From: Shashank Sharma <shashank.sharma@intel.com>
To: intel-gfx@lists.freedesktop.org, sonika.jindal@intel.com,
gary.c.wang@intel.com, shobhit.kumar@intel.com,
daniel.vetter@intel.com
Subject: [PATCH] drm/i915: Restrict usage of live status check
Date: Thu, 10 Mar 2016 17:05:47 +0530 [thread overview]
Message-ID: <1457609747-21577-1-git-send-email-shashank.sharma@intel.com> (raw)
This patch does the following:
- Restricts usage of live status check for HDMI detection.
While testing certain (monitor + cable) combinations with
various intel platforms, it seems that live status register
doesn't work reliably on some older devices. So limit the
live_status check for HDMI detection, only for platforms
from gen7 onwards.
- Cleans up the retry logic.
There is an extra 'if (try)' check, which can be avoided by
changing the logic slightly, keeping the delay as same(80ms)
Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
---
drivers/gpu/drm/i915/intel_hdmi.c | 23 +++++++++++++++--------
1 file changed, 15 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index e2dab48..3f6db91 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1397,24 +1397,31 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
enum drm_connector_status status;
struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
struct drm_i915_private *dev_priv = to_i915(connector->dev);
- bool live_status = false;
- unsigned int try;
+ bool live_status = true;
+ unsigned int try = 9;
DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
connector->base.id, connector->name);
intel_display_power_get(dev_priv, POWER_DOMAIN_GMBUS);
- for (try = 0; !live_status && try < 9; try++) {
- if (try)
- msleep(10);
+ /*
+ * When tested with specific set of monitors + cables,
+ * live status behavior is not very consistent for older
+ * platforms. So add live status check from GEN7
+ * onwards.
+ */
+ if (INTEL_INFO(dev_priv->dev)->gen >= 7) {
+retry_ls:
live_status = intel_digital_port_connected(dev_priv,
hdmi_to_dig_port(intel_hdmi));
+ if (!live_status && --try) {
+ msleep(10);
+ goto retry_ls;
+ }
+ DRM_DEBUG_KMS("Live status %s!\n", live_status ? "up" : "down");
}
- if (!live_status)
- DRM_DEBUG_KMS("Live status not up!");
-
intel_hdmi_unset_edid(connector);
if (intel_hdmi_set_edid(connector, live_status)) {
--
1.9.1
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next reply other threads:[~2016-03-10 11:26 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-10 11:35 Shashank Sharma [this message]
2016-03-10 11:40 ` [PATCH] drm/i915: Restrict usage of live status check Ville Syrjälä
2016-03-10 12:42 ` Sharma, Shashank
2016-03-10 13:07 ` Ville Syrjälä
2016-03-10 13:22 ` Sharma, Shashank
2016-03-10 12:27 ` ✗ Fi.CI.BAT: failure for " Patchwork
2016-03-10 14:50 ` Patchwork
2016-03-17 7:59 [PATCH] " Shashank Sharma
2016-03-17 9:25 ` Jani Nikula
2016-03-17 10:19 ` Sharma, Shashank
2016-03-17 13:04 ` Ville Syrjälä
2016-03-17 15:45 ` Sharma, Shashank
2016-03-17 15:57 ` Chris Wilson
2016-03-17 16:01 ` Ville Syrjälä
2016-03-17 16:05 ` Sharma, Shashank
2016-03-17 16:21 ` Ville Syrjälä
2016-03-17 16:33 ` Sharma, Shashank
2016-03-17 16:47 ` Ville Syrjälä
2016-03-18 3:21 ` Sharma, Shashank
2016-03-18 12:28 ` Ville Syrjälä
2016-03-17 17:59 ` Jani Nikula
2016-03-18 3:23 ` Sharma, Shashank
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