[Mesa-dev] [PATCH 2/2] i965: Queue the buffer with a sync fence for Android OS v4.2

Marathe, Yogesh yogesh.marathe at intel.com
Mon Jul 31 16:58:24 UTC 2017


Rafael,  Tomasz,

> -----Original Message-----
> From: mesa-dev [mailto:mesa-dev-bounces at lists.freedesktop.org] On Behalf
> Of Rafael Antognolli
> Sent: Tuesday, July 25, 2017 9:39 PM
> To: Wu, Zhongmin <zhongmin.wu at intel.com>
> Cc: Gao, Shuo <shuo.gao at intel.com>; Liu, Zhiquan <zhiquan.liu at intel.com>;
> Daniel Stone <daniels at collabora.com>; emil.l.velikov at gmail.com; Eric
> Engestrom <eric at engestrom.ch>; Marathe, Yogesh
> <yogesh.marathe at intel.com>; tfiga at chromium.org; Kondapally, Kalyan
> <kalyan.kondapally at intel.com>; mesa-dev at lists.freedesktop.org; Varad
> Gautam <varad.gautam at collabora.com>
> Subject: Re: [Mesa-dev] [PATCH 2/2] i965: Queue the buffer with a sync fence
> for Android OS v4.2
> 
> On Tue, Jul 25, 2017 at 10:07:23AM +0800, Zhongmin Wu wrote:
> > Before we queued the buffer with a invalid fence (-1), it will make
> > some benchmarks failed to test such as flatland.
> >
> > Now we get the out fence during the flushing buffer and then pass it
> > to SurfaceFlinger in eglSwapbuffer function.
> >
> > v2: a) Also implement the fence in cancelBuffer.
> >     b) The last sync fence is stored in drawable object
> >            rather than brw context.
> >     c) format clear.
> >
> > v3: a) Save the last fence fd in DRI Context object.
> >     b) Return the last fence if the batch buffer is empty and
> >        nothing to be flushed when _intel_batchbuffer_flush_fence
> >     c) Add the new interface in vbtl to set the retrieve fence
> >
> > v3.1 a) close fd in the new vbtl interface on none Android platform
> >
> > v4: a) The last fence is saved in brw context.
> >     b) The retrieve fd is for all the platform but not just Android
> >     c) Add a uniform dri2 interface to initialize the surface.
> >
> > v4.1: a) make some changes of variable name.
> >       b) the patch is breaked into two patches.
> >
> > v4.2: a) Add a deinit interface for surface to clear the out fence
> 
> Hi Zhongmin,
> 
> The patch is indeed looking better. I agree with Tomasz, it would be good to
> have a way for the platform to inform whether it is interested in fences or not.
> What about some flag that you pass to dri2_surf_init? (I'm not sure that's the
> best place, though).
> 

I would like to take it forward from here for remaining review comments, Zhongmin agrees.

I added 'enable_out_fence' bool to dri2_surf_init() as a parameter and all platforms except
android pass this as false. Based on  'enable_out_fence'  stored with surface,
'dri2_surf_get/update_fence_fd()' has a check before it calls create_fence_fd(). Is this the
right expectation here?

Please let me know if 'enable_out_fence' can be changed for a better name. I've already
implemented other review other comments Rafael mentioned and will include them
in v4.3 along with this.

