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From: Enric Balletbo i Serra <enric.balletbo@collabora.com>
To: architt@codeaurora.org, inki.dae@samsung.com,
	thierry.reding@gmail.com, hjc@rock-chips.com,
	seanpaul@chromium.org, airlied@linux.ie, tfiga@chromium.org,
	heiko@sntech.de
Cc: dri-devel@lists.freedesktop.org, dianders@chromium.org,
	a.hajda@samsung.com, ykk@rock-chips.com, kernel@collabora.com,
	m.szyprowski@samsung.com, linux-samsung-soc@vger.kernel.org,
	jy0922.shim@samsung.com, rydberg@bitmath.org, krzk@kernel.org,
	linux-rockchip@lists.infradead.org, kgene@kernel.org,
	linux-input@vger.kernel.org, orjan.eide@arm.com,
	wxt@rock-chips.com, jeffy.chen@rock-chips.com,
	linux-arm-kernel@lists.infradead.org, mark.yao@rock-chips.com,
	wzz@rock-chips.com, hl@rock-chips.com, jingoohan1@gmail.com,
	sw0312.kim@samsung.com, linux-kernel@vger.kernel.org,
	kyungmin.park@samsung.com, Laurent.pinchart@ideasonboard.com,
	kuankuan.y@gmail.com, hshi@chromium.org,
	"Stéphane Marchesin" <marcheu@chromium.org>,
	"Enric Balletbo i Serra" <enric.balletbo@collabora.com>
Subject: [PATCH v6 04/30] drm/bridge: analogix_dp: Retry bridge enable when it failed
Date: Thu,  5 Apr 2018 11:49:34 +0200	[thread overview]
Message-ID: <20180405095000.9756-5-enric.balletbo@collabora.com> (raw)
In-Reply-To: <20180405095000.9756-1-enric.balletbo@collabora.com>

From: zain wang <wzz@rock-chips.com>

When we enable bridge failed, we have to retry it, otherwise we would get
the abnormal display.

Cc: Stéphane Marchesin <marcheu@chromium.org>
Signed-off-by: zain wang <wzz@rock-chips.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
---

 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 65 +++++++++++++++++-----
 drivers/gpu/drm/bridge/analogix/analogix_dp_core.h |  3 +-
 drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c  |  5 +-
 3 files changed, 56 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 85dbb1ca9886..bf805f156272 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -43,8 +43,10 @@ struct bridge_init {
 	struct device_node *node;
 };
 
-static void analogix_dp_init_dp(struct analogix_dp_device *dp)
+static int analogix_dp_init_dp(struct analogix_dp_device *dp)
 {
+	int ret;
+
 	analogix_dp_reset(dp);
 
 	analogix_dp_swreset(dp);
@@ -56,10 +58,13 @@ static void analogix_dp_init_dp(struct analogix_dp_device *dp)
 	analogix_dp_enable_sw_function(dp);
 
 	analogix_dp_config_interrupt(dp);
-	analogix_dp_init_analog_func(dp);
+	ret = analogix_dp_init_analog_func(dp);
+	if (ret)
+		return ret;
 
 	analogix_dp_init_hpd(dp);
 	analogix_dp_init_aux(dp);
+	return 0;
 }
 
 static int analogix_dp_detect_hpd(struct analogix_dp_device *dp)
@@ -918,7 +923,7 @@ static irqreturn_t analogix_dp_irq_thread(int irq, void *arg)
 	return IRQ_HANDLED;
 }
 
-static void analogix_dp_commit(struct analogix_dp_device *dp)
+static int analogix_dp_commit(struct analogix_dp_device *dp)
 {
 	int ret;
 
@@ -928,11 +933,10 @@ static void analogix_dp_commit(struct analogix_dp_device *dp)
 			DRM_ERROR("failed to disable the panel\n");
 	}
 
