[Intel-gfx] [PATCH 5/5] drm/i915/vbt: Parse power conservation features block

[Matt Roper]

On Tue, Nov 05, 2019 at 05:45:04PM -0800, José Roberto de Souza wrote:
> Since VBT 228 is from this block that PSR and other power saving
> features configuration should be read from.
> 
> Cc: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
> Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_bios.c     | 19 +++++++++++-
>  drivers/gpu/drm/i915/display/intel_vbt_defs.h | 29 +++++++++++++++++++
>  2 files changed, 47 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
> index a03f56b7b4ef..bf79e9858bd8 100644
> --- a/drivers/gpu/drm/i915/display/intel_bios.c
> +++ b/drivers/gpu/drm/i915/display/intel_bios.c
> @@ -561,7 +561,23 @@ parse_driver_features(struct drm_i915_private *dev_priv,
>  	 */
>  	if (!driver->drrs_enabled)
>  		dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
> -	dev_priv->vbt.psr.enable = driver->psr_enabled;
> +	if (bdb->version < 228)
> +		dev_priv->vbt.psr.enable = driver->psr_enabled;
> +}
> +
> +static void
> +parse_power_conservation_features(struct drm_i915_private *dev_priv,
> +				  const struct bdb_header *bdb)
> +{
> +	const struct bdb_lfp_power *power;
> +	u8 panel_type = dev_priv->vbt.panel_type;
> +
> +	power = find_section(bdb, BDB_LVDS_POWER);
> +	if (!power)
> +		return;
> +
> +	if (bdb->version >= 228)
> +		dev_priv->vbt.psr.enable = power->psr & (1 << panel_type);

Should we also be setting dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED
if block 44 tells us it isn't valid on this panel?


Matt

>  }
>  
>  static void
> @@ -1878,6 +1894,7 @@ void intel_bios_init(struct drm_i915_private *dev_priv)
>  	parse_lfp_backlight(dev_priv, bdb);
>  	parse_sdvo_panel_data(dev_priv, bdb);
>  	parse_driver_features(dev_priv, bdb);
> +	parse_power_conservation_features(dev_priv, bdb);
>  	parse_edp(dev_priv, bdb);
>  	parse_psr(dev_priv, bdb);
>  	parse_mipi_config(dev_priv, bdb);
> diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
> index 69a7cb1fa121..31f47ce56587 100644
> --- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h
> +++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
> @@ -792,6 +792,35 @@ struct bdb_lfp_backlight_data {
>  	struct lfp_backlight_control_method backlight_control[16];
>  } __packed;
>  
> +/*
> + * Block 44 - LFP Power Conservation Features Block
> + */
> +
> +struct als_data_entry {
> +	u16 backlight_adjust;
> +	u16 lux;
> +} __packed;
> +
> +struct agressiveness_profile_entry {
> +	u8 dpst_agressiveness : 4;
> +	u8 lace_agressiveness : 4;
> +} __packed;
> +
> +struct bdb_lfp_power {
> +	u8 lfp_feature_bits;
> +	struct als_data_entry als[5];
> +	u8 lace_aggressiveness_profile;
> +	u16 dpst;
> +	u16 psr;
> +	u16 drrs;
> +	u16 lace_support;
> +	u16 adt;
> +	u16 dmrrs;
> +	u16 adb;
> +	u16 lace_enabled_status;
> +	struct agressiveness_profile_entry aggressivenes[16];
> +} __packed;
> +
>  /*
>   * Block 52 - MIPI Configuration Block
>   */
> -- 
> 2.24.0
> 
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-- 
Matt Roper
Graphics Software Engineer
VTT-OSGC Platform Enablement
Intel Corporation
(916) 356-2795