Re: [PATCHv3 3/3] drm: bridge: anx78xx: Add anx78xx driver support by analogix.

[Dan Carpenter]

On Thu, Sep 10, 2015 at 06:35:52PM +0200, Enric Balletbo i Serra wrote:
> diff --git a/drivers/gpu/drm/bridge/anx78xx/anx78xx.h 
> b/drivers/gpu/drm/bridge/anx78xx/anx78xx.h
> new file mode 100644
> index 000..4f6dd1d
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/anx78xx/anx78xx.h
> @@ -0,0 +1,44 @@
> +/*
> + * Copyright(c) 2015, Analogix Semiconductor. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + */
> +
> +#ifndef __ANX78xx_H
> +#define __ANX78xx_H
> +
> +#include 
> +#include 
> +#include 
> +#include 
> +#include 
> +
> +#define AUX_ERR  1
> +#define AUX_OK   0

Get rid of these.  They aren't used much and we could easily use normal
error codes instead.

> +
> +struct anx78xx_platform_data {
> + struct gpio_desc *gpiod_pd;
> + struct gpio_desc *gpiod_reset;
> + spinlock_t lock;
> +};
> +
> +struct anx78xx {
> + struct i2c_client *client;
> + struct anx78xx_platform_data *pdata;
> + struct delayed_work work;
> + struct workqueue_struct *workqueue;
> + struct mutex lock;
> +};
> +
> +void anx78xx_poweron(struct anx78xx *data);
> +void anx78xx_poweroff(struct anx78xx *data);
> +
> +#endif
> diff --git a/drivers/gpu/drm/bridge/anx78xx/anx78xx_main.c 
> b/drivers/gpu/drm/bridge/anx78xx/anx78xx_main.c
> new file mode 100644
> index 000..b92d2bc
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/anx78xx/anx78xx_main.c
> @@ -0,0 +1,241 @@
> +/*
> + * Copyright(c) 2015, Analogix Semiconductor. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + */
> +#include 
> +#include 
> +#include 
> +#include 
> +#include 
> +#include 
> +#include 
> +#include 
> +#include 
> +#include 
> +
> +#include "anx78xx.h"
> +#include "slimport_tx_drv.h"
> +
> +void anx78xx_poweron(struct anx78xx *anx78xx)
> +{
> + struct device *dev = >client->dev;
> + struct anx78xx_platform_data *pdata = anx78xx->pdata;
> +
> + gpiod_set_value_cansleep(pdata->gpiod_reset, 0);
> + usleep_range(1000, 2000);
> +
> + gpiod_set_value_cansleep(pdata->gpiod_pd, 0);
> + usleep_range(1000, 2000);
> +
> + gpiod_set_value_cansleep(pdata->gpiod_reset, 1);
> +
> + dev_dbg(dev, "power on\n");

Remove these debug printks.  Use ftrace instead.

> +}
> +
> +void anx78xx_poweroff(struct anx78xx *anx78xx)
> +{
> + struct device *dev = >client->dev;
> + struct anx78xx_platform_data *pdata = anx78xx->pdata;
> +
> + gpiod_set_value_cansleep(pdata->gpiod_reset, 0);
> + usleep_range(1000, 2000);
> +
> + gpiod_set_value_cansleep(pdata->gpiod_pd, 1);
> + usleep_range(1000, 2000);
> +
> + dev_dbg(dev, "power down\n");

Delete.

> +}
> +
> +static int anx78xx_init_gpio(struct anx78xx *anx78xx)
> +{
> + struct device *dev = >client->dev;
> + struct anx78xx_platform_data *pdata = anx78xx->pdata;
> + int ret;
> +
> + /* gpio for chip power down */
> + pdata->gpiod_pd = devm_gpiod_get(dev, "pd", GPIOD_OUT_HIGH);
> + if (IS_ERR(pdata->gpiod_pd)) {
> + dev_err(dev, "unable to claim pd gpio\n");
> + ret = PTR_ERR(pdata->gpiod_pd);
> + return ret;


The ret variable isn't necessary in this function.

