From patchwork Wed Apr 19 15:43:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Yacoub X-Patchwork-Id: 13217074 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 647C7C77B78 for ; Wed, 19 Apr 2023 15:43:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4FF7510E9F3; Wed, 19 Apr 2023 15:43:35 +0000 (UTC) Received: from mail-yb1-xb34.google.com (mail-yb1-xb34.google.com [IPv6:2607:f8b0:4864:20::b34]) by gabe.freedesktop.org (Postfix) with ESMTPS id 024DA10EA0B for ; Wed, 19 Apr 2023 15:43:32 +0000 (UTC) Received: by mail-yb1-xb34.google.com with SMTP id t15so69909ybb.1 for ; Wed, 19 Apr 2023 08:43:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1681919011; x=1684511011; 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=vFlWCMDBx+92U8Gicq4dCE8l+LQWSAsgAPa6YcnP9e8=; b=iTy3Xyz9RYZipczU9NOcIwUnhNUR8zgASdTMZd+jpPIqcU7xJDdt6cwV/pHQyL33V0 vH6gNgft+hVjqAAxbWhw3AhWRkmPN/Ubr1rOOg93JXIVuP7B9D8CxHMJBcgx4+SMnKdJ 9vrMTMezTajwXWum1802xplG+D6d06yaAwHD4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681919011; x=1684511011; 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=vFlWCMDBx+92U8Gicq4dCE8l+LQWSAsgAPa6YcnP9e8=; b=dh/iwoTdDugUS2EUXte94/AGHrK/4885b85rUSmM4YDQZrgQy89x2ziwl7k3sQpINh XT14Zlmv0Z+sbxMDJRz2UTnCMeLaUrY2JGHkHwBEOnICapKgw59LEAvupPh+V+WOzlz7 eeBPjNrE4y/zk8ZSSMQqyoUARg/eui8KUKoSrIAH2N6diRfCbrXp3vF33nwTafp0bQwf 89yeNzjPoGWxtB4LYgTezzSjbD/nx5b7yIhPCXCsY5LVuVjufcz94jVuzKJxYYq+8iZF q7ikFJEn8MnjxlHNk9XZYfhPTZWd0fW7ShM5jE/NUc3a5CL8RflWvf0oUfBLplNRRZtq SPJg== X-Gm-Message-State: AAQBX9eGJ1xn/QFfBkhv+cQtqVKKp0nGNjVMftv5zHerxC6PSwXIliiJ vQsgFenE/hk9JQ9pGxtO5n6I+A== X-Google-Smtp-Source: AKy350bNF4Ll8UsIPtzHLOscm9fz3NHT9bkSJnzOGfqYkDbYJZKWgxKajQuWjyVtuTsgdDFVTToNVA== X-Received: by 2002:a25:c504:0:b0:b96:cb0c:b904 with SMTP id v4-20020a25c504000000b00b96cb0cb904mr200609ybe.9.1681919011672; Wed, 19 Apr 2023 08:43:31 -0700 (PDT) Received: from localhost ([2620:0:1035:15:55c6:7cf1:a68:79b0]) by smtp.gmail.com with UTF8SMTPSA id bx8-20020a056902168800b00b8f5b078eacsm4376733ybb.39.2023.04.19.08.43.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 19 Apr 2023 08:43:31 -0700 (PDT) From: Mark Yacoub X-Google-Original-From: Mark Yacoub To: David Airlie , Daniel Vetter Date: Wed, 19 Apr 2023 11:43:13 -0400 Message-ID: <20230419154321.1993419-4-markyacoub@google.com> X-Mailer: git-send-email 2.40.0.634.g4ca3ef3211-goog In-Reply-To: <20230419154321.1993419-1-markyacoub@google.com> References: <20230419154321.1993419-1-markyacoub@google.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v10 03/10] drm/hdcp: Update property value on content type and user changes 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: , Cc: Jani Nikula , Mark Yacoub , intel-gfx@lists.freedesktop.org, dianders@chromium.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, seanpaul@chromium.org, Rodrigo Vivi , dmitry.baryshkov@linaro.org, freedreno@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Sean Paul Update the connector's property value in 2 cases which were previously missed: 1- Content type changes. The value should revert back to DESIRED from ENABLED in case the driver must re-authenticate the link due to the new content type. 2- Userspace sets value to DESIRED while ENABLED. In this case, the value should be reset immediately to ENABLED since the link is actively being encrypted. To accommodate these changes, I've split up the conditionals to make things a bit more clear (as much as one can with this mess of state). Acked-by: Jani Nikula Reviewed-by: Rodrigo Vivi Signed-off-by: Sean Paul Signed-off-by: Mark Yacoub --- Changes in v2: -None Changes in v3: -Fixed indentation issue identified by 0-day Changes in v4: -None Changes in v5: -None Changes in v6: -Rebased: modifications in drm_hdcp_helper.c instead of drm_hdcp.c Changes in v7: -Rebased as function name has changed. drivers/gpu/drm/display/drm_hdcp_helper.c | 29 +++++++++++++++-------- 1 file changed, 19 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/display/drm_hdcp_helper.c b/drivers/gpu/drm/display/drm_hdcp_helper.c index 34baf2b97cd87..3ee1a6ae26c53 100644 --- a/drivers/gpu/drm/display/drm_hdcp_helper.c +++ b/drivers/gpu/drm/display/drm_hdcp_helper.c @@ -480,21 +480,30 @@ bool drm_hdcp_has_changed(struct drm_connector *connector, return true; /* - * Nothing to do if content type is unchanged and one of: - * - state didn't change - * - HDCP was activated since the last commit - * - attempting to set to desired while already enabled + * Content type changes require an HDCP disable/enable cycle. */ - if (old_hdcp == new_hdcp || - (old_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED && + if (new_conn_state->hdcp_content_type != + old_conn_state->hdcp_content_type) { + new_conn_state->content_protection = + DRM_MODE_CONTENT_PROTECTION_DESIRED; + return true; + } + + /* + * Ignore meaningless state changes: + * - HDCP was activated since the last commit + * - Attempting to set to desired while already enabled + */ + if ((old_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED && new_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED) || (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED && new_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED)) { - if (old_conn_state->hdcp_content_type == - new_conn_state->hdcp_content_type) - return false; + new_conn_state->content_protection = + DRM_MODE_CONTENT_PROTECTION_ENABLED; + return false; } - return true; + /* Finally, if state changes, we need action */ + return old_hdcp != new_hdcp; } EXPORT_SYMBOL(drm_hdcp_has_changed);