From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eugeni Dodonov Subject: [PATCH 11/24] drm/i915: program WM_LINETIME on Haswell Date: Thu, 26 Apr 2012 15:21:06 -0300 Message-ID: <1335464479-648-12-git-send-email-eugeni.dodonov@intel.com> References: <1335464479-648-1-git-send-email-eugeni.dodonov@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTP id E16299E988 for ; Thu, 26 Apr 2012 11:21:47 -0700 (PDT) In-Reply-To: <1335464479-648-1-git-send-email-eugeni.dodonov@intel.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: Eugeni Dodonov List-Id: intel-gfx@lists.freedesktop.org The line time can be programmed according to the number of horizontal pixels vs effective pixel rate ratio. v2: improve comment as per Chris Wilson suggestion v3: incorporate latest changes in specs. Signed-off-by: Eugeni Dodonov --- drivers/gpu/drm/i915/intel_display.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index ea1ac15..8308da0 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4555,6 +4555,19 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc, (adjusted_mode->crtc_vsync_start - 1) | ((adjusted_mode->crtc_vsync_end - 1) << 16)); + if (IS_HASWELL(dev)) { + temp = I915_READ(PIPE_WM_LINETIME(pipe)); + temp &= ~PIPE_WM_LINETIME_MASK; + + /* The WM are computed with base on how long it takes to fill a single + * row at the given clock rate, multiplied by 8. + * */ + temp |= PIPE_WM_LINETIME_TIME( + ((adjusted_mode->crtc_hdisplay * 1000) / adjusted_mode->clock) * 8); + + I915_WRITE(PIPE_WM_LINETIME(pipe), temp); + } + /* pipesrc controls the size that is scaled from, which should * always be the user's requested size. */ -- 1.7.10