<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Skylake GPU HANG while gstreamer H264 vaapi encoding from MJPEG vaapi decode on drm-tip" href="https://bugs.freedesktop.org/show_bug.cgi?id=110394#c39">Comment # 39</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Skylake GPU HANG while gstreamer H264 vaapi encoding from MJPEG vaapi decode on drm-tip" href="https://bugs.freedesktop.org/show_bug.cgi?id=110394">bug 110394</a> from <a class="email" href="mailto:andy.nicholas@shield.ai" title="Andy Nicholas <andy.nicholas@shield.ai>"> Andy Nicholas</a> <pre>(In reply to Chris Wilson from <a href="show_bug.cgi?id=110394#c25">comment #25</a>) > You can try something silly like > > diff --git a/drivers/gpu/drm/i915/intel_lrc.c > b/drivers/gpu/drm/i915/intel_lrc.c > index 4e0a351bfbca..e5feb0f5a5fe 100644 > --- a/drivers/gpu/drm/i915/intel_lrc.c > +++ b/drivers/gpu/drm/i915/intel_lrc.c > @@ -2115,10 +2115,16 @@ static int gen9_emit_bb_start(struct i915_request > *rq, > { > u32 *cs; > > - cs = intel_ring_begin(rq, 6); > + cs = intel_ring_begin(rq, 12); > if (IS_ERR(cs)) > return PTR_ERR(cs); > > + *cs++ = MI_LOAD_REGISTER_IMM(1); > + *cs++ = i915_mmio_reg_offset(GEN6_RC_CONTROL); > + *cs++ = GEN6_RC_CTL_HW_ENABLE | > + GEN6_RC_CTL_RC6_ENABLE | > + GEN6_RC_CTL_EI_MODE(1); > + > *cs++ = MI_ARB_ON_OFF | MI_ARB_ENABLE; > > *cs++ = MI_BATCH_BUFFER_START_GEN8 | > @@ -2129,6 +2135,10 @@ static int gen9_emit_bb_start(struct i915_request *rq, > *cs++ = MI_ARB_ON_OFF | MI_ARB_DISABLE; > *cs++ = MI_NOOP; > > + *cs++ = MI_LOAD_REGISTER_IMM(1); > + *cs++ = i915_mmio_reg_offset(GEN6_RC_CONTROL); > + *cs++ = 0; > + > intel_ring_advance(rq, cs); > > return 0; > > to see if it is just an rc6 event on idling that is the culprit, while > keeping rc6 active for the encoder. gen9_emit_bb_start() does not exist in my drm-tip sources from 4 weeks ago (March 22). There is a gen8_emit_bb_start(), but no "gen9" or anything which seems similar. andy@kbuild:/build/kernel/drm-tip/drm-tip/drivers/gpu/drm/i915$ git log commit 00cb3798a5d008c3f824fe7c89c663dba66155c3 (HEAD -> drm-tip, origin/drm-tip, origin/HEAD) Author: Rodrigo Vivi <<a href="mailto:rodrigo.vivi@intel.com">rodrigo.vivi@intel.com</a>> Date: Fri Mar 22 12:52:43 2019 -0700 drm-tip: 2019y-03m-22d-19h-51m-23s UTC integration manifest</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>