On Fri, 26 Sep 2014, Mika Kuoppala <mika.kuopp...@linux.intel.com> wrote: > Rodrigo Vivi <rodrigo.v...@intel.com> writes: > >> This helps when including or removing cs workarounds. >> Signed-off-by: Rodrigo Vivi <rodrigo.v...@intel.com> >> --- >> drivers/gpu/drm/i915/intel_ringbuffer.c | 16 ++++++++++++---- >> 1 file changed, 12 insertions(+), 4 deletions(-) >> >> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c >> b/drivers/gpu/drm/i915/intel_ringbuffer.c >> index 7c3d17a..39fbea6 100644 >> --- a/drivers/gpu/drm/i915/intel_ringbuffer.c >> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c >> @@ -694,6 +694,7 @@ static int bdw_init_workarounds(struct intel_engine_cs >> *ring) >> int ret; >> struct drm_device *dev = ring->dev; >> struct drm_i915_private *dev_priv = dev->dev_private; >> + int wa_amount; >> >> /* >> * workarounds applied in this fn are part of register state context, >> @@ -704,10 +705,11 @@ static int bdw_init_workarounds(struct intel_engine_cs >> *ring) >> memset(dev_priv->intel_wa_regs, 0, sizeof(dev_priv->intel_wa_regs)); >> >> /* >> - * update the number of dwords required based on the >> - * actual number of workarounds applied >> + * update the number of workarounds when adding or removing was >> + * in order the have propper dwords >> */ >> - ret = intel_ring_begin(ring, 24); >> + wa_amount = 8; >> + ret = intel_ring_begin(ring, 3 * wa_amount); >> if (ret) >> return ret; >> > > I have a bit mixed feelings with this patch as I have tripped > around here myself recently. > > I think we should just drop this patch and use: > ret = intel_ring_begin(ring, 3 * <amount>) on the subsequent > patches that modify the amount. > > This way the intel_ring_begin will always be the one that > shows in a diff. And raises alarm if it doesnt. We don't want > this to be too transparent and looking too easy for the next reader. > As the reviewer is the only and last line of defense ensuring > symmetry between intel_ring_begin and amount of emits.
Considering intel_ring_emit_wa() adds all the needed information to dev_priv->intel_wa_regs and dev_priv->num_wa_regs anyway, we could trivially split this into constructing dev_priv->intel_wa_regs first, and doing intel_ring_begin() and the intel_ring_emit()s next, and not worry about this again. BR, Jani. > > -Mika > >> @@ -775,6 +777,7 @@ static int chv_init_workarounds(struct intel_engine_cs >> *ring) >> int ret; >> struct drm_device *dev = ring->dev; >> struct drm_i915_private *dev_priv = dev->dev_private; >> + int wa_amount; >> >> /* >> * workarounds applied in this fn are part of register state context, >> @@ -784,7 +787,12 @@ static int chv_init_workarounds(struct intel_engine_cs >> *ring) >> dev_priv->num_wa_regs = 0; >> memset(dev_priv->intel_wa_regs, 0, sizeof(dev_priv->intel_wa_regs)); >> >> - ret = intel_ring_begin(ring, 12); >> + /* >> + * update the number of workarounds when adding or removing was >> + * in order the have propper dwords >> + */ >> + wa_amount = 4; >> + ret = intel_ring_begin(ring, 3 * wa_amount); >> if (ret) >> return ret; >> >> -- >> 1.9.3 >> >> _______________________________________________ >> Intel-gfx mailing list >> Intel-gfx@lists.freedesktop.org >> http://lists.freedesktop.org/mailman/listinfo/intel-gfx > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Jani Nikula, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