-	ret = readx_poll_timeout(analogix_dp_train_link, dp, ret, !ret, 100,
-				 DP_TIMEOUT_TRAINING_US * 5);
+	ret = analogix_dp_train_link(dp);
 	if (ret) {
 		dev_err(dp->dev, "unable to do link train, ret=%d\n", ret);
-		return;
+		return ret;
 	}
 
 	analogix_dp_enable_scramble(dp, 1);
@@ -953,6 +957,7 @@ static void analogix_dp_commit(struct analogix_dp_device *dp)
 	dp->psr_enable = analogix_dp_detect_sink_psr(dp);
 	if (dp->psr_enable)
 		analogix_dp_enable_sink_psr(dp);
+	return 0;
 }
 
 /*
@@ -1149,12 +1154,9 @@ static void analogix_dp_bridge_pre_enable(struct drm_bridge *bridge)
 		DRM_ERROR("failed to setup the panel ret = %d\n", ret);
 }
 
-static void analogix_dp_bridge_enable(struct drm_bridge *bridge)
+static int analogix_dp_set_bridge(struct analogix_dp_device *dp)
 {
-	struct analogix_dp_device *dp = bridge->driver_private;
-
-	if (dp->dpms_mode == DRM_MODE_DPMS_ON)
-		return;
+	int ret;
 
 	pm_runtime_get_sync(dp->dev);
 
@@ -1162,11 +1164,46 @@ static void analogix_dp_bridge_enable(struct drm_bridge *bridge)
 		dp->plat_data->power_on(dp->plat_data);
 
 	phy_power_on(dp->phy);
-	analogix_dp_init_dp(dp);
+
+	ret = analogix_dp_init_dp(dp);
+	if (ret)
+		goto out_dp_init;
+
+	ret = analogix_dp_commit(dp);
+	if (ret)
+		goto out_dp_init;
+
 	enable_irq(dp->irq);
-	analogix_dp_commit(dp);
+	return 0;
 
-	dp->dpms_mode = DRM_MODE_DPMS_ON;
+out_dp_init:
+	phy_power_off(dp->phy);
+	if (dp->plat_data->power_off)
+		dp->plat_data->power_off(dp->plat_data);
+	pm_runtime_put_sync(dp->dev);
+
+	return ret;
+}
+
+static void analogix_dp_bridge_enable(struct drm_bridge *bridge)
+{
+	struct analogix_dp_device *dp = bridge->driver_private;
+	int timeout_loop = 0;
+
+	if (dp->dpms_mode == DRM_MODE_DPMS_ON)
+		return;
+
+	while (timeout_loop < MAX_PLL_LOCK_LOOP) {
+		if (analogix_dp_set_bridge(dp) == 0) {
+			dp->dpms_mode = DRM_MODE_DPMS_ON;
+			return;
+		}
+		dev_err(dp->dev, "failed to set bridge, retry: %d\n",
+			timeout_loop);
+		timeout_loop++;
+		usleep_range(10, 11);
+	}
+	dev_err(dp->dev, "too many times retry set bridge, give it up\n");
 }
 
 static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
index 403ff853464b..769255dc6e99 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
@@ -19,6 +19,7 @@
 #define DP_TIMEOUT_LOOP_COUNT 100
 #define MAX_CR_LOOP 5
 #define MAX_EQ_LOOP 5
+#define MAX_PLL_LOCK_LOOP 5
 
 /* Training takes 22ms if AUX channel comm fails. Use this as retry interval */
 #define DP_TIMEOUT_TRAINING_US			22000
@@ -197,7 +198,7 @@ void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable);
 void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
 				       enum analog_power_block block,
 				       bool enable);
-void analogix_dp_init_analog_func(struct analogix_dp_device *dp);
+int analogix_dp_init_analog_func(struct analogix_dp_device *dp);
 void analogix_dp_init_hpd(struct analogix_dp_device *dp);
 void analogix_dp_force_hpd(struct analogix_dp_device *dp);
 enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp);
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
index e78c861b9e06..b47c5af43560 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
@@ -333,7 +333,7 @@ void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
 	}
 }
 
