From 12a47a422862214d3a715a0bd93140b8176dcdc9 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Mon, 24 Oct 2016 19:33:29 +0300 Subject: [PATCH] drm/i915/dp: Read DP descriptor for eDP and LSPCON too 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 Signed-off-by: Imre Deak Reviewed-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/1477326811-30431-7-git-send-email-imre.deak@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 07a502fd6773..6eb43647163c 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] & @@ -3521,6 +3521,8 @@ 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 b9583268aafb..20fb6e72e90e 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1468,6 +1468,7 @@ 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 23b817acd99d..c5f278b250a7 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; }