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[KMS/DRM] Bugfix number #5535: Improve reliability, by wahil1976.

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This commit is contained in:
Manuel Alfayate Corchete 2021-02-09 00:57:25 +01:00
parent 2170c7bfde
commit 005e2c59a7
2 changed files with 28 additions and 1 deletions
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2
src/video/kmsdrm/SDL_kmsdrmsym.h
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@ -41,6 +41,8 @@ SDL_KMSDRM_SYM(void,drmModeFreeCrtc,(drmModeCrtcPtr ptr))
SDL_KMSDRM_SYM(void,drmModeFreeConnector,(drmModeConnectorPtr ptr))
SDL_KMSDRM_SYM(void,drmModeFreeEncoder,(drmModeEncoderPtr ptr))
SDL_KMSDRM_SYM(int,drmGetCap,(int fd, uint64_t capability, uint64_t *value))
SDL_KMSDRM_SYM(int,drmSetMaster,(int fd))
SDL_KMSDRM_SYM(int,drmAuthMagic,(int fd, drm_magic_t magic))
SDL_KMSDRM_SYM(drmModeResPtr,drmModeGetResources,(int fd))
SDL_KMSDRM_SYM(int,drmModeAddFB,(int fd, uint32_t width, uint32_t height, uint8_t depth,
uint8_t bpp, uint32_t pitch, uint32_t bo_handle,

27
src/video/kmsdrm/SDL_kmsdrmvideo.c
View File

@ -70,6 +70,7 @@ check_modestting(int devindex)
SDL_bool available = SDL_FALSE;
char device[512];
int drm_fd;
int i;
SDL_snprintf(device, sizeof (device), KMSDRM_DRI_DEVFMT, KMSDRM_DRI_PATH, devindex);
@ -89,7 +90,22 @@ check_modestting(int devindex)
&& resources->count_encoders > 0
&& resources->count_crtcs > 0)
{
available = SDL_TRUE;
available = SDL_FALSE;
for (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;
break;
}
KMSDRM_drmModeFreeConnector(conn);
}
}
KMSDRM_drmModeFreeResources(resources);
}
@ -751,6 +767,15 @@ KMSDRM_GBMInit (_THIS, SDL_DisplayData *dispdata)
/* Reopen the FD! */
viddata->drm_fd = open(viddata->devpath, O_RDWR | O_CLOEXEC);
/* Set the FD we just opened as current DRM master. */
KMSDRM_drmSetMaster(viddata->drm_fd);
/* Check if we are the current DRM master. */
if (KMSDRM_drmAuthMagic(viddata->drm_fd, 0) == -EACCES) {
ret = SDL_SetError("DRM device is claimed by another program as master.");
return ret;
}
/* Create the GBM device. */
viddata->gbm_dev = KMSDRM_gbm_create_device(viddata->drm_fd);
if (!viddata->gbm_dev) {