From patchwork Tue Nov 24 10:42:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: You-Sheng Yang X-Patchwork-Id: 1405438 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.ubuntu.com (client-ip=91.189.94.19; helo=huckleberry.canonical.com; envelope-from=kernel-team-bounces@lists.ubuntu.com; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=canonical.com Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4CgLGn1tNRz9sVL; Tue, 24 Nov 2020 21:43:45 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.86_2) (envelope-from ) id 1khVnQ-000347-I8; Tue, 24 Nov 2020 10:43:40 +0000 Received: from mail-pg1-f173.google.com ([209.85.215.173]) by huckleberry.canonical.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1khVnO-0002zZ-Hd for kernel-team@lists.ubuntu.com; Tue, 24 Nov 2020 10:43:38 +0000 Received: by mail-pg1-f173.google.com with SMTP id s63so7234178pgc.8 for ; Tue, 24 Nov 2020 02:43:35 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=/ESASY2BREkhWILkXzTaQvi/MM1qabygAaaZhhK7F0U=; b=Y/x6hIYkEp1GMhQiwphdoRCEnjkXhlPD/QBYDypCP/2T2lJALGyZgRkF7W1C9+LEE9 xrguXBs6YRDAvhRgXbtsq6i3BKl8ilJMCztQK9ySuHc+Ur1xZoyyrbSDiS61YB+9GMOw /6MSN0qtYWpwqSr0p36etfFho3/VWkPGibfZS4vs4pdy57F4bZNtB+ELwa2jKaaa07+Y HT+XqMAK2lqaNM3+jlLYeoNXQ5iPxy3IZ4BJUg5UmxnS+QRP2WfRU9MlVYcreL7ozFrt 6TtpO6nDLm4b8+wSG9ew+tfuivxRad6ZZHRfGn207SE+rsLKXSGrS1mbQSV/dGqNl+C0 /aLg== X-Gm-Message-State: AOAM5332WMuLA0INRRgMNb1mihsLIMEZYq+Mzyzx75owGzK4j9Vi2ZRL rckUtfFKbOm8K/74b7jUmWhCTx5vgpCl/A== X-Google-Smtp-Source: ABdhPJwifX9goTQ2/NPrtOFRyWxz7Sl3vvlQU+SiRhcdrJUyxQ18M0F+ePEBJjFH75LyJl+sycbC3A== X-Received: by 2002:a62:248:0:b029:18c:992f:e407 with SMTP id 69-20020a6202480000b029018c992fe407mr3493972pfc.37.1606214613908; Tue, 24 Nov 2020 02:43:33 -0800 (PST) Received: from localhost (61-220-137-37.HINET-IP.hinet.net. [61.220.137.37]) by smtp.gmail.com with ESMTPSA id p127sm14418001pfp.93.2020.11.24.02.43.32 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Nov 2020 02:43:33 -0800 (PST) From: You-Sheng Yang To: kernel-team@lists.ubuntu.com Subject: [PATCH 07/38][SRU][G/H] drm/i915: Add {preemph,voltage}_max() vfuncs Date: Tue, 24 Nov 2020 18:42:42 +0800 Message-Id: <20201124104313.421860-8-vicamo.yang@canonical.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201124104313.421860-1-vicamo.yang@canonical.com> References: <20201124104313.421860-1-vicamo.yang@canonical.com> MIME-Version: 1.0 Received-SPF: pass client-ip=209.85.215.173; envelope-from=vicamo@gmail.com; helo=mail-pg1-f173.google.com X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" From: Ville Syrjälä BugLink: https://bugs.launchpad.net/bugs/1903969 Different platforms have different max vswing/preemph settings. Turn that into a pair vfuncs so we can decouple intel_dp.c and intel_ddi.c further. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20200512174145.3186-5-ville.syrjala@linux.intel.com Reviewed-by: Manasi Navare (cherry picked from commit 53de0a20c8cdfa4416a53818c822c68796e5f266) Signed-off-by: You-Sheng Yang --- drivers/gpu/drm/i915/display/intel_ddi.c | 21 ++---- drivers/gpu/drm/i915/display/intel_ddi.h | 3 - .../drm/i915/display/intel_display_types.h | 3 + drivers/gpu/drm/i915/display/intel_dp.c | 67 ++++++------------- drivers/gpu/drm/i915/display/intel_dp.h | 4 -- .../drm/i915/display/intel_dp_link_training.c | 20 +++++- 6 files changed, 49 insertions(+), 69 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 4607f00731bf..ebecc11ac9ba 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -2151,10 +2151,10 @@ static void bxt_ddi_vswing_sequence(struct intel_encoder *encoder, ddi_translations[level].deemphasis); } -u8 intel_ddi_dp_voltage_max(struct intel_encoder *encoder) +static u8 intel_ddi_dp_voltage_max(struct intel_dp *intel_dp) { + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base; struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); - struct