From patchwork Fri Mar 1 21:14:28 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jesse Barnes X-Patchwork-Id: 2204801 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by patchwork1.kernel.org (Postfix) with ESMTP id 659D53FCF6 for ; Fri, 1 Mar 2013 21:44:50 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 54793E5C52 for ; Fri, 1 Mar 2013 13:44:50 -0800 (PST) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from oproxy5-pub.bluehost.com (oproxy5-pub.bluehost.com [67.222.38.55]) by gabe.freedesktop.org (Postfix) with SMTP id 735F7E6391 for ; Fri, 1 Mar 2013 13:38:00 -0800 (PST) Received: (qmail 26597 invoked by uid 0); 1 Mar 2013 21:37:51 -0000 Received: from unknown (HELO box514.bluehost.com) (74.220.219.114) by cpoproxy2.bluehost.com with SMTP; 1 Mar 2013 21:37:51 -0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=virtuousgeek.org; s=default; h=References:In-Reply-To:Message-Id:Date:Subject:To:From; bh=NwluUJy3Kb3OvLXzJBPv/S7ORj5AzE9mRRjMoxMkjH8=; b=gvEoN3wGuXb+yRaHR6iDH4LNZXjuBwt0ZLSGH1+Bf30R6NE40HM/802L2ADwmddYxDQ1p7RaWutLxg+imcBoY2p/LXudV0Z9Su/aEbNKCME44IDwEDBexMeZMDyIpoNR; Received: from [67.161.37.189] (port=37647 helo=jbarnes-desktop.intel.com) by box514.bluehost.com with esmtpsa (TLSv1:CAMELLIA256-SHA:256) (Exim 4.80) (envelope-from ) id 1UBXHh-0005Ri-D3 for intel-gfx@lists.freedesktop.org; Fri, 01 Mar 2013 14:14:29 -0700 From: Jesse Barnes To: intel-gfx@lists.freedesktop.org Date: Fri, 1 Mar 2013 13:14:28 -0800 Message-Id: <1362172471-7643-26-git-send-email-jbarnes@virtuousgeek.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1362172471-7643-1-git-send-email-jbarnes@virtuousgeek.org> References: <1362172471-7643-1-git-send-email-jbarnes@virtuousgeek.org> X-Identified-User: {10642:box514.bluehost.com:virtuous:virtuousgeek.org} {sentby:smtp auth 67.161.37.189 authed with jbarnes@virtuousgeek.org} Subject: [Intel-gfx] [PATCH 25/28] drm/i915/dp: program VSwing and Preemphasis control settings on VLV 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 From: Pallavi G Program few Tx buffer Swing control settings through DPIO. Signed-off-by: Pallavi G Signed-off-by: Yogesh M Signed-off-by: Gajanan Bhat --- drivers/gpu/drm/i915/intel_dp.c | 114 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 112 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 68d238d..03340fd 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1527,7 +1527,9 @@ intel_dp_voltage_max(struct intel_dp *intel_dp) { struct drm_device *dev = intel_dp_to_dev(intel_dp); - if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) + if (IS_VALLEYVIEW(dev)) + return DP_TRAIN_VOLTAGE_SWING_1200; + else if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) return DP_TRAIN_VOLTAGE_SWING_800; else if (HAS_PCH_CPT(dev) && !is_cpu_edp(intel_dp)) return DP_TRAIN_VOLTAGE_SWING_1200; @@ -1552,7 +1554,19 @@ intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing) default: return DP_TRAIN_PRE_EMPHASIS_0; } - } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { + } else if (IS_VALLEYVIEW(dev)) { + switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { + case DP_TRAIN_VOLTAGE_SWING_400: + return DP_TRAIN_PRE_EMPHASIS_9_5; + case DP_TRAIN_VOLTAGE_SWING_600: + return DP_TRAIN_PRE_EMPHASIS_6; + case DP_TRAIN_VOLTAGE_SWING_800: + return