From patchwork Wed Jun 26 21:55:14 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rodrigo Vivi X-Patchwork-Id: 2788831 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 5A1CF9F245 for ; Wed, 26 Jun 2013 22:00:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3C7A920200 for ; Wed, 26 Jun 2013 22:00:41 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 10A7E20210 for ; Wed, 26 Jun 2013 22:00:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id ED24CE6248 for ; Wed, 26 Jun 2013 15:00:39 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mail-yh0-f44.google.com (mail-yh0-f44.google.com [209.85.213.44]) by gabe.freedesktop.org (Postfix) with ESMTP id 32FDFE5F3B; Wed, 26 Jun 2013 14:55:38 -0700 (PDT) Received: by mail-yh0-f44.google.com with SMTP id t59so1770yho.3 for ; Wed, 26 Jun 2013 14:55:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=5jU5sGNg2K1fOMHg6b07W9TuQEZYwq8oY3UMZxMEKQ4=; b=EzzoC+mK96CAFvTbUxxFc1Gr35hCHsB0OK6YVNsVtAITy/U61W9fDcL8oHz/o4zt2A GVgc/mxj00q0xjsHayXe56GAgVQssxZIqyAtemAe68VUmdRVpRK1ThRsqEopgiOBlFf9 GKTBLR/73x52HDI18fQsR17HANlJGfgR+Z1ROpfECKBbRyXDP1aoSS6yMc4hG1I6i4Uj 6QykchZtdprdoAPZXTV927WLBvk282dEe67dGe4A8loB+UWKKOLIbPuTZ/gjdeMtVlkq TYMXR/XwhdL9cCndNKh3CmA5VnbvB8NIZEqYvPGPDEMb5tJgoxwpc8xLUzyzuXVx+F2X +jEA== X-Received: by 10.236.118.206 with SMTP id l54mr3149786yhh.66.1372283737805; Wed, 26 Jun 2013 14:55:37 -0700 (PDT) Received: from localhost.localdomain ([186.204.164.107]) by mx.google.com with ESMTPSA id d91sm47861367yhq.16.2013.06.26.14.55.36 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Wed, 26 Jun 2013 14:55:37 -0700 (PDT) From: Rodrigo Vivi To: intel-gfx@lists.freedesktop.org Date: Wed, 26 Jun 2013 18:55:14 -0300 Message-Id: <1372283722-12988-3-git-send-email-rodrigo.vivi@gmail.com> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1372283722-12988-1-git-send-email-rodrigo.vivi@gmail.com> References: <1372283722-12988-1-git-send-email-rodrigo.vivi@gmail.com> Cc: dri-devel@lists.freedesktop.org Subject: [Intel-gfx] [PATCH 03/11] drm/i915: split aux_clock_divider logic in a separated function for reuse. X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: intel-gfx-bounces+patchwork-intel-gfx=patchwork.kernel.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+patchwork-intel-gfx=patchwork.kernel.org@lists.freedesktop.org X-Spam-Status: No, score=-5.4 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Prep patch for reuse aux_clock_divider with EDP_PSR_AUX_CTL setup. Reviewed-by: Paulo Zanoni Signed-off-by: Rodrigo Vivi --- drivers/gpu/drm/i915/intel_dp.c | 58 +++++++++++++++++++++++------------------ 1 file changed, 33 insertions(+), 25 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 709e9d9..5cd276b 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -271,29 +271,12 @@ intel_dp_aux_wait_done(struct intel_dp *intel_dp, bool has_aux_irq) return status; } -static int -intel_dp_aux_ch(struct intel_dp *intel_dp, - uint8_t *send, int send_bytes, - uint8_t *recv, int recv_size) +static uint32_t get_aux_clock_divider(struct intel_dp *intel_dp) { struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); struct drm_device *dev = intel_dig_port->base.base.dev; struct drm_i915_private *dev_priv = dev->dev_private; - uint32_t ch_ctl = intel_dp->aux_ch_ctl_reg; - uint32_t ch_data = ch_ctl + 4; - int i, ret, recv_bytes; - uint32_t status; - uint32_t aux_clock_divider; - int try, precharge; - bool has_aux_irq = INTEL_INFO(dev)->gen >= 5 && !IS_VALLEYVIEW(dev); - /* dp aux is extremely sensitive to irq latency, hence request the - * lowest possible wakeup latency and so prevent the cpu from going into - * deep sleep states. - */ - pm_qos_update_request(&dev_priv->pm_qos, 0); - - intel_dp_check_edp(intel_dp); /* The clock divider is based off the hrawclk, * and would like to run at 2MHz. So, take the * hrawclk value and divide by 2 and use that @@ -302,23 +285,48 @@ intel_dp_aux_ch(struct intel_dp *intel_dp, * clock divider. */ if (IS_VALLEYVIEW(dev)) { - aux_clock_divider = 100; + return 100; } else if (intel_dig_port->port == PORT_A) { if (HAS_DDI(dev)) - aux_clock_divider = DIV_ROUND_CLOSEST( + return DIV_ROUND_CLOSEST( intel_ddi_get_cdclk_freq(dev_priv), 2000); else if (IS_GEN6(dev) || IS_GEN7(dev)) - aux_clock_divider = 200; /* SNB & IVB eDP input clock at 400Mhz */ + return 200; /* SNB & IVB eDP input clock at 400Mhz */ else - aux_clock_divider = 225; /* eDP input clock at 450Mhz */ + return 225; /* eDP input clock at 450Mhz */ } else if (dev_priv->pch_id == INTEL_PCH_LPT_DEVICE_ID_TYPE) { /* Workaround for non-ULT HSW */ - aux_clock_divider = 74; + return 74; } else if (HAS_PCH_SPLIT(dev)) { - aux_clock_divider = DIV_ROUND_UP(intel_pch_rawclk(dev), 2); + return DIV_ROUND_UP(intel_pch_rawclk(dev), 2); } else { - aux_clock_divider = intel_hrawclk(dev) / 2; + return intel_hrawclk(dev) / 2; } +} + +static int +intel_dp_aux_ch(struct intel_dp *intel_dp, + uint8_t *send, int send_bytes, + uint8_t *recv, int recv_size) +{ + struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); + struct drm_device *dev = intel_dig_port->base.base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + uint32_t ch_ctl = intel_dp->aux_ch_ctl_reg; + uint32_t ch_data = ch_ctl + 4; + int i, ret, recv_bytes; + uint32_t status; + uint32_t aux_clock_divider = get_aux_clock_divider(intel_dp); + int try, precharge; + bool has_aux_irq = INTEL_INFO(dev)->gen >= 5 && !IS_VALLEYVIEW(dev); + + /* dp aux is extremely sensitive to irq latency, hence request the + * lowest possible wakeup latency and so prevent the cpu from going into + * deep sleep states. + */ + pm_qos_update_request(&dev_priv->pm_qos, 0); + + intel_dp_check_edp(intel_dp); if (IS_GEN6(dev)) precharge = 3;