On Tue, 05 Apr 2022, Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx> wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> Extract the seamless DRRS min refresh rate from the VBT.
>
> v2: Do a version check
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> 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
