From patchwork Thu Apr 17 02:10:34 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aleksandrs Vinarskis X-Patchwork-Id: 881918 Received: from mail-wm1-f48.google.com (mail-wm1-f48.google.com [209.85.128.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E8A141CC8B0; Thu, 17 Apr 2025 02:13:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.48 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744856038; cv=none; b=XZaOykQP1vTS3IKHvc7Q1trGvJuWEgUm+soq8CXtjsUG5YNSYotdEGco4qiFSTxNF3c3bfQaJWhyZ/Q20Qk+ErltKH3J/Kywo94m8Aj35sRHyZZ8MEnhr22MnluPYxulPepIot4oXcIRyw9x0WjEjpanvlMrRH6wd75EOdN8Xnk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744856038; c=relaxed/simple; bh=7/ib5tCCZMeV+YTJlKqRwyUC+aTwtRQ6VJFeiDg5W5k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=maTjeMcEObmPNIK8U6OgL55uoRfqnG/PNkIwYOg8fS5dtBe7BK27cOaOpURSozvci059h08T70PODMhwHYxhjdXy5NmoEMX4TAXB68StDvJC123Sm3ZykMvULs8yxyuMfPWozqQj1MnCpNZ0rilTyH8hGp1S3J1DUSOaNZBl9Nw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=VA7ZzGf4; arc=none smtp.client-ip=209.85.128.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="VA7ZzGf4" Received: by mail-wm1-f48.google.com with SMTP id 5b1f17b1804b1-43edb40f357so1742375e9.0; Wed, 16 Apr 2025 19:13:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1744856035; x=1745460835; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Pjqs00K/es5vuuaBVD8LAsqW6UPYNiv4vD65jbm2oo8=; b=VA7ZzGf4cIK3VJLxoNnJf17uzJc5uxw1BXPc7TOgwp6jR+nb7infsxmIp0kJw5S1HL UomawTdg7EzxJKZNQm3bNSpHAsmgqaxDn07rPpXaT15cb3jW+8bOVWZNFgbelV9F+x0G 3vXpzm17TWFxdrQ46JXvCRXD66br6GWVjtTDNbPqjAKMuHFXFHbkSOBcYctgnh8aqx27 hsuR40BBPvdRWlfVOBreocKsYP+hbrK2pJWKJJ8iiID4h9HhCcPfpimp3ebmgtrfyj9S Sb86KQiBcCBeLoDis6eI+VwfNVGYREKMpven5/keVD4puacSN7QbBi98vAjCSYBhsjfp wx3g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1744856035; x=1745460835; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Pjqs00K/es5vuuaBVD8LAsqW6UPYNiv4vD65jbm2oo8=; b=l+7gfBU2TP7x7bSc9RADYOpu/BwcOpKJT5VCYn+ePY3u7P3tFv38uy28BYS1P5ReEZ HEdI+ehwa23QBjwfDzsiJcYmr8jFzshKIXJ0Jq4eTGJrxy4XbKEblw1wtEMKTTcUO0Er FnGwAzj0vdln16NtH8BqupLMnulhioKulik+tirFZZmxORhqWcUTwMuYVxvheqUqTnDZ Tz/tcfcKVj21HidNM6UNaWY5+D0kULb42XLD7ejILyGSzdg/sUzVUbO693jndZFbUgbs RlgE2tVAO8r3ITOkPRIM/yJctQlg6FvmyLwXwZ9ZR/gqs1QnRxG3YmbNiTVC2LqPPsxz ywSA== X-Forwarded-Encrypted: i=1; AJvYcCV6nunkWcVGk/Q0mUTUN5jAgiUyS1WunBkeNxC/5hqwQJKWb2Qf7AmB3QccxnFGO5wqYXW4MJLv4MU4sHML@vger.kernel.org, AJvYcCWc9+tm52jMNJLAIolHn4cQiKGBiWJSB/e4uvoeeKZy1zMsKwGaXfRpTLd0NZuJZiPBlEXLdCwMHl9iial6@vger.kernel.org X-Gm-Message-State: AOJu0YxiF/yKDhlM92Ih5mkoVdaRULOVZ6R45FKmpdVEIEDg0SLqJgws q3ZMF4T3r3wFxPIW4nQMUyO5N+5hmBrnND4j3rNyXGmvYh2LNyk= X-Gm-Gg: ASbGncthsL3gcXOanqCiihP9U4RMAslwI5H4VrPDpLl44w2pP0XVMppFa451oX+Bqsv eVrbYWfp1j5yItGgl7Xac1yJolPFAUwxCx/kw74wE1Q1X4mYPezsu/ncQ1WHAcA3NOCFHWdDx9M NkHquijxP19EdgLt3H1LXyLVAlSPAyDQ22KI+eecTxQHPR6u87X7RJzvAzjkxNYhNHDPl0e4HAR lC9tuyZJVATIUj540Cz57UnYJ//DmUdL3L9XINV1A/+WqF7EctS8MDP572vxL9uKlwTB3T93/If nFCq0GD73aBp1V8msKhAJ4zjcpvEU6Ugl6E5Wz+7D/rUl5crQA8yy1It X-Google-Smtp-Source: AGHT+IEr39c8D55+uEn9FSHRIQHSmdOqsYNb7pAPfA4vFCRFkBK/jkVX9f8a5d30XVrtd+wA46b93g== X-Received: by 2002:a05:600c:4e45:b0:43c:fceb:91a with SMTP id 5b1f17b1804b1-4405d616b5amr38046265e9.11.1744856034620; Wed, 16 Apr 2025 19:13:54 -0700 (PDT) Received: from alex-x1.lan ([84.226.118.249]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4405b4d1236sm36940485e9.13.2025.04.16.19.13.