ssd16xx_pm_device.patch

diff --git a/drivers/display/ssd16xx.c b/drivers/display/ssd16xx.c
index 7dfaa121177..d6229c34b88 100644
--- a/drivers/display/ssd16xx.c
+++ b/drivers/display/ssd16xx.c
@@ -16,6 +16,8 @@ LOG_MODULE_REGISTER(ssd16xx);
 #include <zephyr/init.h>
 #include <zephyr/drivers/gpio.h>
 #include <zephyr/drivers/mipi_dbi.h>
+#include <zephyr/pm/device.h>
+#include <zephyr/pm/device_runtime.h>
 #include <zephyr/sys/byteorder.h>
 
 #include <zephyr/display/ssd16xx.h>
@@ -756,10 +758,12 @@ static int ssd16xx_set_profile(const struct device *dev,
 	 * Perform a soft reset to make sure registers are reset. This
 	 * will leave the RAM contents intact.
 	 */
+	/*
 	err = ssd16xx_write_cmd(dev, SSD16XX_CMD_SW_RESET, NULL, 0);
 	if (err < 0) {
 		return err;
 	}
+	*/
 
 	gdo_len = push_y_param(dev, gdo, last_gate);
 	gdo[gdo_len++] = 0U;
@@ -863,6 +867,15 @@ static int ssd16xx_controller_init(const struct device *dev)
 
 	k_msleep(SSD16XX_RESET_DELAY);
 
+	/*
+	err = ssd16xx_write_cmd(config->mipi_dev, SSD16XX_CMD_SW_RESET, NULL, 0);
+	if (err < 0) {
+		return err;
+	}
+
+	k_msleep(SSD16XX_RESET_DELAY);
+	*/
+
 	err = ssd16xx_set_profile(dev, SSD16XX_PROFILE_FULL);
 	if (err < 0) {
 		return err;
@@ -937,6 +950,38 @@ static int ssd16xx_init(const struct device *dev)
 	return ssd16xx_controller_init(dev);
 }
 
+#ifdef CONFIG_PM_DEVICE
+static int ssd16xx_pm_action(const struct device *dev,
+			     enum pm_device_action action)
+{
+	int err = 0;
+	const struct ssd16xx_config *config = dev->config;
+
+	switch (action) {
+	case PM_DEVICE_ACTION_RESUME:
+		err = ssd16xx_controller_init(dev);
+		if (err < 0) {
+			return err;
+		}
+		break;
+
+	case PM_DEVICE_ACTION_SUSPEND:
+		err = ssd16xx_write_uint8(dev, SSD16XX_CMD_SLEEP_MODE, 0x01);
+		if (err < 0) {
+			return err;
+		}
+
+		k_msleep(SSD16XX_BUSY_DELAY);
+		break;
+
+	default:
+		err = -ENOTSUP;
+	}
+
+	return err;
+}
+#endif /* CONFIG_PM_DEVICE */
+
 static const struct display_driver_api ssd16xx_driver_api = {
 	.blanking_on = ssd16xx_blanking_on,
 	.blanking_off = ssd16xx_blanking_off,
@@ -1075,14 +1120,16 @@ static struct ssd16xx_quirks quirks_solomon_ssd1681 = {
 									\
 	static struct ssd16xx_data ssd16xx_data_ ## n;			\
 									\
+	PM_DEVICE_DT_DEFINE(n, ssd16xx_pm_action);			\
 	DEVICE_DT_DEFINE(n,						\
-			 ssd16xx_init, NULL,				\
+			 ssd16xx_init, PM_DEVICE_DT_GET(n),		\
 			 &ssd16xx_data_ ## n,				\
 			 &ssd16xx_cfg_ ## n,				\
 			 POST_KERNEL,					\
 			 CONFIG_DISPLAY_INIT_PRIORITY,			\
 			 &ssd16xx_driver_api)
 
+
 DT_FOREACH_STATUS_OKAY_VARGS(solomon_ssd1608, SSD16XX_DEFINE,
 			     &quirks_solomon_ssd1608);
 DT_FOREACH_STATUS_OKAY_VARGS(solomon_ssd1673, SSD16XX_DEFINE,
diff --git a/drivers/display/ssd16xx_regs.h b/drivers/display/ssd16xx_regs.h
index 7202109b798..c3578d5df36 100644
--- a/drivers/display/ssd16xx_regs.h
+++ b/drivers/display/ssd16xx_regs.h
@@ -78,7 +78,8 @@
 #define SSD16XX_GEN2_CTRL2_MODE2		0x08
 #define SSD16XX_GEN2_CTRL2_DISPLAY		0x04
 
-#define SSD16XX_SLEEP_MODE_DSM			0x01
+#define SSD16XX_SLEEP_MODE_DSM_1	        0x01
+#define SSD16XX_SLEEP_MODE_DSM_2	        0x03
 #define SSD16XX_SLEEP_MODE_PON			0x00
 
 #define SSD16XX_RAM_READ_CTRL_BLACK		0