Re: [PATCH] drm/i915/bxt: Use intel_encoder->hpd_pin to check live status

From: Rodrigo Vivi <rodrigo.vivi@gmail.com>
To: Sonika Jindal <sonika.jindal@intel.com>, intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915/bxt: Use intel_encoder->hpd_pin to check live status
Date: Fri, 11 Sep 2015 18:00:43 +0000	[thread overview]
Message-ID: <CABVU7+u8yGQAbwj7PjPW2TraT2-fCBRwQSGBvS-Xij0RX+9Y4w@mail.gmail.com> (raw)
In-Reply-To: <1441970912-5961-1-git-send-email-sonika.jindal@intel.com>

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On Fri, Sep 11, 2015 at 4:40 AM Sonika Jindal <sonika.jindal@intel.com>
wrote:

> Using intel_encoder's hpd_pin to check the live status
> because of BXT A0/A1 WA for HPD pins and hpd_pin contains the
> updated pin for the corresponding port.
>

It makes sense, but is it always true? or we should have a fallback to
intel_dig_port->port in some case or in some stepping after A0/A1?

With this clarified feel free to use:
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

>
> Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_dp.c |    9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c
> b/drivers/gpu/drm/i915/intel_dp.c
> index 796f930..bf17030 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -4663,11 +4663,14 @@ static bool vlv_digital_port_connected(struct
> drm_i915_private *dev_priv,
>  }
>
>  static bool bxt_digital_port_connected(struct drm_i915_private *dev_priv,
> -                                      struct intel_digital_port *port)
> +                                      struct intel_digital_port
> *intel_dig_port)
>  {
> +       struct intel_encoder *intel_encoder = &intel_dig_port->base;
> +       enum port port;
>         u32 bit;
>
> -       switch (port->port) {
> +       intel_hpd_pin_to_port(intel_encoder->hpd_pin, &port);
> +       switch (port) {
>         case PORT_A:
>                 bit = BXT_DE_PORT_HP_DDIA;
>                 break;
> @@ -4678,7 +4681,7 @@ static bool bxt_digital_port_connected(struct
> drm_i915_private *dev_priv,
>                 bit = BXT_DE_PORT_HP_DDIC;
>                 break;
>         default:
> -               MISSING_CASE(port->port);
> +               MISSING_CASE(port);
>                 return false;
>         }
>
> --
> 1.7.10.4
>
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