[PATCH v3 1/4] drm/xe/bmg: Update Wa_14022085890

[Summers, Stuart]

On Mon, 2025-06-02 at 16:44 -0700, Vinay Belgaumkar wrote:
> Set GT min frequency to 1200Mhz once driver load is
> complete.
> 
> v2: Review comments (Rodrigo)
> v3: Apply Wa earlier so user_req_min is not clobbered.
> 
> Cc: Matt Roper <matthew.d.roper at intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar at intel.com>
> ---
>  drivers/gpu/drm/xe/xe_guc_pc.c     | 5 +++++
>  drivers/gpu/drm/xe/xe_wa_oob.rules | 1 +
>  2 files changed, 6 insertions(+)
> 
> diff --git a/drivers/gpu/drm/xe/xe_guc_pc.c
> b/drivers/gpu/drm/xe/xe_guc_pc.c
> index 18c623992035..cb0563494fcc 100644
> --- a/drivers/gpu/drm/xe/xe_guc_pc.c
> +++ b/drivers/gpu/drm/xe/xe_guc_pc.c
> @@ -51,6 +51,7 @@
>  
>  #define LNL_MERT_FREQ_CAP      800
>  #define BMG_MERT_FREQ_CAP      2133
> +#define BMG_MIN_FREQ           1200
>  
>  #define SLPC_RESET_TIMEOUT_MS 5 /* roughly 5ms, but no need for
> precision */
>  #define SLPC_RESET_EXTENDED_TIMEOUT_MS 1000 /* To be used only at
> pc_start */
> @@ -843,6 +844,9 @@ static int pc_adjust_freq_bounds(struct xe_guc_pc
> *pc)
>         if (pc_get_min_freq(pc) > pc->rp0_freq)
>                 ret = pc_set_min_freq(pc, pc->rp0_freq);
>  
> +       if (XE_WA(pc_to_gt(pc), 14022085890))
> +               ret = pc_set_min_freq(pc, max(BMG_MIN_FREQ,
> pc_get_min_freq(pc)));

Do we want this above the get_min_freq() call above? Seems like that
would further limit which is what we'd want in that case right?

Thanks,
Stuart

> +
>  out:
>         return ret;
>  }
> @@ -879,6 +883,7 @@ static int pc_set_mert_freq_cap(struct xe_guc_pc
> *pc)
>                 ret = xe_guc_pc_get_min_freq(pc, &pc-
> >stashed_min_freq);
>                 if (!ret)
>                         ret = xe_guc_pc_get_max_freq(pc, &pc-
> >stashed_max_freq);
> +
>                 if (ret)
>                         return ret;
>  
> diff --git a/drivers/gpu/drm/xe/xe_wa_oob.rules
> b/drivers/gpu/drm/xe/xe_wa_oob.rules
> index 9efc5accd43d..75fbdab68d44 100644
> --- a/drivers/gpu/drm/xe/xe_wa_oob.rules
> +++ b/drivers/gpu/drm/xe/xe_wa_oob.rules
> @@ -59,3 +59,4 @@ no_media_l3   MEDIA_VERSION(3000)
>                 MEDIA_VERSION_RANGE(1301, 3000)
>  16026508708    GRAPHICS_VERSION_RANGE(1200, 3001)
>                 MEDIA_VERSION_RANGE(1300, 3000)
> +14022085890    GRAPHICS_VERSION(2001)