From nobody Wed Dec 17 19:52:55 2025 Received: from mail-m49209.qiye.163.com (mail-m49209.qiye.163.com [45.254.49.209]) (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 7A5C2225403 for ; Mon, 10 Mar 2025 11:57:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.254.49.209 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741607869; cv=none; b=FKTQF+6rjWklzAtP1J9NuVAOHvClz4QSo+CkVVHA7gwZsAto49qQF4163iFkBuZLD4ABD4GXV/YI+Kcvc1cTGLCJfut1KAv1YYXPAnZk/MlrXcb8YhuEmP0PN6YgknNVtHDKtuXvuT2P2OshRvwS9MOyzf718N2xORyOqXiWf0A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741607869; c=relaxed/simple; bh=TYe3xrGfI+KEZAuyZkB1/CZgZPIVN3GYQKn1jtaT7jc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=KQtjAKL9vXSccTufM94TT0bmzOQmnIhqga2RgJGVVuEzcAYbxksnHEVwUuOMDGbvFB2pJdeDZqGHOiMLIaOoAGqOw3gR31m1Y87kPRi8JnKFy6iFCNZhAUrlPaj3ty1A3Q1+whSLerMAn3ARKDwlB+pkj2fxix/wdAqQyuJGeS0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=rock-chips.com; spf=pass smtp.mailfrom=rock-chips.com; dkim=pass (1024-bit key) header.d=rock-chips.com header.i=@rock-chips.com header.b=Mt07XzW9; arc=none smtp.client-ip=45.254.49.209 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=rock-chips.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rock-chips.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=rock-chips.com header.i=@rock-chips.com header.b="Mt07XzW9" Received: from zyb-HP-ProDesk-680-G2-MT.. (unknown [58.22.7.114]) by smtp.qiye.163.com (Hmail) with ESMTP id dc188280; Mon, 10 Mar 2025 18:42:15 +0800 (GMT+08:00) From: Damon Ding To: heiko@sntech.de Cc: andy.yan@rock-chips.com, hjc@rock-chips.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, dmitry.baryshkov@linaro.org, dianders@chromium.org, sebastian.reichel@collabora.com, cristian.ciocaltea@collabora.com, boris.brezillon@collabora.com, l.stach@pengutronix.de, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, Damon Ding Subject: [PATCH v8 07/13] drm/bridge: analogix_dp: Add support for &drm_dp_aux.wait_hpd_asserted() Date: Mon, 10 Mar 2025 18:41:08 +0800 Message-Id: <20250310104114.2608063-8-damon.ding@rock-chips.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250310104114.2608063-1-damon.ding@rock-chips.com> References: <20250310104114.2608063-1-damon.ding@rock-chips.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFDSUNOT01LS0k3V1ktWUFJV1kPCRoVCBIfWUFZQ0IeSVZCQ0IeSU1DS04YH0tWFRQJFh oXVRMBExYaEhckFA4PWVdZGBILWUFZTkNVSUlVTFVKSk9ZV1kWGg8SFR0UWUFZT0tIVUpLSEpPSE xVSktLVUpCS0tZBg++ X-HM-Tid: 0a957fa5eccb03a3kunmdc188280 X-HM-MType: 1 X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6NSo6ASo*VjJJTSMXIzlIPSM3 EkwwCzVVSlVKTE9KTUtISEhMT0NCVTMWGhIXVR8aFhQVVR8SFRw7CRQYEFYYExILCFUYFBZFWVdZ EgtZQVlOQ1VJSVVMVUpKT1lXWQgBWUFKTk9CNwY+ DKIM-Signature: a=rsa-sha256; b=Mt07XzW9yyoQKwh7HWb8UUDlKK48215FQ8+zwOAvEjW/6i2X8B7LTNSNDWp2a4oUrRRdd7nRYUE47XZlU2LToe9susyb7WRcMe6vZyMQ1NONQwAwRRVfB6d5TZiNMmmtHsTOAEIl/qP5dTJyuvU2w4WFwA2FV2eWQzqK6ofRiA0=; s=default; c=relaxed/relaxed; d=rock-chips.com; v=1; bh=C5wB+9893I7lZTyFWnjEKSPI75uW0Q31vE5+3MAp5eA=; h=date:mime-version:subject:message-id:from; Content-Type: text/plain; charset="utf-8" Add analogix_dpaux_wait_hpd_asserted() to help confirm the HPD state before doing AUX transfers. Signed-off-by: Damon Ding Reviewed-by: Dmitry Baryshkov Reviewed-by: Douglas Anderson --- .../drm/bridge/analogix/analogix_dp_core.c | 21 +++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/g= pu/drm/bridge/analogix/analogix_dp_core.c index 2b76a9cf3bcb..b7e143b3ff75 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1548,6 +1548,26 @@ static ssize_t analogix_dpaux_transfer(struct drm_dp= _aux *aux, return ret; } =20 +static int analogix_dpaux_wait_hpd_asserted(struct drm_dp_aux *aux, unsign= ed long wait_us) +{ + struct analogix_dp_device *dp =3D to_dp(aux); + int val; + int ret; + + if (dp->force_hpd) + return 0; + + pm_runtime_get_sync(dp->dev); + + ret =3D readx_poll_timeout(analogix_dp_get_plug_in_status, dp, val, !val, + wait_us / 100, wait_us); + + pm_runtime_mark_last_busy(dp->dev); + pm_runtime_put_autosuspend(dp->dev); + + return ret; +} + struct analogix_dp_device * analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_d= ata) { @@ -1652,6 +1672,7 @@ analogix_dp_probe(struct device *dev, struct analogix= _dp_plat_data *plat_data) =20 dp->aux.name =3D "DP-AUX"; dp->aux.transfer =3D analogix_dpaux_transfer; + dp->aux.wait_hpd_asserted =3D analogix_dpaux_wait_hpd_asserted; dp->aux.dev =3D dp->dev; drm_dp_aux_init(&dp->aux); =20 --=20 2.34.1