[Intel-gfx] [PATCH 10/28] drm/i915: Implement WaIncreaseL3CreditsForVLVB0:vlv

[Rodrigo Vivi]

On Wed, Jan 22, 2014 at 5:32 PM,  <ville.syrjala at linux.intel.com> wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/i915_reg.h | 3 +++
>  drivers/gpu/drm/i915/intel_pm.c | 6 ++++++
>  2 files changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 242f540..c3039e1 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -4126,6 +4126,9 @@
>  #define COMMON_SLICE_CHICKEN2                  0x7014
>  # define GEN8_CSC2_SBE_VUE_CACHE_CONSERVATIVE  (1<<0)
>
> +#define GEN7_L3SQCREG1                         0xB010
> +#define  VLV_B0_WA_L3SQCREG1_VALUE             0x00D30000

where did you get this value?
All I see on wa_database was "L3Sqc Register will be having a
different value from VLVB0."
so I wonder if I'm looking to a different and wrong place.
please point me to the correct one

> +
>  #define GEN7_L3CNTLREG1                                0xB01C
>  #define  GEN7_WA_FOR_GEN7_L3_CONTROL                   0x3C4FFF8C
>  #define  GEN7_L3AGDIS                          (1<<19)
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 6781845..4a1f849 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -4992,6 +4992,12 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
>                    _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
>
>         /*
> +        * WaIncreaseL3CreditsForVLVB0:vlv
> +        * This is the hardware default actually.
> +        */
> +       I915_WRITE(GEN7_L3SQCREG1, VLV_B0_WA_L3SQCREG1_VALUE);
> +
> +       /*
>          * WaDisableVLVClockGating_VBIIssue:vlv
>          * Disable clock gating on th GCFG unit to prevent a delay
>          * in the reporting of vblank events.
> --
> 1.8.3.2
>
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-- 
Rodrigo Vivi
Blog: http://blog.vivi.eng.br