[PATCH] drm/bridge: analogix_dp: Split bind() into probe() and real bind()

[PATCH] drm/bridge: analogix_dp: Split bind() into probe() and real bind()

[Marek Szyprowski]

Analogix_dp driver acquires all its resources in ->bind() callback, what
is a bit against the driver component based approach, where driver
initialization is split into probe(), where all resources are gathered, and
bind(), where objects are created and compound driver is initialized.
Extract resource related operations to analogix_dp_probe() and
analogix_dp_remove() and call them before/after registration of the device
components from the main Exynos and Rockchip DP drivers.

This fixes multiple tries of DRM compound driver bind() when example when
DP PHY driver is not yet loaded/probed():

[drm] Exynos DRM: using 14400000.fimd device for DMA mapping operations
exynos-drm exynos-drm: bound 14400000.fimd (ops fimd_component_ops [exynosdrm])
exynos-drm exynos-drm: bound 14450000.mixer (ops mixer_component_ops [exynosdrm])
exynos-dp 145b0000.dp-controller: no DP phy configured
exynos-drm exynos-drm: failed to bind 145b0000.dp-controller (ops exynos_dp_ops [exynosdrm]): -517
exynos-drm exynos-drm: master bind failed: -517
...
[drm] Exynos DRM: using 14400000.fimd device for DMA mapping operations
exynos-drm exynos-drm: bound 14400000.fimd (ops hdmi_enable [exynosdrm])
exynos-drm exynos-drm: bound 14450000.mixer (ops hdmi_enable [exynosdrm])
exynos-drm exynos-drm: bound 145b0000.dp-controller (ops hdmi_enable [exynosdrm])
exynos-drm exynos-drm: bound 14530000.hdmi (ops hdmi_enable [exynosdrm])
[drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
Console: switching to colour frame buffer device 170x48
exynos-drm exynos-drm: fb0: exynosdrmfb frame buffer device
[drm] Initialized exynos 1.1.0 20180330 for exynos-drm on minor 1
...

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
---
 .../drm/bridge/analogix/analogix_dp_core.c    | 33 ++++++++++++-------
 drivers/gpu/drm/exynos/exynos_dp.c            | 15 ++++++---
 .../gpu/drm/rockchip/analogix_dp-rockchip.c   | 15 +++++----
 include/drm/bridge/analogix_dp.h              |  5 +--
 4 files changed, 44 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index dfb59a5fefea..a89a03b66bf2 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1646,8 +1646,7 @@ static ssize_t analogix_dpaux_transfer(struct drm_dp_aux *aux,
 }
 
 struct analogix_dp_device *
-analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
-		 struct analogix_dp_plat_data *plat_data)
+analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct analogix_dp_device *dp;
@@ -1750,22 +1749,30 @@ analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
 					irq_flags, "analogix-dp", dp);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to request irq\n");
-		goto err_disable_pm_runtime;
+		return ERR_PTR(ret);
 	}
 	disable_irq(dp->irq);
 
+	return dp;
+}
+EXPORT_SYMBOL_GPL(analogix_dp_probe);
+
+int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev)
+{
+	int ret;
+
 	dp->drm_dev = drm_dev;
 	dp->encoder = dp->plat_data->encoder;
 
 	dp->aux.name = "DP-AUX";
 	dp->aux.transfer = analogix_dpaux_transfer;
-	dp->aux.dev = &pdev->dev;
+	dp->aux.dev = dp->dev;
 
 	ret = drm_dp_aux_register(&dp->aux);
 	if (ret)
-		return ERR_PTR(ret);
+		return ret;
 
-	pm_runtime_enable(dev);
+	pm_runtime_enable(dp->dev);
 
 	ret = analogix_dp_create_bridge(drm_dev, dp);
 	if (ret) {
@@ -1773,13 +1780,12 @@ analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
 		goto err_disable_pm_runtime;
 	}
 
-	return dp;
+	return 0;
 
 err_disable_pm_runtime:
+	pm_runtime_disable(dp->dev);
 
-	pm_runtime_disable(dev);
-
-	return ERR_PTR(ret);
+	return ret;
 }
 EXPORT_SYMBOL_GPL(analogix_dp_bind);
 
@@ -1796,10 +1802,15 @@ void analogix_dp_unbind(struct analogix_dp_device *dp)
 
 	drm_dp_aux_unregister(&dp->aux);
 	pm_runtime_disable(dp->dev);
-	clk_disable_unprepare(dp->clock);
 }
 EXPORT_SYMBOL_GPL(analogix_dp_unbind);
 
+void analogix_dp_remove(struct analogix_dp_device *dp)
+{
+	clk_disable_unprepare(dp->clock);
+}
+EXPORT_SYMBOL_GPL(analogix_dp_remove);
+
 #ifdef CONFIG_PM
 int analogix_dp_suspend(struct analogix_dp_device *dp)
 {
diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c
index 4785885c0f4f..558b78e8cc32 100644
--- a/drivers/gpu/drm/exynos/exynos_dp.c
+++ b/drivers/gpu/drm/exynos/exynos_dp.c
@@ -184,13 +184,11 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
 
 	dp->plat_data.encoder = encoder;
 
-	dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
-	if (IS_ERR(dp->adp)) {
+	ret = analogix_dp_bind(dp->adp, dp->drm_dev);
+	if (ret)
 		dp->encoder.funcs->destroy(&dp->encoder);
-		return PTR_ERR(dp->adp);
-	}
 
-	return 0;
+	return ret;
 }
 
 static void exynos_dp_unbind(struct device *dev, struct device *master,
@@ -250,12 +248,19 @@ static int exynos_dp_probe(struct platform_device *pdev)
 	dp->ptn_bridge = bridge;
 
 out:
+	dp->adp = analogix_dp_probe(dev, &dp->plat_data);
+	if (IS_ERR(dp->adp))
+		return PTR_ERR(dp->adp);
+
 	return component_add(&pdev->dev, &exynos_dp_ops);
 }
 
 static int exynos_dp_remove(struct platform_device *pdev)
 {
+	struct exynos_dp_device *dp = platform_get_drvdata(pdev);
+
 	component_del(&pdev->dev, &exynos_dp_ops);
+	analogix_dp_remove(dp->adp);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index f38f5e113c6b..b85cf2582864 100644
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
@@ -349,11 +349,9 @@ static int rockchip_dp_bind(struct device *dev, struct device *master,
 	dp->plat_data.power_off = rockchip_dp_powerdown;
 	dp->plat_data.get_modes = rockchip_dp_get_modes;
 