> + }
> +
> + /* gpio for chip reset */
> + pdata->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
> + if (IS_ERR(pdata->gpiod_reset)) {
> + dev_err(dev, "unable to claim reset gpio\n");
> + ret = PTR_ERR(pdata->gpiod_reset);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int anx78xx_system_init(struct anx78xx *anx78xx)
> +{
> + struct device *dev = >client->dev;
> + int ret;
> +
> + ret = sp_chip_detect(anx78xx);

Make sp_chip_detect() use normal error codes.

> + if (ret == 0) {
> + anx78xx_poweroff(anx78xx);
> + dev_err(dev, "failed to detect anx78xx\n");
> + return -ENODEV;
> + }
> +
> + sp_tx_variable_init();
> + return 0;
> +}
> +
> +static void anx78xx_work_func(struct work_struct *work)
> +{
> + struct anx78xx *anx78xx = container_of(work, struct anx78xx,
> 

Re: [PATCHv3 3/3] drm: bridge: anx78xx: Add anx78xx driver support by analogix.

[Nicolas Boichat]

Hi Enric,

Partial review for now, thanks for you work.

Best,

On Thu, Sep 10, 2015 at 06:35:52PM +0200, Enric Balletbo i Serra wrote:
> At the moment it only supports ANX7814.
> 
> The ANX7814 is an ultra-low power Full-HD (1080p60) SlimPort transmitter
> designed for portable devices.
> 
> This driver adds initial support and supports HDMI to DP pass-through mode.
> 
> Signed-off-by: Enric Balletbo i Serra 
> ---

Please include a revision log here, stating what you changed between each
version.