-void analogix_dp_init_analog_func(struct analogix_dp_device *dp)
+int analogix_dp_init_analog_func(struct analogix_dp_device *dp)
 {
 	u32 reg;
 	int timeout_loop = 0;
@@ -355,7 +355,7 @@ void analogix_dp_init_analog_func(struct analogix_dp_device *dp)
 			timeout_loop++;
 			if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
 				dev_err(dp->dev, "failed to get pll lock status\n");
-				return;
+				return -ETIMEDOUT;
 			}
 			usleep_range(10, 20);
 		}
@@ -366,6 +366,7 @@ void analogix_dp_init_analog_func(struct analogix_dp_device *dp)
 	reg &= ~(SERDES_FIFO_FUNC_EN_N | LS_CLK_DOMAIN_FUNC_EN_N
 		| AUX_FUNC_EN_N);
 	writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+	return 0;
 }
 
 void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp)
-- 
2.16.3

WARNING: multiple messages have this Message-ID
From: Enric Balletbo i Serra <enric.balletbo@collabora.com>
To: architt@codeaurora.org, inki.dae@samsung.com,
	thierry.reding@gmail.com, hjc@rock-chips.com,
	seanpaul@chromium.org, airlied@linux.ie, tfiga@chromium.org,
	heiko@sntech.de
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	a.hajda@samsung.com, Laurent.pinchart@ideasonboard.com,
	ykk@rock-chips.com, kernel@collabora.com,
	m.szyprowski@samsung.com, linux-samsung-soc@vger.kernel.org,
	jy0922.shim@samsung.com, rydberg@bitmath.org, krzk@kernel.org,
	linux-rockchip@lists.infradead.org, kgene@kernel.org,
	linux-input@vger.kernel.org, orjan.eide@arm.com,
	wxt@rock-chips.com, jeffy.chen@rock-chips.com,
	"Stéphane Marchesin" <marcheu@chromium.org>,
	linux-arm-kernel@lists.infradead.org, mark.yao@rock-chips.com,
	wzz@rock-chips.com, hl@rock-chips.com, jingoohan1@gmail.com,
	sw0312.kim@samsung.com, dianders@chromium.org,
	kyungmin.park@samsung.com,
	"Enric Balletbo i Serra" <enric.balletbo@collabora.com>,
	kuankuan.y@gmail.com, hshi@chromium.org
Subject: [PATCH v6 04/30] drm/bridge: analogix_dp: Retry bridge enable when it failed
Date: Thu,  5 Apr 2018 11:49:34 +0200	[thread overview]
Message-ID: <20180405095000.9756-5-enric.balletbo@collabora.com> (raw)
In-Reply-To: <20180405095000.9756-1-enric.balletbo@collabora.com>

From: zain wang <wzz@rock-chips.com>

When we enable bridge failed, we have to retry it, otherwise we would get
the abnormal display.

Cc: Stéphane Marchesin <marcheu@chromium.org>
Signed-off-by: zain wang <wzz@rock-chips.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
---

 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 65 +++++++++++++++++-----
 drivers/gpu/drm/bridge/analogix/analogix_dp_core.h |  3 +-
 drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c  |  5 +-
 3 files changed, 56 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 85dbb1ca9886..bf805f156272 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -43,8 +43,10 @@ struct bridge_init {
 	struct device_node *node;
 };
 
-static void analogix_dp_init_dp(struct analogix_dp_device *dp)
+static int analogix_dp_init_dp(struct analogix_dp_device *dp)
 {
+	int ret;
+
 	analogix_dp_reset(dp);
 
 	analogix_dp_swreset(dp);
@@ -56,10 +58,13 @@ static void analogix_dp_init_dp(struct analogix_dp_device *dp)
 	analogix_dp_enable_sw_function(dp);
 
 	analogix_dp_config_interrupt(dp);
-	analogix_dp_init_analog_func(dp);
+	ret = analogix_dp_init_analog_func(dp);
+	if (ret)
+		return ret;
 
 	analogix_dp_init_hpd(dp);
 	analogix_dp_init_aux(dp);
+	return 0;
 }
 
 static int analogix_dp_detect_hpd(struct analogix_dp_device *dp)
@@ -918,7 +923,7 @@ static irqreturn_t analogix_dp_irq_thread(int irq, void *arg)
 	return IRQ_HANDLED;
 }
 