DP_TRAIN_PRE_EMPHASIS_3_5; + case DP_TRAIN_VOLTAGE_SWING_1200: + default: + return DP_TRAIN_PRE_EMPHASIS_0; + } + } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) { switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { case DP_TRAIN_VOLTAGE_SWING_400: return DP_TRAIN_PRE_EMPHASIS_6; @@ -1577,15 +1591,111 @@ intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing) } } +static void vlv_set_vswing_pre_emphasis(struct intel_dp *intel_dp, uint8_t v, + uint8_t p) +{ + struct drm_device *dev = intel_dp_to_dev(intel_dp); + struct drm_i915_private *dev_priv = dev->dev_private; + unsigned long Demph_reg_value, Preemph_reg_value, + Uniqtranscale_reg_value; + switch (p) { + case DP_TRAIN_PRE_EMPHASIS_0: + Preemph_reg_value = 0x0004000; + switch (v) { + case DP_TRAIN_VOLTAGE_SWING_400: + Demph_reg_value = 0x2B405555; + Uniqtranscale_reg_value = 0x552AB83A; + break; + case DP_TRAIN_VOLTAGE_SWING_600: + Demph_reg_value = 0x2B404040; + Uniqtranscale_reg_value = 0x5548B83A; + break; + case DP_TRAIN_VOLTAGE_SWING_800: + Demph_reg_value = 0x2B245555; + Uniqtranscale_reg_value = 0x5560B83A; + break; + case DP_TRAIN_VOLTAGE_SWING_1200: + Demph_reg_value = 0x2B405555; + Uniqtranscale_reg_value = 0x5598DA3A; + break; + default: + return; + } + break; + case DP_TRAIN_PRE_EMPHASIS_3_5: + Preemph_reg_value = 0x0002000; + switch (v) { + case DP_TRAIN_VOLTAGE_SWING_400: + Demph_reg_value = 0x2B404040; + Uniqtranscale_reg_value = 0x5552B83A; + break; + case DP_TRAIN_VOLTAGE_SWING_600: + Demph_reg_value = 0x2B404848; + Uniqtranscale_reg_value = 0x5580B83A; + break; + case DP_TRAIN_VOLTAGE_SWING_800: + Demph_reg_value = 0x2B404040; + Uniqtranscale_reg_value = 0x55ADDA3A; + break; + default: + return; + } + break; + case DP_TRAIN_PRE_EMPHASIS_6: + Preemph_reg_value = 0x0000000; + switch (v) { + case DP_TRAIN_VOLTAGE_SWING_400: + Demph_reg_value = 0x2B305555; + Uniqtranscale_reg_value = 0x5570B83A; + break; + case DP_TRAIN_VOLTAGE_SWING_600: + Demph_reg_value = 0x2B2B4040; + Uniqtranscale_reg_value = 0x55ADDA3A; + break; + default: + return; + } + break; + case DP_TRAIN_PRE_EMPHASIS_9_5: + Preemph_reg_value = 0x0006000; + switch (v) { + case DP_TRAIN_VOLTAGE_SWING_400: + Demph_reg_value = 0x1B405555; + Uniqtranscale_reg_value = 0x55ADDA3A; + break; + default: + return; + } + break; + default: + return; + } + + /* eDP is only on port C */ + mutex_lock(&dev_priv->dpio_lock); + intel_dpio_write(dev_priv, 0x8494, 0x00000000); + intel_dpio_write(dev_priv, 0x8490, Demph_reg_value); + intel_dpio_write(dev_priv, 0x8488, Uniqtranscale_reg_value); + intel_dpio_write(dev_priv, 0x848c, 0x0C782040); + intel_dpio_write(dev_priv, 0x842c, 0x00030000); + intel_dpio_write(dev_priv, 0x8424, Preemph_reg_value); + intel_dpio_write(dev_priv, 0x8494, 0x80000000); + mutex_unlock(&dev_priv->dpio_lock); +} + static void intel_get_adjust_train(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) { + struct drm_device *dev = intel_dp_to_dev(intel_dp); uint8_t v = 0; uint8_t p = 0; int lane; uint8_t voltage_max; uint8_t preemph_max; + if (IS_VALLEYVIEW(dev)) + vlv_set_vswing_pre_emphasis(intel_dp, v, p); + for (lane = 0; lane < intel_dp->lane_count; lane++) { uint8_t this_v = drm_dp_get_adjust_request_voltage(link_status, lane); uint8_t this_p = drm_dp_get_adjust_request_pre_emphasis(link_status, lane);