-	dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
-	if (IS_ERR(dp->adp)) {
-		ret = PTR_ERR(dp->adp);
+	ret = analogix_dp_bind(dp->adp, drm_dev);
+	if (ret)
 		goto err_cleanup_encoder;
-	}
 
 	return 0;
 err_cleanup_encoder:
@@ -368,8 +366,6 @@ static void rockchip_dp_unbind(struct device *dev, struct device *master,
 
 	analogix_dp_unbind(dp->adp);
 	dp->encoder.funcs->destroy(&dp->encoder);
-
-	dp->adp = ERR_PTR(-ENODEV);
 }
 
 static const struct component_ops rockchip_dp_component_ops = {
@@ -402,12 +398,19 @@ static int rockchip_dp_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, dp);
 
+	dp->adp = analogix_dp_probe(dev, &dp->plat_data);
+	if (IS_ERR(dp->adp))
+		return PTR_ERR(dp->adp);
+
 	return component_add(dev, &rockchip_dp_component_ops);
 }
 
 static int rockchip_dp_remove(struct platform_device *pdev)
 {
+	struct rockchip_dp_device *dp = platform_get_drvdata(pdev);
+
 	component_del(&pdev->dev, &rockchip_dp_component_ops);
+	analogix_dp_remove(dp->adp);
 
 	return 0;
 }
diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h
index 7aa2f93da49c..b0dcc07334a1 100644
--- a/include/drm/bridge/analogix_dp.h
+++ b/include/drm/bridge/analogix_dp.h
@@ -42,9 +42,10 @@ int analogix_dp_resume(struct analogix_dp_device *dp);
 int analogix_dp_suspend(struct analogix_dp_device *dp);
 
 struct analogix_dp_device *
-analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
-		 struct analogix_dp_plat_data *plat_data);
+analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data);
+int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev);
 void analogix_dp_unbind(struct analogix_dp_device *dp);
+void analogix_dp_remove(struct analogix_dp_device *dp);
 
 int analogix_dp_start_crc(struct drm_connector *connector);
 int analogix_dp_stop_crc(struct drm_connector *connector);
-- 
2.17.1

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Re: [PATCH] drm/bridge: analogix_dp: Split bind() into probe() and real bind()

[Andrzej Hajda]

On 02.03.2020 15:26, Marek Szyprowski wrote:
> Analogix_dp driver acquires all its resources in ->bind() callback, what
> is a bit against the driver component based approach, where driver
> initialization is split into probe(), where all resources are gathered, and
> bind(), where objects are created and compound driver is initialized.
> Extract resource related operations to analogix_dp_probe() and
> analogix_dp_remove() and call them before/after registration of the device
> components from the main Exynos and Rockchip DP drivers.
>
> This fixes multiple tries of DRM compound driver bind() when example when
> DP PHY driver is not yet loaded/probed():
>
> [drm] Exynos DRM: using 14400000.fimd device for DMA mapping operations
> exynos-drm exynos-drm: bound 14400000.fimd (ops fimd_component_ops [exynosdrm])
> exynos-drm exynos-drm: bound 14450000.mixer (ops mixer_component_ops [exynosdrm])
> exynos-dp 145b0000.dp-controller: no DP phy configured
> exynos-drm exynos-drm: failed to bind 145b0000.dp-controller (ops exynos_dp_ops [exynosdrm]): -517
> exynos-drm exynos-drm: master bind failed: -517
> ...
> [drm] Exynos DRM: using 14400000.fimd device for DMA mapping operations
> exynos-drm exynos-drm: bound 14400000.fimd (ops hdmi_enable [exynosdrm])
> exynos-drm exynos-drm: bound 14450000.mixer (ops hdmi_enable [exynosdrm])
> exynos-drm exynos-drm: bound 145b0000.dp-controller (ops hdmi_enable [exynosdrm])
> exynos-drm exynos-drm: bound 14530000.hdmi (ops hdmi_enable [exynosdrm])
> [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
> Console: switching to colour frame buffer device 170x48
> exynos-drm exynos-drm: fb0: exynosdrmfb frame buffer device
> [drm] Initialized exynos 1.1.0 20180330 for exynos-drm on minor 1
> ...
>
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>


I hope someone with rockchip will test the patch.

I am little bit worried about power/resource management:

1. dp->clock enabled in probe.

2. pm_runtime enabled in bind.

Both seems to me too early, but it could be hw issue and should be
addressed in separate patches if possible.


As I understand the patch tries to split things without changing order
of calls, so for me it is OK:


Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>

 --

Regards
Andrzej

> ---
>  .../drm/bridge/analogix/analogix_dp_core.c    | 33 ++++++++++++-------
>  drivers/gpu/drm/exynos/exynos_dp.c            | 15 ++++++---
>  .../gpu/drm/rockchip/analogix_dp-rockchip.c   | 15 +++++----
>  include/drm/bridge/analogix_dp.h              |  5 +--
>  4 files changed, 44 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> index dfb59a5fefea..a89a03b66bf2 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -1646,8 +1646,7 @@ static ssize_t analogix_dpaux_transfer(struct drm_dp_aux *aux,
>  }
>  
>  struct analogix_dp_device *
> -analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
> -		 struct analogix_dp_plat_data *plat_data)
> +analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data)
>  {
>  	struct platform_device *pdev = to_platform_device(dev);
>  	struct analogix_dp_device *dp;
> @@ -1750,22 +1749,30 @@ analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
>  					irq_flags, "analogix-dp", dp);
>  	if (ret) {
>  		dev_err(&pdev->dev, "failed to request irq\n");
> -		goto err_disable_pm_runtime;
> +		return ERR_PTR(ret);
>  	}
>  	disable_irq(dp->irq);
>  
> +	return dp;
> +}
> +EXPORT_SYMBOL_GPL(analogix_dp_probe);
> +
> +int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev)
> +{
> +	int ret;
> +
>  	dp->drm_dev = drm_dev;
>  	dp->encoder = dp->plat_data->encoder;
>  
>  	dp->aux.name = "DP-AUX";
>  	dp->aux.transfer = analogix_dpaux_transfer;
> -	dp->aux.dev = &pdev->dev;
> +	dp->aux.dev = dp->dev;
>  
>  	ret = drm_dp_aux_register(&dp->aux);
>  	if (ret)
> -		return ERR_PTR(ret);
> +		return ret;
>  
> -	pm_runtime_enable(dev);
> +	pm_runtime_enable(dp->dev);
>  
>  	ret = analogix_dp_create_bridge(drm_dev, dp);
>  	if (ret) {
> @@ -1773,13 +1780,12 @@ analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
>  		goto err_disable_pm_runtime;
>  	}
>  
> -	return dp;
> +	return 0;
>  
>  err_disable_pm_runtime:
> +	pm_runtime_disable(dp->dev);
>  
> -	pm_runtime_disable(dev);
> -
> -	return ERR_PTR(ret);
> +	return ret;
>  }
>  EXPORT_SYMBOL_GPL(analogix_dp_bind);
>  
> @@ -1796,10 +1802,15 @@ void analogix_dp_unbind(struct analogix_dp_device *dp)
>  
>  	drm_dp_aux_unregister(&dp->aux);
>  	pm_runtime_disable(dp->dev);
> -	clk_disable_unprepare(dp->clock);
>  }
>  EXPORT_SYMBOL_GPL(analogix_dp_unbind);
>  
> +void analogix_dp_remove(struct analogix_dp_device *dp)
> +{
> +	clk_disable_unprepare(dp->clock);
> +}
> +EXPORT_SYMBOL_GPL(analogix_dp_remove);
> +
>  #ifdef CONFIG_PM
>  int analogix_dp_suspend(struct analogix_dp_device *dp)
>  {
> diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c
> index 4785885c0f4f..558b78e8cc32 100644
> --- a/drivers/gpu/drm/exynos/exynos_dp.c
> +++ b/drivers/gpu/drm/exynos/exynos_dp.c
> @@ -184,13 +184,11 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
>  
>  	dp->plat_data.encoder = encoder;
>  
> -	dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
> -	if (IS_ERR(dp->adp)) {
> +	ret = analogix_dp_bind(dp->adp, dp->drm_dev);
> +	if (ret)
>  		dp->encoder.funcs->destroy(&dp->encoder);
> -		return PTR_ERR(dp->adp);
> -	}
>  
> -	return 0;
> +	return ret;
>  }
>  
>  static void exynos_dp_unbind(struct device *dev, struct device *master,
> @@ -250,12 +248,19 @@ static int exynos_dp_probe(struct platform_device *pdev)
>  	dp->ptn_bridge = bridge;
>  
>  out:
> +	dp->adp = analogix_dp_probe(dev, &dp->plat_data);
> +	if (IS_ERR(dp->adp))
> +		return PTR_ERR(dp->adp);
> +
>  	return component_add(&pdev->dev, &exynos_dp_ops);
>  }
>  
>  static int exynos_dp_remove(struct platform_device *pdev)
>  {
> +	struct exynos_dp_device *dp = platform_get_drvdata(pdev);
> +
>  	component_del(&pdev->dev, &exynos_dp_ops);
> +	analogix_dp_remove(dp->adp);
>  
>  	return 0;
>  }
> diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> index f38f5e113c6b..b85cf2582864 100644
> --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> @@ -349,11 +349,9 @@ static int rockchip_dp_bind(struct device *dev, struct device *master,
>  	dp->plat_data.power_off = rockchip_dp_powerdown;
>  	dp->plat_data.get_modes = rockchip_dp_get_modes;
>  
> -	dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
> -	if (IS_ERR(dp->adp)) {
> -		ret = PTR_ERR(dp->adp);
> +	ret = analogix_dp_bind(dp->adp, drm_dev);
> +	if (ret)
>  		goto err_cleanup_encoder;
> -	}
>  
>  	return 0;
>  err_cleanup_encoder:
> @@ -368,8 +366,6 @@ static void rockchip_dp_unbind(struct device *dev, struct device *master,
>  
>  	analogix_dp_unbind(dp->adp);
>  	dp->encoder.funcs->destroy(&dp->encoder);
> -
> -	dp->adp = ERR_PTR(-ENODEV);
>  }
>  
>  static const struct component_ops rockchip_dp_component_ops = {
> @@ -402,12 +398,19 @@ static int rockchip_dp_probe(struct platform_device *pdev)
>  
>  	platform_set_drvdata(pdev, dp);
>  
> +	dp->adp = analogix_dp_probe(dev, &dp->plat_data);
> +	if (IS_ERR(dp->adp))
> +		return PTR_ERR(dp->adp);
> +
>  	return component_add(dev, &rockchip_dp_component_ops);
>  }
>  
>  static int rockchip_dp_remove(struct platform_device *pdev)
>  {
> +	struct rockchip_dp_device *dp = platform_get_drvdata(pdev);
> +
>  	component_del(&pdev->dev, &rockchip_dp_component_ops);
> +	analogix_dp_remove(dp->adp);
>  
>  	return 0;
>  }
> diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h
> index 7aa2f93da49c..b0dcc07334a1 100644
> --- a/include/drm/bridge/analogix_dp.h
> +++ b/include/drm/bridge/analogix_dp.h
> @@ -42,9 +42,10 @@ int analogix_dp_resume(struct analogix_dp_device *dp);
>  int analogix_dp_suspend(struct analogix_dp_device *dp);
>  
>  struct analogix_dp_device *
> -analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
> -		 struct analogix_dp_plat_data *plat_data);
> +analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data);
> +int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev);
>  void analogix_dp_unbind(struct analogix_dp_device *dp);
> +void analogix_dp_remove(struct analogix_dp_device *dp);
>  
>  int analogix_dp_start_crc(struct drm_connector *connector);
>  int analogix_dp_stop_crc(struct drm_connector *connector);


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Re: [PATCH] drm/bridge: analogix_dp: Split bind() into probe() and real bind()【请注意，邮件由linux-rockchip-bounces+andy.yan=rock-chips.com@lists.infradead.org代发】

[Andy Yan]

Hi:

I tested it on a rk3399 board, but the eDP was broken after this patch 
applied:


