From mboxrd@z Thu Jan 1 00:00:00 1970 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 3B721C25B7E for ; Mon, 27 May 2024 15:58:28 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B980D10E526; Mon, 27 May 2024 15:58:26 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="YLCLjfnA"; dkim-atps=neutral Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7FA7910E0F3; Mon, 27 May 2024 15:58:17 +0000 (UTC) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id E847F61B18; Mon, 27 May 2024 15:58:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A00BC2BBFC; Mon, 27 May 2024 15:58:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1716825496; bh=uufng8KFeHR5LB7rGOgyEAOrEtol4iygnJ1oL8abpO0=; h=From:To:Cc:Subject:Date:From; b=YLCLjfnA4JeVmJpaiGRo+aX+OIhSFgGyf8r4PVk4t6M+DdHA/QpMxzmTx1fCUnOg/ 8xNAFyx0nZXvEr+Ogbq2YrIksAFNZJo2dHzQ2nhkjRXsNDmgipl0o/ijiUVLSSb/rR u5m+mJDAZoZp0bY6A1k5bRbFf1qO+CPIlPpQ7zgYaNqMfvA2SlmF6yVDiUm00Vv4jk kmt/EAhx7VBYIvEUqa2KOmMp/UhxwlONy0FvtzFkGlP2aEfWNM7kdQC0rBPTEGcfpI 3o0PQlZeDSmCV4aqpDwyRsWofB/o4z2eMr1SWfZeFQtPibAiH29lz7+iDMKirRM+96 I57Iu9mWtYDqw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Nicholas Kazlauskas , Mario Limonciello , Alex Deucher , Charlene Liu , Alex Hung , Daniel Wheeler , Sasha Levin , harry.wentland@amd.com, sunpeng.li@amd.com, Rodrigo.Siqueira@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com, daniel@ffwll.ch, wayne.lin@amd.com, martin.leung@amd.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.15 1/6] drm/amd/display: Exit idle optimizations before HDCP execution Date: Mon, 27 May 2024 11:57:51 -0400 Message-ID: <20240527155808.3866107-1-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.160 Content-Transfer-Encoding: 8bit X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" From: Nicholas Kazlauskas [ Upstream commit f30a3bea92bdab398531129d187629fb1d28f598 ] [WHY] PSP can access DCN registers during command submission and we need to ensure that DCN is not in PG before doing so. [HOW] Add a callback to DM to lock and notify DC for idle optimization exit. It can't be DC directly because of a potential race condition with the link protection thread and the rest of DM operation. Cc: Mario Limonciello Cc: Alex Deucher Reviewed-by: Charlene Liu Acked-by: Alex Hung Signed-off-by: Nicholas Kazlauskas Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c | 10 ++++++++++ drivers/gpu/drm/amd/display/modules/inc/mod_hdcp.h | 8 ++++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c index 3e81850a7ffe3..47bb973669d85 100644 --- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c +++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c @@ -88,6 +88,14 @@ static uint8_t is_cp_desired_hdcp2(struct mod_hdcp *hdcp) !hdcp->connection.is_hdcp2_revoked; } +static void exit_idle_optimizations(struct mod_hdcp *hdcp) +{ + struct mod_hdcp_dm *dm = &hdcp->config.dm; + + if (dm->funcs.exit_idle_optimizations) + dm->funcs.exit_idle_optimizations(dm->handle); +} + static enum mod_hdcp_status execution(struct mod_hdcp *hdcp, struct mod_hdcp_event_context *event_ctx, union mod_hdcp_transition_input *input) @@ -507,6 +515,8 @@ enum mod_hdcp_status mod_hdcp_process_event(struct mod_hdcp *hdcp, memset(&event_ctx, 0, sizeof(struct mod_hdcp_event_context)); event_ctx.event = event; + exit_idle_optimizations(hdcp); + /* execute and transition */ exec_status = execution(hdcp, &event_ctx, &hdcp->auth.trans_input); trans_status = transition( diff --git a/drivers/gpu/drm/amd/display/modules/inc/mod_hdcp.h b/drivers/gpu/drm/amd/display/modules/inc/mod_hdcp.h index f37101f5a7777..8a620c34396c7 100644 --- a/drivers/gpu/drm/amd/display/modules/inc/mod_hdcp.h +++ b/drivers/gpu/drm/amd/display/modules/inc/mod_hdcp.h @@ -154,6 +154,13 @@ struct mod_hdcp_ddc { } funcs; }; +struct mod_hdcp_dm { + void *handle; + struct { + void (*exit_idle_optimizations)(void *handle); + } funcs; +}; + struct mod_hdcp_psp { void *handle; void *funcs; @@ -269,6 +276,7 @@ struct mod_hdcp_display_query { struct mod_hdcp_config { struct mod_hdcp_psp psp; struct mod_hdcp_ddc ddc; + struct mod_hdcp_dm dm; uint8_t index; }; -- 2.43.0