[Intel-gfx] [PATCH 23/25] DO NOT MERGE: drm/i915: resize the GuC WOPCM for rc6

[Peter Antoine]

Tom,

Might be worth taking the "Do Not Merge" message out.

Peter.

On Wed, 6 Apr 2016, tom.orourke at intel.com wrote:

> From: Peter Antoine <peter.antoine at intel.com>
>
> This patch resizes the GuC WOPCM to so that the GuC and the RC6 memory
> spaces do not overlap.
>
> DO NOT MERGE: This patch is expected as part of another
> series and is included for convenience in testing this
> series.
>
> Issue: https://jira01.devtools.intel.com/browse/VIZ-6638
> Signed-off-by: Peter Antoine <peter.antoine at intel.com>
> Signed-off-by: Jeff McGee <jeff.mcgee at intel.com>
> Acked-by: Tom O'Rourke <Tom.O'Rourke at intel.com>
> ---
> drivers/gpu/drm/i915/i915_guc_reg.h     | 3 ++-
> drivers/gpu/drm/i915/intel_guc_loader.c | 6 +++++-
> 2 files changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_guc_reg.h b/drivers/gpu/drm/i915/i915_guc_reg.h
> index 80786d9..0a86599 100644
> --- a/drivers/gpu/drm/i915/i915_guc_reg.h
> +++ b/drivers/gpu/drm/i915/i915_guc_reg.h
> @@ -68,7 +68,8 @@
> #define GUC_MAX_IDLE_COUNT		_MMIO(0xC3E4)
>
> #define GUC_WOPCM_SIZE			_MMIO(0xc050)
> -#define   GUC_WOPCM_SIZE_VALUE  	  (0x80 << 12)	/* 512KB */
> +#define   GUC_WOPCM_SIZE_VALUE		(0x80 << 12)	/* 512KB */
> +#define   BXT_GUC_WOPCM_SIZE_VALUE	(0x70 << 12)	/* 448KB */
>
> /* GuC addresses below GUC_WOPCM_TOP don't map through the GTT */
> #define	GUC_WOPCM_TOP			(GUC_WOPCM_SIZE_VALUE)
> diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c
> index a46dd93..a9429d9 100644
> --- a/drivers/gpu/drm/i915/intel_guc_loader.c
> +++ b/drivers/gpu/drm/i915/intel_guc_loader.c
> @@ -343,7 +343,11 @@ static int guc_ucode_xfer(struct drm_i915_private *dev_priv)
> 	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
>
> 	/* init WOPCM */
> -	I915_WRITE(GUC_WOPCM_SIZE, GUC_WOPCM_SIZE_VALUE);
> +	if (IS_BROXTON(dev))
> +		I915_WRITE(GUC_WOPCM_SIZE, BXT_GUC_WOPCM_SIZE_VALUE);
> +	else
> +		I915_WRITE(GUC_WOPCM_SIZE, GUC_WOPCM_SIZE_VALUE);
> +
> 	I915_WRITE(DMA_GUC_WOPCM_OFFSET, GUC_WOPCM_OFFSET_VALUE);
>
> 	/* Enable MIA caching. GuC clock gating is disabled. */
>

--
    Peter Antoine (Android Graphics Driver Software Engineer)
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