On Mon, 24 Oct 2016, Imre Deak <imre.deak@xxxxxxxxx> 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@xxxxxxxxx>
> Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> 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
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