> -----Original Message-----
> From: Intel-gfx <intel-gfx-boun...@lists.freedesktop.org> On Behalf Of Matt
> Roper
> Sent: Tuesday, May 5, 2020 4:22 AM
> To: intel-gfx@lists.freedesktop.org
> Subject: [Intel-gfx] [PATCH v2 15/22] drm/i915/rkl: Add DDC pin mapping
>
> The pin mapping for the final two outputs varies according to which PCH is
> present on the platform: with TGP the pins are remapped into the TC range,
> whereas with CMP they stay in the traditional combo output range.
>
> Bspec: 49181
> Cc: Aditya Swarup <aditya.swa...@intel.com>
> Signed-off-by: Matt Roper <matthew.d.ro...@intel.com>
Reviewed-by: Anusha Srivatsa <anusha.sriva...@intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_hdmi.c | 22 +++++++++++++++++++++-
> 1 file changed, 21 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c
> b/drivers/gpu/drm/i915/display/intel_hdmi.c
> index 010f37240710..a31a98d26882 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
> @@ -3082,6 +3082,24 @@ static u8 mcc_port_to_ddc_pin(struct
> drm_i915_private *dev_priv, enum port port)
> return ddc_pin;
> }
>
> +static u8 rkl_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum
> +port port) {
> + enum phy phy = intel_port_to_phy(dev_priv, port);
> +
> + WARN_ON(port == PORT_C);
> +
> + /*
> + * Pin mapping for RKL depends on which PCH is present. With TGP,
> the
> + * final two outputs use type-c pins, even though they're actually
> + * combo outputs. With CMP, the traditional DDI A-D pins are used for
> + * all outputs.
> + */
> + if (INTEL_PCH_TYPE(dev_priv) >= PCH_TGP && phy >= PHY_C)
> + return GMBUS_PIN_9_TC1_ICP + phy - PHY_C;
> +
> + return GMBUS_PIN_1_BXT + phy;
> +}
> +
> static u8 g4x_port_to_ddc_pin(struct drm_i915_private *dev_priv,
> enum port port)
> {
> @@ -3119,7 +3137,9 @@ static u8 intel_hdmi_ddc_pin(struct intel_encoder
> *encoder)
> return ddc_pin;
> }
>
> - if (HAS_PCH_MCC(dev_priv))
> + if (IS_ROCKETLAKE(dev_priv))
> + ddc_pin = rkl_port_to_ddc_pin(dev_priv, port);
> + else if (HAS_PCH_MCC(dev_priv))
> ddc_pin = mcc_port_to_ddc_pin(dev_priv, port);
> else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
> ddc_pin = icl_port_to_ddc_pin(dev_priv, port);
> --
> 2.24.1
>
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