[PATCH 1/2] fb: backlight: HX8357: Make IM pins optionnal

[PATCH 1/2] fb: backlight: HX8357: Make IM pins optionnal

[Alexandre Belloni]

From: Maxime Ripard <maxime.ripard@free-electrons.com>

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
 drivers/video/backlight/hx8357.c | 53 +++++++++++++++++++++++-----------------
 1 file changed, 31 insertions(+), 22 deletions(-)

diff --git a/drivers/video/backlight/hx8357.c b/drivers/video/backlight/hx8357.c
index a0482b5..69f5672 100644
--- a/drivers/video/backlight/hx8357.c
+++ b/drivers/video/backlight/hx8357.c
@@ -76,6 +76,7 @@ struct hx8357_data {
 	unsigned		reset;
 	struct spi_device	*spi;
 	int			state;
+	u8			use_im_pins;
 };
 
 static u8 hx8357_seq_power[] = {
@@ -250,9 +251,11 @@ static int hx8357_lcd_init(struct lcd_device *lcdev)
 	 * Set the interface selection pins to SPI mode, with three
 	 * wires
 	 */
-	gpio_set_value_cansleep(lcd->im_pins[0], 1);
-	gpio_set_value_cansleep(lcd->im_pins[1], 0);
-	gpio_set_value_cansleep(lcd->im_pins[2], 1);
+	if (lcd->use_im_pins) {
+		gpio_set_value_cansleep(lcd->im_pins[0], 1);
+		gpio_set_value_cansleep(lcd->im_pins[1], 0);
+		gpio_set_value_cansleep(lcd->im_pins[2], 1);
+	}
 
 	/* Reset the screen */
 	gpio_set_value(lcd->reset, 1);
@@ -424,26 +427,32 @@ static int hx8357_probe(struct spi_device *spi)
 		return -EINVAL;
 	}
 
-	for (i = 0; i < HX8357_NUM_IM_PINS; i++) {
-		lcd->im_pins[i] = of_get_named_gpio(spi->dev.of_node,
-						"im-gpios", i);
-		if (lcd->im_pins[i] = -EPROBE_DEFER) {
-			dev_info(&spi->dev, "GPIO requested is not here yet, deferring the probe\n");
-			return -EPROBE_DEFER;
-		}
-		if (!gpio_is_valid(lcd->im_pins[i])) {
-			dev_err(&spi->dev, "Missing dt property: im-gpios\n");
-			return -EINVAL;
+	if (of_find_property(spi->dev.of_node, "im-gpios", NULL)) {
+		lcd->use_im_pins = 1;
+
+		for (i = 0; i < HX8357_NUM_IM_PINS; i++) {
+			lcd->im_pins[i] = of_get_named_gpio(spi->dev.of_node,
+							    "im-gpios", i);
+			if (lcd->im_pins[i] = -EPROBE_DEFER) {
+				dev_info(&spi->dev, "GPIO requested is not here yet, deferring the probe\n");
+				return -EPROBE_DEFER;
+			}
+			if (!gpio_is_valid(lcd->im_pins[i])) {
+				dev_err(&spi->dev, "Missing dt property: im-gpios\n");
+				return -EINVAL;
+			}
+
+			ret = devm_gpio_request_one(&spi->dev, lcd->im_pins[i],
+						    GPIOF_OUT_INIT_LOW,
+						    "im_pins");
+			if (ret) {
+				dev_err(&spi->dev, "failed to request gpio %d: %d\n",
+					lcd->im_pins[i], ret);
+				return -EINVAL;
+			}
 		}
-
-		ret = devm_gpio_request_one(&spi->dev, lcd->im_pins[i],
-					GPIOF_OUT_INIT_LOW, "im_pins");
-		if (ret) {
-			dev_err(&spi->dev, "failed to request gpio %d: %d\n",
-				lcd->im_pins[i], ret);
-			return -EINVAL;
-		}
-	}
+	} else
+		lcd->use_im_pins = 0;
 
 	lcdev = lcd_device_register("mxsfb", &spi->dev, lcd, &hx8357_ops);
 	if (IS_ERR(lcdev)) {
-- 
1.8.1.2

[PATCH 2/2] fb: backlight: HX8357: Add HX8369 support

[Alexandre Belloni]

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
 drivers/video/backlight/hx8357.c | 183 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 175 insertions(+), 8 deletions(-)

diff --git a/drivers/video/backlight/hx8357.c b/drivers/video/backlight/hx8357.c
index 69f5672..b1c4042 100644
--- a/drivers/video/backlight/hx8357.c
+++ b/drivers/video/backlight/hx8357.c
@@ -71,6 +71,18 @@
 #define HX8357_SET_POWER_NORMAL		0xd2
 #define HX8357_SET_PANEL_RELATED	0xe9
 
+#define HX8369_SET_DISPLAY_BRIGHTNESS		0x51
+#define HX8369_WRITE_CABC_DISPLAY_VALUE		0x53
+#define HX8369_WRITE_CABC_BRIGHT_CTRL		0x55
+#define HX8369_WRITE_CABC_MIN_BRIGHTNESS	0x5e
+#define HX8369_SET_POWER			0xb1
+#define HX8369_SET_DISPLAY_MODE			0xb2
+#define HX8369_SET_DISPLAY_WAVEFORM_CYC		0xb4
+#define HX8369_SET_VCOM				0xb6
+#define HX8369_SET_EXTENSION_COMMAND		0xb9
+#define HX8369_SET_GIP				0xd5
+#define HX8369_SET_GAMMA_CURVE_RELATED		0xe0
+
 struct hx8357_data {
 	unsigned		im_pins[HX8357_NUM_IM_PINS];
 	unsigned		reset;
@@ -144,6 +156,61 @@ static u8 hx8357_seq_display_mode[] = {
 	HX8357_SET_DISPLAY_MODE_RGB_INTERFACE,
 };
 
