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(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 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> MIME-Version: 1.0 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; X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250310_034219_945896_BFDC0FBA X-CRM114-Status: UNSURE ( 8.88 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dri-devel@lists.freedesktop.org, dianders@chromium.org, Laurent.pinchart@ideasonboard.com, andrzej.hajda@intel.com, airlied@gmail.com, simona@ffwll.ch, robh@kernel.org, rfoss@kernel.org, sebastian.reichel@collabora.com, jernej.skrabec@gmail.com, linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, conor+dt@kernel.org, jonas@kwiboo.se, maarten.lankhorst@linux.intel.com, mripard@kernel.org, dmitry.baryshkov@linaro.org, Damon Ding , linux-arm-kernel@lists.infradead.org, neil.armstrong@linaro.org, hjc@rock-chips.com, linux-kernel@vger.kernel.org, boris.brezillon@collabora.com, tzimmermann@suse.de, andy.yan@rock-chips.com, krzk+dt@kernel.org, l.stach@pengutronix.de Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org 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 --- .../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/gpu/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; } +static int analogix_dpaux_wait_hpd_asserted(struct drm_dp_aux *aux, unsigned long wait_us) +{ + struct analogix_dp_device *dp = to_dp(aux); + int val; + int ret; + + if (dp->force_hpd) + return 0; + + pm_runtime_get_sync(dp->dev); + + ret = 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_data) { @@ -1652,6 +1672,7 @@ analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data) dp->aux.name = "DP-AUX"; dp->aux.transfer = analogix_dpaux_transfer; + dp->aux.wait_hpd_asserted = analogix_dpaux_wait_hpd_asserted; dp->aux.dev = dp->dev; drm_dp_aux_init(&dp->aux);