From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7E7A925D8F6; Tue, 25 Mar 2025 12:39:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742906395; cv=none; b=qzcKAKN0wmupMBOxxd8XwM6GIdrmteC9d6BsJwHKocmCesU1WDdPKSBdhSWttAiGuFt1gdalvndb2A4G58ZcWvQpUzZD/OLAxT6OHbSTedqVa0nloQcig9MyGXYv2N8eATAuW0hNaQgPH60CevEoyIxfio9gX8XPXlEGqN0kBEY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742906395; c=relaxed/simple; bh=kKXO4uZb4qeAHz06C7IOJZOwcTYfmOqeqDJ5k3i8Xfw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pACa/VhKjoQ9wIQ7dKT//gTQTZuA+lu8rFqbL66oxfNCUicHVXAyu+kOinyGzUHXFvsKn2n+uko0JxqvhIEjyWxNB95mOm892Y0wdsPl+RrWp6CU1H0NogldPmfDuwcfkIR8geueF1e7t/iUGU+YuuTfhoB1+t3OdqU2nI8lEDw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nznnnutV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="nznnnutV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CB073C4CEE4; Tue, 25 Mar 2025 12:39:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1742906395; bh=kKXO4uZb4qeAHz06C7IOJZOwcTYfmOqeqDJ5k3i8Xfw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nznnnutVrGQF6DBoRTlYl2I53/qppeibHCxjv1l2m7VLPrZU4vUbjnum8/x0cEvGg Q9labIGrNDsR4iIGqabQlLJTaH7DkHMhlwkJ3BOL0SmQWzQ8fCWKymGdp9cSdIVh2K UVyxVtpFclyGBHf3NEQoITOPuNtzUvzKN3HsCafU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, ChiaHsuan Chung , Mario Limonciello , Alex Hung , Daniel Wheeler , Alex Deucher Subject: [PATCH 6.12 093/116] drm/amd/display: Use HW lock mgr for PSR1 when only one eDP Date: Tue, 25 Mar 2025 08:23:00 -0400 Message-ID: <20250325122151.589302290@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250325122149.207086105@linuxfoundation.org> References: <20250325122149.207086105@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mario Limonciello commit acbf16a6ae775b4db86f537448cc466288aa307e upstream. [WHY] DMUB locking is important to make sure that registers aren't accessed while in PSR. Previously it was enabled but caused a deadlock in situations with multiple eDP panels. [HOW] Detect if multiple eDP panels are in use to decide whether to use lock. Refactor the function so that the first check is for PSR-SU and then replay is in use to prevent having to look up number of eDP panels for those configurations. Fixes: f245b400a223 ("Revert "drm/amd/display: Use HW lock mgr for PSR1"") Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3965 Reviewed-by: ChiaHsuan Chung Signed-off-by: Mario Limonciello Signed-off-by: Alex Hung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher (cherry picked from commit ed569e1279a3045d6b974226c814e071fa0193a6) Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c | 11 +++++++++++ 1 file changed, 11 insertions(+) --- a/drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c @@ -69,5 +69,16 @@ bool should_use_dmub_lock(struct dc_link if (link->replay_settings.replay_feature_enabled) return true; + /* only use HW lock for PSR1 on single eDP */ + if (link->psr_settings.psr_version == DC_PSR_VERSION_1) { + struct dc_link *edp_links[MAX_NUM_EDP]; + int edp_num; + + dc_get_edp_links(link->dc, edp_links, &edp_num); + + if (edp_num == 1) + return true; + } + return false; }