-static void analogix_dp_commit(struct analogix_dp_device *dp)
+static int analogix_dp_commit(struct analogix_dp_device *dp)
 {
 	int ret;
 
@@ -928,11 +933,10 @@ static void analogix_dp_commit(struct analogix_dp_device *dp)
 			DRM_ERROR("failed to disable the panel\n");
 	}
 
-	ret = readx_poll_timeout(analogix_dp_train_link, dp, ret, !ret, 100,
-				 DP_TIMEOUT_TRAINING_US * 5);
+	ret = analogix_dp_train_link(dp);
 	if (ret) {
 		dev_err(dp->dev, "unable to do link train, ret=%d\n", ret);
-		return;
+		return ret;
 	}
 
 	analogix_dp_enable_scramble(dp, 1);
@@ -953,6 +957,7 @@ static void analogix_dp_commit(struct analogix_dp_device *dp)
 	dp->psr_enable = analogix_dp_detect_sink_psr(dp);
 	if (dp->psr_enable)
 		analogix_dp_enable_sink_psr(dp);
+	return 0;
 }
 
 /*
@@ -1149,12 +1154,9 @@ static void analogix_dp_bridge_pre_enable(struct drm_bridge *bridge)
 		DRM_ERROR("failed to setup the panel ret = %d\n", ret);
 }
 
-static void analogix_dp_bridge_enable(struct drm_bridge *bridge)
+static int analogix_dp_set_bridge(struct analogix_dp_device *dp)
 {
-	struct analogix_dp_device *dp = bridge->driver_private;
-
-	if (dp->dpms_mode == DRM_MODE_DPMS_ON)
-		return;
+	int ret;
 
 	pm_runtime_get_sync(dp->dev);
 
@@ -1162,11 +1164,46 @@ static void analogix_dp_bridge_enable(struct drm_bridge *bridge)
 		dp->plat_data->power_on(dp->plat_data);
 
 	phy_power_on(dp->phy);
-	analogix_dp_init_dp(dp);
+
+	ret = analogix_dp_init_dp(dp);
+	if (ret)
+		goto out_dp_init;
+
+	ret = analogix_dp_commit(dp);
+	if (ret)
+		goto out_dp_init;
+
 	enable_irq(dp->irq);
-	analogix_dp_commit(dp);
+	return 0;
 
-	dp->dpms_mode = DRM_MODE_DPMS_ON;
+out_dp_init:
+	phy_power_off(dp->phy);
+	if (dp->plat_data->power_off)
+		dp->plat_data->power_off(dp->plat_data);
+	pm_runtime_put_sync(dp->dev);
+
+	return ret;
+}
+
+static void analogix_dp_bridge_enable(struct drm_bridge *bridge)
+{
+	struct analogix_dp_device *dp = bridge->driver_private;
+	int timeout_loop = 0;
+
+	if (dp->dpms_mode == DRM_MODE_DPMS_ON)
+		return;
+
+	while (timeout_loop < MAX_PLL_LOCK_LOOP) {
+		if (analogix_dp_set_bridge(dp) == 0) {
+			dp->dpms_mode = DRM_MODE_DPMS_ON;
+			return;
+		}
+		dev_err(dp->dev, "failed to set bridge, retry: %d\n",
+			timeout_loop);
+		timeout_loop++;
+		usleep_range(10, 11);
+	}
+	dev_err(dp->dev, "too many times retry set bridge, give it up\n");
 }
 
 static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
index 403ff853464b..769255dc6e99 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
@@ -19,6 +19,7 @@
 #define DP_TIMEOUT_LOOP_COUNT 100
 #define MAX_CR_LOOP 5
 #define MAX_EQ_LOOP 5
+#define MAX_PLL_LOCK_LOOP 5
 