> Please see other comments below.
> 
> > Change-Id: Ided54d2e193cde73a6f0feb36ac1c0056e4958f2
> > Signed-off-by: Zhongmin Wu <zhongmin.wu at intel.com>
> > ---
> >  src/egl/drivers/dri2/egl_dri2.c             |   51 +++++++++++++++++++++++++++
> >  src/egl/drivers/dri2/egl_dri2.h             |    8 +++++
> >  src/egl/drivers/dri2/platform_android.c     |   12 ++++---
> >  src/egl/drivers/dri2/platform_drm.c         |    3 +-
> >  src/egl/drivers/dri2/platform_surfaceless.c |    3 +-
> >  src/egl/drivers/dri2/platform_wayland.c     |    3 +-
> >  src/egl/drivers/dri2/platform_x11.c         |    3 +-
> >  src/egl/drivers/dri2/platform_x11_dri3.c    |    3 +-
> >  8 files changed, 77 insertions(+), 9 deletions(-)
> >
> > diff --git a/src/egl/drivers/dri2/egl_dri2.c
> > b/src/egl/drivers/dri2/egl_dri2.c index 020a0bc..ffd3a8a 100644
> > --- a/src/egl/drivers/dri2/egl_dri2.c
> > +++ b/src/egl/drivers/dri2/egl_dri2.c
> > @@ -1307,6 +1307,32 @@ dri2_destroy_context(_EGLDriver *drv,
> _EGLDisplay *disp, _EGLContext *ctx)
> >     return EGL_TRUE;
> >  }
> >
> > +EGLBoolean
> > +dri2_surf_init(_EGLSurface *surf, _EGLDisplay *dpy, EGLint type,
> > +        _EGLConfig *conf, const EGLint *attrib_list) {
> > +   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
> > +   dri2_surf->out_fence_fd = -1;
> > +   return _eglInitSurface(surf, dpy, type, conf, attrib_list); }
> > +
> > +static void
> > +dri2_surface_set_out_fence( _EGLSurface *surf, int fence_fd) {
> > +   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
> > +   if (dri2_surf->out_fence_fd >=0)
> > +      close(dri2_surf->out_fence_fd);
> > +
> > +   dri2_surf->out_fence_fd = fence_fd; }
> > +
> > +void
> > +dri2_surf_deinit(_EGLSurface *surf)
> > +{
> > +   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
> > +   dri2_surface_set_out_fence(surf, -1); }
> > +
> >  static EGLBoolean
> >  dri2_destroy_surface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface
> > *surf)  { @@ -1318,6 +1344,22 @@ dri2_destroy_surface(_EGLDriver *drv,
> > _EGLDisplay *dpy, _EGLSurface *surf)
> >     return dri2_dpy->vtbl->destroy_surface(drv, dpy, surf);  }
> >
> > +static void
> > +dri2_surf_get_fence_fd(_EGLContext *ctx,
> 
> Maybe it's just me but every time I read this code I get confused by the name of
> this function, since it says "get_fence_fd" but doesn't really return anything.
> How about dri2_surf_update_fence_fd?
> 
> > +                       _EGLDisplay *dpy, _EGLSurface *surf) {
> > +   struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
> > +   int fence_fd = -1;
> > +   __DRIcontext *dri_ctx = dri2_egl_context(ctx)->dri_context;
> > +   void * fence = dri2_dpy->fence->create_fence_fd(dri_ctx, -1);
> 
> Before calling any of the dri2 fence extension, shouldn't we check whether it is
> available? I think you had these checks in earlier versions of this patch, but
> maybe it got lost along the way.
> 
> > +   if (fence) {
> > +      fence_fd = dri2_dpy->fence->get_fence_fd(dri2_dpy->dri_screen,
> > +                                               fence);
> > +      dri2_dpy->fence->destroy_fence(dri2_dpy->dri_screen, fence);
> > +   }
> > +   dri2_surface_set_out_fence(surf, fence_fd); }
> > +
> >  /**
> >   * Called via eglMakeCurrent(), drv->API.MakeCurrent().
> >   */
> > @@ -1352,8 +1394,11 @@ dri2_make_current(_EGLDriver *drv, _EGLDisplay
> *disp, _EGLSurface *dsurf,
> >     rdraw = (rsurf) ? dri2_dpy->vtbl->get_dri_drawable(rsurf) : NULL;
> >     cctx = (dri2_ctx) ? dri2_ctx->dri_context : NULL;
> >
> > +   int fence_fd = -1;
> >     if (old_ctx) {
> >        __DRIcontext *old_cctx =
> > dri2_egl_context(old_ctx)->dri_context;
> > +      if (old_dsurf)
> > +         dri2_surf_get_fence_fd(old_ctx, disp, old_dsurf);
> >        dri2_dpy->core->unbindContext(old_cctx);
> >     }
> >
> > @@ -1490,6 +1535,9 @@ static EGLBoolean  dri2_swap_buffers(_EGLDriver
> > *drv, _EGLDisplay *dpy, _EGLSurface *surf)  {
> >     struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
