subject:"\[PATCH v3 4\/4\] drm\/rockchip\: support dp training outside dp firmware"

Re: [PATCH v3 4/4] drm/rockchip: support dp training outside dp firmware

2018-05-14 Thread Sean Paul

On Mon, May 14, 2018 at 05:53:55PM +0800, Lin Huang wrote:
> DP firmware uses fixed phy config values to do training, but some
> boards need to adjust these values to fit for their unique hardware
> design. So if the phy is using custom config values, do software
> link training instead of relying on firmware, if software training
> fail, keep firmware training as a fallback if sw training fails.
> 
> Signed-off-by: Chris Zhong 
> Signed-off-by: Lin Huang 
> ---
> Changes in v2:
> - update patch following Enric suggest
> Changes in v3:
> - use variable fw_training instead sw_training_success
> - base on DP SPCE, if training fail use lower link rate to retry training
> 
>  drivers/gpu/drm/rockchip/Makefile   |   3 +-
>  drivers/gpu/drm/rockchip/cdn-dp-core.c  |  24 +-
>  drivers/gpu/drm/rockchip/cdn-dp-core.h  |   2 +
>  drivers/gpu/drm/rockchip/cdn-dp-link-training.c | 416 
> 
>  drivers/gpu/drm/rockchip/cdn-dp-reg.c   |  31 +-
>  drivers/gpu/drm/rockchip/cdn-dp-reg.h   |  38 ++-
>  6 files changed, 501 insertions(+), 13 deletions(-)
>  create mode 100644 drivers/gpu/drm/rockchip/cdn-dp-link-training.c
> 
> diff --git a/drivers/gpu/drm/rockchip/Makefile 
> b/drivers/gpu/drm/rockchip/Makefile
> index a314e21..b932f62 100644
> --- a/drivers/gpu/drm/rockchip/Makefile
> +++ b/drivers/gpu/drm/rockchip/Makefile
> @@ -9,7 +9,8 @@ rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o \
>  rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o
>  
>  rockchipdrm-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o
> -rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o
> +rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o \
> + cdn-dp-link-training.o
>  rockchipdrm-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
>  rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o
>  rockchipdrm-$(CONFIG_ROCKCHIP_INNO_HDMI) += inno_hdmi.o
> diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c 
> b/drivers/gpu/drm/rockchip/cdn-dp-core.c
> index cce64c1..d9d0d4d 100644
> --- a/drivers/gpu/drm/rockchip/cdn-dp-core.c
> +++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
> @@ -629,11 +629,13 @@ static void cdn_dp_encoder_enable(struct drm_encoder 
> *encoder)
>   goto out;
>   }
>   }
> -
> - ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
> - if (ret) {
> - DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
> - goto out;
> + if (dp->use_fw_training == true) {
> + ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
> + if (ret) {
> + DRM_DEV_ERROR(dp->dev,
> +   "Failed to idle video %d\n", ret);
> + goto out;
> + }
>   }
>  
>   ret = cdn_dp_config_video(dp);
> @@ -642,11 +644,15 @@ static void cdn_dp_encoder_enable(struct drm_encoder 
> *encoder)
>   goto out;
>   }
>  
> - ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
> - if (ret) {
> - DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
> - goto out;
> + if (dp->use_fw_training == true) {
> + ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
> + if (ret) {
> + DRM_DEV_ERROR(dp->dev,
> + "Failed to valid video %d\n", ret);
> + goto out;
> + }
>   }
> +
>  out:
>   mutex_unlock(>lock);
>  }
> diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.h 
> b/drivers/gpu/drm/rockchip/cdn-dp-core.h
> index 46159b2..77a9793 100644
> --- a/drivers/gpu/drm/rockchip/cdn-dp-core.h
> +++ b/drivers/gpu/drm/rockchip/cdn-dp-core.h
> @@ -84,6 +84,7 @@ struct cdn_dp_device {
>   bool connected;
>   bool active;
>   bool suspended;
> + bool use_fw_training;
>  
>   const struct firmware *fw;  /* cdn dp firmware */
>   unsigned int fw_version;/* cdn fw version */
> @@ -106,6 +107,7 @@ struct cdn_dp_device {
>   u8 ports;
>   u8 lanes;
>   int active_port;
> + u8 train_set[4];
>  
>   u8 dpcd[DP_RECEIVER_CAP_SIZE];
>   bool sink_has_audio;
> diff --git a/drivers/gpu/drm/rockchip/cdn-dp-link-training.c 
> b/drivers/gpu/drm/rockchip/cdn-dp-link-training.c
> new file mode 100644
> index 000..b8fd5bc
> --- /dev/null
> +++ b/drivers/gpu/drm/rockchip/cdn-dp-link-training.c

