On Wed, Nov 23, 2022 at 09:03:08AM +0530, Arun R Murthy wrote:
> The WaFbcTurnOffFbcWhenHyperVisorIsUsed is applicable for SKL, BXT and
> KBL.
>
> Bspec: 0852
>
> v2: Updated commit msg and corrected Bspec format(Jani N)
> v3: Updated the stepping information
>
> Signed-off-by: Arun R Murthy <arun.r.murthy@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_fbc.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
> index b5ee5ea0d010..7c06ad454a7d 100644
> --- a/drivers/gpu/drm/i915/display/intel_fbc.c
> +++ b/drivers/gpu/drm/i915/display/intel_fbc.c
> @@ -1652,9 +1652,10 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *i915)
>
> static bool need_fbc_vtd_wa(struct drm_i915_private *i915)
> {
> - /* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */
> + /* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt,kbl */
> if (i915_vtd_active(i915) &&
> - (IS_SKYLAKE(i915) || IS_BROXTON(i915))) {
> + (IS_SKYLAKE(i915) || IS_BROXTON(i915) ||
> + IS_KBL_DISPLAY_STEP(i915, STEP_A0, STEP_B0))) {
No one careas about pre-production hw once the thing has shipped.
> drm_info(&i915->drm,
> "Disabling framebuffer compression (FBC) to prevent screen flicker with VT-d enabled\n");
> return true;
> --
> 2.25.1
--
Ville Syrjälä
Intel
