!viddata->gbm_dev) {
769
770
771
772
ret = SDL_SetError("Couldn't create gbm device.");
goto cleanup;
}
773
774
/* Get all of the available connectors / devices / crtcs */
resources = KMSDRM_drmModeGetResources(viddata->drm_fd);
775
if (!resources) {
776
ret = SDL_SetError("drmModeGetResources(%d) failed", viddata->drm_fd);
777
778
779
goto cleanup;
}
780
/* Iterate on the available connectors to find a connected connector. */
781
782
783
784
for (int i = 0; i < resources->count_connectors; i++) {
drmModeConnector *conn = KMSDRM_drmModeGetConnector(viddata->drm_fd, resources->connectors[i]);
if (!conn) {
785
continue;
786
}
787
788
if (conn->connection == DRM_MODE_CONNECTED && conn->count_modes) {
789
SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "Found connector %d with %d modes.",
790
conn->connector_id, conn->count_modes);
791
792
dispdata->connector = conn;
dispdata->connector_id = conn->connector_id;
793
794
795
break;
}
796
KMSDRM_drmModeFreeConnector(conn);
797
798
}
799
if (!dispdata->connector) {
800
801
802
803
ret = SDL_SetError("No currently active connector found.");
goto cleanup;
}
804
805
806
/* Try to find the connector's current encoder */
for (int i = 0; i < resources->count_encoders; i++) {
encoder = KMSDRM_drmModeGetEncoder(viddata->drm_fd, resources->encoders[i]);
807
808
809
if (!encoder) {
continue;
810
811
}
812
if (encoder->encoder_id == dispdata->connector->encoder_id) {
813
SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "Found encoder %d.", encoder->encoder_id);
814
815
816
817
break;
}
KMSDRM_drmModeFreeEncoder(encoder);
818
encoder = NULL;
819
820
}
821
822
823
824
825
826
827
828
829
if (!encoder) {
/* No encoder was connected, find the first supported one */
for (int i = 0, j; i < resources->count_encoders; i++) {
encoder = KMSDRM_drmModeGetEncoder(viddata->drm_fd, resources->encoders[i]);
if (!encoder) {
continue;
}
830
831
for (j = 0; j < dispdata->connector->count_encoders; j++) {
if (dispdata->connector->encoders[j] == encoder->encoder_id) {
832
833
834
835
break;
}
}
836
if (j != dispdata->connector->count_encoders) {
837
838
839
840
841
842
843
844
845
break;
}
KMSDRM_drmModeFreeEncoder(encoder);
encoder = NULL;
}
}
if (!encoder) {
846
847
848
849
ret = SDL_SetError("No connected encoder found.");
goto cleanup;
}
850
SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "Found encoder %d.", encoder->encoder_id);
851
852
/* Try to find a CRTC connected to this encoder */
853
dispdata->crtc = KMSDRM_drmModeGetCrtc(viddata->drm_fd, encoder->crtc_id);
854
855
856
/* If no CRTC was connected to the encoder, find the first CRTC that is supported by the encoder, and use that. */
if (!dispdata->crtc) {
857
for (int i = 0; i < resources->count_crtcs; i++) {
858
859
if (encoder->possible_crtcs & (1 << i)) {
encoder->crtc_id = resources->crtcs[i];
860
dispdata->crtc = KMSDRM_drmModeGetCrtc(viddata->drm_fd, encoder->crtc_id);
861
862
863
864
865
break;
}
}
}
866
if (!dispdata->crtc) {
867
868
869
870
ret = SDL_SetError("No CRTC found.");
goto cleanup;
}
871
872
873
874
875
876
877
878
879
880
881
882
/* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "Saved crtc_id %u, fb_id %u, (%u,%u), %ux%u",
dispdata->crtc->crtc_id, dispdata->crtc->buffer_id, dispdata->crtc->x,
dispdata->crtc->y, dispdata->crtc->width, dispdata->crtc->height);
*/
dispdata->crtc_id = dispdata->crtc->crtc_id;
dispdata->crtc = KMSDRM_drmModeGetCrtc(viddata->drm_fd, dispdata->crtc_id);
/****************/
/* Atomic block */
/****************/
883
884
885
/* Initialize the fences and their fds: */
dispdata->kms_fence = NULL;
dispdata->gpu_fence = NULL;
886
dispdata->kms_out_fence_fd = -1,
887
dispdata->kms_in_fence_fd = -1,
888
dispdata->modeset_pending = SDL_FALSE;
889
890
891
892
/*********************/
/* Atomic block ends */
/*********************/
893
894
895
/* Figure out the default mode to be set. If the current CRTC's mode isn't
valid, select the first mode supported by the connector
896
897
FIXME find first mode that specifies DRM_MODE_TYPE_PREFERRED */
898
dispdata->mode = dispdata->crtc->mode;
899
900
if (dispdata->crtc->mode_valid == 0) {
901
902
SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO,
"Current mode is invalid, selecting connector's mode #0.");
903
dispdata->mode = dispdata->connector->modes[0];
904
905
906
}
/* Setup the single display that's available */
907
908
909
910
911
912
913
914
display.desktop_mode.w = dispdata->mode.hdisplay;
display.desktop_mode.h = dispdata->mode.vdisplay;
display.desktop_mode.refresh_rate = dispdata->mode.vrefresh;
#if 1
display.desktop_mode.format = SDL_PIXELFORMAT_ARGB8888;
#else
/* FIXME */
915
drmModeFB *fb = drmModeGetFB(viddata->drm_fd, dispdata->crtc->buffer_id);
916
917
918
display.desktop_mode.format = drmToSDLPixelFormat(fb->bpp, fb->depth);
drmModeFreeFB(fb);
#endif
919
920
/* DRM mode index for the desktop mode is needed to complete desktop mode init NOW,
921
922
923
so look for it in the DRM modes array.
