[Intel-gfx] [PATCH v2 6/8] drm/i915/dp: Read DP descriptor for eDP and LSPCON too

[Jani Nikula]

On Mon, 24 Oct 2016, Imre Deak <imre.deak at intel.com> wrote:
> As for external DP sink and branch devices read and print the DP
> descriptor for eDP and LSPCON devices as well to aid debugging.
>
> v2:
> - Split out this change to a separate patch. (Jani)
>
> Cc: Jani Nikula <jani.nikula at intel.com>
> Signed-off-by: Imre Deak <imre.deak at intel.com>

Reviewed-by: Jani Nikula <jani.nikula at intel.com>


> ---
>  drivers/gpu/drm/i915/intel_dp.c     | 4 +++-
>  drivers/gpu/drm/i915/intel_drv.h    | 1 +
>  drivers/gpu/drm/i915/intel_lspcon.c | 2 ++
>  3 files changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 62c5512..043993f 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -1461,7 +1461,7 @@ __intel_dp_read_desc(struct intel_dp *intel_dp, struct intel_dp_desc *desc)
>  	       sizeof(*desc);
>  }
>  
> -static bool intel_dp_read_desc(struct intel_dp *intel_dp)
> +bool intel_dp_read_desc(struct intel_dp *intel_dp)
>  {
>  	struct intel_dp_desc *desc = &intel_dp->desc;
>  	bool oui_sup = intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] &
> @@ -3519,6 +3519,8 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp)
>  	if (!intel_dp_read_dpcd(intel_dp))
>  		return false;
>  
> +	intel_dp_read_desc(intel_dp);
> +
>  	if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11)
>  		dev_priv->no_aux_handshake = intel_dp->dpcd[DP_MAX_DOWNSPREAD] &
>  			DP_NO_AUX_HANDSHAKE_LINK_TRAINING;
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index ff9d2dc..a79cbad 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1462,6 +1462,7 @@ static inline unsigned int intel_dp_unused_lane_mask(int lane_count)
>  }
>  
>  bool intel_dp_read_dpcd(struct intel_dp *intel_dp);
> +bool intel_dp_read_desc(struct intel_dp *intel_dp);
>  
>  /* intel_dp_aux_backlight.c */
>  int intel_dp_aux_init_backlight_funcs(struct intel_connector *intel_connector);
> diff --git a/drivers/gpu/drm/i915/intel_lspcon.c b/drivers/gpu/drm/i915/intel_lspcon.c
> index 23b817a..c5f278b 100644
> --- a/drivers/gpu/drm/i915/intel_lspcon.c
> +++ b/drivers/gpu/drm/i915/intel_lspcon.c
> @@ -136,6 +136,8 @@ bool lspcon_init(struct intel_digital_port *intel_dig_port)
>  		return false;
>  	}
>  
> +	intel_dp_read_desc(dp);
> +
>  	DRM_DEBUG_KMS("Success: LSPCON init\n");
>  	return true;
>  }

-- 
Jani Nikula, Intel Open Source Technology Center