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ecore - x vsync - whitelies only intel drm driver 

do a version/driver name check and only support intel (as it's the one
i KNOW works - except if you turn on EXA).
This commit is contained in:
Carsten Haitzler 2014-09-04 18:12:15 +09:00
parent fdc8e455e4
commit 61efcf37f8
1 changed files with 68 additions and 0 deletions
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68
src/lib/ecore_x/xlib/ecore_x_vsync.c
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@ -96,11 +96,29 @@ typedef struct _drmEventContext
void *user_data);
} drmEventContext;
typedef struct _drmVersion
{
int version_major;
int version_minor;
// int version_patchlevel;
size_t name_len;
// WARNING! this does NOT match the system drm.h headers because
// literally drm.h is wrong. the below is correct. drm hapily
// broke its ABI at some point.
char *name;
size_t date_len;
char *date;
size_t desc_len;
char *desc;
} drmVersion;
static int (*sym_drmClose)(int fd) = NULL;
static int (*sym_drmWaitVBlank)(int fd,
drmVBlank *vbl) = NULL;
static int (*sym_drmHandleEvent)(int fd,
drmEventContext *evctx) = NULL;
static void *(*sym_drmGetVersion)(int fd) = NULL;
static void (*sym_drmFreeVersion)(void *drmver) = NULL;
static int drm_fd = -1;
static volatile int drm_event_is_busy = 0;
static int drm_animators_interval = 1;
@ -332,6 +350,8 @@ _drm_link(void)
SYM(drm_lib, drmClose);
SYM(drm_lib, drmWaitVBlank);
SYM(drm_lib, drmHandleEvent);
SYM(drm_lib, drmGetVersion);
SYM(drm_lib, drmFreeVersion);
if (fail)
{
dlclose(drm_lib);
@ -349,6 +369,7 @@ _drm_init(void)
{
struct stat st;
char buf[512];
Eina_Bool ok = EINA_FALSE;
// vboxvideo 4.3.14 is crashing when calls drmWaitVBlank()
// https://www.virtualbox.org/ticket/13265
@ -404,6 +425,53 @@ _drm_init(void)
if (stat(buf, &st) != 0) return 0;
drm_fd = open(buf, O_RDWR);
if (drm_fd < 0) return 0;
if (!getenv("ECORE_VSYNC_DRM_ALL"))
{
drmVersion *drmver;
drmver = sym_drmGetVersion(drm_fd);
if (!drmver)
{
close(drm_fd);
return 0;
}
// sanity check the drm version structure due to public versions
// not matching the real memory layout, check drm version
// is recent (1.6+) and name and sec ptrs exist AND their lengths are
// not garbage (within a sensible range)
if (getenv("ECORE_VSYNC_DRM_VERSION_DEBUG"))
{
fprintf(stderr,
"DRM Version: %i.%i\n"
"Name: '%s'\n"
"Date: '%s'\n"
"Desc: '%s'\n",
drmver->version_major, drmver->version_minor,
drmver->name, drmver->date, drmver->desc);
}
if ((drmver->version_major >= 1) &&
(drmver->version_minor >= 6) &&
(drmver->name) &&
(drmver->desc) &&
(drmver->desc_len > 0) &&
(drmver->desc_len < 200))
{
// whitelist of known-to-work drivers
if ((!strcmp(drmver->name, "i915")) &&
(strstr(drmver->desc, "Intel Graphics")))
{
ok = EINA_TRUE;
}
}
if (!ok)
{
sym_drmFreeVersion(drmver);
close(drm_fd);
return 0;
}
}
memset(&drm_evctx, 0, sizeof(drm_evctx));
drm_evctx.version = DRM_EVENT_CONTEXT_VERSION;
drm_evctx.vblank_handler = _drm_vblank_handler;