[    0.891873] registered taskstats version 1
[    0.892243] Loading compiled-in X.509 certificates
[    0.929147] rockchip-dp ff970000.edp: no DP phy configured
[    0.931676] random: fast init done
[    0.932594] rockchip-drm display-subsystem: bound ff900000.vop (ops 
vop_component_ops)
[    0.934117] rockchip-drm display-subsystem: bound ff970000.edp (ops 
rockchip_dp_component_ops)
[    0.934878] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    0.935459] [drm] No driver support for vblank timestamp query.
[    0.956708] mmc0: new HS400 MMC card at address 0001
[    0.958261] mmcblk0: mmc0:0001 AWPD3R 14.6 GiB
[    0.958952] mmcblk0boot0: mmc0:0001 AWPD3R partition 1 4.00 MiB
[    0.959804] mmcblk0boot1: mmc0:0001 AWPD3R partition 2 4.00 MiB
[    0.960540] mmcblk0rpmb: mmc0:0001 AWPD3R partition 3 4.00 MiB, 
chardev (242:0)
[    0.965428] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.966228] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.967025] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.967104]  mmcblk0: p1 p2 p3 p4 p5
[    0.967823] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.968620] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.969417] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.970216] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.971012] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.971811] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.972608] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.973404] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.974201] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.974998] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.975799] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.976596] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.977393] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.978189] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.978986] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.979786] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
[    0.980584] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)


Before this patch :


[    0.877707] 9pnet: Installing 9P2000 support
[    0.878156] Key type dns_resolver registered
[    0.879188] registered taskstats version 1
[    0.879558] Loading compiled-in X.509 certificates
[    0.918227] rockchip-drm display-subsystem: bound ff900000.vop (ops 
vop_component_ops)
[    0.918965] rockchip-dp ff970000.edp: no DP phy configured
[    0.921003] rockchip-drm display-subsystem: bound ff970000.edp (ops 
rockchip_dp_component_ops)
[    0.921766] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    0.922347] [drm] No driver support for vblank timestamp query.
[    0.922620] random: fast init done
[    0.944772] mmc0: new HS400 MMC card at address 0001
[    0.946330] mmcblk0: mmc0:0001 AWPD3R 14.6 GiB
[    0.947022] mmcblk0boot0: mmc0:0001 AWPD3R partition 1 4.00 MiB
[    0.947835] mmcblk0boot1: mmc0:0001 AWPD3R partition 2 4.00 MiB
[    0.948706] mmcblk0rpmb: mmc0:0001 AWPD3R partition 3 4.00 MiB, 
chardev (242:0)
[    0.948928] [drm] vop_crtc_atomic_enable
[    0.954614]  mmcblk0: p1 p2 p3 p4 p5
[    1.061071] Console: switching to colour frame buffer device 192x128
[    1.095819] rockchip-drm display-subsystem: fb0: rockchipdrmfb frame 
buffer device
[    1.098090] [drm] Initialized rockchip 1.0.0 20140818 for 
display-subsystem on minor 0
[    1.100342] hctosys: unable to open rtc device (rtc0)
75,1          Bot

