From: Jesse Barnes <jbarnes@virtuousgeek.org>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH 3/8] drm/i915/dp: read more receiver capability bits on hotplug
Date: Fri, 1 Jul 2011 15:22:53 -0700 [thread overview]
Message-ID: <1309558978-4704-4-git-send-email-jbarnes@virtuousgeek.org> (raw)
In-Reply-To: <1309558978-4704-1-git-send-email-jbarnes@virtuousgeek.org>
When a hotplug event is received, we need to check the receiver cap bits
in case they've changed (as they might with a hub or chain config).
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
drivers/gpu/drm/i915/intel_dp.c | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 1132ecd..dcef7fd 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1525,6 +1525,8 @@ intel_dp_link_down(struct intel_dp *intel_dp)
static void
intel_dp_check_link_status(struct intel_dp *intel_dp)
{
+ int ret;
+
if (!intel_dp->base.base.crtc)
return;
@@ -1533,6 +1535,15 @@ intel_dp_check_link_status(struct intel_dp *intel_dp)
return;
}
+ /* Try to read receiver status if the link appears to be up */
+ ret = intel_dp_aux_native_read(intel_dp,
+ 0x000, intel_dp->dpcd,
+ sizeof (intel_dp->dpcd));
+ if (ret != sizeof(intel_dp->dpcd)) {
+ intel_dp_link_down(intel_dp);
+ return;
+ }
+
if (!intel_channel_eq_ok(intel_dp)) {
intel_dp_start_link_train(intel_dp);
intel_dp_complete_link_train(intel_dp);
--
1.7.4.1
next prev parent reply other threads:[~2011-07-01 22:23 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-01 22:22 [RFC] misc DP fixes/changes Jesse Barnes
2011-07-01 22:22 ` [PATCH 1/8] drm/i915/dp: retry link status read 3 times on failure Jesse Barnes
2011-07-01 23:41 ` Keith Packard
2011-07-01 23:47 ` Jesse Barnes
2011-07-06 4:27 ` Eric Anholt
2011-07-06 16:09 ` Jesse Barnes
2011-07-01 22:22 ` [PATCH 2/8] drm/i915/dp: use DP DPCD defines when looking at DPCD values Jesse Barnes
2011-07-01 23:43 ` Keith Packard
2011-07-01 22:22 ` Jesse Barnes [this message]
2011-07-01 23:45 ` [PATCH 3/8] drm/i915/dp: read more receiver capability bits on hotplug Keith Packard
2011-07-01 22:22 ` [PATCH 4/8] drm/i915/dp: try to read receiver capabilities 3 times when detecting Jesse Barnes
2011-07-01 23:45 ` Keith Packard
2011-07-01 22:22 ` [PATCH 5/8] drm/i915/dp: set DP DPMS mode to "on" in ->commit Jesse Barnes
2011-07-01 23:46 ` Keith Packard
2011-07-01 22:22 ` [PATCH 6/8] drm/i915/dp: clear DP encoder CRTC if the receiver disappears Jesse Barnes
2011-07-01 23:48 ` Keith Packard
2011-07-01 23:59 ` Jesse Barnes
2011-07-02 0:31 ` Keith Packard
2011-07-01 22:22 ` [PATCH 7/8] drm/i915/dp: rename dpms_mode to receiver_configured Jesse Barnes
2011-07-01 23:50 ` Keith Packard
2011-07-01 22:22 ` [PATCH 8/8] drm/i915/dp: clear receiver_configured when link training fails Jesse Barnes
2011-07-01 23:51 ` Keith Packard
2011-07-01 23:39 ` [RFC] misc DP fixes/changes Keith Packard
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