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Apr 2025 19:13:54 -0700 (PDT) From: Aleksandrs Vinarskis To: Dmitry Baryshkov , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, dmitry.baryshkov@oss.qualcomm.com Cc: Rob Clark , Abhinav Kumar , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , laurentiu.tudor1@dell.com, abel.vesa@linaro.org, johan@kernel.org, Aleksandrs Vinarskis Subject: [PATCH v3 3/4] drm/msm/dp: Prepare for link training per-segment for LTTPRs Date: Thu, 17 Apr 2025 04:10:34 +0200 Message-ID: <20250417021349.148911-4-alex.vinarskis@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250417021349.148911-1-alex.vinarskis@gmail.com> References: <20250417021349.148911-1-alex.vinarskis@gmail.com> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Per-segment link training requires knowing the number of LTTPRs (if any) present. Store the count during LTTPRs' initialization. Signed-off-by: Aleksandrs Vinarskis --- drivers/gpu/drm/msm/dp/dp_display.c | 17 +++++++++++------ drivers/gpu/drm/msm/dp/dp_link.h | 1 + 2 files changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 5c57c1d7ac60..ab8c1f19dcb4 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -367,16 +367,21 @@ static int msm_dp_display_send_hpd_notification(struct msm_dp_display_private *d return 0; } -static void msm_dp_display_lttpr_init(struct msm_dp_display_private *dp, u8 *dpcd) +static int msm_dp_display_lttpr_init(struct msm_dp_display_private *dp, u8 *dpcd) { - int rc; + int rc, lttpr_count; if (drm_dp_read_lttpr_common_caps(dp->aux, dpcd, dp->link->lttpr_common_caps)) - return; + return 0; - rc = drm_dp_lttpr_init(dp->aux, drm_dp_lttpr_count(dp->link->lttpr_common_caps)); - if (rc) + lttpr_count = drm_dp_lttpr_count(dp->link->lttpr_common_caps); + rc = drm_dp_lttpr_init(dp->aux, lttpr_count); + if (rc) { DRM_ERROR("failed to set LTTPRs transparency mode, rc=%d\n", rc); + return 0; + } + + return lttpr_count; } static int msm_dp_display_process_hpd_high(struct msm_dp_display_private *dp) @@ -390,7 +395,7 @@ static int msm_dp_display_process_hpd_high(struct msm_dp_display_private *dp) if (rc) goto end; - msm_dp_display_lttpr_init(dp, dpcd); + dp->link->lttpr_count = msm_dp_display_lttpr_init(dp, dpcd); rc = msm_dp_panel_read_sink_caps(dp->panel, connector); if (rc) diff --git a/drivers/gpu/drm/msm/dp/dp_link.h b/drivers/gpu/drm/msm/dp/dp_link.h index c47d75cfc720..ba47c6d19fbf 100644 --- a/drivers/gpu/drm/msm/dp/dp_link.h +++ b/drivers/gpu/drm/msm/dp/dp_link.h @@ -62,6 +62,7 @@ struct msm_dp_link_phy_params { struct msm_dp_link { u8 lttpr_common_caps[DP_LTTPR_COMMON_CAP_SIZE]; + int lttpr_count; u32 sink_request; u32 test_response;