/snip

> +static int cdn_dp_get_lower_link_rate(struct cdn_dp_device *dp)
> +{
> + if (dp->link.rate == DP_LINK_BW_1_62)
> + return -EINVAL;
> + else if (dp->link.rate == DP_LINK_BW_2_7)
> + dp->link.rate = DP_LINK_BW_1_62;

Extra indent

> + else
> + dp->link.rate = DP_LINK_BW_2_7;


This is better expressed as a switch statement:


switch

Re: [PATCH v3 4/4] drm/rockchip: support dp training outside dp firmware

2018-05-14 Thread Sean Paul

On Mon, May 14, 2018 at 05:53:55PM +0800, Lin Huang wrote:
> DP firmware uses fixed phy config values to do training, but some
> boards need to adjust these values to fit for their unique hardware
> design. So if the phy is using custom config values, do software
> link training instead of relying on firmware, if software training
> fail, keep firmware training as a fallback if sw training fails.
> 
> Signed-off-by: Chris Zhong 
> Signed-off-by: Lin Huang 
> ---
> Changes in v2:
> - update patch following Enric suggest
> Changes in v3:
> - use variable fw_training instead sw_training_success
> - base on DP SPCE, if training fail use lower link rate to retry training
> 
>  drivers/gpu/drm/rockchip/Makefile   |   3 +-
>  drivers/gpu/drm/rockchip/cdn-dp-core.c  |  24 +-
>  drivers/gpu/drm/rockchip/cdn-dp-core.h  |   2 +
>  drivers/gpu/drm/rockchip/cdn-dp-link-training.c | 416 
> 
>  drivers/gpu/drm/rockchip/cdn-dp-reg.c   |  31 +-
>  drivers/gpu/drm/rockchip/cdn-dp-reg.h   |  38 ++-
>  6 files changed, 501 insertions(+), 13 deletions(-)
>  create mode 100644 drivers/gpu/drm/rockchip/cdn-dp-link-training.c
> 
> diff --git a/drivers/gpu/drm/rockchip/Makefile 
> b/drivers/gpu/drm/rockchip/Makefile
> index a314e21..b932f62 100644
> --- a/drivers/gpu/drm/rockchip/Makefile
> +++ b/drivers/gpu/drm/rockchip/Makefile
> @@ -9,7 +9,8 @@ rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o \
>  rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o
>  
>  rockchipdrm-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o
> -rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o
> +rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o \
> + cdn-dp-link-training.o
>  rockchipdrm-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
>  rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o
>  rockchipdrm-$(CONFIG_ROCKCHIP_INNO_HDMI) += inno_hdmi.o
> diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c 
> b/drivers/gpu/drm/rockchip/cdn-dp-core.c
> index cce64c1..d9d0d4d 100644
> --- a/drivers/gpu/drm/rockchip/cdn-dp-core.c
> +++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
> @@ -629,11 +629,13 @@ static void cdn_dp_encoder_enable(struct drm_encoder 
> *encoder)
>   goto out;
>   }
>   }
> -
> - ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
> - if (ret) {
> - DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
> - goto out;
> + if (dp->use_fw_training == true) {
> + ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
> + if (ret) {
> + DRM_DEV_ERROR(dp->dev,
> +   "Failed to idle video %d\n", ret);
> + goto out;
> + }
>   }
>  
>   ret = cdn_dp_config_video(dp);
> @@ -642,11 +644,15 @@ static void cdn_dp_encoder_enable(struct drm_encoder 
> *encoder)
>   goto out;
>   }
>  
> - ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
> - if (ret) {
> - DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
> - goto out;
> + if (dp->use_fw_training == true) {
> + ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
> + if (ret) {
> + DRM_DEV_ERROR(dp->dev,
> + "Failed to valid video %d\n", ret);
> + goto out;
> + }
>   }
> +
>  out:
>   mutex_unlock(>lock);
>  }
> diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.h 
> b/drivers/gpu/drm/rockchip/cdn-dp-core.h
> index 46159b2..77a9793 100644
> --- a/drivers/gpu/drm/rockchip/cdn-dp-core.h
> +++ b/drivers/gpu/drm/rockchip/cdn-dp-core.h
> @@ -84,6 +84,7 @@ struct cdn_dp_device {
>   bool connected;
>   bool active;
>   bool suspended;
> + bool use_fw_training;
>  
>   const struct firmware *fw;  /* cdn dp firmware */
>   unsigned int fw_version;/* cdn fw version */
> @@ -106,6 +107,7 @@ struct cdn_dp_device {
>   u8 ports;
>   u8 lanes;
>   int active_port;
> + u8 train_set[4];
>  
>   u8 dpcd[DP_RECEIVER_CAP_SIZE];
>   bool sink_has_audio;
> diff --git a/drivers/gpu/drm/rockchip/cdn-dp-link-training.c 
> b/drivers/gpu/drm/rockchip/cdn-dp-link-training.c
> new file mode 100644
> index 000..b8fd5bc
> --- /dev/null
> +++ b/drivers/gpu/drm/rockchip/cdn-dp-link-training.c

