On Tue, 22 Apr 2014 20:19:41 +0300 Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx> wrote: > Hi, > > Here are patches to initialize first render context to a hopefully, > valid state. If pipeline/context is not initialized and we enter rc6 on bdw, > the render ring can hung on the first batch submitted. That is atleast > the hypothesis this work is based on. > > The states are stripped from rendercopy_genX's from i-g-t/lib and > the state generators are part of i-g-t also. The states are > propably overshoot from what can be consider the minimal valid > (null) state on the pipeline. I just initialized everything rendercopy > does and haven't really put effort on optimizing the state until > I get some test results that this indeed solves anything. > > The state generators can be found here but they are not needed for testing. > http://cgit.freedesktop.org/~miku/intel-gpu-tools/log/?h=null_state_gen > > Gen7 and Gen8 seems to atleast survive the boot but Gen6 is totally > untested. > > Here is the branch for testing: > http://cgit.freedesktop.org/~miku/drm-intel/log/?h=render_state > > I am interested to know if these patches make matters better/worse for those > who have issues with first batch hanging on bdw, but as always, any feedback > is greatly appreciated. I tested these on a system which has experienced the hang, and they worked fine for me. Tested-by: Kristen Carlson Accardi <kristen@xxxxxxxxxxxxxxx> > > Mika Kuoppala (3): > drm/i915: export vmap_batch from command parser > drm/i915: add render state initialization > drm/i915: add null render states for gen6, gen7 and gen8 > > drivers/gpu/drm/i915/Makefile | 1 + > drivers/gpu/drm/i915/i915_cmd_parser.c | 4 +- > drivers/gpu/drm/i915/i915_drv.h | 3 + > drivers/gpu/drm/i915/i915_gem_context.c | 7 + > drivers/gpu/drm/i915/i915_gem_render_state.c | 222 ++++++++++++ > drivers/gpu/drm/i915/intel_renderstate_gen6.h | 290 +++++++++++++++ > drivers/gpu/drm/i915/intel_renderstate_gen7.h | 254 +++++++++++++ > drivers/gpu/drm/i915/intel_renderstate_gen8.h | 480 +++++++++++++++++++++++++ > 8 files changed, 1259 insertions(+), 2 deletions(-) > create mode 100644 drivers/gpu/drm/i915/i915_gem_render_state.c > create mode 100644 drivers/gpu/drm/i915/intel_renderstate_gen6.h > create mode 100644 drivers/gpu/drm/i915/intel_renderstate_gen7.h > create mode 100644 drivers/gpu/drm/i915/intel_renderstate_gen8.h > _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