+static u8 hx8369_seq_write_CABC_min_brightness[] = {
+	HX8369_WRITE_CABC_MIN_BRIGHTNESS, 0x00,
+};
+
+static u8 hx8369_seq_write_CABC_control[] = {
+	HX8369_WRITE_CABC_DISPLAY_VALUE, 0x24,
+};
+
+static u8 hx8369_seq_set_display_brightness[] = {
+	HX8369_SET_DISPLAY_BRIGHTNESS, 0xFF,
+};
+
+static u8 hx8369_seq_write_CABC_control_setting[] = {
+	HX8369_WRITE_CABC_BRIGHT_CTRL, 0x02,
+};
+
+static u8 hx8369_seq_extension_command[] = {
+	HX8369_SET_EXTENSION_COMMAND, 0xff, 0x83, 0x69,
+};
+
+static u8 hx8369_seq_display_related[] = {
+	HX8369_SET_DISPLAY_MODE, 0x00, 0x2b, 0x03, 0x03, 0x70, 0x00,
+	0xff, 0x00, 0x00, 0x00, 0x00, 0x03, 0x03, 0x00,	0x01,
+};
+
+static u8 hx8369_seq_panel_waveform_cycle[] = {
+	HX8369_SET_DISPLAY_WAVEFORM_CYC, 0x0a, 0x1d, 0x80, 0x06, 0x02,
+};
+
+static u8 hx8369_seq_set_address_mode[] = {
+	HX8357_SET_ADDRESS_MODE, 0x00,
+};
+
+static u8 hx8369_seq_vcom[] = {
+	HX8369_SET_VCOM, 0x3e, 0x3e,
+};
+
+static u8 hx8369_seq_gip[] = {
+	HX8369_SET_GIP, 0x00, 0x01, 0x03, 0x25, 0x01, 0x02, 0x28, 0x70,
+	0x11, 0x13, 0x00, 0x00, 0x40, 0x26, 0x51, 0x37, 0x00, 0x00, 0x71,
+	0x35, 0x60, 0x24, 0x07, 0x0f, 0x04, 0x04,
+};
+
+static u8 hx8369_seq_power[] = {
+	HX8369_SET_POWER, 0x01, 0x00, 0x34, 0x03, 0x00, 0x11, 0x11, 0x32,
+	0x2f, 0x3f, 0x3f, 0x01, 0x3a, 0x01, 0xe6, 0xe6, 0xe6, 0xe6, 0xe6,
+};
+
+static u8 hx8369_seq_gamma_curve_related[] = {
+	HX8369_SET_GAMMA_CURVE_RELATED, 0x00, 0x0d, 0x19, 0x2f, 0x3b, 0x3d,
+	0x2e, 0x4a, 0x08, 0x0e, 0x0f, 0x14, 0x16, 0x14, 0x14, 0x14, 0x1e,
+	0x00, 0x0d, 0x19, 0x2f, 0x3b, 0x3d, 0x2e, 0x4a, 0x08, 0x0e, 0x0f,
+	0x14, 0x16, 0x14, 0x14, 0x14, 0x1e,
+};
+
 static int hx8357_spi_write_then_read(struct lcd_device *lcdev,
 				u8 *txbuf, u16 txlen,
 				u8 *rxbuf, u16 rxlen)
@@ -242,6 +309,16 @@ static int hx8357_exit_standby(struct lcd_device *lcdev)
 	return 0;
 }
 
+static void hx8357_lcd_reset(struct hx8357_data *lcd)
+{
+	gpio_set_value(lcd->reset, 1);
+	usleep_range(10000, 12000);
+	gpio_set_value(lcd->reset, 0);
+	usleep_range(10000, 12000);
+	gpio_set_value(lcd->reset, 1);
+	msleep(120);
+}
+
 static int hx8357_lcd_init(struct lcd_device *lcdev)
 {
 	struct hx8357_data *lcd = lcd_get_data(lcdev);
@@ -257,13 +334,7 @@ static int hx8357_lcd_init(struct lcd_device *lcdev)
 		gpio_set_value_cansleep(lcd->im_pins[2], 1);
 	}
 
-	/* Reset the screen */
-	gpio_set_value(lcd->reset, 1);
-	usleep_range(10000, 12000);
-	gpio_set_value(lcd->reset, 0);
-	usleep_range(10000, 12000);
-	gpio_set_value(lcd->reset, 1);
-	msleep(120);
+	hx8357_lcd_reset(lcd);
 
 	ret = hx8357_spi_write_array(lcdev, hx8357_seq_power,
 				ARRAY_SIZE(hx8357_seq_power));
@@ -359,6 +430,97 @@ static int hx8357_lcd_init(struct lcd_device *lcdev)
 	return 0;
 }
 
