From patchwork Fri Jun 28 00:00:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Kasireddy, Vivek" X-Patchwork-Id: 11020851 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 10C5714C0 for ; Fri, 28 Jun 2019 00:01:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 02A29286BF for ; Fri, 28 Jun 2019 00:01:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E4CE0286C8; Fri, 28 Jun 2019 00:01:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 4B899286BF for ; Fri, 28 Jun 2019 00:01:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9C5476E857; Fri, 28 Jun 2019 00:01:05 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3AD216E857 for ; Fri, 28 Jun 2019 00:01:04 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 27 Jun 2019 17:01:03 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,425,1557212400"; d="scan'208";a="173312241" Received: from orsmsx106.amr.corp.intel.com ([10.22.225.133]) by orsmga002.jf.intel.com with ESMTP; 27 Jun 2019 17:01:03 -0700 Received: from orsmsx155.amr.corp.intel.com (10.22.240.21) by ORSMSX106.amr.corp.intel.com (10.22.225.133) with Microsoft SMTP Server (TLS) id 14.3.439.0; Thu, 27 Jun 2019 17:01:03 -0700 Received: from vkasired-desk2.fm.intel.com (10.22.254.138) by ORSMSX155.amr.corp.intel.com (10.22.240.21) with Microsoft SMTP Server (TLS) id 14.3.439.0; Thu, 27 Jun 2019 17:01:02 -0700 From: Vivek Kasireddy To: Date: Thu, 27 Jun 2019 17:00:01 -0700 Message-ID: <20190628000001.10497-1-vivek.kasireddy@intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190627125122.GZ5942@intel.com> References: <20190627125122.GZ5942@intel.com> MIME-Version: 1.0 X-Originating-IP: [10.22.254.138] Subject: [Intel-gfx] [PATCH] drm/i915/ehl: Add support for DPLL4 (v9) X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 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" X-Virus-Scanned: ClamAV using ClamSMTP This patch adds support for DPLL4 on EHL that include the following restrictions: - DPLL4 cannot be used with DDIA (combo port A internal eDP usage). DPLL4 can be used with other DDIs, including DDID (combo port A external usage). - DPLL4 cannot be enabled when DC5 or DC6 are enabled. - The DPLL4 enable, lock, power enabled, and power state are connected to the MGPLL1_ENABLE register. v2: (suggestions from Bob Paauwe) - Rework ehl_get_dpll() function to call intel_find_shared_dpll() and iterate twice: once for Combo plls and once for MG plls. - Use MG pll funcs for DPLL4 instead of creating new ones and modify mg_pll_enable to include the restrictions for EHL. v3: Fix compilation error v4: (suggestions from Lucas and Ville) - Treat DPLL4 as a combo phy PLL and not as MG PLL - Disable DC states when this DPLL is being enabled - Reuse icl_get_dpll instead of creating a separate one for EHL v5: (suggestion from Ville) - Refcount the DC OFF power domains during the enabling and disabling of this DPLL. v6: rebase v7: (suggestion from Imre) - Add a new power domain instead of iterating over the domains assoicated with DC OFF power well. v8: (Ville and Imre) - Rename POWER_DOMAIN_DPLL4 TO POWER_DOMAIN_DPLL_DC_OFF - Grab a reference in intel_modeset_setup_hw_state() if this DPLL was already enabled perhaps by BIOS. - Check for the port type instead of the encoder v9: (Ville) - Move the block of code that grabs a reference to the power domain POWER_DOMAIN_DPLL_DC_OFF to intel_modeset_readout_hw_state() to ensure that there is a reference present before this DPLL might get disabled. Cc: José Roberto de Souza Cc: Ville Syrjälä Cc: Matt Roper Cc: Imre Deak Signed-off-by: Vivek Kasireddy --- drivers/gpu/drm/i915/display/intel_display.c | 7 ++++ .../drm/i915/display/intel_display_power.c | 3 ++ .../drm/i915/display/intel_display_power.h | 1 + drivers/gpu/drm/i915/display/intel_dpll_mgr.c | 42 +++++++++++++++++-- drivers/gpu/drm/i915/display/intel_dpll_mgr.h | 6 +++ 5 files changed, 56 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index e55bd75528c1..3f1ff3bb5e36 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -16569,6 +16569,13 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev) pll->on = pll->info->funcs->get_hw_state(dev_priv, pll, &pll->state.hw_state); + + if (IS_ELKHARTLAKE(dev_priv) && pll->on && + pll->info->id == DPLL_ID_EHL_DPLL4) { + pll->wakeref = intel_display_power_get(dev_priv, + POWER_DOMAIN_DPLL_DC_OFF); + } + pll->state.crtc_mask = 0; for_each_intel_crtc(dev, crtc) { struct intel_crtc_state *crtc_state = diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c index c93ad512014c..1c101a842331 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.c +++ b/drivers/gpu/drm/i915/display/intel_display_power.c @@ -117,6 +117,8 @@ intel_display_power_domain_str(enum intel_display_power_domain domain) return "MODESET"; case POWER_DOMAIN_GT_IRQ: return "GT_IRQ"; + case POWER_DOMAIN_DPLL_DC_OFF: + return "DPLL_DC_OFF"; default: MISSING_CASE(domain); return "?"; @@ -2361,6 +2363,7 @@ void intel_display_power_put(struct drm_i915_private *dev_priv, ICL_PW_2_POWER_DOMAINS | \ BIT_ULL(POWER_DOMAIN_MODESET) | \ BIT_ULL(POWER_DOMAIN_AUX_A) | \ + BIT_ULL(POWER_DOMAIN_DPLL_DC_OFF) | \ BIT_ULL(POWER_DOMAIN_INIT)) #define ICL_DDI_IO_A_POWER_DOMAINS ( \ diff --git a/drivers/gpu/drm/i915/display/intel_display_power.h b/drivers/gpu/drm/i915/display/intel_display_power.h index ff57b0a7fe59..8f43f7051a16 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.h +++ b/drivers/gpu/drm/i915/display/intel_display_power.h @@ -59,6 +59,7 @@ enum intel_display_power_domain { POWER_DOMAIN_GMBUS, POWER_DOMAIN_MODESET, POWER_DOMAIN_GT_IRQ, + POWER_DOMAIN_DPLL_DC_OFF, POWER_DOMAIN_INIT, POWER_DOMAIN_NUM, diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c index 2d4e7b9a7b9d..81e1443cb583 100644 --- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c +++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c @@ -2806,6 +2806,10 @@ icl_get_dpll(struct intel_crtc_state *crtc_state, if (intel_port_is_combophy(dev_priv, port)) { min = DPLL_ID_ICL_DPLL0; max = DPLL_ID_ICL_DPLL1; + + if (IS_ELKHARTLAKE(dev_priv) && port != PORT_A) + max = DPLL_ID_EHL_DPLL4; + ret = icl_calc_dpll_state(crtc_state, encoder); } else if (intel_port_is_tc(dev_priv, port)) { if (encoder->type == INTEL_OUTPUT_DP_MST) { @@ -2945,8 +2949,14 @@ static bool combo_pll_get_hw_state(struct drm_i915_private *dev_priv, struct intel_shared_dpll *pll, struct intel_dpll_hw_state *hw_state) { - return icl_pll_get_hw_state(dev_priv, pll, hw_state, - CNL_DPLL_ENABLE(pll->info->id)); + i915_reg_t enable_reg = CNL_DPLL_ENABLE(pll->info->id); + + if (IS_ELKHARTLAKE(dev_priv) && + pll->info->id == DPLL_ID_EHL_DPLL4) { + enable_reg = MG_PLL_ENABLE(0); + } + + return icl_pll_get_hw_state(dev_priv, pll, hw_state, enable_reg); } static bool tbt_pll_get_hw_state(struct drm_i915_private *dev_priv, @@ -3057,6 +3067,19 @@ static void combo_pll_enable(struct drm_i915_private *dev_priv, { i915_reg_t enable_reg = CNL_DPLL_ENABLE(pll->info->id); + if (IS_ELKHARTLAKE(dev_priv) && + pll->info->id == DPLL_ID_EHL_DPLL4) { + enable_reg = MG_PLL_ENABLE(0); + + /* + * We need to disable DC states when this DPLL is enabled. + * This can be done by taking a reference on DPLL4 power + * domain. + */ + pll->wakeref = intel_display_power_get(dev_priv, + POWER_DOMAIN_DPLL_DC_OFF); + } + icl_pll_power_enable(dev_priv, pll, enable_reg); icl_dpll_write(dev_priv, pll); @@ -3152,7 +3175,19 @@ static void icl_pll_disable(struct drm_i915_private *dev_priv, static void combo_pll_disable(struct drm_i915_private *dev_priv, struct intel_shared_dpll *pll) { - icl_pll_disable(dev_priv, pll, CNL_DPLL_ENABLE(pll->info->id)); + i915_reg_t enable_reg = CNL_DPLL_ENABLE(pll->info->id); + + if (IS_ELKHARTLAKE(dev_priv) && + pll->info->id == DPLL_ID_EHL_DPLL4) { + enable_reg = MG_PLL_ENABLE(0); + icl_pll_disable(dev_priv, pll, enable_reg); + + intel_display_power_put(dev_priv, POWER_DOMAIN_DPLL_DC_OFF, + pll->wakeref); + return; + } + + icl_pll_disable(dev_priv, pll, enable_reg); } static void tbt_pll_disable(struct drm_i915_private *dev_priv, @@ -3230,6 +3265,7 @@ static const struct intel_dpll_mgr icl_pll_mgr = { static const struct dpll_info ehl_plls[] = { { "DPLL 0", &combo_pll_funcs, DPLL_ID_ICL_DPLL0, 0 }, { "DPLL 1", &combo_pll_funcs, DPLL_ID_ICL_DPLL1, 0 }, + { "DPLL 4", &combo_pll_funcs, DPLL_ID_EHL_DPLL4, 0 }, { }, }; diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.h b/drivers/gpu/drm/i915/display/intel_dpll_mgr.h index d0570414f3d1..3e2aa1099562 100644 --- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.h +++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.h @@ -28,6 +28,7 @@ #include #include "intel_display.h" +#include "intel_wakeref.h" /*FIXME: Move this to a more appropriate place. */ #define abs_diff(a, b) ({ \ @@ -117,6 +118,10 @@ enum intel_dpll_id { * @DPLL_ID_ICL_DPLL1: ICL combo PHY DPLL1 */ DPLL_ID_ICL_DPLL1 = 1, + /** + * @DPLL_ID_EHL_DPLL4: EHL combo PHY DPLL4 + */ + DPLL_ID_EHL_DPLL4 = 2, /** * @DPLL_ID_ICL_TBTPLL: ICL TBT PLL */ @@ -312,6 +317,7 @@ struct intel_shared_dpll { * @info: platform specific info */ const struct dpll_info *info; + intel_wakeref_t wakeref; }; #define SKL_DPLL0 0