> -----Original Message-----
> From: Govindapillai, Vinod <[email protected]>
> Sent: Tuesday, November 11, 2025 6:16 PM
> To: [email protected]; [email protected]
> Cc: Govindapillai, Vinod <[email protected]>; Shankar, Uma
> <[email protected]>; Joshi, Kunal1 <[email protected]>; Nikula, Jani
> <[email protected]>; De Marchi, Lucas <[email protected]>; Roper,
> Matthew D <[email protected]>
> Subject: [PATCH v2] drm/i915/fbc: Apply wa_15018326506
>
> Disable FBC in bmg as per the wa recommendation.
>
> v2: use the bmg platform instead of a specific stepping
Acked-by: Uma Shankar <[email protected]>
> Bspec: 74212
> Signed-off-by: Vinod Govindapillai <[email protected]>
> ---
> drivers/gpu/drm/i915/display/intel_display_wa.c | 2 ++
> drivers/gpu/drm/i915/display/intel_display_wa.h | 1 +
> drivers/gpu/drm/i915/display/intel_fbc.c | 10 ++++++++++
> 3 files changed, 13 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_wa.c
> b/drivers/gpu/drm/i915/display/intel_display_wa.c
> index e38e5e87877c..b2e71fa61c0a 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_wa.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_wa.c
> @@ -70,6 +70,8 @@ bool __intel_display_wa(struct intel_display *display, enum
> intel_display_wa wa,
> return DISPLAY_VER(display) == 13;
> case INTEL_DISPLAY_WA_22014263786:
> return IS_DISPLAY_VERx100(display, 1100, 1400);
> + case INTEL_DISPLAY_WA_15018326506:
> + return display->platform.battlemage;
> default:
> drm_WARN(display->drm, 1, "Missing Wa number: %s\n", name);
> break;
> diff --git a/drivers/gpu/drm/i915/display/intel_display_wa.h
> b/drivers/gpu/drm/i915/display/intel_display_wa.h
> index 3644e8e2b724..f648b00cb97d 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_wa.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_wa.h
> @@ -26,6 +26,7 @@ enum intel_display_wa {
> INTEL_DISPLAY_WA_16025573575,
> INTEL_DISPLAY_WA_14011503117,
> INTEL_DISPLAY_WA_22014263786,
> + INTEL_DISPLAY_WA_15018326506,
> };
>
> bool __intel_display_wa(struct intel_display *display, enum intel_display_wa
> wa,
> const char *name); diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c
> b/drivers/gpu/drm/i915/display/intel_fbc.c
> index a1e3083022ee..16cd99db2978 100644
> --- a/drivers/gpu/drm/i915/display/intel_fbc.c
> +++ b/drivers/gpu/drm/i915/display/intel_fbc.c
> @@ -1521,6 +1521,16 @@ static int intel_fbc_check_plane(struct
> intel_atomic_state *state,
> return 0;
> }
>
> + /*
> + * wa_15018326506:
> + * Fixes: Underrun during media decode
> + * Workaround: Do not enable FBC
> + */
> + if (intel_display_wa(display, 15018326506)) {
> + plane_state->no_fbc_reason = "Wa_15018326506";
> + return 0;
> + }
> +
> /* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */
> if (intel_display_vtd_active(display) &&
> (display->platform.skylake || display->platform.broxton)) {
> --
> 2.43.0