intel_dp *intel_dp = enc_to_intel_dp(encoder); enum port port = encoder->port; enum phy phy = intel_port_to_phy(dev_priv, port); int n_entries; @@ -2208,19 +2208,9 @@ u8 intel_ddi_dp_voltage_max(struct intel_encoder *encoder) * used on all DDI platforms. Should that change we need to * rethink this code. */ -u8 intel_ddi_dp_pre_emphasis_max(struct intel_encoder *encoder, u8 voltage_swing) +static u8 intel_ddi_dp_preemph_max(struct intel_dp *intel_dp) { - switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { - case DP_TRAIN_VOLTAGE_SWING_LEVEL_0: - return DP_TRAIN_PRE_EMPH_LEVEL_3; - case DP_TRAIN_VOLTAGE_SWING_LEVEL_1: - return DP_TRAIN_PRE_EMPH_LEVEL_2; - case DP_TRAIN_VOLTAGE_SWING_LEVEL_2: - return DP_TRAIN_PRE_EMPH_LEVEL_1; - case DP_TRAIN_VOLTAGE_SWING_LEVEL_3: - default: - return DP_TRAIN_PRE_EMPH_LEVEL_0; - } + return DP_TRAIN_PRE_EMPH_LEVEL_3; } static void cnl_ddi_vswing_program(struct intel_encoder *encoder, @@ -4588,6 +4578,9 @@ intel_ddi_init_dp_connector(struct intel_digital_port *intel_dig_port) else intel_dig_port->dp.set_signal_levels = hsw_set_signal_levels; + intel_dig_port->dp.voltage_max = intel_ddi_dp_voltage_max; + intel_dig_port->dp.preemph_max = intel_ddi_dp_preemph_max; + if (INTEL_GEN(dev_priv) < 12) { intel_dig_port->dp.regs.dp_tp_ctl = DP_TP_CTL(port); intel_dig_port->dp.regs.dp_tp_status = DP_TP_STATUS(port); diff --git a/drivers/gpu/drm/i915/display/intel_ddi.h b/drivers/gpu/drm/i915/display/intel_ddi.h index fbdf8ddde486..077e9dbbe367 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.h +++ b/drivers/gpu/drm/i915/display/intel_ddi.h @@ -42,9 +42,6 @@ void intel_ddi_compute_min_voltage_level(struct drm_i915_private *dev_priv, struct intel_crtc_state *crtc_state); u32 bxt_signal_levels(struct intel_dp *intel_dp); u32 ddi_signal_levels(struct intel_dp *intel_dp); -u8 intel_ddi_dp_voltage_max(struct intel_encoder *encoder); -u8 intel_ddi_dp_pre_emphasis_max(struct intel_encoder *encoder, - u8 voltage_swing); int intel_ddi_toggle_hdcp_signalling(struct intel_encoder *intel_encoder, bool enable); void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder); diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 2bf3d4cb4ea9..eb07fb2337e0 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1373,6 +1373,9 @@ struct intel_dp { void (*set_idle_link_train)(struct intel_dp *intel_dp); void (*set_signal_levels)(struct intel_dp *intel_dp); + u8 (*preemph_max)(struct intel_dp *intel_dp); + u8 (*voltage_max)(struct intel_dp *intel_dp); + /* Displayport compliance testing */ struct intel_dp_compliance compliance; diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 933a768f7094..d9be3ef82f39 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -3984,58 +3984,24 @@ intel_dp_get_link_status(struct intel_dp *intel_dp, u8 link_status[DP_LINK_STATU DP_LINK_STATUS_SIZE) == DP_LINK_STATUS_SIZE; } -/* These are source-specific values. */ -u8 -intel_dp_voltage_max(struct intel_dp *intel_dp) +static u8 intel_dp_voltage_max_2(struct intel_dp *intel_dp) { - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); - struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base; - enum port port = encoder->port; + return DP_TRAIN_VOLTAGE_SWING_LEVEL_2; +} - if (HAS_DDI(dev_priv)) - return intel_ddi_dp_voltage_max(encoder); - else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv) || - (HAS_PCH_SPLIT(dev_priv) && port != PORT_A)) - return DP_TRAIN_VOLTAGE_SWING_LEVEL_3; - else - return DP_TRAIN_VOLTAGE_SWING_LEVEL_2; +static u8 intel_dp_voltage_max_3(struct intel_dp *intel_dp) +{ + return DP_TRAIN_VOLTAGE_SWING_LEVEL_3; } -u8 -intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, u8 voltage_swing) +static u8 intel_dp_pre_empemph_max_2(struct intel_dp *intel_dp) { - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); - struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base; - enum