[Intel-gfx] [PATCH v2 6/7] drm/i915/guc: Notify coarse power gating configuration to GuC properly

[Yu Dai]

On 09/11/2015 09:47 PM, Sagar Arun Kamble wrote:
> From: Alex Dai <yu.dai at intel.com>
>
> GuC expects two bits for Render and Media domain separately when
> driver sends data via host2guc SAMPLE_FORCEWAKE when full coarse power
> gating is enabled. Bit 0 is for Render and bit 1 is for Media domain.
>
> Signed-off-by: Alex Dai <yu.dai at intel.com>
> Signed-off-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
> ---
>   drivers/gpu/drm/i915/i915_guc_submission.c | 9 ++++++++-
>   1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c
> index 792d0b9..05d1eff4 100644
> --- a/drivers/gpu/drm/i915/i915_guc_submission.c
> +++ b/drivers/gpu/drm/i915/i915_guc_submission.c
> @@ -155,10 +155,17 @@ static int host2guc_sample_forcewake(struct intel_guc *guc,
>   				     struct i915_guc_client *client)
>   {
>   	struct drm_i915_private *dev_priv = guc_to_i915(guc);
> +	struct drm_device *dev = dev_priv->dev;
>   	u32 data[2];
>   
>   	data[0] = HOST2GUC_ACTION_SAMPLE_FORCEWAKE;
> -	data[1] = (intel_enable_rc6(dev_priv->dev)) ? 1 : 0;
> +
> +	/* Notify GuC about Coarse Power Gating where supported */
> +	if ((IS_BROXTON(dev) && (INTEL_REVID(dev) < BXT_REVID_B0)) ||
> +                ((IS_SKL_GT3(dev) || IS_SKL_GT4(dev)) && (INTEL_REVID(dev) <= SKL_REVID_E0)))
> +		data[1] = 0;
> +        else
> +		data[1] = (intel_enable_rc6(dev)) ? 3 : 0;
>   

Please hold off this patch. I plan to squash it into 
http://lists.freedesktop.org/archives/intel-gfx/2015-September/075959.html, 
where we remove the magic code '3' here by defining forcewake domain flags.

Thanks,
Alex