+static int hx8369_lcd_init(struct lcd_device *lcdev)
+{
+	struct hx8357_data *lcd = lcd_get_data(lcdev);
+	int ret;
+
+	hx8357_lcd_reset(lcd);
+
+	ret = hx8357_spi_write_array(lcdev, hx8369_seq_extension_command,
+				ARRAY_SIZE(hx8369_seq_extension_command));
+	if (ret < 0)
+		return ret;
+	usleep_range(10000, 12000);
+
+	ret = hx8357_spi_write_array(lcdev, hx8369_seq_display_related,
+				ARRAY_SIZE(hx8369_seq_display_related));
+	if (ret < 0)
+		return ret;
+
+	ret = hx8357_spi_write_array(lcdev, hx8369_seq_panel_waveform_cycle,
+				ARRAY_SIZE(hx8369_seq_panel_waveform_cycle));
+	if (ret < 0)
+		return ret;
+
+	ret = hx8357_spi_write_array(lcdev, hx8369_seq_set_address_mode,
+				ARRAY_SIZE(hx8369_seq_set_address_mode));
+	if (ret < 0)
+		return ret;
+
+	ret = hx8357_spi_write_array(lcdev, hx8369_seq_vcom,
+				ARRAY_SIZE(hx8369_seq_vcom));
+	if (ret < 0)
+		return ret;
+
+	ret = hx8357_spi_write_array(lcdev, hx8369_seq_gip,
+				ARRAY_SIZE(hx8369_seq_gip));
+	if (ret < 0)
+		return ret;
+
+	ret = hx8357_spi_write_array(lcdev, hx8369_seq_power,
+				ARRAY_SIZE(hx8369_seq_power));
+	if (ret < 0)
+		return ret;
+
+	ret = hx8357_spi_write_byte(lcdev, HX8357_EXIT_SLEEP_MODE);
+	if (ret < 0)
+		return ret;
+
+	msleep(120);
+
+	ret = hx8357_spi_write_array(lcdev, hx8369_seq_gamma_curve_related,
+				ARRAY_SIZE(hx8369_seq_gamma_curve_related));
+	if (ret < 0)
+		return ret;
+
+	ret = hx8357_spi_write_byte(lcdev, HX8357_EXIT_SLEEP_MODE);
+	if (ret < 0)
+		return ret;
+	usleep_range(1000, 1200);
+
+	ret = hx8357_spi_write_array(lcdev, hx8369_seq_write_CABC_control,
+				ARRAY_SIZE(hx8369_seq_write_CABC_control));
+	if (ret < 0)
+		return ret;
+	usleep_range(10000, 12000);
+
+	ret = hx8357_spi_write_array(lcdev,
+			hx8369_seq_write_CABC_control_setting,
+			ARRAY_SIZE(hx8369_seq_write_CABC_control_setting));
+	if (ret < 0)
+		return ret;
+
+	ret = hx8357_spi_write_array(lcdev,
+			hx8369_seq_write_CABC_min_brightness,
+			ARRAY_SIZE(hx8369_seq_write_CABC_min_brightness));
+	if (ret < 0)
+		return ret;
+	usleep_range(10000, 12000);
+
+	ret = hx8357_spi_write_array(lcdev, hx8369_seq_set_display_brightness,
+				ARRAY_SIZE(hx8369_seq_set_display_brightness));
+	if (ret < 0)
+		return ret;
+
+	ret = hx8357_spi_write_byte(lcdev, HX8357_SET_DISPLAY_ON);
+	if (ret < 0)
+		return ret;
+	msleep(100);
+
+	return 0;
+}
+
 #define POWER_IS_ON(pwr)	((pwr) <= FB_BLANK_NORMAL)
 
 static int hx8357_set_power(struct lcd_device *lcdev, int power)
@@ -461,7 +623,11 @@ static int hx8357_probe(struct spi_device *spi)
 	}
 	spi_set_drvdata(spi, lcdev);
 
-	ret = hx8357_lcd_init(lcdev);
+	ret = -ENODEV;
+	if (of_device_is_compatible(spi->dev.of_node, "himax,hx8357"))
+		ret = hx8357_lcd_init(lcdev);
+	else if (of_device_is_compatible(spi->dev.of_node, "himax,hx8369"))
+		ret = hx8369_lcd_init(lcdev);
 	if (ret) {
 		dev_err(&spi->dev, "Couldn't initialize panel\n");
 		goto init_error;
@@ -486,6 +652,7 @@ static int hx8357_remove(struct spi_device *spi)
 
 static const struct of_device_id hx8357_dt_ids[] = {
 	{ .compatible = "himax,hx8357" },
+	{ .compatible = "himax,hx8369" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, hx8357_dt_ids);
-- 
1.8.1.2

Re: [PATCH 2/2] fb: backlight: HX8357: Add HX8369 support

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 8236 bytes --]

