linux-kernel - [PATCH RESEND 5/6] soc: qcom: pmic-glink: switch to DRM_AUX_HPD

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Message-Id: <20231203114333.1305826-6-dmitry.baryshkov@linaro.org>
Date:   Sun,  3 Dec 2023 14:43:32 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        "Bryan O'Donoghue" <bryan.odonoghue@...aro.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Janne Grunau <j@...nau.net>, Simon Ser <contact@...rsion.fr>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        freedreno@...ts.freedesktop.org
Subject: [PATCH RESEND 5/6] soc: qcom: pmic-glink: switch to DRM_AUX_HPD_BRIDGE

Use the freshly defined DRM_AUX_HPD_BRIDGE instead of open-coding the
same functionality for the DRM bridge chain termination.

Reviewed-by: Bjorn Andersson <andersson@...nel.org>
Acked-by: Bjorn Andersson <andersson@...nel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/soc/qcom/Kconfig              |  1 +
 drivers/soc/qcom/pmic_glink_altmode.c | 33 ++++++++-------------------
 2 files changed, 10 insertions(+), 24 deletions(-)

diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
index b3634e10f6f5..c954001ae79e 100644
--- a/drivers/soc/qcom/Kconfig
+++ b/drivers/soc/qcom/Kconfig
@@ -86,6 +86,7 @@ config QCOM_PMIC_GLINK
 	depends on OF
 	select AUXILIARY_BUS
 	select QCOM_PDR_HELPERS
+	select DRM_AUX_HPD_BRIDGE
 	help
 	  The Qualcomm PMIC GLINK driver provides access, over GLINK, to the
 	  USB and battery firmware running on one of the coprocessors in
diff --git a/drivers/soc/qcom/pmic_glink_altmode.c b/drivers/soc/qcom/pmic_glink_altmode.c
index b78279e2f54c..053b7393e26a 100644
--- a/drivers/soc/qcom/pmic_glink_altmode.c
+++ b/drivers/soc/qcom/pmic_glink_altmode.c
@@ -11,7 +11,7 @@
 #include <linux/mutex.h>
 #include <linux/property.h>
 #include <linux/soc/qcom/pdr.h>
-#include <drm/drm_bridge.h>
+#include <drm/bridge/aux-bridge.h>
 
 #include <linux/usb/typec_altmode.h>
 #include <linux/usb/typec_dp.h>
@@ -76,7 +76,7 @@ struct pmic_glink_altmode_port {
 
 	struct work_struct work;
 
-	struct drm_bridge bridge;
+	struct device *bridge;
 
 	enum typec_orientation orientation;
 	u16 svid;
@@ -230,10 +230,10 @@ static void pmic_glink_altmode_worker(struct work_struct *work)
 	else
 		pmic_glink_altmode_enable_usb(altmode, alt_port);
 
-	if (alt_port->hpd_state)
-		drm_bridge_hpd_notify(&alt_port->bridge, connector_status_connected);
-	else
-		drm_bridge_hpd_notify(&alt_port->bridge, connector_status_disconnected);
+	drm_aux_hpd_bridge_notify(alt_port->bridge,
+				  alt_port->hpd_state ?
+				  connector_status_connected :
+				  connector_status_disconnected);
 
 	pmic_glink_altmode_request(altmode, ALTMODE_PAN_ACK, alt_port->index);
 };
@@ -365,16 +365,6 @@ static void pmic_glink_altmode_callback(const void *data, size_t len, void *priv
 	}
 }
 
-static int pmic_glink_altmode_attach(struct drm_bridge *bridge,
-				     enum drm_bridge_attach_flags flags)
-{
-	return flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR ? 0 : -EINVAL;
-}
-
-static const struct drm_bridge_funcs pmic_glink_altmode_bridge_funcs = {
-	.attach = pmic_glink_altmode_attach,
-};
-
 static void pmic_glink_altmode_put_retimer(void *data)
 {
 	typec_retimer_put(data);
@@ -464,15 +454,10 @@ static int pmic_glink_altmode_probe(struct auxiliary_device *adev,
 		alt_port->index = port;
 		INIT_WORK(&alt_port->work, pmic_glink_altmode_worker);
 
-		alt_port->bridge.funcs = &pmic_glink_altmode_bridge_funcs;
-		alt_port->bridge.of_node = to_of_node(fwnode);
-		alt_port->bridge.ops = DRM_BRIDGE_OP_HPD;
-		alt_port->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
-
-		ret = devm_drm_bridge_add(dev, &alt_port->bridge);
-		if (ret) {
+		alt_port->bridge = drm_dp_hpd_bridge_register(dev, to_of_node(fwnode));
+		if (IS_ERR(alt_port->bridge)) {
 			fwnode_handle_put(fwnode);
-			return ret;
+			return PTR_ERR(alt_port->bridge);
 		}
 
 		alt_port->dp_alt.svid = USB_TYPEC_DP_SID;
-- 
2.39.2