[Intel-gfx] [PATCH 2/3] drm/i915/pps: Enable 2nd pps for dual EDP scenario

[Jani Nikula]

On Wed, 09 Nov 2022, Ville Syrjälä <ville.syrjala at linux.intel.com> wrote:
> On Wed, Nov 09, 2022 at 12:25:59PM +0200, Jani Nikula wrote:
>> On Wed, 09 Nov 2022, Ville Syrjälä <ville.syrjala at linux.intel.com> wrote:
>> > On Wed, Nov 09, 2022 at 02:48:21AM +0530, Animesh Manna wrote:
>> >> >From display gen12 onwards to support dual EDP two instances of pps added.
>> >> Currently backlight controller and pps instance can be mapped together
>> >> for a specific panel. Extended support for gen12 for dual EDP usage.
>> >> 
>> >> v1: Iniital revision
>> >> v2: Called intel_bios_panel_init w/o PNPID before intel_pps_init. [Jani]
>> >> 
>> >> Cc: Jani Nikula <jani.nikula at intel.com>
>> >> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
>> >> Cc: Uma Shankar <uma.shankar at intel.com>
>> >> Signed-off-by: Animesh Manna <animesh.manna at intel.com>
>> >> ---
>> >>  drivers/gpu/drm/i915/display/intel_bios.c | 7 -------
>> >>  drivers/gpu/drm/i915/display/intel_bios.h | 7 +++++++
>> >>  drivers/gpu/drm/i915/display/intel_dp.c   | 9 ++++++---
>> >>  drivers/gpu/drm/i915/display/intel_pps.c  | 2 +-
>> >>  4 files changed, 14 insertions(+), 11 deletions(-)
>> >> 
>> >> diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
>> >> index c2987f2c2b2e..fca44be9bab8 100644
>> >> --- a/drivers/gpu/drm/i915/display/intel_bios.c
>> >> +++ b/drivers/gpu/drm/i915/display/intel_bios.c
>> >> @@ -706,13 +706,6 @@ static int fallback_get_panel_type(struct drm_i915_private *i915,
>> >>  	return 0;
>> >>  }
>> >>  
>> >> -enum panel_type {
>> >> -	PANEL_TYPE_OPREGION,
>> >> -	PANEL_TYPE_VBT,
>> >> -	PANEL_TYPE_PNPID,
>> >> -	PANEL_TYPE_FALLBACK,
>> >> -};
>> >> -
>> >>  static int get_panel_type(struct drm_i915_private *i915,
>> >>  			  const struct intel_bios_encoder_data *devdata,
>> >>  			  const struct edid *edid)
>> >> diff --git a/drivers/gpu/drm/i915/display/intel_bios.h b/drivers/gpu/drm/i915/display/intel_bios.h
>> >> index e375405a7828..da01b13260ae 100644
>> >> --- a/drivers/gpu/drm/i915/display/intel_bios.h
>> >> +++ b/drivers/gpu/drm/i915/display/intel_bios.h
>> >> @@ -231,6 +231,13 @@ struct mipi_pps_data {
>> >>  	u16 panel_power_cycle_delay;
>> >>  } __packed;
>> >>  
>> >> +enum panel_type {
>> >> +	PANEL_TYPE_OPREGION,
>> >> +	PANEL_TYPE_VBT,
>> >> +	PANEL_TYPE_PNPID,
>> >> +	PANEL_TYPE_FALLBACK,
>> >> +};
>> >> +
>> >>  void intel_bios_init(struct drm_i915_private *dev_priv);
>> >>  void intel_bios_init_panel(struct drm_i915_private *dev_priv,
>> >>  			   struct intel_panel *panel,
>> >> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
>> >> index 7400d6b4c587..08ece347f7cb 100644
>> >> --- a/drivers/gpu/drm/i915/display/intel_dp.c
>> >> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
>> >> @@ -5254,6 +5254,9 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
>> >>  		return false;
>> >>  	}
>> >>  
>> >> +	intel_bios_init_panel(dev_priv, &intel_connector->panel,
>> >> +			      encoder->devdata, NULL);
>> >> +
>> >>  	intel_pps_init(intel_dp);
>> >>  
>> >>  	/* Cache DPCD and EDID for edp. */
>> >> @@ -5288,9 +5291,9 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
>> >>  		edid = ERR_PTR(-ENOENT);
>> >>  	}
>> >>  	intel_connector->edid = edid;
>> >> -
>> >> -	intel_bios_init_panel(dev_priv, &intel_connector->panel,
>> >> -			      encoder->devdata, IS_ERR(edid) ? NULL : edid);
>> >> +	if (intel_connector->panel.vbt.panel_type == PANEL_TYPE_FALLBACK)
>> >
>> > vbt.panel_type does _not_ contain enum panel_type (a bit of an 
>> > unfortunate name selection by me there I guess).
>> >
>> >> +		intel_bios_init_panel(dev_priv, &intel_connector->panel,
>> >> +				      encoder->devdata, IS_ERR(edid) ? NULL : edid);
>> >
>> > I suspect just calling this twice might leak all kinds of stuff.
>> 
>> Yeah, what's up with this, this is some old version that was fixed way
>> back too. I thought this was good to go:
>> 
>> https://lore.kernel.org/r/20221018083921.23239-2-animesh.manna@intel.com
>
> That look broken in exactly the same way wrt. enum panel_type.

You're right, of course.

BR,
Jani.


>
>> 
>> >
>> >>  
>> >>  	intel_panel_add_edid_fixed_modes(intel_connector, true);
>> >>  
>> >> diff --git a/drivers/gpu/drm/i915/display/intel_pps.c b/drivers/gpu/drm/i915/display/intel_pps.c
>> >> index 3949fb449353..0975e49f8d03 100644
>> >> --- a/drivers/gpu/drm/i915/display/intel_pps.c
>> >> +++ b/drivers/gpu/drm/i915/display/intel_pps.c
>> >> @@ -1430,7 +1430,7 @@ void intel_pps_init(struct intel_dp *intel_dp)
>> >>  	intel_dp->pps.initializing = true;
>> >>  	INIT_DELAYED_WORK(&intel_dp->pps.panel_vdd_work, edp_panel_vdd_work);
>> >>  
>> >> -	if (IS_GEMINILAKE(i915) || IS_BROXTON(i915))
>> >> +	if (IS_GEMINILAKE(i915) || IS_BROXTON(i915) || DISPLAY_VER(i915) >= 12)
>> >>  		intel_dp->get_pps_idx = bxt_power_sequencer_idx;
>> >>  	else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
>> >>  		intel_dp->get_pps_idx = vlv_power_sequencer_pipe;
>> >> -- 
>> >> 2.29.0
>> 
>> -- 
>> Jani Nikula, Intel Open Source Graphics Center

-- 
Jani Nikula, Intel Open Source Graphics Center