/snip

> +static int cdn_dp_get_lower_link_rate(struct cdn_dp_device *dp)
> +{
> + if (dp->link.rate == DP_LINK_BW_1_62)
> + return -EINVAL;
> + else if (dp->link.rate == DP_LINK_BW_2_7)
> + dp->link.rate = DP_LINK_BW_1_62;

Extra indent

> + else
> + dp->link.rate = DP_LINK_BW_2_7;


This is better expressed as a switch statement:


switch (dp->link.rate) {
case

[PATCH v3 4/4] drm/rockchip: support dp training outside dp firmware

2018-05-14 Thread Lin Huang

DP firmware uses fixed phy config values to do training, but some
boards need to adjust these values to fit for their unique hardware
design. So if the phy is using custom config values, do software
link training instead of relying on firmware, if software training
fail, keep firmware training as a fallback if sw training fails.

Signed-off-by: Chris Zhong 
Signed-off-by: Lin Huang 
---
Changes in v2:
- update patch following Enric suggest
Changes in v3:
- use variable fw_training instead sw_training_success
- base on DP SPCE, if training fail use lower link rate to retry training

 drivers/gpu/drm/rockchip/Makefile   |   3 +-
 drivers/gpu/drm/rockchip/cdn-dp-core.c  |  24 +-
 drivers/gpu/drm/rockchip/cdn-dp-core.h  |   2 +
 drivers/gpu/drm/rockchip/cdn-dp-link-training.c | 416 
 drivers/gpu/drm/rockchip/cdn-dp-reg.c   |  31 +-
 drivers/gpu/drm/rockchip/cdn-dp-reg.h   |  38 ++-
 6 files changed, 501 insertions(+), 13 deletions(-)
 create mode 100644 drivers/gpu/drm/rockchip/cdn-dp-link-training.c

diff --git a/drivers/gpu/drm/rockchip/Makefile 
b/drivers/gpu/drm/rockchip/Makefile
index a314e21..b932f62 100644
--- a/drivers/gpu/drm/rockchip/Makefile
+++ b/drivers/gpu/drm/rockchip/Makefile
@@ -9,7 +9,8 @@ rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o \
 rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o
 
