Re: [PATCH i-g-t] tools/intel_vbt_decode: Add decoding for eDP pipe joiner enable flag

[Jani Nikula <jani.nikula@intel.com>]

On Thu, 08 Jan 2026, Ankit Nautiyal <ankit.k.nautiyal@intel.com> wrote:
> Extend intel_vbt_decode to parse and display the VBT field that
> controls eDP Pipe Joiner enablement. This field was introduced in VBT
> version 261 and allows OEMs to specify whether the joiner feature should
> be enabled for eDP panels.
>
> Bspec:20142
> Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
> ---
>  tools/intel_vbt_decode.c | 4 ++++
>  tools/intel_vbt_defs.h   | 1 +
>  2 files changed, 5 insertions(+)
>
> diff --git a/tools/intel_vbt_decode.c b/tools/intel_vbt_decode.c
> index d4aada743e42..a96b936d4b8e 100644
> --- a/tools/intel_vbt_decode.c
> +++ b/tools/intel_vbt_decode.c
> @@ -2483,6 +2483,10 @@ static void dump_edp(struct context *context,
>  		if (context->bdb->version >= 251)
>  			printf("\t\teDP DSC disable: %s\n",
>  			       YESNO(panel_bool(edp->edp_dsc_disable, i)));
> +
> +		if (context->bdb->version >= 261)
> +			printf("\t\teDP Joiner Enable: %s\n",
> +			       YESNO(panel_bool(edp->joiner_enable, i)));
>  	}
>  }
>  
> diff --git a/tools/intel_vbt_defs.h b/tools/intel_vbt_defs.h
> index 6612d3a4ec49..550a9bfba868 100644
> --- a/tools/intel_vbt_defs.h
> +++ b/tools/intel_vbt_defs.h
> @@ -1090,6 +1090,7 @@ struct bdb_edp {
>  	u16 edp_dsc_disable;					/* 251+ */
>  	u16 t6_delay_support;					/* 260+ */
>  	u16 link_idle_time[16];					/* 260+ */
> +	u16 joiner_enable;					/* 261+ */

Changes to intel_vbt_defs.h *must* be just copies from the kernel, with
the commit message referencing the kernel commit. See git log of the
file in igt.

If the field doesn't exist in the kernel version yet, then please get
that merged first.


BR,
Jani.


>  } __packed;
>  
>  /*

-- 
Jani Nikula, Intel