[Intel-gfx] [PATCH v4 10/23] drm/i915/adl_p: Don't config MBUS and DBUF during display initialization

[Lisovskiy, Stanislav]

On Fri, May 14, 2021 at 08:10:22PM -0700, Matt Roper wrote:
> From: José Roberto de Souza <jose.souza at intel.com>
> 
> Alderlake-P don't have programing sequences for MBUS or DBUF during
> display initializaiton, instead it requires programing to those
> registers during modeset because it to depend on the pipes left
> enabled.

Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>

> 
> Bspec: 49213
> Cc: Matt Roper <matthew.d.roper at intel.com>
> Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> Signed-off-by: Clinton Taylor <Clinton.A.Taylor at intel.com>
> Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_display_power.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
> index 29d2f1d0cffd..26d2eba87486 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_power.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_power.c
> @@ -5246,6 +5246,9 @@ static void gen12_dbuf_slices_config(struct drm_i915_private *dev_priv)
>  {
>  	enum dbuf_slice slice;
>  
> +	if (IS_ALDERLAKE_P(dev_priv))
> +		return;
> +
>  	for_each_dbuf_slice(dev_priv, slice)
>  		intel_de_rmw(dev_priv, DBUF_CTL_S(slice),
>  			     DBUF_TRACKER_STATE_SERVICE_MASK,
> @@ -5257,6 +5260,9 @@ static void icl_mbus_init(struct drm_i915_private *dev_priv)
>  	unsigned long abox_regs = INTEL_INFO(dev_priv)->abox_mask;
>  	u32 mask, val, i;
>  
> +	if (IS_ALDERLAKE_P(dev_priv))
> +		return;
> +
>  	mask = MBUS_ABOX_BT_CREDIT_POOL1_MASK |
>  		MBUS_ABOX_BT_CREDIT_POOL2_MASK |
>  		MBUS_ABOX_B_CREDIT_MASK |
> -- 
> 2.25.4
> 
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