Re: [Intel-gfx] [PATCH v2 19/22] drm/i915/bios: Parse the seamless DRRS min refresh rate

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

On Tue, 05 Apr 2022, Ville Syrjala <ville.syrjala@linux.intel.com> wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> Extract the seamless DRRS min refresh rate from the VBT.
>
> v2: Do a version check
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

Reviewed-by: Jani Nikula <jani.nikula@intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_bios.c | 9 ++++++++-
>  drivers/gpu/drm/i915/i915_drv.h           | 1 +
>  2 files changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
> index cfdfe91d4ccf..d561551d6324 100644
> --- a/drivers/gpu/drm/i915/display/intel_bios.c
> +++ b/drivers/gpu/drm/i915/display/intel_bios.c
> @@ -802,6 +802,7 @@ parse_lfp_data(struct drm_i915_private *i915)
>  	const struct bdb_lvds_lfp_data *data;
>  	const struct bdb_lvds_lfp_data_tail *tail;
>  	const struct bdb_lvds_lfp_data_ptrs *ptrs;
> +	int panel_type = i915->vbt.panel_type;
>  
>  	ptrs = find_section(i915, BDB_LVDS_LFP_DATA_PTRS);
>  	if (!ptrs)
> @@ -818,7 +819,13 @@ parse_lfp_data(struct drm_i915_private *i915)
>  	if (!tail)
>  		return;
>  
> -	(void)tail;
> +	if (i915->vbt.version >= 188) {
> +		i915->vbt.seamless_drrs_min_refresh_rate =
> +			tail->seamless_drrs_min_refresh_rate[panel_type];
> +		drm_dbg_kms(&i915->drm,
> +			    "Seamless DRRS min refresh rate: %d Hz\n",
> +			    i915->vbt.seamless_drrs_min_refresh_rate);
> +	}
>  }
>  
>  static void
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 9274417cd87a..7b6858651420 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -327,6 +327,7 @@ struct intel_vbt_data {
>  	bool override_afc_startup;
>  	u8 override_afc_startup_val;
>  
> +	u8 seamless_drrs_min_refresh_rate;
>  	enum drrs_type drrs_type;
>  
>  	struct {

-- 
Jani Nikula, Intel Open Source Graphics Center