Hi Alex,

On Fri, Jun 21, 2013 at 08:27:39PM +0200, Alexandre Belloni wrote:
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> ---
>  drivers/video/backlight/hx8357.c | 183 +++++++++++++++++++++++++++++++++++++--
>  1 file changed, 175 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/video/backlight/hx8357.c b/drivers/video/backlight/hx8357.c
> index 69f5672..b1c4042 100644
> --- a/drivers/video/backlight/hx8357.c
> +++ b/drivers/video/backlight/hx8357.c
> @@ -71,6 +71,18 @@
>  #define HX8357_SET_POWER_NORMAL		0xd2
>  #define HX8357_SET_PANEL_RELATED	0xe9
>  
> +#define HX8369_SET_DISPLAY_BRIGHTNESS		0x51
> +#define HX8369_WRITE_CABC_DISPLAY_VALUE		0x53
> +#define HX8369_WRITE_CABC_BRIGHT_CTRL		0x55
> +#define HX8369_WRITE_CABC_MIN_BRIGHTNESS	0x5e
> +#define HX8369_SET_POWER			0xb1
> +#define HX8369_SET_DISPLAY_MODE			0xb2
> +#define HX8369_SET_DISPLAY_WAVEFORM_CYC		0xb4
> +#define HX8369_SET_VCOM				0xb6
> +#define HX8369_SET_EXTENSION_COMMAND		0xb9
> +#define HX8369_SET_GIP				0xd5
> +#define HX8369_SET_GAMMA_CURVE_RELATED		0xe0
> +
>  struct hx8357_data {
>  	unsigned		im_pins[HX8357_NUM_IM_PINS];
>  	unsigned		reset;
> @@ -144,6 +156,61 @@ static u8 hx8357_seq_display_mode[] = {
>  	HX8357_SET_DISPLAY_MODE_RGB_INTERFACE,
>  };
>  
> +static u8 hx8369_seq_write_CABC_min_brightness[] = {
> +	HX8369_WRITE_CABC_MIN_BRIGHTNESS, 0x00,
> +};
> +
> +static u8 hx8369_seq_write_CABC_control[] = {
> +	HX8369_WRITE_CABC_DISPLAY_VALUE, 0x24,
> +};
> +
> +static u8 hx8369_seq_set_display_brightness[] = {
> +	HX8369_SET_DISPLAY_BRIGHTNESS, 0xFF,
> +};
> +
> +static u8 hx8369_seq_write_CABC_control_setting[] = {
> +	HX8369_WRITE_CABC_BRIGHT_CTRL, 0x02,
> +};
> +
> +static u8 hx8369_seq_extension_command[] = {
> +	HX8369_SET_EXTENSION_COMMAND, 0xff, 0x83, 0x69,
> +};
> +
> +static u8 hx8369_seq_display_related[] = {
> +	HX8369_SET_DISPLAY_MODE, 0x00, 0x2b, 0x03, 0x03, 0x70, 0x00,
> +	0xff, 0x00, 0x00, 0x00, 0x00, 0x03, 0x03, 0x00,	0x01,
> +};
> +
> +static u8 hx8369_seq_panel_waveform_cycle[] = {
> +	HX8369_SET_DISPLAY_WAVEFORM_CYC, 0x0a, 0x1d, 0x80, 0x06, 0x02,
> +};
> +
> +static u8 hx8369_seq_set_address_mode[] = {
> +	HX8357_SET_ADDRESS_MODE, 0x00,
> +};
> +
> +static u8 hx8369_seq_vcom[] = {
> +	HX8369_SET_VCOM, 0x3e, 0x3e,
> +};
> +
> +static u8 hx8369_seq_gip[] = {
> +	HX8369_SET_GIP, 0x00, 0x01, 0x03, 0x25, 0x01, 0x02, 0x28, 0x70,
> +	0x11, 0x13, 0x00, 0x00, 0x40, 0x26, 0x51, 0x37, 0x00, 0x00, 0x71,
> +	0x35, 0x60, 0x24, 0x07, 0x0f, 0x04, 0x04,
> +};
> +
> +static u8 hx8369_seq_power[] = {
> +	HX8369_SET_POWER, 0x01, 0x00, 0x34, 0x03, 0x00, 0x11, 0x11, 0x32,
> +	0x2f, 0x3f, 0x3f, 0x01, 0x3a, 0x01, 0xe6, 0xe6, 0xe6, 0xe6, 0xe6,
> +};
> +
> +static u8 hx8369_seq_gamma_curve_related[] = {
> +	HX8369_SET_GAMMA_CURVE_RELATED, 0x00, 0x0d, 0x19, 0x2f, 0x3b, 0x3d,
> +	0x2e, 0x4a, 0x08, 0x0e, 0x0f, 0x14, 0x16, 0x14, 0x14, 0x14, 0x1e,
> +	0x00, 0x0d, 0x19, 0x2f, 0x3b, 0x3d, 0x2e, 0x4a, 0x08, 0x0e, 0x0f,
> +	0x14, 0x16, 0x14, 0x14, 0x14, 0x1e,
> +};
> +
>  static int hx8357_spi_write_then_read(struct lcd_device *lcdev,
>  				u8 *txbuf, u16 txlen,
>  				u8 *rxbuf, u16 rxlen)
> @@ -242,6 +309,16 @@ static int hx8357_exit_standby(struct lcd_device *lcdev)
>  	return 0;
>  }
>  
> +static void hx8357_lcd_reset(struct hx8357_data *lcd)
> +{
> +	gpio_set_value(lcd->reset, 1);
> +	usleep_range(10000, 12000);
> +	gpio_set_value(lcd->reset, 0);
> +	usleep_range(10000, 12000);
> +	gpio_set_value(lcd->reset, 1);
> +	msleep(120);
> +}

We should probably use the new reset framework here, especially
reset-gpio (I'm not sure what's the current status of the patch though).

> +
>  static int hx8357_lcd_init(struct lcd_device *lcdev)
>  {
>  	struct hx8357_data *lcd = lcd_get_data(lcdev);
> @@ -257,13 +334,7 @@ static int hx8357_lcd_init(struct lcd_device *lcdev)
>  		gpio_set_value_cansleep(lcd->im_pins[2], 1);
>  	}
>  
> -	/* Reset the screen */
> -	gpio_set_value(lcd->reset, 1);
> -	usleep_range(10000, 12000);
> -	gpio_set_value(lcd->reset, 0);
> -	usleep_range(10000, 12000);
> -	gpio_set_value(lcd->reset, 1);
> -	msleep(120);
> +	hx8357_lcd_reset(lcd);