 rockchipdrm-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o
-rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o
+rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o \
+   cdn-dp-link-training.o
 rockchipdrm-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
 rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o
 rockchipdrm-$(CONFIG_ROCKCHIP_INNO_HDMI) += inno_hdmi.o
diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c 
b/drivers/gpu/drm/rockchip/cdn-dp-core.c
index cce64c1..d9d0d4d 100644
--- a/drivers/gpu/drm/rockchip/cdn-dp-core.c
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
@@ -629,11 +629,13 @@ static void cdn_dp_encoder_enable(struct drm_encoder 
*encoder)
goto out;
}
}
-
-   ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
-   if (ret) {
-   DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
-   goto out;
+   if (dp->use_fw_training == true) {
+   ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
+   if (ret) {
+   DRM_DEV_ERROR(dp->dev,
+ "Failed to idle video %d\n", ret);
+   goto out;
+   }
}
 
ret = cdn_dp_config_video(dp);
@@ -642,11 +644,15 @@ static void cdn_dp_encoder_enable(struct drm_encoder 
*encoder)
goto out;
}
 
-   ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
-   if (ret) {
-   DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
-   goto out;
+   if (dp->use_fw_training == true) {
+   ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
+   if (ret) {
+   DRM_DEV_ERROR(dp->dev,
+   "Failed to valid video %d\n", ret);
+   goto out;
+   }
}
+
 out:
mutex_unlock(>lock);
 }
diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.h 
b/drivers/gpu/drm/rockchip/cdn-dp-core.h
index 46159b2..77a9793 100644
--- a/drivers/gpu/drm/rockchip/cdn-dp-core.h
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.h
@@ -84,6 +84,7 @@ struct cdn_dp_device {
bool connected;
bool active;
bool suspended;
+   bool use_fw_training;
 
const struct firmware *fw;  /* cdn dp firmware */
unsigned int fw_version;/* cdn fw version */
@@ -106,6 +107,7 @@ struct cdn_dp_device {
u8 ports;
u8 lanes;
int active_port;
+   u8 train_set[4];
 
u8 dpcd[DP_RECEIVER_CAP_SIZE];
bool sink_has_audio;
diff --git a/drivers/gpu/drm/rockchip/cdn-dp-link-training.c 
b/drivers/gpu/drm/rockchip/cdn-dp-link-training.c
new file mode 100644
index 000..b8fd5bc
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/cdn-dp-link-training.c
@@ -0,0 +1,416 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author: Chris Zhong 
+ */
+
+#include 
+#include 
+#include 
+#include 
+
+#include "cdn-dp-core.h"
+#include "cdn-dp-reg.h"
+
+static void cdn_dp_set_signal_levels(struct cdn_dp_device *dp)
+{
+   struct cdn_dp_port *port = dp->port[dp->active_port];
+   struct rockchip_typec_phy *tcphy = phy_get_drvdata(port->phy);
+
+   int rate = drm_dp_bw_code_to_link_rate(dp->link.rate);
+   u8 swing = (dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) >>
+

[PATCH v3 4/4] drm/rockchip: support dp training outside dp firmware

2018-05-14 Thread Lin Huang

DP firmware uses fixed phy config values to do training, but some
boards need to adjust these values to fit for their unique hardware
design. So if the phy is using custom config values, do software
link training instead of relying on firmware, if software training
fail, keep firmware training as a fallback if sw training fails.

Signed-off-by: Chris Zhong 
Signed-off-by: Lin Huang 
---
Changes in v2:
- update patch following Enric suggest
Changes in v3:
- use variable fw_training instead sw_training_success
- base on DP SPCE, if training fail use lower link rate to retry training

 drivers/gpu/drm/rockchip/Makefile   |   3 +-
 drivers/gpu/drm/rockchip/cdn-dp-core.c  |  24 +-
 drivers/gpu/drm/rockchip/cdn-dp-core.h  |   2 +
 drivers/gpu/drm/rockchip/cdn-dp-link-training.c | 416 
 drivers/gpu/drm/rockchip/cdn-dp-reg.c   |  31 +-
 drivers/gpu/drm/rockchip/cdn-dp-reg.h   |  38 ++-
 6 files changed, 501 insertions(+), 13 deletions(-)
 create mode 100644 drivers/gpu/drm/rockchip/cdn-dp-link-training.c