> > +   _EGLContext *ctx = _eglGetCurrentContext();
> > +   if (ctx && surf)
> > +      dri2_surf_get_fence_fd(ctx, dpy, surf);
> >     return dri2_dpy->vtbl->swap_buffers(drv, dpy, surf);  }
> >
> > @@ -1499,6 +1547,9 @@ dri2_swap_buffers_with_damage(_EGLDriver *drv,
> _EGLDisplay *dpy,
> >                                const EGLint *rects, EGLint n_rects)  {
> >     struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
> > +   _EGLContext *ctx = _eglGetCurrentContext();
> > +   if (ctx && surf)
> > +      dri2_surf_get_fence_fd(ctx, dpy, surf);
> >     return dri2_dpy->vtbl->swap_buffers_with_damage(drv, dpy, surf,
> >                                                     rects, n_rects);
> > } diff --git a/src/egl/drivers/dri2/egl_dri2.h
> > b/src/egl/drivers/dri2/egl_dri2.h index bbba7c0..4ea3adb 100644
> > --- a/src/egl/drivers/dri2/egl_dri2.h
> > +++ b/src/egl/drivers/dri2/egl_dri2.h
> > @@ -320,6 +320,7 @@ struct dri2_egl_surface
> >        __DRIimage           *front;
> >        unsigned int         visual;
> >  #endif
> > +   int out_fence_fd;
> >  };
> >
> >  struct dri2_egl_config
> > @@ -446,4 +447,11 @@ dri2_set_WL_bind_wayland_display(_EGLDriver *drv,
> > _EGLDisplay *disp)  void  dri2_display_destroy(_EGLDisplay *disp);
> >
> > +EGLBoolean
> > +dri2_surf_init(_EGLSurface *surf, _EGLDisplay *dpy, EGLint type,
> > +        _EGLConfig *conf, const EGLint *attrib_list);
> > +
> > +void
> > +dri2_surf_deinit(_EGLSurface *surf);
> > +
> >  #endif /* EGL_DRI2_INCLUDED */
> > diff --git a/src/egl/drivers/dri2/platform_android.c
> > b/src/egl/drivers/dri2/platform_android.c
> > index cc2e4a6..4112a0a 100644
> > --- a/src/egl/drivers/dri2/platform_android.c
> > +++ b/src/egl/drivers/dri2/platform_android.c
> > @@ -305,7 +305,8 @@ droid_window_enqueue_buffer(_EGLDisplay *disp,
> struct dri2_egl_surface *dri2_sur
> >      *    is passed to queueBuffer, and the ANativeWindow implementation
> >      *    is responsible for closing it.
> >      */
> > -   int fence_fd = -1;
> > +   int fence_fd = dri2_surf->out_fence_fd;
> > +   dri2_surf->out_fence_fd = -1;
> >     dri2_surf->window->queueBuffer(dri2_surf->window, dri2_surf->buffer,
> >                                    fence_fd);
> >
> > @@ -327,8 +328,10 @@ static void
> >  droid_window_cancel_buffer(struct dri2_egl_surface *dri2_surf)  {
> >     int ret;
> > -
> > -   ret = dri2_surf->window->cancelBuffer(dri2_surf->window, dri2_surf-
> >buffer, -1);
> > +   int fence_fd = dri2_surf->out_fence_fd;
> > +   dri2_surf->out_fence_fd = -1;
> > +   ret = dri2_surf->window->cancelBuffer(dri2_surf->window,
> > +                                         dri2_surf->buffer,
> > + fence_fd);
> >     if (ret < 0) {
> >        _eglLog(_EGL_WARNING, "ANativeWindow::cancelBuffer failed");
> >        dri2_surf->base.Lost = EGL_TRUE; @@ -388,7 +391,7 @@
> > droid_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
> >        return NULL;
> >     }
> >
> > -   if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
> > +   if (!dri2_surf_init(&dri2_surf->base, disp, type, conf,
> > + attrib_list))
> >        goto cleanup_surface;
> >
> >     if (type == EGL_WINDOW_BIT) {
> > @@ -488,6 +491,7 @@ droid_destroy_surface(_EGLDriver *drv, _EGLDisplay
> > *disp, _EGLSurface *surf)
> >
> >     dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
> >
> > +   dri2_surf_deinit(surf);
> >     free(dri2_surf);
> >
> >     return EGL_TRUE;
> > diff --git a/src/egl/drivers/dri2/platform_drm.c
> > b/src/egl/drivers/dri2/platform_drm.c
> > index 8b0562c..0af93d1 100644
> > --- a/src/egl/drivers/dri2/platform_drm.c
> > +++ b/src/egl/drivers/dri2/platform_drm.c
> > @@ -111,7 +111,7 @@ dri2_drm_create_surface(_EGLDriver *drv,
> _EGLDisplay *disp, EGLint type,
> >        return NULL;
> >     }
> >
> > -   if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
> > +   if (!dri2_surf_init(&dri2_surf->base, disp, type, conf,
> > + attrib_list))
> >        goto cleanup_surf;
