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 5DD2733A00E; Mon, 18 Aug 2025 14:02:09 +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=1755525729; cv=none; b=Y2KsSGkqp3ni8aR3E8J8sPVZzmbh/TEjrsbxHuEyuXkqC3ZdUSIF5n24k5ivg5gqdu+gVNvFxrfqBbhnMvPF72b/0zP/KLw59c/qczpVwdWIqQscMWWicqiPV55v2iAG8SKOTJIt7/gi8MlghNKsZyZ/cyLTTucJ+gibDOaDMDc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755525729; c=relaxed/simple; bh=yZQ7HLOiOzlARTu6FlT0AOt95glGzs9p6yu4Co2g6HQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qPmv1uUN+PZY1/TpkDvxJEQDjZBiIogrW1f0ytlbi9LGH8l9rbN/OdtCYB3VEoCfVOrmUg90b1zljdMvMNkNLnrb3ilhbqQV+p8ykD0N802uDNptTYrudnH2chhG5zA8ACwOqLGSO/NzoxX69TbUTewUNA8pMh6OXnwrE+V5WyE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ENJYjv2y; 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="ENJYjv2y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D734CC4CEEB; Mon, 18 Aug 2025 14:02:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1755525729; bh=yZQ7HLOiOzlARTu6FlT0AOt95glGzs9p6yu4Co2g6HQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ENJYjv2yzdwMvnSUCB4eHAr21UjoYMIAGUCCUCA6gz/smUH34kcQ/PLyZ6iKdv6Bh twHAOQM+8ko+NZ38gVBZShbxFXFsEml+D4U+Ao9DLwkrA4xbwbv91xY0pr0R0tMl3T YEn7JLjJkDCccfoVWKC5xwBZFu1+7rhdP7I+fydY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Aurabindo Pillai , Wayne Lin , Daniel Wheeler , Alex Deucher , Sasha Levin Subject: [PATCH 6.16 350/570] drm/amd/display: Avoid trying AUX transactions on disconnected ports Date: Mon, 18 Aug 2025 14:45:37 +0200 Message-ID: <20250818124519.341928492@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250818124505.781598737@linuxfoundation.org> References: <20250818124505.781598737@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 6.16-stable review patch. If anyone has any objections, please let me know. ------------------ From: Wayne Lin [ Upstream commit deb24e64c8881c462b29e2c69afd9e6669058be5 ] [Why & How] Observe that we try to access DPCD 0x600h of disconnected DP ports. In order not to wasting time on retrying these ports, call dpcd_write_rx_power_ctrl() after checking its connection status. Reviewed-by: Aurabindo Pillai Signed-off-by: Wayne Lin Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/link/link_dpms.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c index 273a3be6d593..f16cba4b9119 100644 --- a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c +++ b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c @@ -140,7 +140,8 @@ void link_blank_dp_stream(struct dc_link *link, bool hw_init) } } - if ((!link->wa_flags.dp_keep_receiver_powered) || hw_init) + if (((!link->wa_flags.dp_keep_receiver_powered) || hw_init) && + (link->type != dc_connection_none)) dpcd_write_rx_power_ctrl(link, false); } } -- 2.39.5