>  drivers/gpu/drm/bridge/Kconfig   |2 +
>  drivers/gpu/drm/bridge/Makefile  |1 +
>  drivers/gpu/drm/bridge/anx78xx/Kconfig   |7 +
>  drivers/gpu/drm/bridge/anx78xx/Makefile  |4 +
>  drivers/gpu/drm/bridge/anx78xx/anx78xx.h |   44 +
>  drivers/gpu/drm/bridge/anx78xx/anx78xx_main.c|  241 ++
>  drivers/gpu/drm/bridge/anx78xx/slimport_tx_drv.c | 3198 
> ++
>  drivers/gpu/drm/bridge/anx78xx/slimport_tx_drv.h |  215 ++
>  drivers/gpu/drm/bridge/anx78xx/slimport_tx_reg.h |  786 ++
>  9 files changed, 4498 insertions(+)
>  create mode 100644 drivers/gpu/drm/bridge/anx78xx/Kconfig
>  create mode 100644 drivers/gpu/drm/bridge/anx78xx/Makefile
>  create mode 100644 drivers/gpu/drm/bridge/anx78xx/anx78xx.h
>  create mode 100644 drivers/gpu/drm/bridge/anx78xx/anx78xx_main.c
>  create mode 100644 drivers/gpu/drm/bridge/anx78xx/slimport_tx_drv.c
>  create mode 100644 drivers/gpu/drm/bridge/anx78xx/slimport_tx_drv.h
>  create mode 100644 drivers/gpu/drm/bridge/anx78xx/slimport_tx_reg.h
> 
> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> index 2de52a5..aa6fe12 100644
> --- a/drivers/gpu/drm/bridge/Kconfig
> +++ b/drivers/gpu/drm/bridge/Kconfig
> @@ -29,4 +29,6 @@ config DRM_PARADE_PS8622
>   ---help---
> Parade eDP-LVDS bridge chip driver.
>  
> +source "drivers/gpu/drm/bridge/anx78xx/Kconfig"
> +
>  endmenu
> diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
> index e2eef1c..e5bd38b 100644
> --- a/drivers/gpu/drm/bridge/Makefile
> +++ b/drivers/gpu/drm/bridge/Makefile
> @@ -3,3 +3,4 @@ ccflags-y := -Iinclude/drm
>  obj-$(CONFIG_DRM_DW_HDMI) += dw_hdmi.o
>  obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
>  obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
> +obj-$(CONFIG_DRM_ANX78XX) += anx78xx/
> diff --git a/drivers/gpu/drm/bridge/anx78xx/Kconfig 
> b/drivers/gpu/drm/bridge/anx78xx/Kconfig
> new file mode 100644
> index 000..08f9c08
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/anx78xx/Kconfig
> @@ -0,0 +1,7 @@
> +config DRM_ANX78XX
> + tristate "Analogix ANX78XX bridge"
> + help
> + ANX78XX is a HD video transmitter chip over micro-USB
> + connector for smartphone device.
> +
> +
> diff --git a/drivers/gpu/drm/bridge/anx78xx/Makefile 
> b/drivers/gpu/drm/bridge/anx78xx/Makefile
> new file mode 100644
> index 000..a843733
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/anx78xx/Makefile
> @@ -0,0 +1,4 @@
> +obj-${CONFIG_DRM_ANX78XX} :=  anx78xx.o
> +
> +anx78xx-y += anx78xx_main.o
> +anx78xx-y += slimport_tx_drv.o
> diff --git a/drivers/gpu/drm/bridge/anx78xx/anx78xx.h 
> b/drivers/gpu/drm/bridge/anx78xx/anx78xx.h
> new file mode 100644
> index 000..4f6dd1d
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/anx78xx/anx78xx.h
> @@ -0,0 +1,44 @@
> +/*
> + * Copyright(c) 2015, Analogix Semiconductor. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + */
> +
> +#ifndef __ANX78xx_H
> +#define __ANX78xx_H
> +
> +#include 
> +#include 
> +#include 
> +#include 
> +#include 
> +
> +#define AUX_ERR  1
> +#define AUX_OK   0
> +
> +struct anx78xx_platform_data {
> + struct gpio_desc *gpiod_pd;
> + struct gpio_desc *gpiod_reset;
> + spinlock_t lock;
> +};
> +
> +struct anx78xx {
> + struct i2c_client *client;
> + struct anx78xx_platform_data *pdata;
> + struct delayed_work work;
> + struct workqueue_struct *workqueue;
> + struct mutex lock;
> +};
> +
> +void anx78xx_poweron(struct anx78xx *data);
> +void anx78xx_poweroff(struct anx78xx *data);
> +
> +#endif
> diff --git a/drivers/gpu/drm/bridge/anx78xx/anx78xx_main.c 
> b/drivers/gpu/drm/bridge/anx78xx/anx78xx_main.c
> new file mode 100644
> index 000..b92d2bc
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/anx78xx/anx78xx_main.c
> @@ -0,0 +1,241 @@
> +/*
> + * Copyright(c) 2015, Analogix Semiconductor. All rights reserved.
> + *
> + * This program is free 

[PATCHv3 3/3] drm: bridge: anx78xx: Add anx78xx driver support by analogix.

[Enric Balletbo i Serra]

At the moment it only supports ANX7814.

The ANX7814 is an ultra-low power Full-HD (1080p60) SlimPort transmitter
designed for portable devices.

This driver adds initial support and supports HDMI to DP pass-through mode.