 /* Training takes 22ms if AUX channel comm fails. Use this as retry interval */
 #define DP_TIMEOUT_TRAINING_US			22000
@@ -197,7 +198,7 @@ void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable);
 void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
 				       enum analog_power_block block,
 				       bool enable);
-void analogix_dp_init_analog_func(struct analogix_dp_device *dp);
+int analogix_dp_init_analog_func(struct analogix_dp_device *dp);
 void analogix_dp_init_hpd(struct analogix_dp_device *dp);
 void analogix_dp_force_hpd(struct analogix_dp_device *dp);
 enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp);
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
index e78c861b9e06..b47c5af43560 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
@@ -333,7 +333,7 @@ void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
 	}
 }
 
-void analogix_dp_init_analog_func(struct analogix_dp_device *dp)
+int analogix_dp_init_analog_func(struct analogix_dp_device *dp)
 {
 	u32 reg;
 	int timeout_loop = 0;
@@ -355,7 +355,7 @@ void analogix_dp_init_analog_func(struct analogix_dp_device *dp)
 			timeout_loop++;
 			if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
 				dev_err(dp->dev, "failed to get pll lock status\n");
-				return;
+				return -ETIMEDOUT;
 			}
 			usleep_range(10, 20);
 		}
@@ -366,6 +366,7 @@ void analogix_dp_init_analog_func(struct analogix_dp_device *dp)
 	reg &= ~(SERDES_FIFO_FUNC_EN_N | LS_CLK_DOMAIN_FUNC_EN_N
 		| AUX_FUNC_EN_N);
 	writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+	return 0;
 }
 
 void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp)
-- 
2.16.3


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WARNING: multiple messages have this Message-ID
From: enric.balletbo@collabora.com (Enric Balletbo i Serra)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 04/30] drm/bridge: analogix_dp: Retry bridge enable when it failed
Date: Thu,  5 Apr 2018 11:49:34 +0200	[thread overview]
Message-ID: <20180405095000.9756-5-enric.balletbo@collabora.com> (raw)
In-Reply-To: <20180405095000.9756-1-enric.balletbo@collabora.com>

From: zain wang <wzz@rock-chips.com>

When we enable bridge failed, we have to retry it, otherwise we would get
the abnormal display.

Cc: St?phane Marchesin <marcheu@chromium.org>
Signed-off-by: zain wang <wzz@rock-chips.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
---

 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 65 +++++++++++++++++-----
 drivers/gpu/drm/bridge/analogix/analogix_dp_core.h |  3 +-
 drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c  |  5 +-
 3 files changed, 56 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 85dbb1ca9886..bf805f156272 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -43,8 +43,10 @@ struct bridge_init {
 	struct device_node *node;
 };
 
-static void analogix_dp_init_dp(struct analogix_dp_device *dp)
+static int analogix_dp_init_dp(struct analogix_dp_device *dp)
 {
+	int ret;
+
 	analogix_dp_reset(dp);
 
 	analogix_dp_swreset(dp);
@@ -56,10 +58,13 @@ static void analogix_dp_init_dp(struct analogix_dp_device *dp)
 	analogix_dp_enable_sw_function(dp);
 
 	analogix_dp_config_interrupt(dp);
-	analogix_dp_init_analog_func(dp);
+	ret = analogix_dp_init_analog_func(dp);
+	if (ret)
+		return ret;
 
 	analogix_dp_init_hpd(dp);
 	analogix_dp_init_aux(dp);
+	return 0;
 }
 
 static int analogix_dp_detect_hpd(struct analogix_dp_device *dp)
@@ -918,7 +923,7 @@ static irqreturn_t analogix_dp_irq_thread(int irq, void *arg)
 	return IRQ_HANDLED;
 }
 
-static void analogix_dp_commit(struct analogix_dp_device *dp)
+static int analogix_dp_commit(struct analogix_dp_device *dp)
 {
 	int ret;
 
