[Intel-gfx] [PATCH 12/28] drm/i915: WaDisableRCCUnitClockGating isn't applicable to IVB

[Rodrigo Vivi]

For this and next one: According to wa_database this wa seems relevant
for all gt, right?

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>
>
> WaDisableRCCUnitClockGating is only relevant for SNB.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_pm.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index f40dd1b..1e1c1b1 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -4860,15 +4860,11 @@ static void ivybridge_init_clock_gating(struct drm_device *dev)
>          * Sanctuary and Tropics, and apparently anything else with
>          * alpha test or pixel discard.
>          *
> -        * According to the spec, bit 11 (RCCUNIT) must also be set,
> -        * but we didn't debug actual testcases to find it out.
> -        *
>          * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
>          * This implements the WaDisableRCZUnitClockGating:ivb workaround.
>          */
>         I915_WRITE(GEN6_UCGCTL2,
> -                  GEN6_RCZUNIT_CLOCK_GATE_DISABLE |
> -                  GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
> +                  GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
>
>         /* This is required by WaCatErrorRejectionIssue:ivb */
>         I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
> --
> 1.8.3.2
>
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-- 
Rodrigo Vivi
Blog: http://blog.vivi.eng.br