[Intel-gfx] [PATCH] drm/i915: Enable non-contiguous pipe fusing

[Lucas De Marchi]

On Wed, Mar 11, 2020 at 02:06:32PM +0530, Anshuman Gupta wrote:
>Allow 3-display pipes SKU system with any combination
>in INTEL_INFO pipe mask.
>B.Spec:50075
>
>changes since RFC:
>- using intel_pipe_mask_is_valid() function to check integrity of
>  pipe_mask. [Ville]
>v2:
>- simplify condition in intel_pipe_mask_is_valid(). [Ville]
>v3:
>- removed non-contiguous pipe fusing check. [Lucas]

I'd also say in the commit message that the support for non-contiguous
pipe fusing is *already* supported in the driver. So this check here
doesn't make sense anymore and since it's an unlike condition we
can just stop checking.

Aside from commit message update,

Reviewed-by: Lucas De Marchi <lucas.demarchi at intel.com>

Lucas De Marchi

>
>Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
>Cc: Lucas De Marchi <lucas.demarchi at intel.com>
>Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
>---
> drivers/gpu/drm/i915/intel_device_info.c | 12 +-----------
> 1 file changed, 1 insertion(+), 11 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
>index d7fe12734db8..9ff89e142ff1 100644
>--- a/drivers/gpu/drm/i915/intel_device_info.c
>+++ b/drivers/gpu/drm/i915/intel_device_info.c
>@@ -998,17 +998,7 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
> 		    (dfsm & TGL_DFSM_PIPE_D_DISABLE))
> 			enabled_mask &= ~BIT(PIPE_D);
>
>-		/*
>-		 * At least one pipe should be enabled and if there are
>-		 * disabled pipes, they should be the last ones, with no holes
>-		 * in the mask.
>-		 */
>-		if (enabled_mask == 0 || !is_power_of_2(enabled_mask + 1))
>-			drm_err(&dev_priv->drm,
>-				"invalid pipe fuse configuration: enabled_mask=0x%x\n",
>-				enabled_mask);
>-		else
>-			info->pipe_mask = enabled_mask;
>+		info->pipe_mask = enabled_mask;
>
> 		if (dfsm & SKL_DFSM_DISPLAY_HDCP_DISABLE)
> 			info->display.has_hdcp = 0;
>-- 
>2.25.1
>