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From: Manasi Navare <manasi.d.navare@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>,
	Daniel Vetter <daniel.vetter@intel.com>
Subject: [PATCH] drm/i915/edp: Increase T12 panel delay to 900 ms to fix DP AUX CH timeouts
Date: Tue, 15 Aug 2017 11:59:51 -0700	[thread overview]
Message-ID: <1502823591-25310-1-git-send-email-manasi.d.navare@intel.com> (raw)

This patch fixes the DP AUX CH timeouts observed during CI runs causing
CI Failures on a specific PCI device. This issue was fixed previously
by adding a quirk but looks like we need to increase this delay even more
in order to get rid all the DP AUX CH timeouts.

Fixes: c99a259b4b5192ba ("drm/i915/edp: Add a T12 panel delay quirk to fix
DP AUX CH timeouts")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101144
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Cc: Clinton Taylor <clinton.a.taylor@intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 5ba8366..c4d8afa 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5246,7 +5246,7 @@ intel_dp_init_panel_power_sequencer(struct drm_device *dev,
 	 * seems sufficient to avoid this problem.
 	 */
 	if (dev_priv->quirks & QUIRK_INCREASE_T12_DELAY) {
-		vbt.t11_t12 = max_t(u16, vbt.t11_t12, 800 * 10);
+		vbt.t11_t12 = max_t(u16, vbt.t11_t12, 900 * 10);
 		DRM_DEBUG_KMS("Increasing T12 panel delay as per the quirk to %d\n",
 			      vbt.t11_t12);
 	}
-- 
2.1.4

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             reply	other threads:[~2017-08-15 18:52 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-15 18:59 Manasi Navare [this message]
2017-08-15 19:11 ` ✓ Fi.CI.BAT: success for drm/i915/edp: Increase T12 panel delay to 900 ms to fix DP AUX CH timeouts Patchwork
2017-08-16 19:35 ` [PATCH] " Manasi Navare
2017-08-16 21:19   ` Rodrigo Vivi
2017-08-16 22:54     ` Clint Taylor
2017-08-16 23:10       ` Manasi Navare
2017-08-31 18:46 ` Ville Syrjälä
2017-09-01  9:30   ` Saarinen, Jani
2017-09-05 11:56     ` Saarinen, Jani
2017-09-05 22:14       ` Rodrigo Vivi

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