Signed-off-by: Enric Balletbo i Serra 
---
 drivers/gpu/drm/bridge/Kconfig   |2 +
 drivers/gpu/drm/bridge/Makefile  |1 +
 drivers/gpu/drm/bridge/anx78xx/Kconfig   |7 +
 drivers/gpu/drm/bridge/anx78xx/Makefile  |4 +
 drivers/gpu/drm/bridge/anx78xx/anx78xx.h |   44 +
 drivers/gpu/drm/bridge/anx78xx/anx78xx_main.c|  241 ++
 drivers/gpu/drm/bridge/anx78xx/slimport_tx_drv.c | 3198 ++
 drivers/gpu/drm/bridge/anx78xx/slimport_tx_drv.h |  215 ++
 drivers/gpu/drm/bridge/anx78xx/slimport_tx_reg.h |  786 ++
 9 files changed, 4498 insertions(+)
 create mode 100644 drivers/gpu/drm/bridge/anx78xx/Kconfig
 create mode 100644 drivers/gpu/drm/bridge/anx78xx/Makefile
 create mode 100644 drivers/gpu/drm/bridge/anx78xx/anx78xx.h
 create mode 100644 drivers/gpu/drm/bridge/anx78xx/anx78xx_main.c
 create mode 100644 drivers/gpu/drm/bridge/anx78xx/slimport_tx_drv.c
 create mode 100644 drivers/gpu/drm/bridge/anx78xx/slimport_tx_drv.h
 create mode 100644 drivers/gpu/drm/bridge/anx78xx/slimport_tx_reg.h

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 2de52a5..aa6fe12 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -29,4 +29,6 @@ config DRM_PARADE_PS8622
---help---
  Parade eDP-LVDS bridge chip driver.
 
+source "drivers/gpu/drm/bridge/anx78xx/Kconfig"
+
 endmenu
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index e2eef1c..e5bd38b 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -3,3 +3,4 @@ ccflags-y := -Iinclude/drm
 obj-$(CONFIG_DRM_DW_HDMI) += dw_hdmi.o
 obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
 obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
+obj-$(CONFIG_DRM_ANX78XX) += anx78xx/
diff --git a/drivers/gpu/drm/bridge/anx78xx/Kconfig 
b/drivers/gpu/drm/bridge/anx78xx/Kconfig
new file mode 100644
index 000..08f9c08
--- /dev/null
+++ b/drivers/gpu/drm/bridge/anx78xx/Kconfig
@@ -0,0 +1,7 @@
+config DRM_ANX78XX
+   tristate "Analogix ANX78XX bridge"
+   help
+   ANX78XX is a HD video transmitter chip over micro-USB
+   connector for smartphone device.
+
+
diff --git a/drivers/gpu/drm/bridge/anx78xx/Makefile 
b/drivers/gpu/drm/bridge/anx78xx/Makefile
new file mode 100644
index 000..a843733
--- /dev/null
+++ b/drivers/gpu/drm/bridge/anx78xx/Makefile
@@ -0,0 +1,4 @@
+obj-${CONFIG_DRM_ANX78XX} :=  anx78xx.o
+
+anx78xx-y += anx78xx_main.o
+anx78xx-y += slimport_tx_drv.o
diff --git a/drivers/gpu/drm/bridge/anx78xx/anx78xx.h 
b/drivers/gpu/drm/bridge/anx78xx/anx78xx.h
new file mode 100644
index 000..4f6dd1d
--- /dev/null
+++ b/drivers/gpu/drm/bridge/anx78xx/anx78xx.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright(c) 2015, Analogix Semiconductor. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __ANX78xx_H
+#define __ANX78xx_H
+
+#include 
+#include 
+#include 
+#include 
+#include 
+
+#define AUX_ERR  1
+#define AUX_OK   0
+
+struct anx78xx_platform_data {
+   struct gpio_desc *gpiod_pd;
+   struct gpio_desc *gpiod_reset;
+   spinlock_t lock;
+};
+
+struct anx78xx {
+   struct i2c_client *client;
+   struct anx78xx_platform_data *pdata;
+   struct delayed_work work;
+   struct workqueue_struct *workqueue;
+   struct mutex lock;
+};
+
+void anx78xx_poweron(struct anx78xx *data);
+void anx78xx_poweroff(struct anx78xx *data);
+
+#endif
diff --git a/drivers/gpu/drm/bridge/anx78xx/anx78xx_main.c 
b/drivers/gpu/drm/bridge/anx78xx/anx78xx_main.c
new file mode 100644
index 000..b92d2bc
--- /dev/null
+++ b/drivers/gpu/drm/bridge/anx78xx/anx78xx_main.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright(c) 2015, Analogix Semiconductor. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+#include