[Intel-gfx] [PATCH v3 2/6] drm/i915: Only initialize dlk phy lock in display 12 and newer

[Ville Syrjälä]

On Mon, Apr 10, 2023 at 11:32:15AM -0700, José Roberto de Souza wrote:
> This spin lock will not be used in older display versions, so no need
> to initialize it.
> 
> Cc: intel-gfx at lists.freedesktop.org
> Cc: intel-xe at lists.freedesktop.org
> Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dkl_phy.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dkl_phy.c b/drivers/gpu/drm/i915/display/intel_dkl_phy.c
> index 5bce7b5b27bc7..1c5d410b74e5d 100644
> --- a/drivers/gpu/drm/i915/display/intel_dkl_phy.c
> +++ b/drivers/gpu/drm/i915/display/intel_dkl_phy.c
> @@ -108,5 +108,6 @@ intel_dkl_phy_posting_read(struct drm_i915_private *i915, struct intel_dkl_phy_r
>  void
>  intel_dkl_phy_init(struct drm_i915_private *i915)
>  {
> -	spin_lock_init(&i915->display.dkl.phy_lock);
> +	if (DISPLAY_VER(i915) >= 12)

Looks like a pointless check to me. This is so cheap it doesn't
matter, and less LOC is better.

> +		spin_lock_init(&i915->display.dkl.phy_lock);
>  }
> -- 
> 2.40.0

-- 
Ville Syrjälä
Intel