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Remove old fallback for vblank wait via manual drm ioctl

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This workaround code has just been incrementally carried forward since
Cogl was integrated with Clutter but really we have no idea when this
code path was ever tested. Since the work around is from before the time
of the current Cogl developers we don't know anything about the
circumstances which led to this extreme workaround instead of pushing to
fix a driver.

It seems pretty likely we can push to fix any drm based drivers so
we're removing the workaround.

https://bugzilla.gnome.org/show_bug.cgi?id=667009

Reviewed-by: Neil Roberts <neil@linux.intel.com>
This commit is contained in:
Robert Bragg 2012-01-05 20:21:51 +00:00
parent 20f2d51392
commit 3bc70687ac
1 changed files with 0 additions and 50 deletions
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50
cogl/winsys/cogl-winsys-glx.c
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@ -61,12 +61,6 @@
#include <GL/glx.h>
#include <X11/Xlib.h>
#ifdef HAVE_DRM
#include <drm.h>
#include <sys/ioctl.h>
#include <errno.h>
#endif
#define COGL_ONSCREEN_X11_EVENT_MASK StructureNotifyMask
#define MAX_GLX_CONFIG_ATTRIBS 30
@ -432,20 +426,6 @@ update_winsys_features (CoglContext *context, GError **error)
COGL_WINSYS_FEATURE_VBLANK_WAIT,
TRUE);
#ifdef HAVE_DRM
/* drm is really an extreme fallback -rumoured to work with Via
* chipsets... */
if (!glx_renderer->pf_glXWaitVideoSync)
{
if (glx_renderer->dri_fd < 0)
glx_renderer->dri_fd = open("/dev/dri/card0", O_RDWR);
if (glx_renderer->dri_fd >= 0)
COGL_FLAGS_SET (context->winsys_features,
COGL_WINSYS_FEATURE_VBLANK_WAIT,
TRUE);
}
#endif
if (glx_renderer->pf_glXCopySubBuffer || context->glBlitFramebuffer)
COGL_FLAGS_SET (context->winsys_features,
COGL_WINSYS_FEATURE_SWAP_REGION, TRUE);
@ -1097,24 +1077,6 @@ _cogl_winsys_onscreen_bind (CoglOnscreen *onscreen)
glx_context->current_drawable = drawable;
}
#ifdef HAVE_DRM
static int
drm_wait_vblank (int fd, drm_wait_vblank_t *vbl)
{
int ret, rc;
do
{
ret = ioctl (fd, DRM_IOCTL_WAIT_VBLANK, vbl);
vbl->request.type &= ~_DRM_VBLANK_RELATIVE;
rc = errno;
}
while (ret && rc == EINTR);
return rc;
}
#endif /* HAVE_DRM */
static void
_cogl_winsys_wait_for_vblank (void)
{
@ -1133,18 +1095,6 @@ _cogl_winsys_wait_for_vblank (void)
(current_count + 1) % 2,
&current_count);
}
#ifdef HAVE_DRM
else
{
drm_wait_vblank_t blank;
COGL_NOTE (WINSYS, "Waiting for vblank (drm)");
blank.request.type = _DRM_VBLANK_RELATIVE;
blank.request.sequence = 1;
blank.request.signal = 0;
drm_wait_vblank (glx_renderer->dri_fd, &blank);
}
#endif /* HAVE_DRM */
}
static guint32