From patchwork Fri Dec 11 07:29:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Airlie X-Patchwork-Id: 11967411 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.7 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3215C4167B for ; Fri, 11 Dec 2020 07:29:44 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 4F0F923B26 for ; Fri, 11 Dec 2020 07:29:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4F0F923B26 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BC5CD6EC67; Fri, 11 Dec 2020 07:29:39 +0000 (UTC) Received: from us-smtp-delivery-44.mimecast.com (us-smtp-delivery-44.mimecast.com [205.139.111.44]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7158A6EC8F for ; Fri, 11 Dec 2020 07:29:37 +0000 (UTC) Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-200-_TbAlfbyMci9pE17TK0o_w-1; Fri, 11 Dec 2020 02:29:34 -0500 X-MC-Unique: _TbAlfbyMci9pE17TK0o_w-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C6B9780ED8B for ; Fri, 11 Dec 2020 07:29:33 +0000 (UTC) Received: from dreadlord-bne-redhat-com.bne.redhat.com (unknown [10.64.32.209]) by smtp.corp.redhat.com (Postfix) with ESMTP id 36D7560862 for ; Fri, 11 Dec 2020 07:29:33 +0000 (UTC) From: Dave Airlie To: intel-gfx@lists.freedesktop.org Date: Fri, 11 Dec 2020 17:29:19 +1000 Message-Id: <20201211072922.19101-9-airlied@gmail.com> In-Reply-To: <20201211072922.19101-1-airlied@gmail.com> References: <20201211072922.19101-1-airlied@gmail.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=airlied@gmail.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: gmail.com Subject: [Intel-gfx] [PATCH 08/11] drm/i915: migrate hsw fdi code to new file. 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" From: Dave Airlie Daniel asked for this, but it's a bit messy and I'm not sure how best to clean it up yet. Signed-off-by: Dave Airlie --- drivers/gpu/drm/i915/display/intel_crt.c | 1 + drivers/gpu/drm/i915/display/intel_ddi.c | 151 +---------------------- drivers/gpu/drm/i915/display/intel_ddi.h | 14 ++- drivers/gpu/drm/i915/display/intel_fdi.c | 147 ++++++++++++++++++++++ drivers/gpu/drm/i915/display/intel_fdi.h | 3 + 5 files changed, 168 insertions(+), 148 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_crt.c b/drivers/gpu/drm/i915/display/intel_crt.c index 4934edd51cb0..077ebc7e6396 100644 --- a/drivers/gpu/drm/i915/display/intel_crt.c +++ b/drivers/gpu/drm/i915/display/intel_crt.c @@ -38,6 +38,7 @@ #include "intel_crt.h" #include "intel_ddi.h" #include "intel_display_types.h" +#include "intel_fdi.h" #include "intel_fifo_underrun.h" #include "intel_gmbus.h" #include "intel_hotplug.h" diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 6863236df1d0..2d903962f9dd 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -51,12 +51,6 @@ #include "intel_tc.h" #include "intel_vdsc.h" -struct ddi_buf_trans { - u32 trans1; /* balance leg enable, de-emph level */ - u32 trans2; /* vref sel, vswing */ - u8 i_boost; /* SKL: I_boost; valid: 0x0, 0x1, 0x3, 0x7 */ -}; - static const u8 index_to_dp_signal_levels[] = { [0] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0, [1] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1, @@ -1398,8 +1392,8 @@ static int intel_ddi_hdmi_level(struct intel_encoder *encoder, * values in advance. This function programs the correct values for * DP/eDP/FDI use cases. */ -static void intel_prepare_dp_ddi_buffers(struct intel_encoder *encoder, - const struct intel_crtc_state *crtc_state) +void intel_prepare_dp_ddi_buffers(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); u32 iboost_bit = 0; @@ -1461,8 +1455,8 @@ static void intel_prepare_hdmi_ddi_buffers(struct intel_encoder *encoder, ddi_translations[level].trans2); } -static void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv, - enum port port) +void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv, + enum port port) { if (IS_BROXTON(dev_priv)) { udelay(16); @@ -1490,7 +1484,7 @@ static void intel_wait_ddi_buf_active(struct drm_i915_private *dev_priv, port_name(port)); } -static u32 hsw_pll_to_ddi_pll_sel(const struct intel_shared_dpll *pll) +u32 hsw_pll_to_ddi_pll_sel(const struct intel_shared_dpll *pll) { switch (pll->info->id) { case DPLL_ID_WRPLL1: @@ -1550,141 +1544,6 @@ static u32 icl_pll_to_ddi_clk_sel(struct intel_encoder *encoder, } } -/* Starting with Haswell, different DDI ports can work in FDI mode for - * connection to the PCH-located connectors. For this, it is necessary to train - * both the DDI port and PCH receiver for the desired DDI buffer settings. - * - * The recommended port to work in FDI mode is DDI E, which we use here. Also, - * please note that when FDI mode is active on DDI E, it shares 2 lines with - * DDI A (which is used for eDP) - */ - -void hsw_fdi_link_train(struct intel_encoder *encoder, - const struct intel_crtc_state *crtc_state) -{ - struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); - struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); - u32 temp, i, rx_ctl_val, ddi_pll_sel; - - intel_prepare_dp_ddi_buffers(encoder, crtc_state); - - /* Set the FDI_RX_MISC pwrdn lanes and the 2 workarounds listed at the - * mode set "sequence for CRT port" document: - * - TP1 to TP2 time with the default value - * - FDI delay to 90h - * - * WaFDIAutoLinkSetTimingOverrride:hsw - */ - intel_de_write(dev_priv, FDI_RX_MISC(PIPE_A), - FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2) | FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90); - - /* Enable the PCH Receiver FDI PLL */ - rx_ctl_val = dev_priv->fdi_rx_config | FDI_RX_ENHANCE_FRAME_ENABLE | - FDI_RX_PLL_ENABLE | - FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes); - intel_de_write(dev_priv, FDI_RX_CTL(PIPE_A), rx_ctl_val); - intel_de_posting_read(dev_priv, FDI_RX_CTL(PIPE_A)); - udelay(220); - - /* Switch from Rawclk to PCDclk */ - rx_ctl_val |= FDI_PCDCLK; - intel_de_write(dev_priv, FDI_RX_CTL(PIPE_A), rx_ctl_val); - - /* Configure Port Clock Select */ - ddi_pll_sel = hsw_pll_to_ddi_pll_sel(crtc_state->shared_dpll); - intel_de_write(dev_priv, PORT_CLK_SEL(PORT_E), ddi_pll_sel); - drm_WARN_ON(&dev_priv->drm, ddi_pll_sel != PORT_CLK_SEL_SPLL); - - /* Start the training iterating through available voltages and emphasis, - * testing each value twice. */ - for (i = 0; i < ARRAY_SIZE(hsw_ddi_translations_fdi) * 2; i++) { - /* Configure DP_TP_CTL with auto-training */ - intel_de_write(dev_priv, DP_TP_CTL(PORT_E), - DP_TP_CTL_FDI_AUTOTRAIN | - DP_TP_CTL_ENHANCED_FRAME_ENABLE | - DP_TP_CTL_LINK_TRAIN_PAT1 | - DP_TP_CTL_ENABLE); - - /* Configure and enable DDI_BUF_CTL for DDI E with next voltage. - * DDI E does not support port reversal, the functionality is - * achieved on the PCH side in FDI_RX_CTL, so no need to set the - * port reversal bit */ - intel_de_write(dev_priv, DDI_BUF_CTL(PORT_E), - DDI_BUF_CTL_ENABLE | ((crtc_state->fdi_lanes - 1) << 1) | DDI_BUF_TRANS_SELECT(i / 2)); - intel_de_posting_read(dev_priv, DDI_BUF_CTL(PORT_E)); - - udelay(600); - - /* Program PCH FDI Receiver TU */ - intel_de_write(dev_priv, FDI_RX_TUSIZE1(PIPE_A), TU_SIZE(64)); - - /* Enable PCH FDI Receiver with auto-training */ - rx_ctl_val |= FDI_RX_ENABLE | FDI_LINK_TRAIN_AUTO; - intel_de_write(dev_priv, FDI_RX_CTL(PIPE_A), rx_ctl_val); - intel_de_posting_read(dev_priv, FDI_RX_CTL(PIPE_A)); - - /* Wait for FDI receiver lane calibration */ - udelay(30); - - /* Unset FDI_RX_MISC pwrdn lanes */ - temp = intel_de_read(dev_priv, FDI_RX_MISC(PIPE_A)); - temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK); - intel_de_write(dev_priv, FDI_RX_MISC(PIPE_A), temp); - intel_de_posting_read(dev_priv, FDI_RX_MISC(PIPE_A)); - - /* Wait for FDI auto training time */ - udelay(5); - - temp = intel_de_read(dev_priv, DP_TP_STATUS(PORT_E)); - if (temp & DP_TP_STATUS_AUTOTRAIN_DONE) { - drm_dbg_kms(&dev_priv->drm, - "FDI link training done on step %d\n", i); - break; - } - - /* - * Leave things enabled even if we failed to train FDI. - * Results in less fireworks from the state checker. - */ - if (i == ARRAY_SIZE(hsw_ddi_translations_fdi) * 2 - 1) { - drm_err(&dev_priv->drm, "FDI link training failed!\n"); - break; - } - - rx_ctl_val &= ~FDI_RX_ENABLE; - intel_de_write(dev_priv, FDI_RX_CTL(PIPE_A), rx_ctl_val); - intel_de_posting_read(dev_priv, FDI_RX_CTL(PIPE_A)); - - temp = intel_de_read(dev_priv, DDI_BUF_CTL(PORT_E)); - temp &= ~DDI_BUF_CTL_ENABLE; - intel_de_write(dev_priv, DDI_BUF_CTL(PORT_E), temp); - intel_de_posting_read(dev_priv, DDI_BUF_CTL(PORT_E)); - - /* Disable DP_TP_CTL and FDI_RX_CTL and retry */ - temp = intel_de_read(dev_priv, DP_TP_CTL(PORT_E)); - temp &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK); - temp |= DP_TP_CTL_LINK_TRAIN_PAT1; - intel_de_write(dev_priv, DP_TP_CTL(PORT_E), temp); - intel_de_posting_read(dev_priv, DP_TP_CTL(PORT_E)); - - intel_wait_ddi_buf_idle(dev_priv, PORT_E); - - /* Reset FDI_RX_MISC pwrdn lanes */ - temp = intel_de_read(dev_priv, FDI_RX_MISC(PIPE_A)); - temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK); - temp |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2); - intel_de_write(dev_priv, FDI_RX_MISC(PIPE_A), temp); - intel_de_posting_read(dev_priv, FDI_RX_MISC(PIPE_A)); - } - - /* Enable normal pixel sending for FDI */ - intel_de_write(dev_priv, DP_TP_CTL(PORT_E), - DP_TP_CTL_FDI_AUTOTRAIN | - DP_TP_CTL_LINK_TRAIN_NORMAL | - DP_TP_CTL_ENHANCED_FRAME_ENABLE | - DP_TP_CTL_ENABLE); -} - static void intel_ddi_init_dp_buf_reg(struct intel_encoder *encoder, const struct intel_crtc_state *crtc_state) { diff --git a/drivers/gpu/drm/i915/display/intel_ddi.h b/drivers/gpu/drm/i915/display/intel_ddi.h index dcc711cfe4fe..e42b6bd05e01 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.h +++ b/drivers/gpu/drm/i915/display/intel_ddi.h @@ -9,6 +9,12 @@ #include "intel_display.h" #include "i915_reg.h" +struct ddi_buf_trans { + u32 trans1; /* balance leg enable, de-emph level */ + u32 trans2; /* vref sel, vswing */ + u8 i_boost; /* SKL: I_boost; valid: 0x0, 0x1, 0x3, 0x7 */ +}; + struct drm_connector_state; struct drm_i915_private; struct intel_connector; @@ -17,6 +23,7 @@ struct intel_crtc_state; struct intel_dp; struct intel_dpll_hw_state; struct intel_encoder; +struct intel_shared_dpll; enum transcoder; i915_reg_t dp_tp_ctl_reg(struct intel_encoder *encoder, @@ -27,8 +34,11 @@ void intel_ddi_fdi_post_disable(struct intel_atomic_state *state, struct intel_encoder *intel_encoder, const struct intel_crtc_state *old_crtc_state, const struct drm_connector_state *old_conn_state); -void hsw_fdi_link_train(struct intel_encoder *encoder, - const struct intel_crtc_state *crtc_state); +u32 hsw_pll_to_ddi_pll_sel(const struct intel_shared_dpll *pll); +void intel_prepare_dp_ddi_buffers(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state); +void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv, + enum port port); void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port); bool intel_ddi_get_hw_state(struct intel_encoder *encoder, enum pipe *pipe); void intel_ddi_enable_transcoder_func(struct intel_encoder *encoder, diff --git a/drivers/gpu/drm/i915/display/intel_fdi.c b/drivers/gpu/drm/i915/display/intel_fdi.c index b2eb96ae10a2..0a97f9864e1c 100644 --- a/drivers/gpu/drm/i915/display/intel_fdi.c +++ b/drivers/gpu/drm/i915/display/intel_fdi.c @@ -5,6 +5,19 @@ #include "intel_atomic.h" #include "intel_display_types.h" #include "intel_fdi.h" +#include "intel_ddi.h" + +static const struct ddi_buf_trans hsw_ddi_translations_fdi[] = { + { 0x00FFFFFF, 0x0007000E, 0x0 }, + { 0x00D75FFF, 0x000F000A, 0x0 }, + { 0x00C30FFF, 0x00060006, 0x0 }, + { 0x00AAAFFF, 0x001E0000, 0x0 }, + { 0x00FFFFFF, 0x000F000A, 0x0 }, + { 0x00D75FFF, 0x00160004, 0x0 }, + { 0x00C30FFF, 0x001E0000, 0x0 }, + { 0x00FFFFFF, 0x00060006, 0x0 }, + { 0x00D75FFF, 0x001E0000, 0x0 }, +}; /* units of 100MHz */ static int pipe_required_fdi_lanes(struct intel_crtc_state *crtc_state) @@ -550,6 +563,140 @@ static void ivb_manual_fdi_link_train(struct intel_crtc *crtc, drm_dbg_kms(&dev_priv->drm, "FDI train done.\n"); } +/* Starting with Haswell, different DDI ports can work in FDI mode for + * connection to the PCH-located connectors. For this, it is necessary to train + * both the DDI port and PCH receiver for the desired DDI buffer settings. + * + * The recommended port to work in FDI mode is DDI E, which we use here. Also, + * please note that when FDI mode is active on DDI E, it shares 2 lines with + * DDI A (which is used for eDP) + */ +void hsw_fdi_link_train(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state) +{ + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + u32 temp, i, rx_ctl_val, ddi_pll_sel; + + intel_prepare_dp_ddi_buffers(encoder, crtc_state); + + /* Set the FDI_RX_MISC pwrdn lanes and the 2 workarounds listed at the + * mode set "sequence for CRT port" document: + * - TP1 to TP2 time with the default value + * - FDI delay to 90h + * + * WaFDIAutoLinkSetTimingOverrride:hsw + */ + intel_de_write(dev_priv, FDI_RX_MISC(PIPE_A), + FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2) | FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90); + + /* Enable the PCH Receiver FDI PLL */ + rx_ctl_val = dev_priv->fdi_rx_config | FDI_RX_ENHANCE_FRAME_ENABLE | + FDI_RX_PLL_ENABLE | + FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes); + intel_de_write(dev_priv, FDI_RX_CTL(PIPE_A), rx_ctl_val); + intel_de_posting_read(dev_priv, FDI_RX_CTL(PIPE_A)); + udelay(220); + + /* Switch from Rawclk to PCDclk */ + rx_ctl_val |= FDI_PCDCLK; + intel_de_write(dev_priv, FDI_RX_CTL(PIPE_A), rx_ctl_val); + + /* Configure Port Clock Select */ + ddi_pll_sel = hsw_pll_to_ddi_pll_sel(crtc_state->shared_dpll); + intel_de_write(dev_priv, PORT_CLK_SEL(PORT_E), ddi_pll_sel); + drm_WARN_ON(&dev_priv->drm, ddi_pll_sel != PORT_CLK_SEL_SPLL); + + /* Start the training iterating through available voltages and emphasis, + * testing each value twice. */ + for (i = 0; i < ARRAY_SIZE(hsw_ddi_translations_fdi) * 2; i++) { + /* Configure DP_TP_CTL with auto-training */ + intel_de_write(dev_priv, DP_TP_CTL(PORT_E), + DP_TP_CTL_FDI_AUTOTRAIN | + DP_TP_CTL_ENHANCED_FRAME_ENABLE | + DP_TP_CTL_LINK_TRAIN_PAT1 | + DP_TP_CTL_ENABLE); + + /* Configure and enable DDI_BUF_CTL for DDI E with next voltage. + * DDI E does not support port reversal, the functionality is + * achieved on the PCH side in