> >
> >     switch (type) {
> > @@ -204,6 +204,7 @@ dri2_drm_destroy_surface(_EGLDriver *drv,
> _EGLDisplay *disp, _EGLSurface *surf)
> >                                         dri2_surf->dri_buffers[i]);
> >     }
> >
> > +   dri2_surf_deinit(surf);
> >     free(surf);
> >
> >     return EGL_TRUE;
> > diff --git a/src/egl/drivers/dri2/platform_surfaceless.c
> > b/src/egl/drivers/dri2/platform_surfaceless.c
> > index 0eb3fb7..46c95c4 100644
> > --- a/src/egl/drivers/dri2/platform_surfaceless.c
> > +++ b/src/egl/drivers/dri2/platform_surfaceless.c
> > @@ -124,7 +124,7 @@ dri2_surfaceless_create_surface(_EGLDriver *drv,
> _EGLDisplay *disp, EGLint type,
> >        return NULL;
> >     }
> >
> > -   if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
> > +   if (!dri2_surf_init(&dri2_surf->base, disp, type, conf,
> > + attrib_list))
> >        goto cleanup_surface;
> >
> >     config = dri2_get_dri_config(dri2_conf, type, @@ -165,6 +165,7 @@
> > surfaceless_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp,
> > _EGLSurface *sur
> >
> >     dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
> >
> > +   dri2_surf_deinit(surf);
> >     free(dri2_surf);
> >     return EGL_TRUE;
> >  }
> > diff --git a/src/egl/drivers/dri2/platform_wayland.c
> > b/src/egl/drivers/dri2/platform_wayland.c
> > index f746f0b..2122c5d 100644
> > --- a/src/egl/drivers/dri2/platform_wayland.c
> > +++ b/src/egl/drivers/dri2/platform_wayland.c
> > @@ -121,7 +121,7 @@ dri2_wl_create_window_surface(_EGLDriver *drv,
> _EGLDisplay *disp,
> >        return NULL;
> >     }
> >
> > -   if (!_eglInitSurface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf,
> attrib_list))
> > +   if (!dri2_surf_init(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf,
> > + attrib_list))
> >        goto cleanup_surf;
> >
> >     if (dri2_dpy->wl_drm) {
> > @@ -286,6 +286,7 @@ dri2_wl_destroy_surface(_EGLDriver *drv,
> _EGLDisplay *disp, _EGLSurface *surf)
> >     wl_proxy_wrapper_destroy(dri2_surf->wl_dpy_wrapper);
> >     wl_event_queue_destroy(dri2_surf->wl_queue);
> >
> > +   dri2_surf_deinit(surf);
> >     free(surf);
> >
> >     return EGL_TRUE;
> > diff --git a/src/egl/drivers/dri2/platform_x11.c
> > b/src/egl/drivers/dri2/platform_x11.c
> > index 74d3a16..37f47cb 100644
> > --- a/src/egl/drivers/dri2/platform_x11.c
> > +++ b/src/egl/drivers/dri2/platform_x11.c
> > @@ -222,7 +222,7 @@ dri2_x11_create_surface(_EGLDriver *drv,
> _EGLDisplay *disp, EGLint type,
> >        return NULL;
> >     }
> >
> > -   if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
> > +   if (!dri2_surf_init(&dri2_surf->base, disp, type, conf,
> > + attrib_list))
> >        goto cleanup_surf;
> >
> >     dri2_surf->region = XCB_NONE;
> > @@ -390,6 +390,7 @@ dri2_x11_destroy_surface(_EGLDriver *drv,
> _EGLDisplay *disp, _EGLSurface *surf)
> >     if (surf->Type == EGL_PBUFFER_BIT)
> >        xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
> >
> > +   dri2_surf_deinit(surf);
> >     free(surf);
> >
> >     return EGL_TRUE;
> > diff --git a/src/egl/drivers/dri2/platform_x11_dri3.c
> > b/src/egl/drivers/dri2/platform_x11_dri3.c
> > index 3148f49..5f6f7e5 100644
> > --- a/src/egl/drivers/dri2/platform_x11_dri3.c
> > +++ b/src/egl/drivers/dri2/platform_x11_dri3.c
> > @@ -145,6 +145,7 @@ dri3_destroy_surface(_EGLDriver *drv, _EGLDisplay
> > *disp, _EGLSurface *surf)
> >
> >     loader_dri3_drawable_fini(&dri3_surf->loader_drawable);
> >
> > +   dri2_surf_deinit(surf);
> >     free(surf);
> >
> >     return EGL_TRUE;
> > @@ -183,7 +184,7 @@ dri3_create_surface(_EGLDriver *drv, _EGLDisplay
> *disp, EGLint type,
> >        return NULL;
> >     }
> >
> > -   if (!_eglInitSurface(&dri3_surf->base, disp, type, conf, attrib_list))
> > +   if (!dri2_surf_init(&dri3_surf->base, disp, type, conf,
> > + attrib_list))
> >        goto cleanup_surf;
> >
> >     if (type == EGL_PBUFFER_BIT) {
> > --
> > 1.7.9.5
> >
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