From patchwork Thu May 9 05:31:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Manna, Animesh" X-Patchwork-Id: 13659461 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 8B364C25B77 for ; Thu, 9 May 2024 05:48:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 62AD610E1EA; Thu, 9 May 2024 05:47:57 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="fhaNJLIc"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3BC6810E1EA; Thu, 9 May 2024 05:47:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1715233676; x=1746769676; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=rAAQ/Bv0SupnonUN6TYGxUdm0eGFGlLczGW/wix8vNY=; b=fhaNJLIcoajhP1VVDqVDfyUukbREp9U9mKBiTMhYgtCImfJ7SOcU6Lx4 6TNxTw/gV4iGpuIynFYLpAd8bR/w5C1R/+HymjBLL8rZ9NGJ4mDHxeQKO dS7upvL446dlxq3BRnj9XWC9EcoFGM6FsNgNA0/xbNH7xRr0DUT09ihy3 6G9GnrJFkcvWHGK4ADgImJcQV/W1Pd0eVwd/NpS8xHJ5F7BPsjH72kwSo Yt7KWeO4J9MtlP8Tqa1nz+B0uJqP6sQCPDhdKz+83XLPEZj5u9R5fehBw IeUkCSlchalMJ0uSRTPoX08QxWW6DKQm8AW0twFE9Ufy4WDK9vJyqW0Sm g==; X-CSE-ConnectionGUID: m5ACrF9vTMmocmXwSBBtSw== X-CSE-MsgGUID: djNwhKRoQRqFcx1yvQ/rvQ== X-IronPort-AV: E=McAfee;i="6600,9927,11067"; a="28645987" X-IronPort-AV: E=Sophos;i="6.08,146,1712646000"; d="scan'208";a="28645987" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 May 2024 22:47:56 -0700 X-CSE-ConnectionGUID: K4JymzpbR1Oh00wRkwqF0g== X-CSE-MsgGUID: dmp+LimfSZG+sgC7mT0DmA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,146,1712646000"; d="scan'208";a="33817625" Received: from srr4-3-linux-101-amanna.iind.intel.com ([10.223.74.76]) by orviesa003.jf.intel.com with ESMTP; 08 May 2024 22:47:53 -0700 From: Animesh Manna To: intel-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org, jani.nikula@intel.com, jouni.hogander@intel.com, arun.r.murthy@intel.com, Animesh Manna Subject: [PATCH v4 2/6] drm/i915/alpm: Move alpm related code to a new file Date: Thu, 9 May 2024 11:01:51 +0530 Message-Id: <20240509053155.327071-3-animesh.manna@intel.com> X-Mailer: git-send-email 2.29.0 In-Reply-To: <20240509053155.327071-1-animesh.manna@intel.com> References: <20240509053155.327071-1-animesh.manna@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Move ALPM feature related code as it will be used for non-psr panel also thorugh LOBF feature. v1: Initial version. v2: Correct ordering in makefile. [Jani] Signed-off-by: Animesh Manna --- drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/display/intel_alpm.c | 292 ++++++++++++++++++++++ drivers/gpu/drm/i915/display/intel_alpm.h | 18 ++ drivers/gpu/drm/i915/display/intel_psr.c | 282 +-------------------- drivers/gpu/drm/xe/Makefile | 1 + 5 files changed, 315 insertions(+), 279 deletions(-) create mode 100644 drivers/gpu/drm/i915/display/intel_alpm.c create mode 100644 drivers/gpu/drm/i915/display/intel_alpm.h diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index 7cad944b825c..9a3f910ce4fd 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -243,6 +243,7 @@ i915-y += \ display/hsw_ips.o \ display/i9xx_plane.o \ display/i9xx_wm.o \ + display/intel_alpm.o \ display/intel_atomic.o \ display/intel_atomic_plane.o \ display/intel_audio.o \ diff --git a/drivers/gpu/drm/i915/display/intel_alpm.c b/drivers/gpu/drm/i915/display/intel_alpm.c new file mode 100644 index 000000000000..ee6c2a959f09 --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_alpm.c @@ -0,0 +1,292 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright 2024, Intel Corporation. + */ + +#include "intel_alpm.h" +#include "intel_crtc.h" +#include "intel_de.h" +#include "intel_display_types.h" +#include "intel_dp.h" +#include "intel_dp_aux.h" +#include "intel_psr_regs.h" + +/* + * See Bspec: 71632 for the table + * + * Silence_period = tSilence,Min + ((tSilence,Max - tSilence,Min) / 2) + * + * Half cycle duration: + * + * Link rates 1.62 - 4.32 and tLFPS_Cycle = 70 ns + * FLOOR( (Link Rate * tLFPS_Cycle) / (2 * 10) ) + * + * Link rates 5.4 - 8.1 + * PORT_ALPM_LFPS_CTL[ LFPS Cycle Count ] = 10 + * LFPS Period chosen is the mid-point of the min:max values from the table + * FLOOR( LFPS Period in Symbol clocks / + * (2 * PORT_ALPM_LFPS_CTL[ LFPS Cycle Count ]) ) + */ +static bool _lnl_get_silence_period_and_lfps_half_cycle(int link_rate, + int *silence_period, + int *lfps_half_cycle) +{ + switch (link_rate) { + case 162000: + *silence_period = 20; + *lfps_half_cycle = 5; + break; + case 216000: + *silence_period = 27; + *lfps_half_cycle = 7; + break; + case 243000: + *silence_period = 31; + *lfps_half_cycle = 8; + break; + case 270000: + *silence_period = 34; + *lfps_half_cycle = 9; + break; + case 324000: + *silence_period = 41; + *lfps_half_cycle = 11; + break; + case 432000: + *silence_period = 56; + *lfps_half_cycle = 15; + break; + case 540000: + *silence_period = 69; + *lfps_half_cycle = 12; + break; + case 648000: + *silence_period = 84; + *lfps_half_cycle = 15; + break; + case 675000: + *silence_period = 87; + *lfps_half_cycle = 15; + break; + case 810000: + *silence_period = 104; + *lfps_half_cycle = 19; + break; + default: + *silence_period = *lfps_half_cycle = -1; + return false; + } + return true; +} + +/* + * AUX-Less Wake Time = CEILING( ((PHY P2 to P0) + tLFPS_Period, Max+ + * tSilence, Max+ tPHY Establishment + tCDS) / tline) + * For the "PHY P2 to P0" latency see the PHY Power Control page + * (PHY P2 to P0) : https://gfxspecs.intel.com/Predator/Home/Index/68965 + * : 12 us + * The tLFPS_Period, Max term is 800ns + * The tSilence, Max term is 180ns + * The tPHY Establishment (a.k.a. t1) term is 50us + * The tCDS term is 1 or 2 times t2 + * t2 = Number ML_PHY_LOCK * tML_PHY_LOCK + * Number ML_PHY_LOCK = ( 7 + CEILING( 6.5us / tML_PHY_LOCK ) + 1) + * Rounding up the 6.5us padding to the next ML_PHY_LOCK boundary and + * adding the "+ 1" term ensures all ML_PHY_LOCK sequences that start + * within the CDS period complete within the CDS period regardless of + * entry into the period + * tML_PHY_LOCK = TPS4 Length * ( 10 / (Link Rate in MHz) ) + * TPS4 Length = 252 Symbols + */ +static int _lnl_compute_aux_less_wake_time(int port_clock) +{ + int tphy2_p2_to_p0 = 12 * 1000; + int tlfps_period_max = 800; + int tsilence_max = 180; + int t1 = 50 * 1000; + int tps4 = 252; + int tml_phy_lock = 1000 * 1000 * tps4 * 10 / port_clock; + int num_ml_phy_lock = 7 + DIV_ROUND_UP(6500, tml_phy_lock) + 1; + int t2 = num_ml_phy_lock * tml_phy_lock; + int tcds = 1 * t2; + + return DIV_ROUND_UP(tphy2_p2_to_p0 + tlfps_period_max + tsilence_max + + t1 + tcds, 1000); +} + +static int _lnl_compute_aux_less_alpm_params(struct intel_dp *intel_dp, + struct intel_crtc_state *crtc_state) +{ + struct drm_i915_private *i915 = dp_to_i915(intel_dp); + int aux_less_wake_time, aux_less_wake_lines, silence_period, + lfps_half_cycle; + + aux_less_wake_time = + _lnl_compute_aux_less_wake_time(crtc_state->port_clock); + aux_less_wake_lines = intel_usecs_to_scanlines(&crtc_state->hw.adjusted_mode, + aux_less_wake_time); + + if (!_lnl_get_silence_period_and_lfps_half_cycle(crtc_state->port_clock, + &silence_period, + &lfps_half_cycle)) + return false; + + if (aux_less_wake_lines > ALPM_CTL_AUX_LESS_WAKE_TIME_MASK || + silence_period > PORT_ALPM_CTL_SILENCE_PERIOD_MASK || + lfps_half_cycle > PORT_ALPM_LFPS_CTL_LAST_LFPS_HALF_CYCLE_DURATION_MASK) + return false; + + if (i915->display.params.psr_safest_params) + aux_less_wake_lines = ALPM_CTL_AUX_LESS_WAKE_TIME_MASK; + + intel_dp->alpm_parameters.fast_wake_lines = aux_less_wake_lines; + intel_dp->alpm_parameters.silence_period_sym_clocks = silence_period; + intel_dp->alpm_parameters.lfps_half_cycle_num_of_syms = lfps_half_cycle; + + return true; +} + +static bool _lnl_compute_alpm_params(struct intel_dp *intel_dp, + struct intel_crtc_state *crtc_state) +{ + struct drm_i915_private *i915 = dp_to_i915(intel_dp); + int check_entry_lines; + + if (DISPLAY_VER(i915) < 20) + return true; + + /* ALPM Entry Check = 2 + CEILING( 5us /tline ) */ + check_entry_lines = 2 + + intel_usecs_to_scanlines(&crtc_state->hw.adjusted_mode, 5); + + if (check_entry_lines > 15) + return false; + + if (!_lnl_compute_aux_less_alpm_params(intel_dp, crtc_state)) + return false; + + if (i915->display.params.psr_safest_params) + check_entry_lines = 15; + + intel_dp->alpm_parameters.check_entry_lines = check_entry_lines; + + return true; +} + +/* + * IO wake time for DISPLAY_VER < 12 is not directly mentioned in Bspec. There + * are 50 us io wake time and 32 us fast wake time. Clearly preharge pulses are + * not (improperly) included in 32 us fast wake time. 50 us - 32 us = 18 us. + */ +static int skl_io_buffer_wake_time(void) +{ + return 18; +} + +static int tgl_io_buffer_wake_time(void) +{ + return 10; +} + +static int io_buffer_wake_time(const struct intel_crtc_state *crtc_state) +{ + struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev); + + if (DISPLAY_VER(i915) >= 12) + return tgl_io_buffer_wake_time(); + else + return skl_io_buffer_wake_time(); +} + +bool intel_alpm_compute_params(struct intel_dp *intel_dp, + struct intel_crtc_state *crtc_state) +{ + struct drm_i915_private *i915 = dp_to_i915(intel_dp); + int io_wake_lines, io_wake_time, fast_wake_lines, fast_wake_time; + int tfw_exit_latency = 20; /* eDP spec */ + int phy_wake = 4; /* eDP spec */ + int preamble = 8; /* eDP spec */ + int precharge = intel_dp_aux_fw_sync_len() - preamble; + u8 max_wake_lines; + + io_wake_time = max(precharge, io_buffer_wake_time(crtc_state)) + + preamble + phy_wake + tfw_exit_latency; + fast_wake_time = precharge + preamble + phy_wake + + tfw_exit_latency; + + if (DISPLAY_VER(i915) >= 12) + /* TODO: Check how we can use ALPM_CTL fast wake extended field */ + max_wake_lines = 12; + else + max_wake_lines = 8; + + io_wake_lines = intel_usecs_to_scanlines( + &crtc_state->hw.adjusted_mode, io_wake_time); + fast_wake_lines = intel_usecs_to_scanlines( + &crtc_state->hw.adjusted_mode, fast_wake_time); + + if (io_wake_lines > max_wake_lines || + fast_wake_lines > max_wake_lines) + return false; + + if (!_lnl_compute_alpm_params(intel_dp, crtc_state)) + return false; + + if (i915->display.params.psr_safest_params) + io_wake_lines = fast_wake_lines = max_wake_lines; + + /* According to Bspec lower limit should be set as 7 lines. */ + intel_dp->alpm_parameters.io_wake_lines = max(io_wake_lines, 7); + intel_dp->alpm_parameters.fast_wake_lines = max(fast_wake_lines, 7); + + return true; +} + +static void lnl_alpm_configure(struct intel_dp *intel_dp) +{ + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); + enum transcoder cpu_transcoder = intel_dp->psr.transcoder; + u32 alpm_ctl; + + if (DISPLAY_VER(dev_priv) < 20 || (!intel_dp->psr.psr2_enabled && + !intel_dp_is_edp(intel_dp))) + return; + + /* + * Panel Replay on eDP is always using ALPM aux less. I.e. no need to + * check panel support at this point. + */ + if (intel_dp->psr.panel_replay_enabled && intel_dp_is_edp(intel_dp)) { + alpm_ctl = ALPM_CTL_ALPM_ENABLE | + ALPM_CTL_ALPM_AUX_LESS_ENABLE | + ALPM_CTL_AUX_LESS_SLEEP_HOLD_TIME_50_SYMBOLS; + + intel_de_write(dev_priv, PORT_ALPM_CTL(dev_priv, cpu_transcoder), + PORT_ALPM_CTL_ALPM_AUX_LESS_ENABLE | + PORT_ALPM_CTL_MAX_PHY_SWING_SETUP(15) | + PORT_ALPM_CTL_MAX_PHY_SWING_HOLD(0) | + PORT_ALPM_CTL_SILENCE_PERIOD( + intel_dp->alpm_parameters.silence_period_sym_clocks)); + + intel_de_write(dev_priv, PORT_ALPM_LFPS_CTL(dev_priv, cpu_transcoder), + PORT_ALPM_LFPS_CTL_LFPS_CYCLE_COUNT(10) | + PORT_ALPM_LFPS_CTL_LFPS_HALF_CYCLE_DURATION( + intel_dp->alpm_parameters.lfps_half_cycle_num_of_syms) | + PORT_ALPM_LFPS_CTL_FIRST_LFPS_HALF_CYCLE_DURATION( + intel_dp->alpm_parameters.lfps_half_cycle_num_of_syms) | + PORT_ALPM_LFPS_CTL_LAST_LFPS_HALF_CYCLE_DURATION( + intel_dp->alpm_parameters.lfps_half_cycle_num_of_syms)); + } else { + alpm_ctl = ALPM_CTL_EXTENDED_FAST_WAKE_ENABLE | + ALPM_CTL_EXTENDED_FAST_WAKE_TIME(intel_dp->alpm_parameters.fast_wake_lines); + } + + alpm_ctl |= ALPM_CTL_ALPM_ENTRY_CHECK(intel_dp->alpm_parameters.check_entry_lines); + + intel_de_write(dev_priv, ALPM_CTL(dev_priv, cpu_transcoder), alpm_ctl); +} + +void intel_alpm_configure(struct intel_dp *intel_dp) +{ + lnl_alpm_configure(intel_dp); +} diff --git a/drivers/gpu/drm/i915/display/intel_alpm.h b/drivers/gpu/drm/i915/display/intel_alpm.h new file mode 100644 index 000000000000..c45d078e5a6b --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_alpm.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: MIT + * + * Copyright © 2024 Intel Corporation + */ + +#ifndef _INTEL_ALPM_H +#define _INTEL_ALPM_H + +#include + +struct intel_dp; +struct intel_crtc_state; + +bool intel_alpm_compute_params(struct intel_dp *intel_dp, + struct intel_crtc_state *crtc_state); +void intel_alpm_configure(struct intel_dp *intel_dp); + +#endif diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index 13c0f44f48b9..9e89844e6418 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -27,6 +27,7 @@ #include "i915_drv.h" #include "i915_reg.h" +#include "intel_alpm.h" #include "intel_atomic.h" #include "intel_crtc.h" #include "intel_ddi.h" @@ -1166,237 +1167,6 @@ static bool _compute_psr2_sdp_prior_scanline_indication(struct intel_dp *intel_d return true; } -/* - * See Bspec: 71632 for the table - * - * Silence_period = tSilence,Min + ((tSilence,Max - tSilence,Min) / 2) - * - * Half cycle duration: - * - * Link rates 1.62 - 4.32 and tLFPS_Cycle = 70 ns - * FLOOR( (Link Rate * tLFPS_Cycle) / (2 * 10) ) - * - * Link rates 5.4 - 8.1 - * PORT_ALPM_LFPS_CTL[ LFPS Cycle Count ] = 10 - * LFPS Period chosen is the mid-point of the min:max values from the table - * FLOOR( LFPS Period in Symbol clocks / - * (2 * PORT_ALPM_LFPS_CTL[ LFPS Cycle Count ]) ) - */ -static bool _lnl_get_silence_period_and_lfps_half_cycle(int link_rate, - int *silence_period, - int *lfps_half_cycle) -{ - switch (link_rate) { - case 162000: - *silence_period = 20; - *lfps_half_cycle = 5; - break; - case 216000: - *silence_period = 27; - *lfps_half_cycle = 7; - break; - case 243000: - *silence_period = 31; - *lfps_half_cycle = 8; - break; - case 270000: - *silence_period = 34; - *lfps_half_cycle = 9; - break; - case 324000: - *silence_period = 41; - *lfps_half_cycle = 11; - break; - case 432000: - *silence_period = 56; - *lfps_half_cycle = 15; - break; - case 540000: - *silence_period = 69; - *lfps_half_cycle = 12; - break; - case 648000: - *silence_period = 84; - *lfps_half_cycle = 15; - break; - case 675000: - *silence_period = 87; - *lfps_half_cycle = 15; - break; - case 810000: - *silence_period = 104; - *lfps_half_cycle = 19; - break; - default: - *silence_period = *lfps_half_cycle = -1; - return false; - } - return true; -} - -/* - * AUX-Less Wake Time = CEILING( ((PHY P2 to P0) + tLFPS_Period, Max+ - * tSilence, Max+ tPHY Establishment + tCDS) / tline) - * For the "PHY P2 to P0" latency see the PHY Power Control page - * (PHY P2 to P0) : https://gfxspecs.intel.com/Predator/Home/Index/68965 - * : 12 us - * The tLFPS_Period, Max term is 800ns - * The tSilence, Max term is 180ns - * The tPHY Establishment (a.k.a. t1) term is 50us - * The tCDS term is 1 or 2 times t2 - * t2 = Number ML_PHY_LOCK * tML_PHY_LOCK - * Number ML_PHY_LOCK = ( 7 + CEILING( 6.5us / tML_PHY_LOCK ) + 1) - * Rounding up the 6.5us padding to the next ML_PHY_LOCK boundary and - * adding the "+ 1" term ensures all ML_PHY_LOCK sequences that start - * within the CDS period complete within the CDS period regardless of - * entry into the period - * tML_PHY_LOCK = TPS4 Length * ( 10 / (Link Rate in MHz) ) - * TPS4 Length = 252 Symbols - */ -static int _lnl_compute_aux_less_wake_time(int port_clock) -{ - int tphy2_p2_to_p0 = 12 * 1000; - int tlfps_period_max = 800; - int tsilence_max = 180; - int t1 = 50 * 1000; - int tps4 = 252; - int tml_phy_lock = 1000 * 1000 * tps4 * 10 / port_clock; - int num_ml_phy_lock = 7 + DIV_ROUND_UP(6500, tml_phy_lock) + 1; - int t2 = num_ml_phy_lock * tml_phy_lock; - int tcds = 1 * t2; - - return DIV_ROUND_UP(tphy2_p2_to_p0 + tlfps_period_max + tsilence_max + - t1 + tcds, 1000); -} - -static int _lnl_compute_aux_less_alpm_params(struct intel_dp *intel_dp, - struct intel_crtc_state *crtc_state) -{ - struct drm_i915_private *i915 = dp_to_i915(intel_dp); - int aux_less_wake_time, aux_less_wake_lines, silence_period, - lfps_half_cycle; - - aux_less_wake_time = - _lnl_compute_aux_less_wake_time(crtc_state->port_clock); - aux_less_wake_lines = intel_usecs_to_scanlines(&crtc_state->hw.adjusted_mode, - aux_less_wake_time); - - if (!_lnl_get_silence_period_and_lfps_half_cycle(crtc_state->port_clock, - &silence_period, - &lfps_half_cycle)) - return false; - - if (aux_less_wake_lines > ALPM_CTL_AUX_LESS_WAKE_TIME_MASK || - silence_period > PORT_ALPM_CTL_SILENCE_PERIOD_MASK || - lfps_half_cycle > PORT_ALPM_LFPS_CTL_LAST_LFPS_HALF_CYCLE_DURATION_MASK) - return false; - - if (i915->display.params.psr_safest_params) - aux_less_wake_lines = ALPM_CTL_AUX_LESS_WAKE_TIME_MASK; - - intel_dp->alpm_parameters.fast_wake_lines = aux_less_wake_lines; - intel_dp->alpm_parameters.silence_period_sym_clocks = silence_period; - intel_dp->alpm_parameters.lfps_half_cycle_num_of_syms = lfps_half_cycle; - - return true; -} - -static bool _lnl_compute_alpm_params(struct intel_dp *intel_dp, - struct intel_crtc_state *crtc_state) -{ - struct drm_i915_private *i915 = dp_to_i915(intel_dp); - int check_entry_lines; - - if (DISPLAY_VER(i915) < 20) - return true; - - /* ALPM Entry Check = 2 + CEILING( 5us /tline ) */ - check_entry_lines = 2 + - intel_usecs_to_scanlines(&crtc_state->hw.adjusted_mode, 5); - - if (check_entry_lines > 15) - return false; - - if (!_lnl_compute_aux_less_alpm_params(intel_dp, crtc_state)) - return false; - - if (i915->display.params.psr_safest_params) - check_entry_lines = 15; - - intel_dp->alpm_parameters.check_entry_lines = check_entry_lines; - - return true; -} - -/* - * IO wake time for DISPLAY_VER < 12 is not directly mentioned in Bspec. There - * are 50 us io wake time and 32 us fast wake time. Clearly preharge pulses are - * not (improperly) included in 32 us fast wake time. 50 us - 32 us = 18 us. - */ -static int skl_io_buffer_wake_time(void) -{ - return 18; -} - -static int tgl_io_buffer_wake_time(void) -{ - return 10; -} - -static int io_buffer_wake_time(const struct intel_crtc_state *crtc_state) -{ - struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev); - - if (DISPLAY_VER(i915) >= 12) - return tgl_io_buffer_wake_time(); - else - return skl_io_buffer_wake_time(); -} - -static bool _compute_alpm_params(struct intel_dp *intel_dp, - struct intel_crtc_state *crtc_state) -{ - struct drm_i915_private *i915 = dp_to_i915(intel_dp); - int io_wake_lines, io_wake_time, fast_wake_lines, fast_wake_time; - int tfw_exit_latency = 20; /* eDP spec */ - int phy_wake = 4; /* eDP spec */ - int preamble = 8; /* eDP spec */ - int precharge = intel_dp_aux_fw_sync_len() - preamble; - u8 max_wake_lines; - - io_wake_time = max(precharge, io_buffer_wake_time(crtc_state)) + - preamble + phy_wake + tfw_exit_latency; - fast_wake_time = precharge + preamble + phy_wake + - tfw_exit_latency; - - if (DISPLAY_VER(i915) >= 12) - /* TODO: Check how we can use ALPM_CTL fast wake extended field */ - max_wake_lines = 12; - else - max_wake_lines = 8; - - io_wake_lines = intel_usecs_to_scanlines( - &crtc_state->hw.adjusted_mode, io_wake_time); - fast_wake_lines = intel_usecs_to_scanlines( - &crtc_state->hw.adjusted_mode, fast_wake_time); - - if (io_wake_lines > max_wake_lines || - fast_wake_lines > max_wake_lines) - return false; - - if (!_lnl_compute_alpm_params(intel_dp, crtc_state)) - return false; - - if (i915->display.params.psr_safest_params) - io_wake_lines = fast_wake_lines = max_wake_lines; - - /* According to Bspec lower limit should be set as 7 lines. */ - intel_dp->alpm_parameters.io_wake_lines = max(io_wake_lines, 7); - intel_dp->alpm_parameters.fast_wake_lines = max(fast_wake_lines, 7); - - return true; -} - static int intel_psr_entry_setup_frames(struct intel_dp *intel_dp, const struct drm_display_mode *adjusted_mode) { @@ -1524,7 +1294,7 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp, return false; } - if (!_compute_alpm_params(intel_dp, crtc_state)) { + if (!intel_alpm_compute_params(intel_dp, crtc_state)) { drm_dbg_kms(&dev_priv->drm, "PSR2 not enabled, Unable to use long enough wake times\n"); return false; @@ -1770,52 +1540,6 @@ static void wm_optimization_wa(struct intel_dp *intel_dp, wa_16013835468_bit_get(intel_dp), 0); } -static void lnl_alpm_configure(struct intel_dp *intel_dp) -{ - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); - enum transcoder cpu_transcoder = intel_dp->psr.transcoder; - u32 alpm_ctl; - - if (DISPLAY_VER(dev_priv) < 20 || (!intel_dp->psr.psr2_enabled && - !intel_dp_is_edp(intel_dp))) - return; - - /* - * Panel Replay on eDP is always using ALPM aux less. I.e. no need to - * check panel support at this point. - */ - if (intel_dp->psr.panel_replay_enabled && intel_dp_is_edp(intel_dp)) { - alpm_ctl = ALPM_CTL_ALPM_ENABLE | - ALPM_CTL_ALPM_AUX_LESS_ENABLE | - ALPM_CTL_AUX_LESS_SLEEP_HOLD_TIME_50_SYMBOLS; - - intel_de_write(dev_priv, - PORT_ALPM_CTL(dev_priv, cpu_transcoder), - PORT_ALPM_CTL_ALPM_AUX_LESS_ENABLE | - PORT_ALPM_CTL_MAX_PHY_SWING_SETUP(15) | - PORT_ALPM_CTL_MAX_PHY_SWING_HOLD(0) | - PORT_ALPM_CTL_SILENCE_PERIOD( - intel_dp->alpm_parameters.silence_period_sym_clocks)); - - intel_de_write(dev_priv, - PORT_ALPM_LFPS_CTL(dev_priv, cpu_transcoder), - PORT_ALPM_LFPS_CTL_LFPS_CYCLE_COUNT(10) | - PORT_ALPM_LFPS_CTL_LFPS_HALF_CYCLE_DURATION( - intel_dp->alpm_parameters.lfps_half_cycle_num_of_syms) | - PORT_ALPM_LFPS_CTL_FIRST_LFPS_HALF_CYCLE_DURATION( - intel_dp->alpm_parameters.lfps_half_cycle_num_of_syms) | - PORT_ALPM_LFPS_CTL_LAST_LFPS_HALF_CYCLE_DURATION( - intel_dp->alpm_parameters.lfps_half_cycle_num_of_syms)); - } else { - alpm_ctl = ALPM_CTL_EXTENDED_FAST_WAKE_ENABLE | - ALPM_CTL_EXTENDED_FAST_WAKE_TIME(intel_dp->alpm_parameters.fast_wake_lines); - } - - alpm_ctl |= ALPM_CTL_ALPM_ENTRY_CHECK(intel_dp->alpm_parameters.check_entry_lines); - - intel_de_write(dev_priv, ALPM_CTL(dev_priv, cpu_transcoder), alpm_ctl); -} - static void intel_psr_enable_source(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state) { @@ -1896,7 +1620,7 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp, IGNORE_PSR2_HW_TRACKING : 0); if (intel_dp_is_edp(intel_dp)) - lnl_alpm_configure(intel_dp); + intel_alpm_configure(intel_dp); /* * Wa_16013835468 diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile index b620389761d5..927c16d4fa85 100644 --- a/drivers/gpu/drm/xe/Makefile +++ b/drivers/gpu/drm/xe/Makefile @@ -217,6 +217,7 @@ xe-$(CONFIG_DRM_XE_DISPLAY) += \ # Display code shared with i915 xe-$(CONFIG_DRM_XE_DISPLAY) += \ i915-display/icl_dsi.o \ + i915-display/intel_alpm.o \ i915-display/intel_atomic.o \ i915-display/intel_atomic_plane.o \ i915-display/intel_audio.o \