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From: Guillaume Ranquet <granquet@baylibre.com>
To: Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Kishon Vijay Abraham I <kishon@ti.com>,
	Vinod Koul <vkoul@kernel.org>, Helge Deller <deller@gmx.de>,
	CK Hu <ck.hu@mediatek.com>, Jitao shi <jitao.shi@mediatek.com>
Cc: devicetree@vger.kernel.org, linux-fbdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	linux-phy@lists.infradead.org,
	linux-mediatek@lists.infradead.org,
	Rex-BC Chen <rex-bc.chen@mediatek.com>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v10 20/21] drm/mediatek: add hpd debounce
Date: Mon, 23 May 2022 12:47:53 +0200	[thread overview]
Message-ID: <20220523104758.29531-21-granquet@baylibre.com> (raw)
In-Reply-To: <20220523104758.29531-1-granquet@baylibre.com>

From: Jitao Shi <jitao.shi@mediatek.com>

From the DP spec 1.4a chapter 3.3, upstream devices should implement
HPD signal de-bouncing on an external connection.
A period of 100ms should be used to detect an HPD connect event.
To cover these cases, HPD de-bounce should be implemented only after
HPD low has been detected for at least 100ms.

Therefore,
1. If HPD is low (which means plugging out) for longer than 100ms:
   we need to do de-bouncing (which means we need to wait for 100ms).
2. If HPD low is for less than 100ms:
   we don't need to care about the de-bouncing.

In this patch, we start a 100ms timer and use a need_debounce boolean
to implement the feature.

Two cases when HPD is high:
1. If the timer is expired (>100ms):
   - need_debounce is true.
   - When HPD high (plugging event comes), need_debounce will be true
     and then we need to do de-bouncing (wait for 100ms).
2. If the timer is not expired (<100ms):
   - need_debounce is false.
   - When HPD high (plugging event comes), need_debounce will be false
     and no need to do de-bouncing.

HPD_______             __________________
          |            |<-  100ms   ->
          |____________|
          <-  100ms   ->

Without HPD de-bouncing, USB-C to HDMI Adapaters will not be detected.

The change has been successfully tested with the following devices:
- Dell Adapter - USB-C to HDMI
- Acer 1in1 HDMI dongle
- Ugreen 1in1 HDMI dongle
- innowatt HDMI + USB3 hub
- Acer 2in1 HDMI dongle
- Apple 3in1 HDMI dongle (A2119)
- J5Create 3in1 HDMI dongle (JAC379)

Tested-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
---
 drivers/gpu/drm/mediatek/mtk_dp.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index 4789853ec5ff..c056bc3ca9f6 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -154,6 +154,8 @@ struct mtk_dp {
 	struct mutex dp_lock;
 
 	struct drm_connector *conn;
+	bool need_debounce;
+	struct timer_list debounce_timer;
 };
 
 static struct regmap_config mtk_dp_regmap_config = {
@@ -1970,6 +1972,9 @@ static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev)
 	if (event < 0)
 		return IRQ_HANDLED;
 
+	if (mtk_dp->need_debounce && mtk_dp->train_info.cable_plugged_in)
+		msleep(100);
+
 	if (mtk_dp->drm_dev) {
 		dev_info(mtk_dp->dev, "drm_helper_hpd_irq_event\n");
 		drm_helper_hpd_irq_event(mtk_dp->bridge.dev);
@@ -2047,6 +2052,11 @@ static irqreturn_t mtk_dp_hpd_isr_handler(struct mtk_dp *mtk_dp)
 	}
 	train_info->cable_state_change = true;
 
+	if (!train_info->cable_plugged_in) {
+		mod_timer(&mtk_dp->debounce_timer, jiffies + msecs_to_jiffies(100) - 1);
+		mtk_dp->need_debounce = false;
+	}
+
 	return IRQ_WAKE_THREAD;
 }
 
@@ -2474,6 +2484,13 @@ static const struct drm_bridge_funcs mtk_dp_bridge_funcs = {
 	.detect = mtk_dp_bdg_detect,
 };
 
+static void mtk_dp_debounce_timer(struct timer_list *t)
+{
+	struct mtk_dp *mtk_dp = from_timer(mtk_dp, t, debounce_timer);
+
+	mtk_dp->need_debounce = true;
+}
+
 static int mtk_dp_probe(struct platform_device *pdev)
 {
 	struct mtk_dp *mtk_dp;
@@ -2547,6 +2564,9 @@ static int mtk_dp_probe(struct platform_device *pdev)
 	else
 		mtk_dp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
 
+	mtk_dp->need_debounce = true;
+	timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0);
+
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
 
@@ -2559,6 +2579,7 @@ static int mtk_dp_remove(struct platform_device *pdev)
 
 	platform_device_unregister(mtk_dp->phy_dev);
 	mtk_dp_video_mute(mtk_dp, true);
+	del_timer_sync(&mtk_dp->debounce_timer);
 
 	pm_runtime_disable(&pdev->dev);
 
-- 
2.35.1


WARNING: multiple messages have this Message-ID (diff)
From: Guillaume Ranquet <granquet@baylibre.com>
To: Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Kishon Vijay Abraham I <kishon@ti.com>,
	Vinod Koul <vkoul@kernel.org>, Helge Deller <deller@gmx.de>,
	CK Hu <ck.hu@mediatek.com>, Jitao shi <jitao.shi@mediatek.com>
Cc: Rex-BC Chen <rex-bc.chen@mediatek.com>,
	dri-devel@lists.freedesktop.org,
	linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-phy@lists.infradead.org, linux-fbdev@vger.kernel.org
Subject: [PATCH v10 20/21] drm/mediatek: add hpd debounce
Date: Mon, 23 May 2022 12:47:53 +0200	[thread overview]
Message-ID: <20220523104758.29531-21-granquet@baylibre.com> (raw)
In-Reply-To: <20220523104758.29531-1-granquet@baylibre.com>

From: Jitao Shi <jitao.shi@mediatek.com>

From the DP spec 1.4a chapter 3.3, upstream devices should implement
HPD signal de-bouncing on an external connection.
A period of 100ms should be used to detect an HPD connect event.
To cover these cases, HPD de-bounce should be implemented only after
HPD low has been detected for at least 100ms.