@@ -928,11 +933,10 @@ static void analogix_dp_commit(struct analogix_dp_device *dp)
 			DRM_ERROR("failed to disable the panel\n");
 	}
 
-	ret = readx_poll_timeout(analogix_dp_train_link, dp, ret, !ret, 100,
-				 DP_TIMEOUT_TRAINING_US * 5);
+	ret = analogix_dp_train_link(dp);
 	if (ret) {
 		dev_err(dp->dev, "unable to do link train, ret=%d\n", ret);
-		return;
+		return ret;
 	}
 
 	analogix_dp_enable_scramble(dp, 1);
@@ -953,6 +957,7 @@ static void analogix_dp_commit(struct analogix_dp_device *dp)
 	dp->psr_enable = analogix_dp_detect_sink_psr(dp);
 	if (dp->psr_enable)
 		analogix_dp_enable_sink_psr(dp);
+	return 0;
 }
 
 /*
@@ -1149,12 +1154,9 @@ static void analogix_dp_bridge_pre_enable(struct drm_bridge *bridge)
 		DRM_ERROR("failed to setup the panel ret = %d\n", ret);
 }
 
-static void analogix_dp_bridge_enable(struct drm_bridge *bridge)
+static int analogix_dp_set_bridge(struct analogix_dp_device *dp)
 {
-	struct analogix_dp_device *dp = bridge->driver_private;
-
-	if (dp->dpms_mode == DRM_MODE_DPMS_ON)
-		return;
+	int ret;
 
 	pm_runtime_get_sync(dp->dev);
 
@@ -1162,11 +1164,46 @@ static void analogix_dp_bridge_enable(struct drm_bridge *bridge)
 		dp->plat_data->power_on(dp->plat_data);
 
 	phy_power_on(dp->phy);
-	analogix_dp_init_dp(dp);
+
+	ret = analogix_dp_init_dp(dp);
+	if (ret)
+		goto out_dp_init;
+
+	ret = analogix_dp_commit(dp);
+	if (ret)
+		goto out_dp_init;
+
 	enable_irq(dp->irq);
-	analogix_dp_commit(dp);
+	return 0;
 
-	dp->dpms_mode = DRM_MODE_DPMS_ON;
+out_dp_init:
+	phy_power_off(dp->phy);
+	if (dp->plat_data->power_off)
+		dp->plat_data->power_off(dp->plat_data);
+	pm_runtime_put_sync(dp->dev);
+
+	return ret;
+}
+
+static void analogix_dp_bridge_enable(struct drm_bridge *bridge)
+{
+	struct analogix_dp_device *dp = bridge->driver_private;
+	int timeout_loop = 0;
+
+	if (dp->dpms_mode == DRM_MODE_DPMS_ON)
+		return;
+
+	while (timeout_loop < MAX_PLL_LOCK_LOOP) {
+		if (analogix_dp_set_bridge(dp) == 0) {
+			dp->dpms_mode = DRM_MODE_DPMS_ON;
+			return;
+		}
+		dev_err(dp->dev, "failed to set bridge, retry: %d\n",
+			timeout_loop);
+		timeout_loop++;
+		usleep_range(10, 11);
+	}
+	dev_err(dp->dev, "too many times retry set bridge, give it up\n");
 }
 
 static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
index 403ff853464b..769255dc6e99 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
@@ -19,6 +19,7 @@
 #define DP_TIMEOUT_LOOP_COUNT 100
 #define MAX_CR_LOOP 5
 #define MAX_EQ_LOOP 5
+#define MAX_PLL_LOCK_LOOP 5
 
 /* Training takes 22ms if AUX channel comm fails. Use this as retry interval */
 #define DP_TIMEOUT_TRAINING_US			22000
@@ -197,7 +198,7 @@ void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable);
 void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
 				       enum analog_power_block block,
 				       bool enable);
-void analogix_dp_init_analog_func(struct analogix_dp_device *dp);
+int analogix_dp_init_analog_func(struct analogix_dp_device *dp);
 void analogix_dp_init_hpd(struct analogix_dp_device *dp);
 void analogix_dp_force_hpd(struct analogix_dp_device *dp);
 enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp);
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
index e78c861b9e06..b47c5af43560 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
@@ -333,7 +333,7 @@ void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
 	}
 }
 
