> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of José
> Roberto de Souza
> Sent: Thursday, June 25, 2020 5:59 AM
> To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> Subject: [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@xxxxxxxxx>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
> ---
> 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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