Therefore,
1. If HPD is low (which means plugging out) for longer than 100ms:
   we need to do de-bouncing (which means we need to wait for 100ms).
2. If HPD low is for less than 100ms:
   we don't need to care about the de-bouncing.

In this patch, we start a 100ms timer and use a need_debounce boolean
to implement the feature.

Two cases when HPD is high:
1. If the timer is expired (>100ms):
   - need_debounce is true.
   - When HPD high (plugging event comes), need_debounce will be true
     and then we need to do de-bouncing (wait for 100ms).
2. If the timer is not expired (<100ms):
   - need_debounce is false.
   - When HPD high (plugging event comes), need_debounce will be false
     and no need to do de-bouncing.

HPD_______             __________________
          |            |<-  100ms   ->
          |____________|
          <-  100ms   ->

Without HPD de-bouncing, USB-C to HDMI Adapaters will not be detected.

The change has been successfully tested with the following devices:
- Dell Adapter - USB-C to HDMI
- Acer 1in1 HDMI dongle
- Ugreen 1in1 HDMI dongle
- innowatt HDMI + USB3 hub
- Acer 2in1 HDMI dongle
- Apple 3in1 HDMI dongle (A2119)
- J5Create 3in1 HDMI dongle (JAC379)

Tested-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
---
 drivers/gpu/drm/mediatek/mtk_dp.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index 4789853ec5ff..c056bc3ca9f6 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -154,6 +154,8 @@ struct mtk_dp {
 	struct mutex dp_lock;
 
 	struct drm_connector *conn;
+	bool need_debounce;
+	struct timer_list debounce_timer;
 };
 
 static struct regmap_config mtk_dp_regmap_config = {
@@ -1970,6 +1972,9 @@ static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev)
 	if (event < 0)
 		return IRQ_HANDLED;
 
+	if (mtk_dp->need_debounce && mtk_dp->train_info.cable_plugged_in)
+		msleep(100);
+
 	if (mtk_dp->drm_dev) {
 		dev_info(mtk_dp->dev, "drm_helper_hpd_irq_event\n");
 		drm_helper_hpd_irq_event(mtk_dp->bridge.dev);
@@ -2047,6 +2052,11 @@ static irqreturn_t mtk_dp_hpd_isr_handler(struct mtk_dp *mtk_dp)
 	}
 	train_info->cable_state_change = true;
 
+	if (!train_info->cable_plugged_in) {
+		mod_timer(&mtk_dp->debounce_timer, jiffies + msecs_to_jiffies(100) - 1);
+		mtk_dp->need_debounce = false;
+	}
+
 	return IRQ_WAKE_THREAD;
 }
 
@@ -2474,6 +2484,13 @@ static const struct drm_bridge_funcs mtk_dp_bridge_funcs = {
 	.detect = mtk_dp_bdg_detect,
 };
 
+static void mtk_dp_debounce_timer(struct timer_list *t)
+{
+	struct mtk_dp *mtk_dp = from_timer(mtk_dp, t, debounce_timer);
+
+	mtk_dp->need_debounce = true;
+}
+
 static int mtk_dp_probe(struct platform_device *pdev)
 {
 	struct mtk_dp *mtk_dp;
@@ -2547,6 +2564,9 @@ static int mtk_dp_probe(struct platform_device *pdev)
 	else
 		mtk_dp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
 
+	mtk_dp->need_debounce = true;
+	timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0);
+
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
 
@@ -2559,6 +2579,7 @@ static int mtk_dp_remove(struct platform_device *pdev)
 
 	platform_device_unregister(mtk_dp->phy_dev);
 	mtk_dp_video_mute(mtk_dp, true);
+	del_timer_sync(&mtk_dp->debounce_timer);
 
 	pm_runtime_disable(&pdev->dev);
 
-- 
2.35.1


WARNING: multiple messages have this Message-ID (diff)
From: Guillaume Ranquet <granquet@baylibre.com>
To: Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Kishon Vijay Abraham I <kishon@ti.com>,
	Vinod Koul <vkoul@kernel.org>, Helge Deller <deller@gmx.de>,
	CK Hu <ck.hu@mediatek.com>, Jitao shi <jitao.shi@mediatek.com>
Cc: Rex-BC Chen <rex-bc.chen@mediatek.com>,
	dri-devel@lists.freedesktop.org,
	linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-phy@lists.infradead.org, linux-fbdev@vger.kernel.org
Subject: [PATCH v10 20/21] drm/mediatek: add hpd debounce
Date: Mon, 23 May 2022 12:47:53 +0200	[thread overview]
Message-ID: <20220523104758.29531-21-granquet@baylibre.com> (raw)
In-Reply-To: <20220523104758.29531-1-granquet@baylibre.com>

From: Jitao Shi <jitao.shi@mediatek.com>

From the DP spec 1.4a chapter 3.3, upstream devices should implement
HPD signal de-bouncing on an external connection.
A period of 100ms should be used to detect an HPD connect event.
To cover these cases, HPD de-bounce should be implemented only after
HPD low has been detected for at least 100ms.

Therefore,
1. If HPD is low (which means plugging out) for longer than 100ms:
   we need to do de-bouncing (which means we need to wait for 100ms).
2. If HPD low is for less than 100ms:
   we don't need to care about the de-bouncing.

In this patch, we start a 100ms timer and use a need_debounce boolean
to implement the feature.