And that would become reset_device_reset

>  	ret = hx8357_spi_write_array(lcdev, hx8357_seq_power,
>  				ARRAY_SIZE(hx8357_seq_power));
> @@ -359,6 +430,97 @@ static int hx8357_lcd_init(struct lcd_device *lcdev)
>  	return 0;
>  }
>  
> +static int hx8369_lcd_init(struct lcd_device *lcdev)
> +{
> +	struct hx8357_data *lcd = lcd_get_data(lcdev);
> +	int ret;
> +
> +	hx8357_lcd_reset(lcd);
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_extension_command,
> +				ARRAY_SIZE(hx8369_seq_extension_command));
> +	if (ret < 0)
> +		return ret;
> +	usleep_range(10000, 12000);
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_display_related,
> +				ARRAY_SIZE(hx8369_seq_display_related));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_panel_waveform_cycle,
> +				ARRAY_SIZE(hx8369_seq_panel_waveform_cycle));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_set_address_mode,
> +				ARRAY_SIZE(hx8369_seq_set_address_mode));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_vcom,
> +				ARRAY_SIZE(hx8369_seq_vcom));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_gip,
> +				ARRAY_SIZE(hx8369_seq_gip));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_power,
> +				ARRAY_SIZE(hx8369_seq_power));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_byte(lcdev, HX8357_EXIT_SLEEP_MODE);
> +	if (ret < 0)
> +		return ret;
> +
> +	msleep(120);
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_gamma_curve_related,
> +				ARRAY_SIZE(hx8369_seq_gamma_curve_related));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_byte(lcdev, HX8357_EXIT_SLEEP_MODE);
> +	if (ret < 0)
> +		return ret;
> +	usleep_range(1000, 1200);
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_write_CABC_control,
> +				ARRAY_SIZE(hx8369_seq_write_CABC_control));
> +	if (ret < 0)
> +		return ret;
> +	usleep_range(10000, 12000);
> +
> +	ret = hx8357_spi_write_array(lcdev,
> +			hx8369_seq_write_CABC_control_setting,
> +			ARRAY_SIZE(hx8369_seq_write_CABC_control_setting));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_array(lcdev,
> +			hx8369_seq_write_CABC_min_brightness,
> +			ARRAY_SIZE(hx8369_seq_write_CABC_min_brightness));
> +	if (ret < 0)
> +		return ret;
> +	usleep_range(10000, 12000);
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_set_display_brightness,
> +				ARRAY_SIZE(hx8369_seq_set_display_brightness));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_byte(lcdev, HX8357_SET_DISPLAY_ON);
> +	if (ret < 0)
> +		return ret;
> +	msleep(100);
> +
> +	return 0;
> +}
> +
>  #define POWER_IS_ON(pwr)	((pwr) <= FB_BLANK_NORMAL)
>  
>  static int hx8357_set_power(struct lcd_device *lcdev, int power)
> @@ -461,7 +623,11 @@ static int hx8357_probe(struct spi_device *spi)
>  	}
>  	spi_set_drvdata(spi, lcdev);
>  
> -	ret = hx8357_lcd_init(lcdev);
> +	ret = -ENODEV;
> +	if (of_device_is_compatible(spi->dev.of_node, "himax,hx8357"))
> +		ret = hx8357_lcd_init(lcdev);
> +	else if (of_device_is_compatible(spi->dev.of_node, "himax,hx8369"))
> +		ret = hx8369_lcd_init(lcdev);
>  	if (ret) {
>  		dev_err(&spi->dev, "Couldn't initialize panel\n");
>  		goto init_error;
> @@ -486,6 +652,7 @@ static int hx8357_remove(struct spi_device *spi)
>  
>  static const struct of_device_id hx8357_dt_ids[] = {
>  	{ .compatible = "himax,hx8357" },
> +	{ .compatible = "himax,hx8369" },

Maybe you could use the .data field and of_match_device here.

>  	{},
>  };
>  MODULE_DEVICE_TABLE(of, hx8357_dt_ids);
> -- 
> 1.8.1.2
> 

Thanks,
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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Re: [PATCH 2/2] fb: backlight: HX8357: Add HX8369 support

[Jean-Christophe PLAGNIOL-VILLARD]