On 3/3/20 8:38 PM, Andrzej Hajda wrote:
> On 02.03.2020 15:26, Marek Szyprowski wrote:
>> Analogix_dp driver acquires all its resources in ->bind() callback, what
>> is a bit against the driver component based approach, where driver
>> initialization is split into probe(), where all resources are gathered, and
>> bind(), where objects are created and compound driver is initialized.
>> Extract resource related operations to analogix_dp_probe() and
>> analogix_dp_remove() and call them before/after registration of the device
>> components from the main Exynos and Rockchip DP drivers.
>>
>> This fixes multiple tries of DRM compound driver bind() when example when
>> DP PHY driver is not yet loaded/probed():
>>
>> [drm] Exynos DRM: using 14400000.fimd device for DMA mapping operations
>> exynos-drm exynos-drm: bound 14400000.fimd (ops fimd_component_ops [exynosdrm])
>> exynos-drm exynos-drm: bound 14450000.mixer (ops mixer_component_ops [exynosdrm])
>> exynos-dp 145b0000.dp-controller: no DP phy configured
>> exynos-drm exynos-drm: failed to bind 145b0000.dp-controller (ops exynos_dp_ops [exynosdrm]): -517
>> exynos-drm exynos-drm: master bind failed: -517
>> ...
>> [drm] Exynos DRM: using 14400000.fimd device for DMA mapping operations
>> exynos-drm exynos-drm: bound 14400000.fimd (ops hdmi_enable [exynosdrm])
>> exynos-drm exynos-drm: bound 14450000.mixer (ops hdmi_enable [exynosdrm])
>> exynos-drm exynos-drm: bound 145b0000.dp-controller (ops hdmi_enable [exynosdrm])
>> exynos-drm exynos-drm: bound 14530000.hdmi (ops hdmi_enable [exynosdrm])
>> [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
>> Console: switching to colour frame buffer device 170x48
>> exynos-drm exynos-drm: fb0: exynosdrmfb frame buffer device
>> [drm] Initialized exynos 1.1.0 20180330 for exynos-drm on minor 1
>> ...
>>
>> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
>
> I hope someone with rockchip will test the patch.
>
> I am little bit worried about power/resource management:
>
> 1. dp->clock enabled in probe.
>
> 2. pm_runtime enabled in bind.
>
> Both seems to me too early, but it could be hw issue and should be
> addressed in separate patches if possible.
>
>
> As I understand the patch tries to split things without changing order
> of calls, so for me it is OK:
>
>
> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
>
>   --
>
> Regards
> Andrzej
>
>> ---
>>   .../drm/bridge/analogix/analogix_dp_core.c    | 33 ++++++++++++-------
>>   drivers/gpu/drm/exynos/exynos_dp.c            | 15 ++++++---
>>   .../gpu/drm/rockchip/analogix_dp-rockchip.c   | 15 +++++----
>>   include/drm/bridge/analogix_dp.h              |  5 +--
>>   4 files changed, 44 insertions(+), 24 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
>> index dfb59a5fefea..a89a03b66bf2 100644
>> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
>> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
>> @@ -1646,8 +1646,7 @@ static ssize_t analogix_dpaux_transfer(struct drm_dp_aux *aux,
>>   }
>>   
>>   struct analogix_dp_device *
>> -analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
>> -		 struct analogix_dp_plat_data *plat_data)
>> +analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data)
>>   {
>>   	struct platform_device *pdev = to_platform_device(dev);
>>   	struct analogix_dp_device *dp;
>> @@ -1750,22 +1749,30 @@ analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
>>   					irq_flags, "analogix-dp", dp);
>>   	if (ret) {
>>   		dev_err(&pdev->dev, "failed to request irq\n");
>> -		goto err_disable_pm_runtime;
>> +		return ERR_PTR(ret);
>>   	}
>>   	disable_irq(dp->irq);
>>   
>> +	return dp;
>> +}
>> +EXPORT_SYMBOL_GPL(analogix_dp_probe);
>> +
>> +int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev)
>> +{
>> +	int ret;
>> +
>>   	dp->drm_dev = drm_dev;
>>   	dp->encoder = dp->plat_data->encoder;
>>   
>>   	dp->aux.name = "DP-AUX";
>>   	dp->aux.transfer = analogix_dpaux_transfer;
>> -	dp->aux.dev = &pdev->dev;
>> +	dp->aux.dev = dp->dev;
>>   
>>   	ret = drm_dp_aux_register(&dp->aux);
>>   	if (ret)
>> -		return ERR_PTR(ret);
>> +		return ret;
>>   
>> -	pm_runtime_enable(dev);
>> +	pm_runtime_enable(dp->dev);
>>   
>>   	ret = analogix_dp_create_bridge(drm_dev, dp);
>>   	if (ret) {
>> @@ -1773,13 +1780,12 @@ analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
>>   		goto err_disable_pm_runtime;
>>   	}
>>   
>> -	return dp;
>> +	return 0;
>>   
>>   err_disable_pm_runtime:
>> +	pm_runtime_disable(dp->dev);
>>   
>> -	pm_runtime_disable(dev);
>> -
>> -	return ERR_PTR(ret);
>> +	return ret;
>>   }
>>   EXPORT_SYMBOL_GPL(analogix_dp_bind);
>>   
>> @@ -1796,10 +1802,15 @@ void analogix_dp_unbind(struct analogix_dp_device *dp)
>>   
>>   	drm_dp_aux_unregister(&dp->aux);
>>   	pm_runtime_disable(dp->dev);
>> -	clk_disable_unprepare(dp->clock);
>>   }
>>   EXPORT_SYMBOL_GPL(analogix_dp_unbind);
>>   
>> +void analogix_dp_remove(struct analogix_dp_device *dp)
>> +{
>> +	clk_disable_unprepare(dp->clock);
>> +}
>> +EXPORT_SYMBOL_GPL(analogix_dp_remove);
>> +
>>   #ifdef CONFIG_PM
>>   int analogix_dp_suspend(struct analogix_dp_device *dp)
>>   {
>> diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c
>> index 4785885c0f4f..558b78e8cc32 100644
>> --- a/drivers/gpu/drm/exynos/exynos_dp.c
>> +++ b/drivers/gpu/drm/exynos/exynos_dp.c
>> @@ -184,13 +184,11 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
>>   
>>   	dp->plat_data.encoder = encoder;
>>   
>> -	dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
>> -	if (IS_ERR(dp->adp)) {
>> +	ret = analogix_dp_bind(dp->adp, dp->drm_dev);
>> +	if (ret)
>>   		dp->encoder.funcs->destroy(&dp->encoder);
>> -		return PTR_ERR(dp->adp);
>> -	}
>>   
>> -	return 0;
>> +	return ret;
>>   }
>>   
>>   static void exynos_dp_unbind(struct device *dev, struct device *master,
>> @@ -250,12 +248,19 @@ static int exynos_dp_probe(struct platform_device *pdev)
>>   	dp->ptn_bridge = bridge;
>>   
>>   out:
>> +	dp->adp = analogix_dp_probe(dev, &dp->plat_data);
>> +	if (IS_ERR(dp->adp))
>> +		return PTR_ERR(dp->adp);
>> +
>>   	return component_add(&pdev->dev, &exynos_dp_ops);
>>   }
>>   
>>   static int exynos_dp_remove(struct platform_device *pdev)
>>   {
>> +	struct exynos_dp_device *dp = platform_get_drvdata(pdev);
>> +
>>   	component_del(&pdev->dev, &exynos_dp_ops);
>> +	analogix_dp_remove(dp->adp);
>>   
>>   	return 0;
>>   }
>> diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
>> index f38f5e113c6b..b85cf2582864 100644
>> --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
>> +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
>> @@ -349,11 +349,9 @@ static int rockchip_dp_bind(struct device *dev, struct device *master,
>>   	dp->plat_data.power_off = rockchip_dp_powerdown;
>>   	dp->plat_data.get_modes = rockchip_dp_get_modes;
>>   
>> -	dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
>> -	if (IS_ERR(dp->adp)) {
>> -		ret = PTR_ERR(dp->adp);
>> +	ret = analogix_dp_bind(dp->adp, drm_dev);
>> +	if (ret)
>>   		goto err_cleanup_encoder;
>> -	}
>>   
>>   	return 0;
>>   err_cleanup_encoder:
>> @@ -368,8 +366,6 @@ static void rockchip_dp_unbind(struct device *dev, struct device *master,
>>   
>>   	analogix_dp_unbind(dp->adp);
>>   	dp->encoder.funcs->destroy(&dp->encoder);
>> -
>> -	dp->adp = ERR_PTR(-ENODEV);
>>   }
>>   
>>   static const struct component_ops rockchip_dp_component_ops = {
>> @@ -402,12 +398,19 @@ static int rockchip_dp_probe(struct platform_device *pdev)
>>   
>>   	platform_set_drvdata(pdev, dp);
>>   
>> +	dp->adp = analogix_dp_probe(dev, &dp->plat_data);
>> +	if (IS_ERR(dp->adp))
>> +		return PTR_ERR(dp->adp);
>> +
>>   	return component_add(dev, &rockchip_dp_component_ops);
>>   }
>>   
>>   static int rockchip_dp_remove(struct platform_device *pdev)
>>   {
>> +	struct rockchip_dp_device *dp = platform_get_drvdata(pdev);
>> +
>>   	component_del(&pdev->dev, &rockchip_dp_component_ops);
>> +	analogix_dp_remove(dp->adp);
>>   
>>   	return 0;
>>   }
>> diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h
>> index 7aa2f93da49c..b0dcc07334a1 100644
>> --- a/include/drm/bridge/analogix_dp.h
>> +++ b/include/drm/bridge/analogix_dp.h
>> @@ -42,9 +42,10 @@ int analogix_dp_resume(struct analogix_dp_device *dp);
>>   int analogix_dp_suspend(struct analogix_dp_device *dp);
>>   
>>   struct analogix_dp_device *
>> -analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
>> -		 struct analogix_dp_plat_data *plat_data);
>> +analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data);
>> +int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev);
>>   void analogix_dp_unbind(struct analogix_dp_device *dp);
>> +void analogix_dp_remove(struct analogix_dp_device *dp);
>>   
>>   int analogix_dp_start_crc(struct drm_connector *connector);
>>   int analogix_dp_stop_crc(struct drm_connector *connector);
>
>
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip


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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH] drm/bridge: analogix_dp: Split bind() into probe() and real bind()【请注意，邮件由linux-rockchip-bounces+andy.yan=rock-chips.com@lists.infradead.org代发】

[Marek Szyprowski]

Hi Andy

On 05.03.2020 10:03, Andy Yan wrote:
>
> I tested it on a rk3399 board, but the eDP was broken after this patch 
> applied:
>
>
> [    0.891873] registered taskstats version 1
> [    0.892243] Loading compiled-in X.509 certificates
> [    0.929147] rockchip-dp ff970000.edp: no DP phy configured
> [    0.931676] random: fast init done
> [    0.932594] rockchip-drm display-subsystem: bound ff900000.vop (ops 
> vop_component_ops)
> [    0.934117] rockchip-drm display-subsystem: bound ff970000.edp (ops 
> rockchip_dp_component_ops)
> [    0.934878] [drm] Supports vblank timestamp caching Rev 2 
> (21.10.2013).
> [    0.935459] [drm] No driver support for vblank timestamp query.
> [    0.956708] mmc0: new HS400 MMC card at address 0001
> [    0.958261] mmcblk0: mmc0:0001 AWPD3R 14.6 GiB
> [    0.958952] mmcblk0boot0: mmc0:0001 AWPD3R partition 1 4.00 MiB
> [    0.959804] mmcblk0boot1: mmc0:0001 AWPD3R partition 2 4.00 MiB
> [    0.960540] mmcblk0rpmb: mmc0:0001 AWPD3R partition 3 4.00 MiB, 
> chardev (242:0)
> [    0.965428] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.966228] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.967025] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.967104]  mmcblk0: p1 p2 p3 p4 p5
> [    0.967823] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.968620] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.969417] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.970216] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.971012] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.971811] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.972608] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.973404] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.974201] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.974998] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.975799] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.976596] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.977393] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.978189] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.978986] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.979786] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.980584] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
>
Thanks for the tests. I will check the code again, although I've tried 
not to change the code flow at all... If anyone has a suggestion what to 
check, let me know.

 > [...]

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland

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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH] drm/bridge: analogix_dp: Split bind() into probe() and real bind()【请注意，邮件由linux-rockchip-bounces+andy.yan=rock-chips.com@lists.infradead.org代发】

[Andy Yan]

Hi Marek:


