From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paulo Zanoni Subject: [PATCH 12/36] drm/i915: wait only 35us for the FDI link training Date: Wed, 31 Oct 2012 18:12:31 -0200 Message-ID: <1351714375-15284-13-git-send-email-przanoni@gmail.com> References: <1351714375-15284-1-git-send-email-przanoni@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-gg0-f177.google.com (mail-gg0-f177.google.com [209.85.161.177]) by gabe.freedesktop.org (Postfix) with ESMTP id 0D0009ED90 for ; Wed, 31 Oct 2012 13:13:30 -0700 (PDT) Received: by mail-gg0-f177.google.com with SMTP id h1so348839gge.36 for ; Wed, 31 Oct 2012 13:13:30 -0700 (PDT) In-Reply-To: <1351714375-15284-1-git-send-email-przanoni@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: intel-gfx@lists.freedesktop.org Cc: Paulo Zanoni List-Id: intel-gfx@lists.freedesktop.org From: Paulo Zanoni First we wait 30us for the FDI receiver lane calibration, then we wait 5us for the FDI auto training time. Signed-off-by: Paulo Zanoni --- drivers/gpu/drm/i915/intel_ddi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 0239888..11b5809 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -203,7 +203,9 @@ void hsw_fdi_link_train(struct drm_crtc *crtc) rx_ctl_val |= FDI_RX_ENABLE | FDI_LINK_TRAIN_AUTO; I915_WRITE(_FDI_RXA_CTL, rx_ctl_val); POSTING_READ(_FDI_RXA_CTL); - udelay(100); + + /* Wait for FDI receiver lane calibration */ + udelay(30); /* Program FDI_RX_MISC pwrdn lanes */ temp = I915_READ(_FDI_RXA_MISC); @@ -211,6 +213,9 @@ void hsw_fdi_link_train(struct drm_crtc *crtc) I915_WRITE(_FDI_RXA_MISC, temp); POSTING_READ(_FDI_RXA_MISC); + /* Wait for FDI auto training time */ + udelay(5); + temp = I915_READ(DP_TP_STATUS(PORT_E)); if (temp & DP_TP_STATUS_AUTOTRAIN_DONE) { DRM_DEBUG_DRIVER("BUF_CTL training done on %d step\n", i); -- 1.7.11.4