On 20:27 Fri 21 Jun     , Alexandre Belloni wrote:
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> ---
>  drivers/video/backlight/hx8357.c | 183 +++++++++++++++++++++++++++++++++++++--
>  1 file changed, 175 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/video/backlight/hx8357.c b/drivers/video/backlight/hx8357.c
> index 69f5672..b1c4042 100644
> --- a/drivers/video/backlight/hx8357.c
> +++ b/drivers/video/backlight/hx8357.c
> @@ -71,6 +71,18 @@
>  #define HX8357_SET_POWER_NORMAL		0xd2
>  #define HX8357_SET_PANEL_RELATED	0xe9
>  
> +#define HX8369_SET_DISPLAY_BRIGHTNESS		0x51
> +#define HX8369_WRITE_CABC_DISPLAY_VALUE		0x53
> +#define HX8369_WRITE_CABC_BRIGHT_CTRL		0x55
> +#define HX8369_WRITE_CABC_MIN_BRIGHTNESS	0x5e
> +#define HX8369_SET_POWER			0xb1
> +#define HX8369_SET_DISPLAY_MODE			0xb2
> +#define HX8369_SET_DISPLAY_WAVEFORM_CYC		0xb4
> +#define HX8369_SET_VCOM				0xb6
> +#define HX8369_SET_EXTENSION_COMMAND		0xb9
> +#define HX8369_SET_GIP				0xd5
> +#define HX8369_SET_GAMMA_CURVE_RELATED		0xe0
> +
>  struct hx8357_data {
>  	unsigned		im_pins[HX8357_NUM_IM_PINS];
>  	unsigned		reset;
> @@ -144,6 +156,61 @@ static u8 hx8357_seq_display_mode[] = {
>  	HX8357_SET_DISPLAY_MODE_RGB_INTERFACE,
>  };
>  
> +static u8 hx8369_seq_write_CABC_min_brightness[] = {
> +	HX8369_WRITE_CABC_MIN_BRIGHTNESS, 0x00,
> +};
> +
> +static u8 hx8369_seq_write_CABC_control[] = {
> +	HX8369_WRITE_CABC_DISPLAY_VALUE, 0x24,
> +};
> +
> +static u8 hx8369_seq_set_display_brightness[] = {
> +	HX8369_SET_DISPLAY_BRIGHTNESS, 0xFF,
> +};
> +
> +static u8 hx8369_seq_write_CABC_control_setting[] = {
> +	HX8369_WRITE_CABC_BRIGHT_CTRL, 0x02,
> +};
> +
> +static u8 hx8369_seq_extension_command[] = {
> +	HX8369_SET_EXTENSION_COMMAND, 0xff, 0x83, 0x69,
> +};
> +
> +static u8 hx8369_seq_display_related[] = {
> +	HX8369_SET_DISPLAY_MODE, 0x00, 0x2b, 0x03, 0x03, 0x70, 0x00,
> +	0xff, 0x00, 0x00, 0x00, 0x00, 0x03, 0x03, 0x00,	0x01,
> +};
> +
> +static u8 hx8369_seq_panel_waveform_cycle[] = {
> +	HX8369_SET_DISPLAY_WAVEFORM_CYC, 0x0a, 0x1d, 0x80, 0x06, 0x02,
> +};
> +
> +static u8 hx8369_seq_set_address_mode[] = {
> +	HX8357_SET_ADDRESS_MODE, 0x00,
> +};
> +
> +static u8 hx8369_seq_vcom[] = {
> +	HX8369_SET_VCOM, 0x3e, 0x3e,
> +};
> +
> +static u8 hx8369_seq_gip[] = {
> +	HX8369_SET_GIP, 0x00, 0x01, 0x03, 0x25, 0x01, 0x02, 0x28, 0x70,
> +	0x11, 0x13, 0x00, 0x00, 0x40, 0x26, 0x51, 0x37, 0x00, 0x00, 0x71,
> +	0x35, 0x60, 0x24, 0x07, 0x0f, 0x04, 0x04,
> +};
> +
> +static u8 hx8369_seq_power[] = {
> +	HX8369_SET_POWER, 0x01, 0x00, 0x34, 0x03, 0x00, 0x11, 0x11, 0x32,
> +	0x2f, 0x3f, 0x3f, 0x01, 0x3a, 0x01, 0xe6, 0xe6, 0xe6, 0xe6, 0xe6,
> +};
> +
> +static u8 hx8369_seq_gamma_curve_related[] = {
> +	HX8369_SET_GAMMA_CURVE_RELATED, 0x00, 0x0d, 0x19, 0x2f, 0x3b, 0x3d,
> +	0x2e, 0x4a, 0x08, 0x0e, 0x0f, 0x14, 0x16, 0x14, 0x14, 0x14, 0x1e,
> +	0x00, 0x0d, 0x19, 0x2f, 0x3b, 0x3d, 0x2e, 0x4a, 0x08, 0x0e, 0x0f,
> +	0x14, 0x16, 0x14, 0x14, 0x14, 0x1e,
> +};
> +
>  static int hx8357_spi_write_then_read(struct lcd_device *lcdev,
>  				u8 *txbuf, u16 txlen,
>  				u8 *rxbuf, u16 rxlen)
> @@ -242,6 +309,16 @@ static int hx8357_exit_standby(struct lcd_device *lcdev)
>  	return 0;
>  }
>  
> +static void hx8357_lcd_reset(struct hx8357_data *lcd)
> +{
> +	gpio_set_value(lcd->reset, 1);
> +	usleep_range(10000, 12000);
> +	gpio_set_value(lcd->reset, 0);
> +	usleep_range(10000, 12000);
> +	gpio_set_value(lcd->reset, 1);
> +	msleep(120);
> +}
> +
>  static int hx8357_lcd_init(struct lcd_device *lcdev)
>  {
>  	struct hx8357_data *lcd = lcd_get_data(lcdev);
> @@ -257,13 +334,7 @@ static int hx8357_lcd_init(struct lcd_device *lcdev)
>  		gpio_set_value_cansleep(lcd->im_pins[2], 1);
>  	}
>  
> -	/* Reset the screen */
> -	gpio_set_value(lcd->reset, 1);
> -	usleep_range(10000, 12000);
> -	gpio_set_value(lcd->reset, 0);
> -	usleep_range(10000, 12000);
> -	gpio_set_value(lcd->reset, 1);
> -	msleep(120);
> +	hx8357_lcd_reset(lcd);
>  
>  	ret = hx8357_spi_write_array(lcdev, hx8357_seq_power,
>  				ARRAY_SIZE(hx8357_seq_power));
> @@ -359,6 +430,97 @@ static int hx8357_lcd_init(struct lcd_device *lcdev)
>  	return 0;
>  }
>  
> +static int hx8369_lcd_init(struct lcd_device *lcdev)
> +{
> +	struct hx8357_data *lcd = lcd_get_data(lcdev);
> +	int ret;
> +
> +	hx8357_lcd_reset(lcd);
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_extension_command,
> +				ARRAY_SIZE(hx8369_seq_extension_command));
> +	if (ret < 0)
> +		return ret;
> +	usleep_range(10000, 12000);
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_display_related,
> +				ARRAY_SIZE(hx8369_seq_display_related));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_panel_waveform_cycle,
> +				ARRAY_SIZE(hx8369_seq_panel_waveform_cycle));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_set_address_mode,
> +				ARRAY_SIZE(hx8369_seq_set_address_mode));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_vcom,
> +				ARRAY_SIZE(hx8369_seq_vcom));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_gip,
> +				ARRAY_SIZE(hx8369_seq_gip));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_power,
> +				ARRAY_SIZE(hx8369_seq_power));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_byte(lcdev, HX8357_EXIT_SLEEP_MODE);
> +	if (ret < 0)
> +		return ret;
> +
> +	msleep(120);
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_gamma_curve_related,
> +				ARRAY_SIZE(hx8369_seq_gamma_curve_related));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_byte(lcdev, HX8357_EXIT_SLEEP_MODE);
> +	if (ret < 0)
> +		return ret;
> +	usleep_range(1000, 1200);
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_write_CABC_control,
> +				ARRAY_SIZE(hx8369_seq_write_CABC_control));
> +	if (ret < 0)
> +		return ret;
> +	usleep_range(10000, 12000);
> +
> +	ret = hx8357_spi_write_array(lcdev,
> +			hx8369_seq_write_CABC_control_setting,
> +			ARRAY_SIZE(hx8369_seq_write_CABC_control_setting));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_array(lcdev,
> +			hx8369_seq_write_CABC_min_brightness,
> +			ARRAY_SIZE(hx8369_seq_write_CABC_min_brightness));
> +	if (ret < 0)
> +		return ret;
> +	usleep_range(10000, 12000);
> +
> +	ret = hx8357_spi_write_array(lcdev, hx8369_seq_set_display_brightness,
> +				ARRAY_SIZE(hx8369_seq_set_display_brightness));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = hx8357_spi_write_byte(lcdev, HX8357_SET_DISPLAY_ON);
> +	if (ret < 0)
> +		return ret;
> +	msleep(100);
> +
> +	return 0;
> +}
> +
>  #define POWER_IS_ON(pwr)	((pwr) <= FB_BLANK_NORMAL)
>  
>  static int hx8357_set_power(struct lcd_device *lcdev, int power)
> @@ -461,7 +623,11 @@ static int hx8357_probe(struct spi_device *spi)
>  	}
>  	spi_set_drvdata(spi, lcdev);
>  
> -	ret = hx8357_lcd_init(lcdev);
> +	ret = -ENODEV;
> +	if (of_device_is_compatible(spi->dev.of_node, "himax,hx8357"))
> +		ret = hx8357_lcd_init(lcdev);
> +	else if (of_device_is_compatible(spi->dev.of_node, "himax,hx8369"))
> +		ret = hx8369_lcd_init(lcdev);
so use the data from the compatible to get the function pointer
and does not have to do a list of if/else compatible
>  	if (ret) {
>  		dev_err(&spi->dev, "Couldn't initialize panel\n");
>  		goto init_error;
> @@ -486,6 +652,7 @@ static int hx8357_remove(struct spi_device *spi)
>  
>  static const struct of_device_id hx8357_dt_ids[] = {
>  	{ .compatible = "himax,hx8357" },
> +	{ .compatible = "himax,hx8369" },
>  	{},
>  };
>  MODULE_DEVICE_TABLE(of, hx8357_dt_ids);
> -- 
> 1.8.1.2
> 

