[Intel-gfx] [PATCH v3 1/3] drm/i915/bios: Parse HOBL parameter

[Srivatsa, Anusha]

> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of José
> Roberto de Souza
> Sent: Thursday, June 25, 2020 5:59 AM
> To: intel-gfx at lists.freedesktop.org
> Subject: [Intel-gfx] [PATCH v3 1/3] drm/i915/bios: Parse HOBL parameter
> 
> HOBL means hours of battery life, it is a power-saving feature were
> supported motherboards can use a special voltage swing table that uses
> less power.
> 
> So here parsing the VBT to check if this feature is supported.
> 
> BSpec: 20150
> Signed-off-by: José Roberto de Souza <jose.souza at intel.com>

Reviewed-by: Anusha Srivatsa <anusha.srivatsa at intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_bios.c     | 3 +++
>  drivers/gpu/drm/i915/display/intel_vbt_defs.h | 1 +
>  drivers/gpu/drm/i915/i915_drv.h               | 1 +
>  3 files changed, 5 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_bios.c
> b/drivers/gpu/drm/i915/display/intel_bios.c
> index 6593e2c38043..c53c85d38fa5 100644
> --- a/drivers/gpu/drm/i915/display/intel_bios.c
> +++ b/drivers/gpu/drm/i915/display/intel_bios.c
> @@ -722,6 +722,9 @@ parse_power_conservation_features(struct
> drm_i915_private *dev_priv,
>  	 */
>  	if (!(power->drrs & BIT(panel_type)))
>  		dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
> +
> +	if (bdb->version >= 232)
> +		dev_priv->vbt.edp.hobl = power->hobl & BIT(panel_type);
>  }
> 
>  static void
> diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h
> b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
> index aef7fe932d1a..6faabd4f6d49 100644
> --- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h
> +++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
> @@ -820,6 +820,7 @@ struct bdb_lfp_power {
>  	u16 adb;
>  	u16 lace_enabled_status;
>  	struct agressiveness_profile_entry aggressivenes[16];
> +	u16 hobl; /* 232+ */
>  } __packed;
> 
>  /*
> diff --git a/drivers/gpu/drm/i915/i915_drv.h
> b/drivers/gpu/drm/i915/i915_drv.h index 9aad3ec979bd..16692c94351a
> 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -690,6 +690,7 @@ struct intel_vbt_data {
>  		bool initialized;
>  		int bpp;
>  		struct edp_power_seq pps;
> +		bool hobl;
>  	} edp;
> 
>  	struct {
> --
> 2.27.0
> 
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