From c02b8fb4073d1b9aa5af909a91b51056b819d946 Mon Sep 17 00:00:00 2001 From: Manasi Navare Date: Tue, 3 Oct 2017 16:37:25 -0700 Subject: [PATCH] drm/i915/edp: Increase the T12 delay quirk to 1300ms For this specific PCI device, the eDP panel requires a higher panel power cycle delay of 1300ms where the minimum spec requirement of panel power cycle delay is 500ms. This fix in combination with correct timestamp at which we get the panel power off time fixes the dP AUX CH timeouts seen on various IGT tests. 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 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101518 Cc: Daniel Vetter Cc: Jani Nikula Cc: Ville Syrjala Signed-off-by: Manasi Navare Acked-by: Daniel Vetter Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/1507073845-13420-2-git-send-email-manasi.d.navare@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 0fd41cdc68f16..ca48bce23a6f1 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -5286,7 +5286,7 @@ 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, 900 * 10); + vbt.t11_t12 = max_t(u16, vbt.t11_t12, 1300 * 10); DRM_DEBUG_KMS("Increasing T12 panel delay as per the quirk to %d\n", vbt.t11_t12); } -- 2.30.2