Re: [PATCH 1/2] fb: backlight: HX8357: Make IM pins optionnal

[Jean-Christophe PLAGNIOL-VILLARD]

On 20:27 Fri 21 Jun     , Alexandre Belloni wrote:
> From: Maxime Ripard <maxime.ripard@free-electrons.com>
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> ---
>  drivers/video/backlight/hx8357.c | 53 +++++++++++++++++++++++-----------------
>  1 file changed, 31 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/video/backlight/hx8357.c b/drivers/video/backlight/hx8357.c
> index a0482b5..69f5672 100644
> --- a/drivers/video/backlight/hx8357.c
> +++ b/drivers/video/backlight/hx8357.c
> @@ -76,6 +76,7 @@ struct hx8357_data {
>  	unsigned		reset;
>  	struct spi_device	*spi;
>  	int			state;
> +	u8			use_im_pins;
boolean please
>  };
>  
>  static u8 hx8357_seq_power[] = {
> @@ -250,9 +251,11 @@ static int hx8357_lcd_init(struct lcd_device *lcdev)
>  	 * Set the interface selection pins to SPI mode, with three
>  	 * wires
>  	 */
> -	gpio_set_value_cansleep(lcd->im_pins[0], 1);
> -	gpio_set_value_cansleep(lcd->im_pins[1], 0);
> -	gpio_set_value_cansleep(lcd->im_pins[2], 1);
> +	if (lcd->use_im_pins) {
> +		gpio_set_value_cansleep(lcd->im_pins[0], 1);
> +		gpio_set_value_cansleep(lcd->im_pins[1], 0);
> +		gpio_set_value_cansleep(lcd->im_pins[2], 1);
> +	}