Two cases when HPD is high:
1. If the timer is expired (>100ms):
   - need_debounce is true.
   - When HPD high (plugging event comes), need_debounce will be true
     and then we need to do de-bouncing (wait for 100ms).
2. If the timer is not expired (<100ms):
   - need_debounce is false.
   - When HPD high (plugging event comes), need_debounce will be false
     and no need to do de-bouncing.

HPD_______             __________________
          |            |<-  100ms   ->
          |____________|
          <-  100ms   ->

Without HPD de-bouncing, USB-C to HDMI Adapaters will not be detected.

The change has been successfully tested with the following devices:
- Dell Adapter - USB-C to HDMI
- Acer 1in1 HDMI dongle
- Ugreen 1in1 HDMI dongle
- innowatt HDMI + USB3 hub
- Acer 2in1 HDMI dongle
- Apple 3in1 HDMI dongle (A2119)
- J5Create 3in1 HDMI dongle (JAC379)

Tested-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
---
 drivers/gpu/drm/mediatek/mtk_dp.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index 4789853ec5ff..c056bc3ca9f6 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -154,6 +154,8 @@ struct mtk_dp {
 	struct mutex dp_lock;
 
 	struct drm_connector *conn;
+	bool need_debounce;
+	struct timer_list debounce_timer;
 };
 
 static struct regmap_config mtk_dp_regmap_config = {
@@ -1970,6 +1972,9 @@ static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev)
 	if (event < 0)
 		return IRQ_HANDLED;
 
+	if (mtk_dp->need_debounce && mtk_dp->train_info.cable_plugged_in)
+		msleep(100);
+
 	if (mtk_dp->drm_dev) {
 		dev_info(mtk_dp->dev, "drm_helper_hpd_irq_event\n");
 		drm_helper_hpd_irq_event(mtk_dp->bridge.dev);
@@ -2047,6 +2052,11 @@ static irqreturn_t mtk_dp_hpd_isr_handler(struct mtk_dp *mtk_dp)
 	}
 	train_info->cable_state_change = true;
 
+	if (!train_info->cable_plugged_in) {
+		mod_timer(&mtk_dp->debounce_timer, jiffies + msecs_to_jiffies(100) - 1);
+		mtk_dp->need_debounce = false;
+	}
+
 	return IRQ_WAKE_THREAD;
 }
 
@@ -2474,6 +2484,13 @@ static const struct drm_bridge_funcs mtk_dp_bridge_funcs = {
 	.detect = mtk_dp_bdg_detect,
 };
 
+static void mtk_dp_debounce_timer(struct timer_list *t)
+{
+	struct mtk_dp *mtk_dp = from_timer(mtk_dp, t, debounce_timer);
+
+	mtk_dp->need_debounce = true;
+}
+
 static int mtk_dp_probe(struct platform_device *pdev)
 {
 	struct mtk_dp *mtk_dp;
@@ -2547,6 +2564,9 @@ static int mtk_dp_probe(struct platform_device *pdev)
 	else
 		mtk_dp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
 
+	mtk_dp->need_debounce = true;
+	timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0);
+
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
 
@@ -2559,6 +2579,7 @@ static int mtk_dp_remove(struct platform_device *pdev)
 
 	platform_device_unregister(mtk_dp->phy_dev);
 	mtk_dp_video_mute(mtk_dp, true);
+	del_timer_sync(&mtk_dp->debounce_timer);
 
 	pm_runtime_disable(&pdev->dev);
 
-- 
2.35.1


-- 
linux-phy mailing list
linux-phy@lists.infradead.org
https://lists.infradead.org/mailman/listinfo/linux-phy

WARNING: multiple messages have this Message-ID (diff)
From: Guillaume Ranquet <granquet@baylibre.com>
To: Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Kishon Vijay Abraham I <kishon@ti.com>,
	Vinod Koul <vkoul@kernel.org>, Helge Deller <deller@gmx.de>,
	CK Hu <ck.hu@mediatek.com>, Jitao shi <jitao.shi@mediatek.com>
Cc: Rex-BC Chen <rex-bc.chen@mediatek.com>,
	dri-devel@lists.freedesktop.org,
	linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-phy@lists.infradead.org, linux-fbdev@vger.kernel.org
Subject: [PATCH v10 20/21] drm/mediatek: add hpd debounce
Date: Mon, 23 May 2022 12:47:53 +0200	[thread overview]
Message-ID: <20220523104758.29531-21-granquet@baylibre.com> (raw)
In-Reply-To: <20220523104758.29531-1-granquet@baylibre.com>

From: Jitao Shi <jitao.shi@mediatek.com>

From the DP spec 1.4a chapter 3.3, upstream devices should implement
HPD signal de-bouncing on an external connection.
A period of 100ms should be used to detect an HPD connect event.
To cover these cases, HPD de-bounce should be implemented only after
HPD low has been detected for at least 100ms.

Therefore,
1. If HPD is low (which means plugging out) for longer than 100ms:
   we need to do de-bouncing (which means we need to wait for 100ms).
2. If HPD low is for less than 100ms:
   we don't need to care about the de-bouncing.

In this patch, we start a 100ms timer and use a need_debounce boolean
to implement the feature.

Two cases when HPD is high:
1. If the timer is expired (>100ms):
   - need_debounce is true.
   - When HPD high (plugging event comes), need_debounce will be true
     and then we need to do de-bouncing (wait for 100ms).
2. If the timer is not expired (<100ms):
   - need_debounce is false.
   - When HPD high (plugging event comes), need_debounce will be false
     and no need to do de-bouncing.

HPD_______             __________________
          |            |<-  100ms   ->
          |____________|
          <-  100ms   ->

Without HPD de-bouncing, USB-C to HDMI Adapaters will not be detected.