diff --git a/drivers/gpu/drm/rockchip/Makefile 
b/drivers/gpu/drm/rockchip/Makefile
index a314e21..b932f62 100644
--- a/drivers/gpu/drm/rockchip/Makefile
+++ b/drivers/gpu/drm/rockchip/Makefile
@@ -9,7 +9,8 @@ rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o \
 rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o
 
 rockchipdrm-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o
-rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o
+rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o \
+   cdn-dp-link-training.o
 rockchipdrm-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
 rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o
 rockchipdrm-$(CONFIG_ROCKCHIP_INNO_HDMI) += inno_hdmi.o
diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c 
b/drivers/gpu/drm/rockchip/cdn-dp-core.c
index cce64c1..d9d0d4d 100644
--- a/drivers/gpu/drm/rockchip/cdn-dp-core.c
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
@@ -629,11 +629,13 @@ static void cdn_dp_encoder_enable(struct drm_encoder 
*encoder)
goto out;
}
}
-
-   ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
-   if (ret) {
-   DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
-   goto out;
+   if (dp->use_fw_training == true) {
+   ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
+   if (ret) {
+   DRM_DEV_ERROR(dp->dev,
+ "Failed to idle video %d\n", ret);
+   goto out;
+   }
}
 
ret = cdn_dp_config_video(dp);
@@ -642,11 +644,15 @@ static void cdn_dp_encoder_enable(struct drm_encoder 
*encoder)
goto out;
}
 
-   ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
-   if (ret) {
-   DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
-   goto out;
+   if (dp->use_fw_training == true) {
+   ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
+   if (ret) {
+   DRM_DEV_ERROR(dp->dev,
+   "Failed to valid video %d\n", ret);
+   goto out;
+   }
}
+
 out:
mutex_unlock(>lock);
 }
diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.h 
b/drivers/gpu/drm/rockchip/cdn-dp-core.h
index 46159b2..77a9793 100644
--- a/drivers/gpu/drm/rockchip/cdn-dp-core.h
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.h
@@ -84,6 +84,7 @@ struct cdn_dp_device {
bool connected;
bool active;
bool suspended;
+   bool use_fw_training;
 
const struct firmware *fw;  /* cdn dp firmware */
unsigned int fw_version;/* cdn fw version */
@@ -106,6 +107,7 @@ struct cdn_dp_device {
u8 ports;
u8 lanes;
int active_port;
+   u8 train_set[4];
 
u8 dpcd[DP_RECEIVER_CAP_SIZE];
bool sink_has_audio;
diff --git a/drivers/gpu/drm/rockchip/cdn-dp-link-training.c 
b/drivers/gpu/drm/rockchip/cdn-dp-link-training.c
new file mode 100644
index 000..b8fd5bc
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/cdn-dp-link-training.c
@@ -0,0 +1,416 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author: Chris Zhong 
+ */
+
+#include 
+#include 
+#include 
+#include 
+
+#include "cdn-dp-core.h"
+#include "cdn-dp-reg.h"
+
+static void cdn_dp_set_signal_levels(struct cdn_dp_device *dp)
+{
+   struct cdn_dp_port *port = dp->port[dp->active_port];
+   struct rockchip_typec_phy *tcphy = phy_get_drvdata(port->phy);
+
+   int rate = drm_dp_bw_code_to_link_rate(dp->link.rate);
+   u8 swing = (dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) >>
+  DP_TRAIN_VOLTAGE_SWING_SHIFT;
+   u8

Re: [PATCH v3 4/4] drm/rockchip: support dp training outside dp firmware

Re: [PATCH v3 4/4] drm/rockchip: support dp training outside dp firmware

[PATCH v3 4/4] drm/rockchip: support dp training outside dp firmware

[PATCH v3 4/4] drm/rockchip: support dp training outside dp firmware

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