-void analogix_dp_init_analog_func(struct analogix_dp_device *dp)
+int analogix_dp_init_analog_func(struct analogix_dp_device *dp)
 {
 	u32 reg;
 	int timeout_loop = 0;
@@ -355,7 +355,7 @@ void analogix_dp_init_analog_func(struct analogix_dp_device *dp)
 			timeout_loop++;
 			if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
 				dev_err(dp->dev, "failed to get pll lock status\n");
-				return;
+				return -ETIMEDOUT;
 			}
 			usleep_range(10, 20);
 		}
@@ -366,6 +366,7 @@ void analogix_dp_init_analog_func(struct analogix_dp_device *dp)
 	reg &= ~(SERDES_FIFO_FUNC_EN_N | LS_CLK_DOMAIN_FUNC_EN_N
 		| AUX_FUNC_EN_N);
 	writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+	return 0;
 }
 
 void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp)
-- 
2.16.3

  parent reply	other threads:[~2018-04-05  9:50 UTC|newest]

Thread overview: 123+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-05  9:49 [PATCH v6 00/30] DRM Rockchip rk3399 (Kevin) Enric Balletbo i Serra
2018-04-05  9:49 ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 01/30] drm/bridge: analogix_dp: Move enable video into config_video() Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-09  3:37   ` Sasha Levin
2018-04-05  9:49 ` [PATCH v6 02/30] drm/bridge: analogix_dp: Check AUX_EN status when doing AUX transfer Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 03/30] drm/bridge: analogix_dp: Don't use fast link training when panel just powered up Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` Enric Balletbo i Serra [this message]
2018-04-05  9:49   ` [PATCH v6 04/30] drm/bridge: analogix_dp: Retry bridge enable when it failed Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 05/30] drm/bridge: analogix_dp: Wait for HPD signal before configuring link Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-09  3:37   ` Sasha Levin
2018-04-09  3:37     ` Sasha Levin
2018-04-05  9:49 ` [PATCH v6 06/30] drm/bridge: analogix_dp: Set PD_INC_BG first when powering up edp phy Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-09  3:36   ` Sasha Levin
2018-04-09  3:36     ` Sasha Levin
2018-04-05  9:49 ` [PATCH v6 07/30] drm/bridge: analogix_dp: Ensure edp is disabled when shutting down the panel Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-09  3:36   ` Sasha Levin
2018-04-09  3:36     ` Sasha Levin
2018-04-05  9:49 ` [PATCH v6 08/30] drm/bridge: analogix_dp: Extend hpd check time to 100ms Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 09/30] drm/bridge: analogix_dp: Fix incorrect usage of enhanced mode Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 10/30] drm/bridge: analogix_dp: Check dpcd write/read status Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 11/30] drm/bridge: analogix_dp: Fix AUX_PD bit for Rockchip Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 12/30] drm/bridge: analogix_dp: Reset aux channel if an error occurred Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 13/30] drm/rockchip: Restore psr->state when enable/disable psr failed Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 14/30] drm/bridge: analogix_dp: Don't use ANALOGIX_DP_PLL_CTL to control pll Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 15/30] drm/bridge: analogix_dp: Fix timeout of video streamclk config Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-09  3:36   ` Sasha Levin
2018-04-09  3:36     ` Sasha Levin
2018-04-05  9:49 ` [PATCH v6 16/30] drm/bridge: analogix_dp: Fix incorrect operations with register ANALOGIX_DP_FUNC_EN_1 Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-09  3:36   ` Sasha Levin
2018-04-09  3:36     ` Sasha Levin
