On pe, 2015-04-10 at 13:12 +0100, Nick Hoath wrote:
> Signed-off-by: Nick Hoath <nicholas.hoath@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 1 +
> drivers/gpu/drm/i915/intel_ringbuffer.c | 7 +++++++
> 2 files changed, 8 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 91eef06..d34432b 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -6318,6 +6318,7 @@ enum skl_disp_power_wells {
> #define GEN7_HALF_SLICE_CHICKEN1_GT2 0xf100
> #define GEN7_MAX_PS_THREAD_DEP (8<<12)
> #define GEN7_SINGLE_SUBSCAN_DISPATCH_ENABLE (1<<10)
> +#define GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE (1<<4)
> #define GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE (1<<3)
>
> #define GEN9_HALF_SLICE_CHICKEN5 0xe188
> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
> index 5aad253..eebee73 100644
> --- a/drivers/gpu/drm/i915/intel_ringbuffer.c
> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
> @@ -1047,6 +1047,13 @@ static int bxt_init_workarounds(struct intel_engine_cs *ring)
> WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
> STALL_DOP_GATING_DISABLE);
>
> + /* WaDisableSbeCacheDispatchPortSharing:bxt */
> + if (INTEL_REVID(dev) <= BXT_REVID_B0) {
> + WA_SET_BIT_MASKED(
> + GEN7_HALF_SLICE_CHICKEN1,
> + GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE);
> + }
> +
This looks ok, but according to the WA DB it should also be added for
SKL (<=F0) in gen9_init_workarounds.
> return 0;
> }
>
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