From 5cb651a7959310ef4dbb0b93f005b10286789656 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Mon, 3 Oct 2016 10:55:16 +0300 Subject: [PATCH] drm/i915: Allow DP to work w/o EDID MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Allow returning "connected" or "unknown" connector status for DP branch devices that don't have an EDID. Currently we'd claim the thing as "disconnected" if there is no EDID. This stuff used to broken already, I think, but it got more broken by commit f21a21983ef1 ("drm/i915: Splitting intel_dp_detect") Cc: Damien Cassou Cc: freedesktop.org@gp.mailgun.org Cc: Arno Cc: Shubhangi Shrivastava Cc: Sivakumar Thulasimani Cc: Ander Conselvan de Oliveira Cc: stable@vger.kernel.org Tested-by: Arno Fixes: f21a21983ef1 ("drm/i915: Splitting intel_dp_detect") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=83348 Signed-off-by: Ville Syrjälä Link: http://patchwork.freedesktop.org/patch/msgid/1475481316-8194-2-git-send-email-ville.syrjala@linux.intel.com Reviewed-by: Ander Conselvan de Oliveira --- drivers/gpu/drm/i915/intel_dp.c | 22 +++++++++------------- 1 file changed, 9 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 96caa469e3a8..5992093e1814 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -4333,7 +4333,7 @@ intel_dp_unset_edid(struct intel_dp *intel_dp) intel_dp->has_audio = false; } -static void +static enum drm_connector_status intel_dp_long_pulse(struct intel_connector *intel_connector) { struct drm_connector *connector = &intel_connector->base; @@ -4357,7 +4357,7 @@ intel_dp_long_pulse(struct intel_connector *intel_connector) else status = connector_status_disconnected; - if (status != connector_status_connected) { + if (status == connector_status_disconnected) { intel_dp->compliance_test_active = 0; intel_dp->compliance_test_type = 0; intel_dp->compliance_test_data = 0; @@ -4419,8 +4419,8 @@ intel_dp_long_pulse(struct intel_connector *intel_connector) intel_dp->aux.i2c_defer_count = 0; intel_dp_set_edid(intel_dp); - - status = connector_status_connected; + if (is_edp(intel_dp) || intel_connector->detect_edid) + status = connector_status_connected; intel_dp->detect_done = true; /* Try to read the source of the interrupt */ @@ -4439,12 +4439,11 @@ intel_dp_long_pulse(struct intel_connector *intel_connector) } out: - if ((status != connector_status_connected) && - (intel_dp->is_mst == false)) + if (status != connector_status_connected && !intel_dp->is_mst) intel_dp_unset_edid(intel_dp); intel_display_power_put(to_i915(dev), power_domain); - return; + return status; } static enum drm_connector_status @@ -4453,7 +4452,7 @@ intel_dp_detect(struct drm_connector *connector, bool force) struct intel_dp *intel_dp = intel_attached_dp(connector); struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); struct intel_encoder *intel_encoder = &intel_dig_port->base; - struct intel_connector *intel_connector = to_intel_connector(connector); + enum drm_connector_status status = connector->status; DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name); @@ -4468,14 +4467,11 @@ intel_dp_detect(struct drm_connector *connector, bool force) /* If full detect is not performed yet, do a full detect */ if (!intel_dp->detect_done) - intel_dp_long_pulse(intel_dp->attached_connector); + status = intel_dp_long_pulse(intel_dp->attached_connector); intel_dp->detect_done = false; - if (is_edp(intel_dp) || intel_connector->detect_edid) - return connector_status_connected; - else - return connector_status_disconnected; + return status; } static void -- 2.20.1