2018-04-05  9:49 ` [PATCH v6 17/30] drm/bridge: analogix_dp: Move fast link training detect to set_bridge Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 18/30] drm/bridge: analogix_dp: Reorder plat_data->power_off to happen sooner Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-09  3:36   ` Sasha Levin
2018-04-05  9:49 ` [PATCH v6 19/30] drm/bridge: analogix_dp: Properly log AUX CH errors Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 20/30] drm/bridge: analogix_dp: Properly disable aux chan retries on rockchip Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 21/30] drm/rockchip: pre dither down when output bpc is 8bit Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-09  3:36   ` Sasha Levin
2018-04-09  3:36     ` Sasha Levin
2018-04-05  9:49 ` [PATCH v6 22/30] drm/bridge: analogix_dp: Split the platform-specific poweron in two parts Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 23/30] drm/rockchip: analogix_dp: Do not call Analogix code before bind Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-09  3:36   ` Sasha Levin
2018-04-09  3:36     ` Sasha Levin
2018-04-12  9:54   ` Andrzej Hajda
2018-04-12  9:54     ` Andrzej Hajda
2018-04-12  9:54     ` Andrzej Hajda
2018-04-05  9:49 ` [PATCH v6 24/30] drm/rockchip: Disable PSR on input events Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-16  7:19   ` Andrzej Hajda
2018-04-16  7:19     ` Andrzej Hajda
2018-04-16  7:19     ` Andrzej Hajda
2018-04-16 17:41     ` Dmitry Torokhov
2018-04-16 17:41       ` Dmitry Torokhov
2018-04-16 17:41       ` Dmitry Torokhov
2018-04-16 19:42   ` Ezequiel Garcia
2018-04-16 19:42     ` Ezequiel Garcia
2018-04-20 13:47   ` Andrzej Hajda
2018-04-20 13:47     ` Andrzej Hajda
2018-04-20 13:51     ` Enric Balletbo i Serra
2018-04-20 13:51       ` Enric Balletbo i Serra
2018-04-05  9:49 ` [PATCH v6 25/30] drm/rockchip: Cancel PSR enable work before changing the state Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-16  8:55   ` Andrzej Hajda
2018-04-16  8:55     ` Andrzej Hajda
2018-04-16  8:55     ` Andrzej Hajda
2018-04-05  9:49 ` [PATCH v6 26/30] drm/rockchip: psr: Avoid redundant calls to .set() callback Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-16  9:06   ` Andrzej Hajda
2018-04-16  9:06     ` Andrzej Hajda
2018-04-16  9:06     ` Andrzej Hajda
2018-04-05  9:49 ` [PATCH v6 27/30] drm/rockchip: psr: Sanitize semantics of allow/disallow API Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-16  9:26   ` Andrzej Hajda
2018-04-16  9:26     ` Andrzej Hajda
2018-04-16  9:26     ` Andrzej Hajda
2018-04-05  9:49 ` [PATCH v6 28/30] drm/rockchip: Disable PSR from reboot notifier Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-16  9:57   ` Andrzej Hajda
2018-04-16  9:57     ` Andrzej Hajda
2018-04-16  9:57     ` Andrzej Hajda
2018-04-16 13:12     ` Tomasz Figa
2018-04-16 13:12       ` Tomasz Figa
2018-04-16 13:12       ` Tomasz Figa
2018-04-18  9:18       ` Enric Balletbo Serra
2018-04-18  9:18         ` Enric Balletbo Serra
2018-04-18  9:18         ` Enric Balletbo Serra
2018-04-05  9:49 ` [PATCH v6 29/30] drm/rockchip: Disallow PSR for the whole atomic commit Enric Balletbo i Serra
2018-04-05  9:49   ` Enric Balletbo i Serra
2018-04-16  9:51   ` Andrzej Hajda
2018-04-16  9:51     ` Andrzej Hajda
2018-04-16  9:51     ` Andrzej Hajda
2018-04-05  9:50 ` [PATCH v6 30/30] drm/rockchip: psr: Remove flush by CRTC Enric Balletbo i Serra
2018-04-05  9:50   ` Enric Balletbo i Serra
2018-04-16  9:53   ` Andrzej Hajda
2018-04-16  9:53     ` Andrzej Hajda
2018-04-16  9:53     ` Andrzej Hajda

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