The change has been successfully tested with the following devices:
- Dell Adapter - USB-C to HDMI
- Acer 1in1 HDMI dongle
- Ugreen 1in1 HDMI dongle
- innowatt HDMI + USB3 hub
- Acer 2in1 HDMI dongle
- Apple 3in1 HDMI dongle (A2119)
- J5Create 3in1 HDMI dongle (JAC379)

Tested-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
---
 drivers/gpu/drm/mediatek/mtk_dp.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index 4789853ec5ff..c056bc3ca9f6 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -154,6 +154,8 @@ struct mtk_dp {
 	struct mutex dp_lock;
 
 	struct drm_connector *conn;
+	bool need_debounce;
+	struct timer_list debounce_timer;
 };
 
 static struct regmap_config mtk_dp_regmap_config = {
@@ -1970,6 +1972,9 @@ static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev)
 	if (event < 0)
 		return IRQ_HANDLED;
 
+	if (mtk_dp->need_debounce && mtk_dp->train_info.cable_plugged_in)
+		msleep(100);
+
 	if (mtk_dp->drm_dev) {
 		dev_info(mtk_dp->dev, "drm_helper_hpd_irq_event\n");
 		drm_helper_hpd_irq_event(mtk_dp->bridge.dev);
@@ -2047,6 +2052,11 @@ static irqreturn_t mtk_dp_hpd_isr_handler(struct mtk_dp *mtk_dp)
 	}
 	train_info->cable_state_change = true;
 
+	if (!train_info->cable_plugged_in) {
+		mod_timer(&mtk_dp->debounce_timer, jiffies + msecs_to_jiffies(100) - 1);
+		mtk_dp->need_debounce = false;
+	}
+
 	return IRQ_WAKE_THREAD;
 }
 
@@ -2474,6 +2484,13 @@ static const struct drm_bridge_funcs mtk_dp_bridge_funcs = {
 	.detect = mtk_dp_bdg_detect,
 };
 
+static void mtk_dp_debounce_timer(struct timer_list *t)
+{
+	struct mtk_dp *mtk_dp = from_timer(mtk_dp, t, debounce_timer);
+
+	mtk_dp->need_debounce = true;
+}
+
 static int mtk_dp_probe(struct platform_device *pdev)
 {
 	struct mtk_dp *mtk_dp;
@@ -2547,6 +2564,9 @@ static int mtk_dp_probe(struct platform_device *pdev)
 	else
 		mtk_dp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
 
+	mtk_dp->need_debounce = true;
+	timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0);
+
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
 
@@ -2559,6 +2579,7 @@ static int mtk_dp_remove(struct platform_device *pdev)
 
 	platform_device_unregister(mtk_dp->phy_dev);
 	mtk_dp_video_mute(mtk_dp, true);
+	del_timer_sync(&mtk_dp->debounce_timer);
 
 	pm_runtime_disable(&pdev->dev);
 
-- 
2.35.1


_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

WARNING: multiple messages have this Message-ID (diff)
From: Guillaume Ranquet <granquet@baylibre.com>
To: Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Kishon Vijay Abraham I <kishon@ti.com>,
	Vinod Koul <vkoul@kernel.org>, Helge Deller <deller@gmx.de>,
	CK Hu <ck.hu@mediatek.com>, Jitao shi <jitao.shi@mediatek.com>
Cc: Rex-BC Chen <rex-bc.chen@mediatek.com>,
	dri-devel@lists.freedesktop.org,
	linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-phy@lists.infradead.org, linux-fbdev@vger.kernel.org
Subject: [PATCH v10 20/21] drm/mediatek: add hpd debounce
Date: Mon, 23 May 2022 12:47:53 +0200	[thread overview]
Message-ID: <20220523104758.29531-21-granquet@baylibre.com> (raw)
In-Reply-To: <20220523104758.29531-1-granquet@baylibre.com>

From: Jitao Shi <jitao.shi@mediatek.com>

From the DP spec 1.4a chapter 3.3, upstream devices should implement
HPD signal de-bouncing on an external connection.
A period of 100ms should be used to detect an HPD connect event.
To cover these cases, HPD de-bounce should be implemented only after
HPD low has been detected for at least 100ms.

Therefore,
1. If HPD is low (which means plugging out) for longer than 100ms:
   we need to do de-bouncing (which means we need to wait for 100ms).
2. If HPD low is for less than 100ms:
   we don't need to care about the de-bouncing.

In this patch, we start a 100ms timer and use a need_debounce boolean
to implement the feature.

Two cases when HPD is high:
1. If the timer is expired (>100ms):
   - need_debounce is true.
   - When HPD high (plugging event comes), need_debounce will be true
     and then we need to do de-bouncing (wait for 100ms).
2. If the timer is not expired (<100ms):
   - need_debounce is false.
   - When HPD high (plugging event comes), need_debounce will be false
     and no need to do de-bouncing.

HPD_______             __________________
          |            |<-  100ms   ->
          |____________|
          <-  100ms   ->

Without HPD de-bouncing, USB-C to HDMI Adapaters will not be detected.

