Re: [Intel-gfx] [PATCH 2/6] drm/i915/bios: Use i915->vbt.ports[] on CHV

[Jani Nikula <jani.nikula@linux.intel.com>]

On Fri, 17 Dec 2021, Ville Syrjala <ville.syrjala@linux.intel.com> wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> CHV is currently straddling the divide by using parse_ddi_ports() stuff
> for aux_ch/ddc_pin but going through all old codepaths for the rest
> (intel_bios_is_port_present(), intel_bios_is_port_edp(),
> intel_bios_is_port_dp_dual_mode()). Let's switch over full and use
> i915->vbt.ports[] for the rest of the stuff.
>
> dvo_port_to_port() doesn't know about DSI so we won't get into
> any kind of "is port B HDMI or DSI or both?" conundrum, which
> could otherwise happen on VLV/CHV due to DSI ports living in a
> separate world from the other digital ports.

This is also very subtle! But it does somewhat nicely dodge the whole
question, and moves things forward.

>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_bios.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
> index fce1ea7a6693..b7adea9827c3 100644
> --- a/drivers/gpu/drm/i915/display/intel_bios.c
> +++ b/drivers/gpu/drm/i915/display/intel_bios.c
> @@ -2075,14 +2075,14 @@ static void parse_ddi_port(struct drm_i915_private *i915,
>  
>  static bool has_ddi_port_info(struct drm_i915_private *i915)
>  {
> -	return HAS_DDI(i915);
> +	return HAS_DDI(i915) || IS_CHERRYVIEW(i915);
>  }
>  
>  static void parse_ddi_ports(struct drm_i915_private *i915)
>  {
>  	struct intel_bios_encoder_data *devdata;
>  
> -	if (!HAS_DDI(i915) && !IS_CHERRYVIEW(i915))
> +	if (!has_ddi_port_info(i915))
>  		return;
>  
>  	if (i915->vbt.version < 155)

-- 
Jani Nikula, Intel Open Source Graphics Center