add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/gpu/drm/drm_mipi_dsi.c
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@@ -221,7 +221,7 @@
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 		return dsi;
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 	}
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-	dsi->dev.of_node = info->node;
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+	device_set_node(&dsi->dev, of_fwnode_handle(info->node));
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 	dsi->channel = info->channel;
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 	strlcpy(dsi->name, info->type, sizeof(dsi->name));
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@@ -1144,6 +1144,58 @@
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 }
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 EXPORT_SYMBOL(mipi_dsi_dcs_get_display_brightness);
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+/**
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+ * mipi_dsi_dcs_set_display_brightness_large() - sets the 16-bit brightness value
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+ *    of the display
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+ * @dsi: DSI peripheral device
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+ * @brightness: brightness value
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+ *
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+ * Return: 0 on success or a negative error code on failure.
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+ */
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+int mipi_dsi_dcs_set_display_brightness_large(struct mipi_dsi_device *dsi,
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+					     u16 brightness)
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+{
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+	u8 payload[2] = { brightness >> 8, brightness & 0xff };
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+	ssize_t err;
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+
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+	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
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+				 payload, sizeof(payload));
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+	if (err < 0)
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+		return err;
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+
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+	return 0;
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+}
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+EXPORT_SYMBOL(mipi_dsi_dcs_set_display_brightness_large);
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+
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+/**
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+ * mipi_dsi_dcs_get_display_brightness_large() - gets the current 16-bit
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+ *    brightness value of the display
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+ * @dsi: DSI peripheral device
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+ * @brightness: brightness value
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+ *
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+ * Return: 0 on success or a negative error code on failure.
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+ */
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+int mipi_dsi_dcs_get_display_brightness_large(struct mipi_dsi_device *dsi,
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+					     u16 *brightness)
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+{
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+	u8 brightness_be[2];
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+	ssize_t err;
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+
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+	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_BRIGHTNESS,
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+				brightness_be, sizeof(brightness_be));
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+	if (err <= 0) {
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+		if (err == 0)
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+			err = -ENODATA;
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+
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+		return err;
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+	}
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+
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+	*brightness = (brightness_be[0] << 8) | brightness_be[1];
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+
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+	return 0;
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+}
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+EXPORT_SYMBOL(mipi_dsi_dcs_get_display_brightness_large);
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+
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 static int mipi_dsi_drv_probe(struct device *dev)
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 {
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 	struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver);