From patchwork Wed Apr 9 14:02:57 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Manna, Animesh" X-Patchwork-Id: 14044756 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 F33CDC369A8 for ; Wed, 9 Apr 2025 14:26:14 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 90C6810E8FE; Wed, 9 Apr 2025 14:26:14 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="PlmdLWIb"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0528D10E8FE; Wed, 9 Apr 2025 14:26:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1744208774; x=1775744774; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=UFmD9d48RqNCFySaRoFTOlGTTiOdBhLX1MDFtfRkCBM=; b=PlmdLWIb5oqtnBA0Mqhrb7RA33zSpVPzmZxNpnYAL2Z/pb1yMUkXy4jj cUQMpdu6W1WxwHkeaSYoZ+EwFgFRDrPrRbdKQBwQG3pqxAlypNQcSlj7w Mks7CPqg9935wFT1ZbqN8S3UTkLXY9UojZNu8xp61dtcpQSZVaOtaFPNK PHWu5FUKdnFfMkq72FW7oTiz/l0hWKHSmT1gsJA9Ifzo/+9KoiM/xsy97 CwK+eKZm2wTGKhYi0pn3E6KX468Nqc42lN0jPwH1k4iZr4BQM61HPv20V NvBJMtvbRjLGdrRbxS1iPQNJe7UGmt7bYqOPrIoFTDisYL5WUinTD6VZG A==; X-CSE-ConnectionGUID: 99OtFO2FTz655zdh8SsMHg== X-CSE-MsgGUID: 8XPYpsiuQaWu5T4dUAX2KA== X-IronPort-AV: E=McAfee;i="6700,10204,11397"; a="49347802" X-IronPort-AV: E=Sophos;i="6.15,200,1739865600"; d="scan'208";a="49347802" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Apr 2025 07:26:14 -0700 X-CSE-ConnectionGUID: kHCesH7QQjCofIvTyI6rBw== X-CSE-MsgGUID: 2x0K8a60Rju27PFsO31l1w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,200,1739865600"; d="scan'208";a="132732733" Received: from srr4-3-linux-101-amanna.iind.intel.com ([10.223.74.76]) by fmviesa003.fm.intel.com with ESMTP; 09 Apr 2025 07:26:12 -0700 From: Animesh Manna To: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org Cc: jouni.hogander@intel.com, jani.nikula@intel.com, jeevan.b@intel.com, Animesh Manna Subject: [PATCH v8 8/9] drm/i915/lobf: Add mutex for alpm update Date: Wed, 9 Apr 2025 19:32:57 +0530 Message-Id: <20250409140258.785834-9-animesh.manna@intel.com> X-Mailer: git-send-email 2.29.0 In-Reply-To: <20250409140258.785834-1-animesh.manna@intel.com> References: <20250409140258.785834-1-animesh.manna@intel.com> MIME-Version: 1.0 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" The ALPM_CTL can be updated from different context, so add mutex to sychonize the update. Signed-off-by: Animesh Manna Reviewed-by: Jouni Högander --- drivers/gpu/drm/i915/display/intel_alpm.c | 9 ++++++++- drivers/gpu/drm/i915/display/intel_alpm.h | 2 +- drivers/gpu/drm/i915/display/intel_display_types.h | 1 + drivers/gpu/drm/i915/display/intel_dp.c | 2 +- 4 files changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_alpm.c b/drivers/gpu/drm/i915/display/intel_alpm.c index 4b63d8a6bc26..e4eb7dae5f43 100644 --- a/drivers/gpu/drm/i915/display/intel_alpm.c +++ b/drivers/gpu/drm/i915/display/intel_alpm.c @@ -25,7 +25,7 @@ bool intel_alpm_aux_less_wake_supported(struct intel_dp *intel_dp) return intel_dp->alpm_dpcd & DP_ALPM_AUX_LESS_CAP; } -void intel_alpm_init_dpcd(struct intel_dp *intel_dp) +void intel_alpm_init(struct intel_dp *intel_dp) { u8 dpcd; @@ -33,6 +33,7 @@ void intel_alpm_init_dpcd(struct intel_dp *intel_dp) return; intel_dp->alpm_dpcd = dpcd; + mutex_init(&intel_dp->alpm_parameters.lock); } /* @@ -331,6 +332,7 @@ static void lnl_alpm_configure(struct intel_dp *intel_dp, (!crtc_state->has_sel_update && !intel_dp_is_edp(intel_dp))) return; + mutex_lock(&intel_dp->alpm_parameters.lock); /* * Panel Replay on eDP is always using ALPM aux less. I.e. no need to * check panel support at this point. @@ -374,6 +376,7 @@ static void lnl_alpm_configure(struct intel_dp *intel_dp, alpm_ctl |= ALPM_CTL_ALPM_ENTRY_CHECK(intel_dp->alpm_parameters.check_entry_lines); intel_de_write(display, ALPM_CTL(display, cpu_transcoder), alpm_ctl); + mutex_unlock(&intel_dp->alpm_parameters.lock); } void intel_alpm_configure(struct intel_dp *intel_dp, @@ -497,6 +500,8 @@ void intel_alpm_disable(struct intel_dp *intel_dp) if (DISPLAY_VER(display) < 20) return; + mutex_lock(&intel_dp->alpm_parameters.lock); + intel_de_rmw(display, ALPM_CTL(display, cpu_transcoder), ALPM_CTL_ALPM_ENABLE | ALPM_CTL_LOBF_ENABLE | ALPM_CTL_ALPM_AUX_LESS_ENABLE, 0); @@ -504,4 +509,6 @@ void intel_alpm_disable(struct intel_dp *intel_dp) intel_de_rmw(display, PORT_ALPM_CTL(cpu_transcoder), PORT_ALPM_CTL_ALPM_AUX_LESS_ENABLE, 0); + + mutex_unlock(&intel_dp->alpm_parameters.lock); } diff --git a/drivers/gpu/drm/i915/display/intel_alpm.h b/drivers/gpu/drm/i915/display/intel_alpm.h index 91f51fb24f98..012b0b1d17ff 100644 --- a/drivers/gpu/drm/i915/display/intel_alpm.h +++ b/drivers/gpu/drm/i915/display/intel_alpm.h @@ -15,7 +15,7 @@ struct intel_connector; struct intel_atomic_state; struct intel_crtc; -void intel_alpm_init_dpcd(struct intel_dp *intel_dp); +void intel_alpm_init(struct intel_dp *intel_dp); bool intel_alpm_compute_params(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state); void intel_alpm_lobf_compute_config(struct intel_dp *intel_dp, diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 389dd033c2d0..11346c159489 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1806,6 +1806,7 @@ struct intel_dp { u8 io_wake_lines; u8 fast_wake_lines; enum transcoder transcoder; + struct mutex lock; /* LNL and beyond */ u8 check_entry_lines; diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index aeb14a5455fd..ed94115560c7 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -6391,7 +6391,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp, */ intel_hpd_enable_detection(encoder); - intel_alpm_init_dpcd(intel_dp); + intel_alpm_init(intel_dp); /* Cache DPCD and EDID for edp. */ has_dpcd = intel_edp_init_dpcd(intel_dp, connector);