This is needed because SetDisplayMode() uses the mode index, and some programs
change to fullscreen desktop video mode as they start. */
924
925
for (int i = 0; i < dispdata->connector->count_modes; i++) {
if (!SDL_memcmp(dispdata->connector->modes + i, &dispdata->crtc->mode, sizeof(drmModeModeInfo))) {
926
927
928
929
SDL_DisplayModeData *modedata = SDL_calloc(1, sizeof(SDL_DisplayModeData));
if (modedata) {
modedata->mode_index = i;
display.desktop_mode.driverdata = modedata;
930
931
932
}
}
}
933
934
935
display.current_mode = display.desktop_mode;
display.driverdata = dispdata;
936
937
SDL_AddVideoDisplay(&display);
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
/****************/
/* Atomic block */
/****************/
ret = KMSDRM_drmSetClientCap(viddata->drm_fd, DRM_CLIENT_CAP_ATOMIC, 1);
if (ret) {
ret = SDL_SetError("no atomic modesetting support.");
goto cleanup;
}
ret = KMSDRM_drmSetClientCap(viddata->drm_fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
if (ret) {
ret = SDL_SetError("no universal planes support.");
goto cleanup;
}
954
dispdata->plane_id = get_plane_id(_this, resources);
955
956
957
958
959
960
961
if (!dispdata->plane_id) {
ret = SDL_SetError("could not find a suitable plane.");
goto cleanup;
}
dispdata->plane = KMSDRM_drmModeGetPlane(viddata->drm_fd, dispdata->plane_id);
962
963
964
965
/* Use this if you ever need to see info on all available planes. */
#if 0
get_planes_info(_this);
#endif
966
967
968
969
970
971
972
973
974
975
/* We only do single plane to single crtc to single connector, no
* fancy multi-monitor or multi-plane stuff. So just grab the
* plane/crtc/connector property info for one of each:
*/
/* Get PLANE properties */
dispdata->plane_props = KMSDRM_drmModeObjectGetProperties(viddata->drm_fd,
dispdata->plane_id, DRM_MODE_OBJECT_PLANE);
976
dispdata->plane_props_info = SDL_calloc(dispdata->plane_props->count_props,
977
978
979
980
sizeof(dispdata->plane_props_info));
for (int i = 0; i < dispdata->plane_props->count_props; i++) {
dispdata->plane_props_info[i] = KMSDRM_drmModeGetProperty(viddata->drm_fd,
981
dispdata->plane_props->props[i]);
982
983
984
985
986
987
}
/* Get CRTC properties */
dispdata->crtc_props = KMSDRM_drmModeObjectGetProperties(viddata->drm_fd,
dispdata->crtc_id, DRM_MODE_OBJECT_CRTC);
988
dispdata->crtc_props_info = SDL_calloc(dispdata->crtc_props->count_props,
989
990
991
992
993
994
995
996
997
998
999
sizeof(dispdata->crtc_props_info));
for (int i = 0; i < dispdata->crtc_props->count_props; i++) {
dispdata->crtc_props_info[i] = KMSDRM_drmModeGetProperty(viddata->drm_fd,
dispdata->crtc_props->props[i]);
}
/* Get connector properties */
dispdata->connector_props = KMSDRM_drmModeObjectGetProperties(viddata->drm_fd,
dispdata->connector_id, DRM_MODE_OBJECT_CONNECTOR);
1000
dispdata->connector_props_info = SDL_calloc(dispdata->connector_props->count_props,