[Intel-gfx] [PATCH 2/3] drm/i915: Set INSTPM_FORCE_ORDERING via LRI on gen8, drop it on gen9+
Damien Lespiau
damien.lespiau at intel.com
Wed Jun 3 03:25:15 PDT 2015
On Tue, Jun 02, 2015 at 03:37:36PM +0300, ville.syrjala at linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> INSTPM is saved in the logical context so we should initialize it using
> LRIs on gen8. It actually defaults to 1 starting from HSW, but let's
> keep the write around anyway.
>
> Also drop the INSTPM_FORCE_ORDERING setup entirely on gen9+ since it's
> now a reserved bit.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau at intel.com>
--
Damien
> ---
> drivers/gpu/drm/i915/intel_ringbuffer.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
> index edd47ba..06f4b22 100644
> --- a/drivers/gpu/drm/i915/intel_ringbuffer.c
> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
> @@ -800,6 +800,8 @@ static int bdw_init_workarounds(struct intel_engine_cs *ring)
> struct drm_device *dev = ring->dev;
> struct drm_i915_private *dev_priv = dev->dev_private;
>
> + WA_SET_BIT_MASKED(INSTPM, INSTPM_FORCE_ORDERING);
> +
> /* WaDisablePartialInstShootdown:bdw */
> /* WaDisableThreadStallDopClockGating:bdw (pre-production) */
> WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
> @@ -861,6 +863,8 @@ static int chv_init_workarounds(struct intel_engine_cs *ring)
> struct drm_device *dev = ring->dev;
> struct drm_i915_private *dev_priv = dev->dev_private;
>
> + WA_SET_BIT_MASKED(INSTPM, INSTPM_FORCE_ORDERING);
> +
> /* WaDisablePartialInstShootdown:chv */
> /* WaDisableThreadStallDopClockGating:chv */
> WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
> @@ -1132,7 +1136,7 @@ static int init_render_ring(struct intel_engine_cs *ring)
> _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB));
> }
>
> - if (INTEL_INFO(dev)->gen >= 6)
> + if (INTEL_INFO(dev)->gen >= 6 && INTEL_INFO(dev)->gen < 8)
> I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_FORCE_ORDERING));
>
> if (HAS_L3_DPF(dev))
> --
> 2.3.6
>
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