diff options
| author | Imre Deak | 2017-01-27 10:39:19 +0100 |
|---|---|---|
| committer | Imre Deak | 2017-02-06 15:33:27 +0100 |
| commit | 390b4e00241ce14ca3967c4698c8f6a158c5a674 (patch) | |
| tree | c47a07d71d76816fbba3f61d70e586615a848e2c /drivers/gpu/drm/i915/intel_lspcon.c | |
| parent | drm/i915/gen9+: Enable hotplug detection early (diff) | |
| download | kernel-qcow2-linux-390b4e00241ce14ca3967c4698c8f6a158c5a674.tar.gz kernel-qcow2-linux-390b4e00241ce14ca3967c4698c8f6a158c5a674.tar.xz kernel-qcow2-linux-390b4e00241ce14ca3967c4698c8f6a158c5a674.zip | |
drm/i915/lspcon: Fix resume time initialization due to unasserted HPD
During system resume time initialization the HPD level on LSPCON ports
can stay low for an extended amount of time, leading to failed AUX
transfers and LSPCON initialization. Fix this by waiting for HPD to get
asserted.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99178
Cc: Shashank Sharma <shashank.sharma@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: <stable@vger.kernel.org> # v4.9+
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1485509961-9010-3-git-send-email-imre.deak@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_lspcon.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_lspcon.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_lspcon.c b/drivers/gpu/drm/i915/intel_lspcon.c index f6d4e6940257..c300647ef604 100644 --- a/drivers/gpu/drm/i915/intel_lspcon.c +++ b/drivers/gpu/drm/i915/intel_lspcon.c @@ -158,6 +158,8 @@ static bool lspcon_probe(struct intel_lspcon *lspcon) static void lspcon_resume_in_pcon_wa(struct intel_lspcon *lspcon) { struct intel_dp *intel_dp = lspcon_to_intel_dp(lspcon); + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); + struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev); unsigned long start = jiffies; if (!lspcon->desc_valid) @@ -173,7 +175,8 @@ static void lspcon_resume_in_pcon_wa(struct intel_lspcon *lspcon) if (!__intel_dp_read_desc(intel_dp, &desc)) return; - if (!memcmp(&intel_dp->desc, &desc, sizeof(desc))) { + if (intel_digital_port_connected(dev_priv, dig_port) && + !memcmp(&intel_dp->desc, &desc, sizeof(desc))) { DRM_DEBUG_KMS("LSPCON recovering in PCON mode after %u ms\n", jiffies_to_msecs(jiffies - start)); return; |