FDI_RX_CTL, so no need to set the + * port reversal bit */ + intel_de_write(dev_priv, DDI_BUF_CTL(PORT_E), + DDI_BUF_CTL_ENABLE | ((crtc_state->fdi_lanes - 1) << 1) | DDI_BUF_TRANS_SELECT(i / 2)); + intel_de_posting_read(dev_priv, DDI_BUF_CTL(PORT_E)); + + udelay(600); + + /* Program PCH FDI Receiver TU */ + intel_de_write(dev_priv, FDI_RX_TUSIZE1(PIPE_A), TU_SIZE(64)); + + /* Enable PCH FDI Receiver with auto-training */ + rx_ctl_val |= FDI_RX_ENABLE | FDI_LINK_TRAIN_AUTO; + intel_de_write(dev_priv, FDI_RX_CTL(PIPE_A), rx_ctl_val); + intel_de_posting_read(dev_priv, FDI_RX_CTL(PIPE_A)); + + /* Wait for FDI receiver lane calibration */ + udelay(30); + + /* Unset FDI_RX_MISC pwrdn lanes */ + temp = intel_de_read(dev_priv, FDI_RX_MISC(PIPE_A)); + temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK); + intel_de_write(dev_priv, FDI_RX_MISC(PIPE_A), temp); + intel_de_posting_read(dev_priv, FDI_RX_MISC(PIPE_A)); + + /* Wait for FDI auto training time */ + udelay(5); + + temp = intel_de_read(dev_priv, DP_TP_STATUS(PORT_E)); + if (temp & DP_TP_STATUS_AUTOTRAIN_DONE) { + drm_dbg_kms(&dev_priv->drm, + "FDI link training done on step %d\n", i); + break; + } + + /* + * Leave things enabled even if we failed to train FDI. + * Results in less fireworks from the state checker. + */ + if (i == ARRAY_SIZE(hsw_ddi_translations_fdi) * 2 - 1) { + drm_err(&dev_priv->drm, "FDI link training failed!\n"); + break; + } + + rx_ctl_val &= ~FDI_RX_ENABLE; + intel_de_write(dev_priv, FDI_RX_CTL(PIPE_A), rx_ctl_val); + intel_de_posting_read(dev_priv, FDI_RX_CTL(PIPE_A)); + + temp = intel_de_read(dev_priv, DDI_BUF_CTL(PORT_E)); + temp &= ~DDI_BUF_CTL_ENABLE; + intel_de_write(dev_priv, DDI_BUF_CTL(PORT_E), temp); + intel_de_posting_read(dev_priv, DDI_BUF_CTL(PORT_E)); + + /* Disable DP_TP_CTL and FDI_RX_CTL and retry */ + temp = intel_de_read(dev_priv, DP_TP_CTL(PORT_E)); + temp &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK); + temp |= DP_TP_CTL_LINK_TRAIN_PAT1; + intel_de_write(dev_priv, DP_TP_CTL(PORT_E), temp); + intel_de_posting_read(dev_priv, DP_TP_CTL(PORT_E)); + + intel_wait_ddi_buf_idle(dev_priv, PORT_E); + + /* Reset FDI_RX_MISC pwrdn lanes */ + temp = intel_de_read(dev_priv, FDI_RX_MISC(PIPE_A)); + temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK); + temp |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2); + intel_de_write(dev_priv, FDI_RX_MISC(PIPE_A), temp); + intel_de_posting_read(dev_priv, FDI_RX_MISC(PIPE_A)); + } + + /* Enable normal pixel sending for FDI */ + intel_de_write(dev_priv, DP_TP_CTL(PORT_E), + DP_TP_CTL_FDI_AUTOTRAIN | + DP_TP_CTL_LINK_TRAIN_NORMAL | + DP_TP_CTL_ENHANCED_FRAME_ENABLE | + DP_TP_CTL_ENABLE); +} + void ilk_fdi_pll_enable(const struct intel_crtc_state *crtc_state) { struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->uapi.crtc); diff --git a/drivers/gpu/drm/i915/display/intel_fdi.h b/drivers/gpu/drm/i915/display/intel_fdi.h index 7441fb1ce370..3b8bab236bd7 100644 --- a/drivers/gpu/drm/i915/display/intel_fdi.h +++ b/drivers/gpu/drm/i915/display/intel_fdi.h @@ -8,6 +8,7 @@ struct intel_crtc; struct intel_crtc_state; +struct intel_encoder; #define I915_DISPLAY_CONFIG_RETRY 1 int ilk_fdi_compute_config(struct intel_crtc *intel_crtc, @@ -17,5 +18,7 @@ void ilk_fdi_disable(struct intel_crtc *crtc); void ilk_fdi_pll_disable(struct intel_crtc *intel_crtc); void ilk_fdi_pll_enable(const struct intel_crtc_state *crtc_state); void intel_fdi_init_hook(struct drm_i915_private *dev_priv); +void hsw_fdi_link_train(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state); #endif