[Intel-xe] [PATCH 30/42] drm/i915/xe2lpd: Extend Wa_15010685871

[Matt Roper]

On Wed, Aug 23, 2023 at 10:07:28AM -0700, Lucas De Marchi wrote:
> Xe2_LPD also needs workaround 15010685871.
> 
> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_cdclk.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
> index 4207863b7b2a..fdd8d04fe12c 100644
> --- a/drivers/gpu/drm/i915/display/intel_cdclk.c
> +++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
> @@ -1839,9 +1839,9 @@ static bool cdclk_compute_crawl_and_squash_midpoint(struct drm_i915_private *i91
>  
>  static bool pll_enable_wa_needed(struct drm_i915_private *dev_priv)
>  {
> -	return ((IS_DG2(dev_priv) || IS_METEORLAKE(dev_priv)) &&
> -		dev_priv->display.cdclk.hw.vco > 0 &&
> -		HAS_CDCLK_SQUASH(dev_priv));
> +	return (IS_DG2(dev_priv) || IS_METEORLAKE(dev_priv) ||
> +		DISPLAY_VER(dev_priv) == 20) &&

We may have future 20.xx platforms for which this doesn't hold true.
This should probably be a "DISPLAY_VER_FULL(dev_priv) == IP_VER(20, 0)"
to exactly match Xe2_LPD and nothing else.

Note that the drm-intel version of the code has already replaced the MTL
check with an Xe_LPD+ version check, but that hasn't propagated to
drm-xe-next yet.

While we're here, we can probably re-order this too (newest platform
first).


Matt

> +		dev_priv->display.cdclk.hw.vco > 0 && HAS_CDCLK_SQUASH(dev_priv);
>  }
>  
>  static void _bxt_set_cdclk(struct drm_i915_private *dev_priv,
> -- 
> 2.40.1
> 

-- 
Matt Roper
Graphics Software Engineer
Linux GPU Platform Enablement
Intel Corporation