port port = encoder->port; + return DP_TRAIN_PRE_EMPH_LEVEL_2; +} - if (HAS_DDI(dev_priv)) { - return intel_ddi_dp_pre_emphasis_max(encoder, voltage_swing); - } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv) || - (HAS_PCH_SPLIT(dev_priv) && port != PORT_A)) { - switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { - case DP_TRAIN_VOLTAGE_SWING_LEVEL_0: - return DP_TRAIN_PRE_EMPH_LEVEL_3; - case DP_TRAIN_VOLTAGE_SWING_LEVEL_1: - return DP_TRAIN_PRE_EMPH_LEVEL_2; - case DP_TRAIN_VOLTAGE_SWING_LEVEL_2: - return DP_TRAIN_PRE_EMPH_LEVEL_1; - case DP_TRAIN_VOLTAGE_SWING_LEVEL_3: - default: - return DP_TRAIN_PRE_EMPH_LEVEL_0; - } - } else { - switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { - case DP_TRAIN_VOLTAGE_SWING_LEVEL_0: - return DP_TRAIN_PRE_EMPH_LEVEL_2; - case DP_TRAIN_VOLTAGE_SWING_LEVEL_1: - return DP_TRAIN_PRE_EMPH_LEVEL_2; - case DP_TRAIN_VOLTAGE_SWING_LEVEL_2: - return DP_TRAIN_PRE_EMPH_LEVEL_1; - case DP_TRAIN_VOLTAGE_SWING_LEVEL_3: - default: - return DP_TRAIN_PRE_EMPH_LEVEL_0; - } - } +static u8 intel_dp_pre_empemph_max_3(struct intel_dp *intel_dp) +{ + return DP_TRAIN_PRE_EMPH_LEVEL_3; } static void vlv_set_signal_levels(struct intel_dp *intel_dp) @@ -8349,6 +8315,15 @@ bool intel_dp_init(struct drm_i915_private *dev_priv, else intel_dig_port->dp.set_signal_levels = g4x_set_signal_levels; + if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv) || + (HAS_PCH_SPLIT(dev_priv) && port != PORT_A)) { + intel_dig_port->dp.preemph_max = intel_dp_pre_empemph_max_3; + intel_dig_port->dp.voltage_max = intel_dp_voltage_max_3; + } else { + intel_dig_port->dp.preemph_max = intel_dp_pre_empemph_max_2; + intel_dig_port->dp.voltage_max = intel_dp_voltage_max_2; + } + intel_dig_port->dp.output_reg = output_reg; intel_dig_port->max_lanes = 4; intel_dig_port->dp.regs.dp_tp_ctl = DP_TP_CTL(port); diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h index 1702959ca079..0a8950f744f6 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.h +++ b/drivers/gpu/drm/i915/display/intel_dp.h @@ -92,10 +92,6 @@ intel_dp_program_link_training_pattern(struct intel_dp *intel_dp, void intel_dp_set_signal_levels(struct intel_dp *intel_dp); void intel_dp_set_idle_link_train(struct intel_dp *intel_dp); -u8 -intel_dp_voltage_max(struct intel_dp *intel_dp); -u8 -intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, u8 voltage_swing); void intel_dp_compute_rate(struct intel_dp *intel_dp, int port_clock, u8 *link_bw, u8 *rate_select); bool intel_dp_source_supports_hbr2(struct intel_dp *intel_dp); diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c index e4f1843170b7..171d9e842fc0 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c @@ -34,6 +34,21 @@ intel_dp_dump_link_status(const u8 link_status[DP_LINK_STATUS_SIZE]) link_status[3], link_status[4], link_status[5]); } +static u8 dp_pre_emphasis_max(u8 voltage_swing) +{ + switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { + case DP_TRAIN_VOLTAGE_SWING_LEVEL_0: + return DP_TRAIN_PRE_EMPH_LEVEL_3; + case DP_TRAIN_VOLTAGE_SWING_LEVEL_1: + return DP_TRAIN_PRE_EMPH_LEVEL_2; + case DP_TRAIN_VOLTAGE_SWING_LEVEL_2: + return DP_TRAIN_PRE_EMPH_LEVEL_1; + case DP_TRAIN_VOLTAGE_SWING_LEVEL_3: + default: + return DP_TRAIN_PRE_EMPH_LEVEL_0; + } +} + void intel_dp_get_adjust_train(struct intel_dp *intel_dp, const u8 link_status[DP_LINK_STATUS_SIZE]) { @@ -53,11 +68,12 @@ void intel_dp_get_adjust_train(struct intel_dp *intel_dp, p = this_p; } - voltage_max = intel_dp_voltage_max(intel_dp); + voltage_max = intel_dp->voltage_max(intel_dp); if (v >= voltage_max) v = voltage_max | DP_TRAIN_MAX_SWING_REACHED; - preemph_max = intel_dp_pre_emphasis_max(intel_dp, v); + preemph_max = min(intel_dp->preemph_max(intel_dp), + dp_pre_emphasis_max(v)); if (p >= preemph_max) p = preemph_max | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;