The change has been successfully tested with the following devices:
- Dell Adapter - USB-C to HDMI
- Acer 1in1 HDMI dongle
- Ugreen 1in1 HDMI dongle
- innowatt HDMI + USB3 hub
- Acer 2in1 HDMI dongle
- Apple 3in1 HDMI dongle (A2119)
- J5Create 3in1 HDMI dongle (JAC379)

Tested-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
---
 drivers/gpu/drm/mediatek/mtk_dp.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index 4789853ec5ff..c056bc3ca9f6 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -154,6 +154,8 @@ struct mtk_dp {
 	struct mutex dp_lock;
 
 	struct drm_connector *conn;
+	bool need_debounce;
+	struct timer_list debounce_timer;
 };
 
 static struct regmap_config mtk_dp_regmap_config = {
@@ -1970,6 +1972,9 @@ static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev)
 	if (event < 0)
 		return IRQ_HANDLED;
 
+	if (mtk_dp->need_debounce && mtk_dp->train_info.cable_plugged_in)
+		msleep(100);
+
 	if (mtk_dp->drm_dev) {
 		dev_info(mtk_dp->dev, "drm_helper_hpd_irq_event\n");
 		drm_helper_hpd_irq_event(mtk_dp->bridge.dev);
@@ -2047,6 +2052,11 @@ static irqreturn_t mtk_dp_hpd_isr_handler(struct mtk_dp *mtk_dp)
 	}
 	train_info->cable_state_change = true;
 
+	if (!train_info->cable_plugged_in) {
+		mod_timer(&mtk_dp->debounce_timer, jiffies + msecs_to_jiffies(100) - 1);
+		mtk_dp->need_debounce = false;
+	}
+
 	return IRQ_WAKE_THREAD;
 }
 
@@ -2474,6 +2484,13 @@ static const struct drm_bridge_funcs mtk_dp_bridge_funcs = {
 	.detect = mtk_dp_bdg_detect,
 };
 
+static void mtk_dp_debounce_timer(struct timer_list *t)
+{
+	struct mtk_dp *mtk_dp = from_timer(mtk_dp, t, debounce_timer);
+
+	mtk_dp->need_debounce = true;
+}
+
 static int mtk_dp_probe(struct platform_device *pdev)
 {
 	struct mtk_dp *mtk_dp;
@@ -2547,6 +2564,9 @@ static int mtk_dp_probe(struct platform_device *pdev)
 	else
 		mtk_dp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
 
+	mtk_dp->need_debounce = true;
+	timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0);
+
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
 
@@ -2559,6 +2579,7 @@ static int mtk_dp_remove(struct platform_device *pdev)
 
 	platform_device_unregister(mtk_dp->phy_dev);
 	mtk_dp_video_mute(mtk_dp, true);
+	del_timer_sync(&mtk_dp->debounce_timer);
 
 	pm_runtime_disable(&pdev->dev);
 
-- 
2.35.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2022-05-23 10:52 UTC|newest]

Thread overview: 450+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-23 10:47 [PATCH v10 00/21] drm/mediatek: Add mt8195 DisplayPort driver Guillaume Ranquet
2022-05-23 10:47 ` Guillaume Ranquet
2022-05-23 10:47 ` Guillaume Ranquet
2022-05-23 10:47 ` Guillaume Ranquet
2022-05-23 10:47 ` Guillaume Ranquet
2022-05-23 10:47 ` [PATCH v10 01/21] dt-bindings: mediatek,dpi: Add DPINTF compatible Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 12:33   ` Rob Herring
2022-05-23 12:33     ` [PATCH v10 01/21] dt-bindings: mediatek, dpi: " Rob Herring
2022-05-23 12:33     ` Rob Herring
2022-05-23 12:33     ` Rob Herring
2022-05-23 12:33     ` Rob Herring
2022-05-24  3:29   ` [PATCH v10 01/21] dt-bindings: mediatek,dpi: " Chunfeng Yun
2022-05-24  3:29     ` Chunfeng Yun
2022-05-24  3:29     ` Chunfeng Yun
2022-05-24  3:29     ` Chunfeng Yun
2022-05-24  3:29     ` Chunfeng Yun
2022-05-25 11:55   ` AngeloGioacchino Del Regno
2022-05-25 11:55     ` AngeloGioacchino Del Regno
2022-05-25 11:55     ` AngeloGioacchino Del Regno
2022-05-25 11:55     ` AngeloGioacchino Del Regno
2022-05-25 11:55     ` AngeloGioacchino Del Regno
2022-06-07  2:31     ` Rex-BC Chen
2022-06-07  2:31       ` Rex-BC Chen
2022-06-07  2:31       ` Rex-BC Chen
2022-06-07  2:31       ` Rex-BC Chen
2022-06-07  2:31       ` Rex-BC Chen
2022-05-25 12:49   ` Maxime Ripard
2022-05-25 12:49     ` Maxime Ripard
2022-05-25 12:49     ` Maxime Ripard
2022-05-25 12:49     ` Maxime Ripard
2022-05-25 12:49     ` Maxime Ripard
2022-06-07  2:35     ` Rex-BC Chen
2022-06-07  2:35       ` Rex-BC Chen
2022-06-07  2:35       ` Rex-BC Chen
2022-06-07  2:35       ` Rex-BC Chen
2022-06-07  2:35       ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 02/21] dt-bindings: mediatek,dp: Add Display Port binding Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-24  3:35   ` Chunfeng Yun
2022-05-24  3:35     ` Chunfeng Yun
2022-05-24  3:35     ` Chunfeng Yun
2022-05-24  3:35     ` Chunfeng Yun
2022-05-24  3:35     ` Chunfeng Yun
2022-06-10  2:27     ` Rex-BC Chen
2022-06-10  2:27       ` Rex-BC Chen
2022-06-10  2:27       ` Rex-BC Chen
2022-06-10  2:27       ` Rex-BC Chen
2022-06-10  2:27       ` Rex-BC Chen
2022-05-25 15:30   ` AngeloGioacchino Del Regno
2022-05-25 15:30     ` AngeloGioacchino Del Regno
2022-05-25 15:30     ` AngeloGioacchino Del Regno
2022-05-25 15:30     ` AngeloGioacchino Del Regno
2022-05-25 15:30     ` AngeloGioacchino Del Regno
2022-06-10  2:29     ` Rex-BC Chen
2022-06-10  2:29       ` Rex-BC Chen
2022-06-10  2:29       ` Rex-BC Chen
2022-06-10  2:29       ` Rex-BC Chen
2022-06-10  2:29       ` Rex-BC Chen
2022-06-02 13:20   ` Rob Herring
2022-06-02 13:20     ` Rob Herring
2022-06-02 13:20     ` Rob Herring
2022-06-02 13:20     ` Rob Herring
2022-06-02 13:20     ` Rob Herring
2022-05-23 10:47 ` [PATCH v10 03/21] drm/edid: Convert cea_sad helper struct to kernelDoc Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:57   ` Matthias Brugger
2022-05-23 10:57     ` Matthias Brugger
2022-05-23 10:57     ` Matthias Brugger
2022-05-23 10:57     ` Matthias Brugger
2022-05-23 10:57     ` Matthias Brugger
2022-06-07  2:44     ` Rex-BC Chen
2022-06-07  2:44       ` Rex-BC Chen
2022-06-07  2:44       ` Rex-BC Chen
2022-06-07  2:44       ` Rex-BC Chen
2022-06-07  2:44       ` Rex-BC Chen
2022-05-25 12:01   ` AngeloGioacchino Del Regno
2022-05-25 12:01     ` AngeloGioacchino Del Regno
2022-05-25 12:01     ` AngeloGioacchino Del Regno
2022-05-25 12:01     ` AngeloGioacchino Del Regno
2022-05-25 12:01     ` AngeloGioacchino Del Regno
2022-06-07  2:45     ` Rex-BC Chen
2022-06-07  2:45       ` Rex-BC Chen
2022-06-07  2:45       ` Rex-BC Chen
2022-06-07  2:45       ` Rex-BC Chen
2022-06-07  2:45       ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 04/21] drm/edid: Add cea_sad helpers for freq/length Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-25 12:26   ` AngeloGioacchino Del Regno
2022-05-25 12:26     ` AngeloGioacchino Del Regno
2022-05-25 12:26     ` AngeloGioacchino Del Regno
2022-05-25 12:26     ` AngeloGioacchino Del Regno
2022-05-25 12:26     ` AngeloGioacchino Del Regno
2022-06-10  6:50     ` Rex-BC Chen
2022-06-10  6:50       ` Rex-BC Chen
2022-06-10  6:50       ` Rex-BC Chen
2022-06-10  6:50       ` Rex-BC Chen
2022-06-10  6:50       ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 05/21] video/hdmi: Add audio_infoframe packing for DP Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-25 12:32   ` AngeloGioacchino Del Regno
2022-05-25 12:32     ` AngeloGioacchino Del Regno
2022-05-25 12:32     ` AngeloGioacchino Del Regno
2022-05-25 12:32     ` AngeloGioacchino Del Regno
2022-05-25 12:32     ` AngeloGioacchino Del Regno
2022-06-07  3:10     ` Rex-BC Chen
2022-06-07  3:10       ` Rex-BC Chen
2022-06-07  3:10       ` Rex-BC Chen
2022-06-07  3:10       ` Rex-BC Chen
2022-06-07  3:10       ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 06/21] drm/mediatek: dpi: move dpi limits to SoC config Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47 ` [PATCH v10 07/21] drm/mediatek: dpi: implement a CK/DE pol toggle in " Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-30  7:44   ` CK Hu
2022-05-30  7:44     ` CK Hu
2022-05-30  7:44     ` CK Hu
2022-05-30  7:44     ` CK Hu
2022-05-30  7:44     ` CK Hu
2022-06-07  2:54     ` Rex-BC Chen
2022-06-07  2:54       ` Rex-BC Chen
2022-06-07  2:54       ` Rex-BC Chen
2022-06-07  2:54       ` Rex-BC Chen
2022-06-07  2:54       ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 08/21] drm/mediatek: dpi: implement a swap_input " Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-30  7:50   ` CK Hu
2022-05-30  7:50     ` CK Hu
2022-05-30  7:50     ` CK Hu
2022-05-30  7:50     ` CK Hu
2022-05-30  7:50     ` CK Hu
2022-06-13  3:12     ` Rex-BC Chen
2022-06-13  3:12       ` Rex-BC Chen
2022-06-13  3:12       ` Rex-BC Chen
2022-06-13  3:12       ` Rex-BC Chen
2022-06-13  3:12       ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 09/21] drm/mediatek: dpi: move dimension mask to " Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-30  7:55   ` CK Hu
2022-05-30  7:55     ` CK Hu
2022-05-30  7:55     ` CK Hu
2022-05-30  7:55     ` CK Hu
2022-05-30  7:55     ` CK Hu
2022-05-23 10:47 ` [PATCH v10 10/21] drm/mediatek: dpi: move hvsize_mask " Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-30  8:21   ` CK Hu
2022-05-30  8:21     ` CK Hu
2022-05-30  8:21     ` CK Hu
2022-05-30  8:21     ` CK Hu
2022-05-30  8:21     ` CK Hu
2022-05-23 10:47 ` [PATCH v10 11/21] drm/mediatek: dpi: move swap_shift " Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-30  8:38   ` CK Hu
2022-05-30  8:38     ` CK Hu
2022-05-30  8:38     ` CK Hu
2022-05-30  8:38     ` CK Hu
2022-05-30  8:38     ` CK Hu
2022-06-02 11:38     ` Rex-BC Chen
2022-06-02 11:38       ` Rex-BC Chen
2022-06-02 11:38       ` Rex-BC Chen
2022-06-02 11:38       ` Rex-BC Chen
2022-06-02 11:38       ` Rex-BC Chen
2022-06-02 12:19     ` Rex-BC Chen
2022-06-02 12:19       ` Rex-BC Chen
2022-06-02 12:19       ` Rex-BC Chen
2022-06-02 12:19       ` Rex-BC Chen
2022-06-02 12:19       ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 12/21] drm/mediatek: dpi: move the yuv422_en_bit " Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-30  8:47   ` CK Hu
2022-05-30  8:47     ` CK Hu
2022-05-30  8:47     ` CK Hu
2022-05-30  8:47     ` CK Hu
2022-05-30  8:47     ` CK Hu
2022-05-23 10:47 ` [PATCH v10 13/21] drm/mediatek: dpi: move the csc_enable bit " Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47 ` [PATCH v10 14/21] drm/mediatek: dpi: Add dpintf support Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-25 12:58   ` AngeloGioacchino Del Regno
2022-05-25 12:58     ` AngeloGioacchino Del Regno
2022-05-25 12:58     ` AngeloGioacchino Del Regno
2022-05-25 12:58     ` AngeloGioacchino Del Regno
2022-05-25 12:58     ` AngeloGioacchino Del Regno
2022-06-13  6:10     ` Rex-BC Chen
2022-06-13  6:10       ` Rex-BC Chen
2022-06-13  6:10       ` Rex-BC Chen
2022-06-13  6:10       ` Rex-BC Chen
2022-06-13  6:10       ` Rex-BC Chen
2022-06-02  5:48   ` Christophe JAILLET
2022-06-02  5:48     ` Christophe JAILLET
2022-06-02  5:48     ` Christophe JAILLET
2022-06-02  5:48     ` Christophe JAILLET
2022-06-02  5:48     ` Christophe JAILLET
2022-06-13  6:05     ` Rex-BC Chen
2022-06-13  6:05       ` Rex-BC Chen
2022-06-13  6:05       ` Rex-BC Chen
2022-06-13  6:05       ` Rex-BC Chen
2022-06-13  6:05       ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 15/21] drm/mediatek: dpi: Only enable dpi after the bridge is enabled Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47 ` [PATCH v10 16/21] drm/meditek: dpi: Add matrix_sel helper Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47 ` [PATCH v10 17/21] phy: phy-mtk-dp: Add driver for DP phy Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-06-08 16:31   ` Vinod Koul
2022-06-08 16:31     ` Vinod Koul
2022-06-08 16:31     ` Vinod Koul
2022-06-08 16:31     ` Vinod Koul
2022-06-08 16:31     ` Vinod Koul
2022-05-23 10:47 ` [PATCH v10 18/21] drm/mediatek: Add mt8195 Embedded DisplayPort driver Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-25  5:47   ` CK Hu
2022-05-25  5:47     ` CK Hu
2022-05-25  5:47     ` CK Hu
2022-05-25  5:47     ` CK Hu
2022-05-25  5:47     ` CK Hu
2022-05-30  9:34   ` CK Hu
2022-05-30  9:34     ` CK Hu
2022-05-30  9:34     ` CK Hu
2022-05-30  9:34     ` CK Hu
2022-05-30  9:34     ` CK Hu
2022-05-30 10:08   ` CK Hu
2022-05-30 10:08     ` CK Hu
2022-05-30 10:08     ` CK Hu
2022-05-30 10:08     ` CK Hu
2022-05-30 10:08     ` CK Hu
2022-06-07  6:21   ` CK Hu
2022-06-07  6:21     ` CK Hu
2022-06-07  6:21     ` CK Hu
2022-06-07  6:21     ` CK Hu
2022-06-07  6:21     ` CK Hu
2022-06-07 12:24     ` Rex-BC Chen
2022-06-07 12:24       ` Rex-BC Chen
2022-06-07 12:24       ` Rex-BC Chen
2022-06-07 12:24       ` Rex-BC Chen
2022-06-07 12:24       ` Rex-BC Chen
2022-06-08  2:23       ` CK Hu
2022-06-08  2:23         ` CK Hu
2022-06-08  2:23         ` CK Hu
2022-06-08  2:23         ` CK Hu
2022-06-08  2:23         ` CK Hu
2022-06-08  8:43         ` Rex-BC Chen
2022-06-08  8:43           ` Rex-BC Chen
2022-06-08  8:43           ` Rex-BC Chen
2022-06-08  8:43           ` Rex-BC Chen
2022-06-08  8:43           ` Rex-BC Chen
2022-06-08  9:15           ` CK Hu
2022-06-08  9:15             ` CK Hu