base on the dt probe you may have gpios betwee 0 to HX8357_NUM_IM_PINS

so this look wrong
>  
>  	/* Reset the screen */
>  	gpio_set_value(lcd->reset, 1);
> @@ -424,26 +427,32 @@ static int hx8357_probe(struct spi_device *spi)
>  		return -EINVAL;
>  	}
>  
> -	for (i = 0; i < HX8357_NUM_IM_PINS; i++) {
> -		lcd->im_pins[i] = of_get_named_gpio(spi->dev.of_node,
> -						"im-gpios", i);
> -		if (lcd->im_pins[i] = -EPROBE_DEFER) {
> -			dev_info(&spi->dev, "GPIO requested is not here yet, deferring the probe\n");
> -			return -EPROBE_DEFER;
> -		}
> -		if (!gpio_is_valid(lcd->im_pins[i])) {
> -			dev_err(&spi->dev, "Missing dt property: im-gpios\n");
> -			return -EINVAL;
> +	if (of_find_property(spi->dev.of_node, "im-gpios", NULL)) {
> +		lcd->use_im_pins = 1;
> +
> +		for (i = 0; i < HX8357_NUM_IM_PINS; i++) {
> +			lcd->im_pins[i] = of_get_named_gpio(spi->dev.of_node,
> +							    "im-gpios", i);
> +			if (lcd->im_pins[i] = -EPROBE_DEFER) {
> +				dev_info(&spi->dev, "GPIO requested is not here yet, deferring the probe\n");
> +				return -EPROBE_DEFER;
> +			}
> +			if (!gpio_is_valid(lcd->im_pins[i])) {
> +				dev_err(&spi->dev, "Missing dt property: im-gpios\n");
> +				return -EINVAL;
> +			}
> +
> +			ret = devm_gpio_request_one(&spi->dev, lcd->im_pins[i],
> +						    GPIOF_OUT_INIT_LOW,
> +						    "im_pins");
> +			if (ret) {
> +				dev_err(&spi->dev, "failed to request gpio %d: %d\n",
> +					lcd->im_pins[i], ret);
> +				return -EINVAL;
> +			}
>  		}
> -
> -		ret = devm_gpio_request_one(&spi->dev, lcd->im_pins[i],
> -					GPIOF_OUT_INIT_LOW, "im_pins");
> -		if (ret) {
> -			dev_err(&spi->dev, "failed to request gpio %d: %d\n",
> -				lcd->im_pins[i], ret);
> -			return -EINVAL;
> -		}
> -	}
> +	} else
> +		lcd->use_im_pins = 0;
>  
>  	lcdev = lcd_device_register("mxsfb", &spi->dev, lcd, &hx8357_ops);
>  	if (IS_ERR(lcdev)) {
> -- 
> 1.8.1.2
> 

Re: [PATCH 1/2] fb: backlight: HX8357: Make IM pins optionnal

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 1894 bytes --]

Hi Jean Christophe,

On Mon, Jun 24, 2013 at 04:26:45PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 20:27 Fri 21 Jun     , Alexandre Belloni wrote:
> > From: Maxime Ripard <maxime.ripard@free-electrons.com>
> > 
> > Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> > Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> > ---
> >  drivers/video/backlight/hx8357.c | 53 +++++++++++++++++++++++-----------------
> >  1 file changed, 31 insertions(+), 22 deletions(-)
> > 
> > diff --git a/drivers/video/backlight/hx8357.c b/drivers/video/backlight/hx8357.c
> > index a0482b5..69f5672 100644
> > --- a/drivers/video/backlight/hx8357.c
> > +++ b/drivers/video/backlight/hx8357.c
> > @@ -76,6 +76,7 @@ struct hx8357_data {
> >  	unsigned		reset;
> >  	struct spi_device	*spi;
> >  	int			state;
> > +	u8			use_im_pins;
> boolean please

Ok.

> >  };
> >  
> >  static u8 hx8357_seq_power[] = {
> > @@ -250,9 +251,11 @@ static int hx8357_lcd_init(struct lcd_device *lcdev)
> >  	 * Set the interface selection pins to SPI mode, with three
> >  	 * wires
> >  	 */
> > -	gpio_set_value_cansleep(lcd->im_pins[0], 1);
> > -	gpio_set_value_cansleep(lcd->im_pins[1], 0);
> > -	gpio_set_value_cansleep(lcd->im_pins[2], 1);
> > +	if (lcd->use_im_pins) {
> > +		gpio_set_value_cansleep(lcd->im_pins[0], 1);
> > +		gpio_set_value_cansleep(lcd->im_pins[1], 0);
> > +		gpio_set_value_cansleep(lcd->im_pins[2], 1);
> > +	}
> 
> base on the dt probe you may have gpios betwee 0 to HX8357_NUM_IM_PINS
> 
> so this look wrong

How so?

HX8357_NUM_IM_PINS is defined to 3, the probe checks to see if we
actually have HX8357_NUM_IM_PINS, otherwise returns an error, what is
wrong in setting these pins here?

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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Re: [PATCH 1/2] fb: backlight: HX8357: Make IM pins optionnal

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 1200 bytes --]

On Tue, Jun 25, 2013 at 03:50:15PM +0200, Maxime Ripard wrote:
> > >  };
> > >  
> > >  static u8 hx8357_seq_power[] = {
> > > @@ -250,9 +251,11 @@ static int hx8357_lcd_init(struct lcd_device *lcdev)
> > >  	 * Set the interface selection pins to SPI mode, with three
> > >  	 * wires
> > >  	 */
> > > -	gpio_set_value_cansleep(lcd->im_pins[0], 1);
> > > -	gpio_set_value_cansleep(lcd->im_pins[1], 0);
> > > -	gpio_set_value_cansleep(lcd->im_pins[2], 1);
> > > +	if (lcd->use_im_pins) {
> > > +		gpio_set_value_cansleep(lcd->im_pins[0], 1);
> > > +		gpio_set_value_cansleep(lcd->im_pins[1], 0);
> > > +		gpio_set_value_cansleep(lcd->im_pins[2], 1);
> > > +	}
> > 
> > base on the dt probe you may have gpios betwee 0 to HX8357_NUM_IM_PINS
> > 
> > so this look wrong
> 
> How so?
> 
> HX8357_NUM_IM_PINS is defined to 3, the probe checks to see if we
> actually have HX8357_NUM_IM_PINS, otherwise returns an error, what is
> wrong in setting these pins here?

Ping?

I'd really like to get this merged, could you clarify what you want?

Thanks,
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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