On 3/5/20 5:03 PM, Andy Yan wrote:
>
> Hi:
>
> I tested it on a rk3399 board, but the eDP was broken after this patch 
> applied:
>
>
> [    0.891873] registered taskstats version 1
> [    0.892243] Loading compiled-in X.509 certificates
> [    0.929147] rockchip-dp ff970000.edp: no DP phy configured
> [    0.931676] random: fast init done
> [    0.932594] rockchip-drm display-subsystem: bound ff900000.vop (ops 
> vop_component_ops)
> [    0.934117] rockchip-drm display-subsystem: bound ff970000.edp (ops 
> rockchip_dp_component_ops)
> [    0.934878] [drm] Supports vblank timestamp caching Rev 2 
> (21.10.2013).
> [    0.935459] [drm] No driver support for vblank timestamp query.
> [    0.956708] mmc0: new HS400 MMC card at address 0001
> [    0.958261] mmcblk0: mmc0:0001 AWPD3R 14.6 GiB
> [    0.958952] mmcblk0boot0: mmc0:0001 AWPD3R partition 1 4.00 MiB
> [    0.959804] mmcblk0boot1: mmc0:0001 AWPD3R partition 2 4.00 MiB
> [    0.960540] mmcblk0rpmb: mmc0:0001 AWPD3R partition 3 4.00 MiB, 
> chardev (242:0)
> [    0.965428] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.966228] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.967025] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.967104]  mmcblk0: p1 p2 p3 p4 p5
> [    0.967823] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.968620] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.969417] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.970216] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.971012] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.971811] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.972608] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.973404] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.974201] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.974998] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.975799] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.976596] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.977393] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.978189] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.978986] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.979786] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
> [    0.980584] rockchip-dp ff970000.edp: AUX CH error happened: 0x7 (1)
>
>
> Before this patch :
>
>
> [    0.877707] 9pnet: Installing 9P2000 support
> [    0.878156] Key type dns_resolver registered
> [    0.879188] registered taskstats version 1
> [    0.879558] Loading compiled-in X.509 certificates
> [    0.918227] rockchip-drm display-subsystem: bound ff900000.vop (ops 
> vop_component_ops)
> [    0.918965] rockchip-dp ff970000.edp: no DP phy configured
> [    0.921003] rockchip-drm display-subsystem: bound ff970000.edp (ops 
> rockchip_dp_component_ops)
> [    0.921766] [drm] Supports vblank timestamp caching Rev 2 
> (21.10.2013).
> [    0.922347] [drm] No driver support for vblank timestamp query.
> [    0.922620] random: fast init done
> [    0.944772] mmc0: new HS400 MMC card at address 0001
> [    0.946330] mmcblk0: mmc0:0001 AWPD3R 14.6 GiB
> [    0.947022] mmcblk0boot0: mmc0:0001 AWPD3R partition 1 4.00 MiB
> [    0.947835] mmcblk0boot1: mmc0:0001 AWPD3R partition 2 4.00 MiB
> [    0.948706] mmcblk0rpmb: mmc0:0001 AWPD3R partition 3 4.00 MiB, 
> chardev (242:0)
> [    0.948928] [drm] vop_crtc_atomic_enable
> [    0.954614]  mmcblk0: p1 p2 p3 p4 p5
> [    1.061071] Console: switching to colour frame buffer device 192x128
> [    1.095819] rockchip-drm display-subsystem: fb0: rockchipdrmfb 
> frame buffer device
> [    1.098090] [drm] Initialized rockchip 1.0.0 20140818 for 
> display-subsystem on minor 0
> [    1.100342] hctosys: unable to open rtc device (rtc0)
> 75,1          Bot
>
> On 3/3/20 8:38 PM, Andrzej Hajda wrote:
>> On 02.03.2020 15:26, Marek Szyprowski wrote:
>>> Analogix_dp driver acquires all its resources in ->bind() callback, 
>>> what
>>> is a bit against the driver component based approach, where driver
>>> initialization is split into probe(), where all resources are 
>>> gathered, and
>>> bind(), where objects are created and compound driver is initialized.
>>> Extract resource related operations to analogix_dp_probe() and
>>> analogix_dp_remove() and call them before/after registration of the 
>>> device
>>> components from the main Exynos and Rockchip DP drivers.
>>>
>>> This fixes multiple tries of DRM compound driver bind() when example 
>>> when
>>> DP PHY driver is not yet loaded/probed():
>>>
>>> [drm] Exynos DRM: using 14400000.fimd device for DMA mapping operations
>>> exynos-drm exynos-drm: bound 14400000.fimd (ops fimd_component_ops 
>>> [exynosdrm])
>>> exynos-drm exynos-drm: bound 14450000.mixer (ops mixer_component_ops 
>>> [exynosdrm])
>>> exynos-dp 145b0000.dp-controller: no DP phy configured
>>> exynos-drm exynos-drm: failed to bind 145b0000.dp-controller (ops 
>>> exynos_dp_ops [exynosdrm]): -517
>>> exynos-drm exynos-drm: master bind failed: -517
>>> ...
>>> [drm] Exynos DRM: using 14400000.fimd device for DMA mapping operations
>>> exynos-drm exynos-drm: bound 14400000.fimd (ops hdmi_enable 
>>> [exynosdrm])
>>> exynos-drm exynos-drm: bound 14450000.mixer (ops hdmi_enable 
>>> [exynosdrm])
>>> exynos-drm exynos-drm: bound 145b0000.dp-controller (ops hdmi_enable 
>>> [exynosdrm])
>>> exynos-drm exynos-drm: bound 14530000.hdmi (ops hdmi_enable 
>>> [exynosdrm])
>>> [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
>>> Console: switching to colour frame buffer device 170x48
>>> exynos-drm exynos-drm: fb0: exynosdrmfb frame buffer device
>>> [drm] Initialized exynos 1.1.0 20180330 for exynos-drm on minor 1
>>> ...
>>>
>>> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
>>
>> I hope someone with rockchip will test the patch.
>>
>> I am little bit worried about power/resource management:
>>
>> 1. dp->clock enabled in probe.
>>
>> 2. pm_runtime enabled in bind.
>>
>> Both seems to me too early, but it could be hw issue and should be
>> addressed in separate patches if possible.
>>
>>
>> As I understand the patch tries to split things without changing order
>> of calls, so for me it is OK:
>>
>>
>> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
>>
>>   --
>>
>> Regards
>> Andrzej
>>
>>> ---
>>>   .../drm/bridge/analogix/analogix_dp_core.c    | 33 
>>> ++++++++++++-------
>>>   drivers/gpu/drm/exynos/exynos_dp.c            | 15 ++++++---
>>>   .../gpu/drm/rockchip/analogix_dp-rockchip.c   | 15 +++++----
>>>   include/drm/bridge/analogix_dp.h              |  5 +--
>>>   4 files changed, 44 insertions(+), 24 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c 
>>> b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
>>> index dfb59a5fefea..a89a03b66bf2 100644
>>> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
>>> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
>>> @@ -1646,8 +1646,7 @@ static ssize_t analogix_dpaux_transfer(struct 
>>> drm_dp_aux *aux,
>>>   }
>>>     struct analogix_dp_device *
>>> -analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
>>> -         struct analogix_dp_plat_data *plat_data)
>>> +analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data 
>>> *plat_data)
>>>   {
>>>       struct platform_device *pdev = to_platform_device(dev);
>>>       struct analogix_dp_device *dp;

          ret = analogix_dp_dt_parse_pdata(dp);
         if (ret)
                 return ERR_PTR(ret);


     I think this is the problem I tested。 Now the pdata were parse in 
probe, but the plata_data->dev_type was populated in 
rockchip_dp_bind/exynos_dp_bind after probe.So we can't parse the right 
configuration here.