2022-06-08  9:15             ` CK Hu
2022-06-08  9:15             ` CK Hu
2022-06-08  9:15             ` CK Hu
2022-06-08 11:52             ` Rex-BC Chen
2022-06-08 11:52               ` Rex-BC Chen
2022-06-08 11:52               ` Rex-BC Chen
2022-06-08 11:52               ` Rex-BC Chen
2022-06-08 11:52               ` Rex-BC Chen
2022-06-07  6:44   ` CK Hu
2022-06-07  6:44     ` CK Hu
2022-06-07  6:44     ` CK Hu
2022-06-07  6:44     ` CK Hu
2022-06-07  6:44     ` CK Hu
2022-06-07 12:44     ` Rex-BC Chen
2022-06-07 12:44       ` Rex-BC Chen
2022-06-07 12:44       ` Rex-BC Chen
2022-06-07 12:44       ` Rex-BC Chen
2022-06-07 12:44       ` Rex-BC Chen
2022-06-08  2:44       ` CK Hu
2022-06-08  2:44         ` CK Hu
2022-06-08  2:44         ` CK Hu
2022-06-08  2:44         ` CK Hu
2022-06-08  2:44         ` CK Hu
2022-06-08 12:54         ` Rex-BC Chen
2022-06-08 12:54           ` Rex-BC Chen
2022-06-08 12:54           ` Rex-BC Chen
2022-06-08 12:54           ` Rex-BC Chen
2022-06-08 12:54           ` Rex-BC Chen
2022-06-07  7:30   ` CK Hu
2022-06-07  7:30     ` CK Hu
2022-06-07  7:30     ` CK Hu
2022-06-07  7:30     ` CK Hu
2022-06-07  7:30     ` CK Hu
2022-06-07 12:46     ` Rex-BC Chen
2022-06-07 12:46       ` Rex-BC Chen
2022-06-07 12:46       ` Rex-BC Chen
2022-06-07 12:46       ` Rex-BC Chen
2022-06-07 12:46       ` Rex-BC Chen
2022-06-07  7:47   ` CK Hu
2022-06-07  7:47     ` CK Hu
2022-06-07  7:47     ` CK Hu
2022-06-07  7:47     ` CK Hu
2022-06-07  7:47     ` CK Hu
2022-06-08 10:26     ` Rex-BC Chen
2022-06-08 10:26       ` Rex-BC Chen
2022-06-08 10:26       ` Rex-BC Chen
2022-06-08 10:26       ` Rex-BC Chen
2022-06-08 10:26       ` Rex-BC Chen
2022-06-09  2:30       ` CK Hu
2022-06-09  2:30         ` CK Hu
2022-06-09  2:30         ` CK Hu
2022-06-09  2:30         ` CK Hu
2022-06-09  2:30         ` CK Hu
2022-06-09  7:24         ` Rex-BC Chen
2022-06-09  7:24           ` Rex-BC Chen
2022-06-09  7:24           ` Rex-BC Chen
2022-06-09  7:24           ` Rex-BC Chen
2022-06-09  7:24           ` Rex-BC Chen
2022-06-07  8:01   ` CK Hu
2022-06-07  8:01     ` CK Hu
2022-06-07  8:01     ` CK Hu
2022-06-07  8:01     ` CK Hu
2022-06-07  8:01     ` CK Hu
2022-06-09  7:18     ` Rex-BC Chen
2022-06-09  7:18       ` Rex-BC Chen
2022-06-09  7:18       ` Rex-BC Chen
2022-06-09  7:18       ` Rex-BC Chen
2022-06-09  7:18       ` Rex-BC Chen
2022-06-07  8:12   ` CK Hu
2022-06-07  8:12     ` CK Hu
2022-06-07  8:12     ` CK Hu
2022-06-07  8:12     ` CK Hu
2022-06-07  8:12     ` CK Hu
2022-06-07 12:55     ` Rex-BC Chen
2022-06-07 12:55       ` Rex-BC Chen
2022-06-07 12:55       ` Rex-BC Chen
2022-06-07 12:55       ` Rex-BC Chen
2022-06-07 12:55       ` Rex-BC Chen
2022-06-07  9:04   ` CK Hu
2022-06-07  9:04     ` CK Hu
2022-06-07  9:04     ` CK Hu
2022-06-07  9:04     ` CK Hu
2022-06-07  9:04     ` CK Hu
2022-06-09  8:00     ` Rex-BC Chen
2022-06-09  8:00       ` Rex-BC Chen
2022-06-09  8:00       ` Rex-BC Chen
2022-06-09  8:00       ` Rex-BC Chen
2022-06-09  8:00       ` Rex-BC Chen
2022-06-08  8:30   ` CK Hu
2022-06-08  8:30     ` CK Hu
2022-06-08  8:30     ` CK Hu
2022-06-08  8:30     ` CK Hu
2022-06-08  8:30     ` CK Hu
2022-06-09  8:03     ` Rex-BC Chen
2022-06-09  8:03       ` Rex-BC Chen
2022-06-09  8:03       ` Rex-BC Chen
2022-06-09  8:03       ` Rex-BC Chen
2022-06-09  8:03       ` Rex-BC Chen
2022-06-08  8:45   ` CK Hu
2022-06-08  8:45     ` CK Hu
2022-06-08  8:45     ` CK Hu
2022-06-08  8:45     ` CK Hu
2022-06-08  8:45     ` CK Hu
2022-06-08  8:54     ` Rex-BC Chen
2022-06-08  8:54       ` Rex-BC Chen
2022-06-08  8:54       ` Rex-BC Chen
2022-06-08  8:54       ` Rex-BC Chen
2022-06-08  8:54       ` Rex-BC Chen
2022-06-09  9:37   ` CK Hu
2022-06-09  9:37     ` CK Hu
2022-06-09  9:37     ` CK Hu
2022-06-09  9:37     ` CK Hu
2022-06-09  9:37     ` CK Hu
2022-06-10  2:10     ` Rex-BC Chen
2022-06-10  2:10       ` Rex-BC Chen
2022-06-10  2:10       ` Rex-BC Chen
2022-06-10  2:10       ` Rex-BC Chen
2022-06-10  2:10       ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 19/21] drm/mediatek: Add mt8195 External DisplayPort support Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-25 13:04   ` AngeloGioacchino Del Regno
2022-05-25 13:04     ` AngeloGioacchino Del Regno
2022-05-25 13:04     ` AngeloGioacchino Del Regno
2022-05-25 13:04     ` AngeloGioacchino Del Regno
2022-05-25 13:04     ` AngeloGioacchino Del Regno
2022-05-23 10:47 ` Guillaume Ranquet [this message]
2022-05-23 10:47   ` [PATCH v10 20/21] drm/mediatek: add hpd debounce Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47 ` [PATCH v10 21/21] drm/mediatek: DP audio support for mt8195 Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-05-23 10:47   ` Guillaume Ranquet
2022-06-02  3:50 ` [PATCH v10 00/21] drm/mediatek: Add mt8195 DisplayPort driver Rex-BC Chen
2022-06-02  3:50   ` Rex-BC Chen
2022-06-02  3:50   ` Rex-BC Chen
2022-06-02  3:50   ` Rex-BC Chen
2022-06-02  3:50   ` Rex-BC Chen
2022-06-02  5:31   ` Rex-BC Chen
2022-06-02  5:31     ` Rex-BC Chen
2022-06-02  5:31     ` Rex-BC Chen
2022-06-02  5:31     ` Rex-BC Chen
2022-06-02  5:31     ` Rex-BC Chen

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