From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 57319C6FA82 for ; Mon, 26 Sep 2022 16:49:24 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D27BC10E475; Mon, 26 Sep 2022 16:49:23 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 061E710E475 for ; Mon, 26 Sep 2022 16:49:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664210959; x=1695746959; h=from:to:cc:subject:in-reply-to:references:date: message-id:mime-version; bh=e66efFjiH5gNWAcZSgr09xT9CLEYkgIz/xewAY6uO3E=; b=ea6mHoaiTFNUC8ZxJrTnO6aiYhUfHbWIWEcjVk/ohS9vwhbeYMdY8UY2 KFIaC1lLEyFPpgZTCXLzXKB0inScG2kZVzg+NghhQMGNwJIBLS63PlZj3 ph7XzdyQE57rrgycaLDbZ3a3cMt+IfeYl9NG+uqZHjMTk0xDkHwguDjr/ EFPFVSzbQ2u2TBnAK9H6Qv3hoyQBvVGHBpHsRYRviTM/nh3AWvgJaZHi6 Kxtd+Kky25+DckQDTQssES6nuKMx11FSLSoqhG35kUqxRca72FqQDyKX7 lR48OozqiGbYx3t1q66l5uBx9We/wnubhreA7RuVFPx4ASWFZyTgvTZdU Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="301062103" X-IronPort-AV: E=Sophos;i="5.93,346,1654585200"; d="scan'208";a="301062103" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 09:49:19 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10482"; a="866196430" X-IronPort-AV: E=Sophos;i="5.93,346,1654585200"; d="scan'208";a="866196430" Received: from lsabisze-mobl.ger.corp.intel.com (HELO localhost) ([10.252.59.243]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2022 09:49:18 -0700 From: Jani Nikula To: Khaled Almahallawy , intel-gfx@lists.freedesktop.org In-Reply-To: <20220916212512.9112-1-khaled.almahallawy@intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20220916063720.422321-1-khaled.almahallawy@intel.com> <20220916212512.9112-1-khaled.almahallawy@intel.com> Date: Mon, 26 Sep 2022 19:48:58 +0300 Message-ID: <871qry2i9x.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain Subject: Re: [Intel-gfx] [PATCH v2] drm/i915/display: Don't disable DDI/Transcoder when setting phy test pattern X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Fri, 16 Sep 2022, Khaled Almahallawy wrote: > Bspecs has updated recently to remove the restriction to disable > DDI/Transcoder before setting PHY test pattern. This update is to > address PHY compliance test failures observed on a port with LTTPR. > The issue is that when Transc. is disabled, the main link signals fed > to LTTPR will be dropped invalidating link training, which will affect > the quality of the phy test pattern when the transcoder is enabled again. And how about platforms prior to display 12? The requirement is still there AFAICT. BR, Jani. > > v2: Update commit message (Clint) > > Bspec: 50482 > Cc: Imre Deak > Cc: Clint Taylor > Cc: Or Cochvi > Tested-by: Khaled Almahallawy > --- > drivers/gpu/drm/i915/display/intel_dp.c | 59 ------------------------- > 1 file changed, 59 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c > index c9be61d2348e..2bf323f3f155 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp.c > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > @@ -3675,61 +3675,6 @@ static void intel_dp_phy_pattern_update(struct intel_dp *intel_dp, > } > } > > -static void > -intel_dp_autotest_phy_ddi_disable(struct intel_dp *intel_dp, > - const struct intel_crtc_state *crtc_state) > -{ > - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); > - struct drm_device *dev = dig_port->base.base.dev; > - struct drm_i915_private *dev_priv = to_i915(dev); > - struct intel_crtc *crtc = to_intel_crtc(dig_port->base.base.crtc); > - enum pipe pipe = crtc->pipe; > - u32 trans_ddi_func_ctl_value, trans_conf_value, dp_tp_ctl_value; > - > - trans_ddi_func_ctl_value = intel_de_read(dev_priv, > - TRANS_DDI_FUNC_CTL(pipe)); > - trans_conf_value = intel_de_read(dev_priv, PIPECONF(pipe)); > - dp_tp_ctl_value = intel_de_read(dev_priv, TGL_DP_TP_CTL(pipe)); > - > - trans_ddi_func_ctl_value &= ~(TRANS_DDI_FUNC_ENABLE | > - TGL_TRANS_DDI_PORT_MASK); > - trans_conf_value &= ~PIPECONF_ENABLE; > - dp_tp_ctl_value &= ~DP_TP_CTL_ENABLE; > - > - intel_de_write(dev_priv, PIPECONF(pipe), trans_conf_value); > - intel_de_write(dev_priv, TRANS_DDI_FUNC_CTL(pipe), > - trans_ddi_func_ctl_value); > - intel_de_write(dev_priv, TGL_DP_TP_CTL(pipe), dp_tp_ctl_value); > -} > - > -static void > -intel_dp_autotest_phy_ddi_enable(struct intel_dp *intel_dp, > - const struct intel_crtc_state *crtc_state) > -{ > - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); > - struct drm_device *dev = dig_port->base.base.dev; > - struct drm_i915_private *dev_priv = to_i915(dev); > - enum port port = dig_port->base.port; > - struct intel_crtc *crtc = to_intel_crtc(dig_port->base.base.crtc); > - enum pipe pipe = crtc->pipe; > - u32 trans_ddi_func_ctl_value, trans_conf_value, dp_tp_ctl_value; > - > - trans_ddi_func_ctl_value = intel_de_read(dev_priv, > - TRANS_DDI_FUNC_CTL(pipe)); > - trans_conf_value = intel_de_read(dev_priv, PIPECONF(pipe)); > - dp_tp_ctl_value = intel_de_read(dev_priv, TGL_DP_TP_CTL(pipe)); > - > - trans_ddi_func_ctl_value |= TRANS_DDI_FUNC_ENABLE | > - TGL_TRANS_DDI_SELECT_PORT(port); > - trans_conf_value |= PIPECONF_ENABLE; > - dp_tp_ctl_value |= DP_TP_CTL_ENABLE; > - > - intel_de_write(dev_priv, PIPECONF(pipe), trans_conf_value); > - intel_de_write(dev_priv, TGL_DP_TP_CTL(pipe), dp_tp_ctl_value); > - intel_de_write(dev_priv, TRANS_DDI_FUNC_CTL(pipe), > - trans_ddi_func_ctl_value); > -} > - > static void intel_dp_process_phy_request(struct intel_dp *intel_dp, > const struct intel_crtc_state *crtc_state) > { > @@ -3748,14 +3693,10 @@ static void intel_dp_process_phy_request(struct intel_dp *intel_dp, > intel_dp_get_adjust_train(intel_dp, crtc_state, DP_PHY_DPRX, > link_status); > > - intel_dp_autotest_phy_ddi_disable(intel_dp, crtc_state); > - > intel_dp_set_signal_levels(intel_dp, crtc_state, DP_PHY_DPRX); > > intel_dp_phy_pattern_update(intel_dp, crtc_state); > > - intel_dp_autotest_phy_ddi_enable(intel_dp, crtc_state); > - > drm_dp_dpcd_write(&intel_dp->aux, DP_TRAINING_LANE0_SET, > intel_dp->train_set, crtc_state->lane_count); -- Jani Nikula, Intel Open Source Graphics Center