>>> @@ -1750,22 +1749,30 @@ analogix_dp_bind(struct device *dev, struct 
>>> drm_device *drm_dev,
>>>                       irq_flags, "analogix-dp", dp);
>>>       if (ret) {
>>>           dev_err(&pdev->dev, "failed to request irq\n");
>>> -        goto err_disable_pm_runtime;
>>> +        return ERR_PTR(ret);
>>>       }
>>>       disable_irq(dp->irq);
>>>   +    return dp;
>>> +}
>>> +EXPORT_SYMBOL_GPL(analogix_dp_probe);
>>> +
>>> +int analogix_dp_bind(struct analogix_dp_device *dp, struct 
>>> drm_device *drm_dev)
>>> +{
>>> +    int ret;
>>> +
>>>       dp->drm_dev = drm_dev;
>>>       dp->encoder = dp->plat_data->encoder;
>>>         dp->aux.name = "DP-AUX";
>>>       dp->aux.transfer = analogix_dpaux_transfer;
>>> -    dp->aux.dev = &pdev->dev;
>>> +    dp->aux.dev = dp->dev;
>>>         ret = drm_dp_aux_register(&dp->aux);
>>>       if (ret)
>>> -        return ERR_PTR(ret);
>>> +        return ret;
>>>   -    pm_runtime_enable(dev);
>>> +    pm_runtime_enable(dp->dev);
>>>         ret = analogix_dp_create_bridge(drm_dev, dp);
>>>       if (ret) {
>>> @@ -1773,13 +1780,12 @@ analogix_dp_bind(struct device *dev, struct 
>>> drm_device *drm_dev,
>>>           goto err_disable_pm_runtime;
>>>       }
>>>   -    return dp;
>>> +    return 0;
>>>     err_disable_pm_runtime:
>>> +    pm_runtime_disable(dp->dev);
>>>   -    pm_runtime_disable(dev);
>>> -
>>> -    return ERR_PTR(ret);
>>> +    return ret;
>>>   }
>>>   EXPORT_SYMBOL_GPL(analogix_dp_bind);
>>>   @@ -1796,10 +1802,15 @@ void analogix_dp_unbind(struct 
>>> analogix_dp_device *dp)
>>>         drm_dp_aux_unregister(&dp->aux);
>>>       pm_runtime_disable(dp->dev);
>>> -    clk_disable_unprepare(dp->clock);
>>>   }
>>>   EXPORT_SYMBOL_GPL(analogix_dp_unbind);
>>>   +void analogix_dp_remove(struct analogix_dp_device *dp)
>>> +{
>>> +    clk_disable_unprepare(dp->clock);
>>> +}
>>> +EXPORT_SYMBOL_GPL(analogix_dp_remove);
>>> +
>>>   #ifdef CONFIG_PM
>>>   int analogix_dp_suspend(struct analogix_dp_device *dp)
>>>   {
>>> diff --git a/drivers/gpu/drm/exynos/exynos_dp.c 
>>> b/drivers/gpu/drm/exynos/exynos_dp.c
>>> index 4785885c0f4f..558b78e8cc32 100644
>>> --- a/drivers/gpu/drm/exynos/exynos_dp.c
>>> +++ b/drivers/gpu/drm/exynos/exynos_dp.c
>>> @@ -184,13 +184,11 @@ static int exynos_dp_bind(struct device *dev, 
>>> struct device *master, void *data)
>>>         dp->plat_data.encoder = encoder;
>>>   -    dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
>>> -    if (IS_ERR(dp->adp)) {
>>> +    ret = analogix_dp_bind(dp->adp, dp->drm_dev);
>>> +    if (ret)
>>> dp->encoder.funcs->destroy(&dp->encoder);
>>> -        return PTR_ERR(dp->adp);
>>> -    }
>>>   -    return 0;
>>> +    return ret;
>>>   }
>>>     static void exynos_dp_unbind(struct device *dev, struct device 
>>> *master,
>>> @@ -250,12 +248,19 @@ static int exynos_dp_probe(struct 
>>> platform_device *pdev)
>>>       dp->ptn_bridge = bridge;
>>>     out:
>>> +    dp->adp = analogix_dp_probe(dev, &dp->plat_data);
>>> +    if (IS_ERR(dp->adp))
>>> +        return PTR_ERR(dp->adp);
>>> +
>>>       return component_add(&pdev->dev, &exynos_dp_ops);
>>>   }
>>>     static int exynos_dp_remove(struct platform_device *pdev)
>>>   {
>>> +    struct exynos_dp_device *dp = platform_get_drvdata(pdev);
>>> +
>>>       component_del(&pdev->dev, &exynos_dp_ops);
>>> +    analogix_dp_remove(dp->adp);
>>>         return 0;
>>>   }
>>> diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c 
>>> b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
>>> index f38f5e113c6b..b85cf2582864 100644
>>> --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
>>> +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
>>> @@ -349,11 +349,9 @@ static int rockchip_dp_bind(struct device *dev, 
>>> struct device *master,
>>>       dp->plat_data.power_off = rockchip_dp_powerdown;
>>>       dp->plat_data.get_modes = rockchip_dp_get_modes;
>>>   -    dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
>>> -    if (IS_ERR(dp->adp)) {
>>> -        ret = PTR_ERR(dp->adp);
>>> +    ret = analogix_dp_bind(dp->adp, drm_dev);
>>> +    if (ret)
>>>           goto err_cleanup_encoder;
>>> -    }
>>>         return 0;
>>>   err_cleanup_encoder:
>>> @@ -368,8 +366,6 @@ static void rockchip_dp_unbind(struct device 
>>> *dev, struct device *master,
>>>         analogix_dp_unbind(dp->adp);
>>>       dp->encoder.funcs->destroy(&dp->encoder);
>>> -
>>> -    dp->adp = ERR_PTR(-ENODEV);
>>>   }
>>>     static const struct component_ops rockchip_dp_component_ops = {
>>> @@ -402,12 +398,19 @@ static int rockchip_dp_probe(struct 
>>> platform_device *pdev)
>>>         platform_set_drvdata(pdev, dp);
>>>   +    dp->adp = analogix_dp_probe(dev, &dp->plat_data);
>>> +    if (IS_ERR(dp->adp))
>>> +        return PTR_ERR(dp->adp);
>>> +
>>>       return component_add(dev, &rockchip_dp_component_ops);
>>>   }
>>>     static int rockchip_dp_remove(struct platform_device *pdev)
>>>   {
>>> +    struct rockchip_dp_device *dp = platform_get_drvdata(pdev);
>>> +
>>>       component_del(&pdev->dev, &rockchip_dp_component_ops);
>>> +    analogix_dp_remove(dp->adp);
>>>         return 0;
>>>   }
>>> diff --git a/include/drm/bridge/analogix_dp.h 
>>> b/include/drm/bridge/analogix_dp.h
>>> index 7aa2f93da49c..b0dcc07334a1 100644
>>> --- a/include/drm/bridge/analogix_dp.h
>>> +++ b/include/drm/bridge/analogix_dp.h
>>> @@ -42,9 +42,10 @@ int analogix_dp_resume(struct analogix_dp_device 
>>> *dp);
>>>   int analogix_dp_suspend(struct analogix_dp_device *dp);
>>>     struct analogix_dp_device *
>>> -analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
>>> -         struct analogix_dp_plat_data *plat_data);
>>> +analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data 
>>> *plat_data);
>>> +int analogix_dp_bind(struct analogix_dp_device *dp, struct 
>>> drm_device *drm_dev);
>>>   void analogix_dp_unbind(struct analogix_dp_device *dp);
>>> +void analogix_dp_remove(struct analogix_dp_device *dp);
>>>     int analogix_dp_start_crc(struct drm_connector *connector);
>>>   int analogix_dp_stop_crc(struct drm_connector *connector);
>>
>>
>> _______________________________________________
>> Linux-rockchip mailing list
>> Linux-rockchip@lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-rockchip
>
>
>
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip


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Re: [PATCH] drm/bridge: analogix_dp: Split bind() into probe() and real bind()

[Marek Szyprowski]

Hi Andy,

On 10.03.2020 02:10, Andy Yan wrote:
> [...]

> ret = analogix_dp_dt_parse_pdata(dp);
>         if (ret)
>                 return ERR_PTR(ret);
>
>
>     I think this is the problem I tested. Now the pdata were parse in 
> probe, but the plata_data->dev_type was populated in 
> rockchip_dp_bind/exynos_dp_bind after probe.So we can't parse the 
> right configuration here.

Indeed, plat_data wasn't properly initialized. Thanks for finding it 
out! I will send v2 in a few minutes.

 > [...]

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland

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