Subject: [PATCH] [acpi video] Add device proc interface

- Add these files:
  - info (ro)
  - EDID (ro)
  - state (rw)
  - brightness (rw)

Should be compatible with the legacy interface..

Signed-off-by: Patrick Mochel <mochel@linux.intel.com>

---

 drivers/acpi/drivers/video/dev-proc.c |  166 +++++++++++++++++++++++++++++++++
 1 files changed, 165 insertions(+), 1 deletions(-)

applies-to: 259218663e48b1d6263f0d303d01b8df9d88b8fd
72723f17185a98eebd96b50a01944358cf76c6bf
diff --git a/drivers/acpi/drivers/video/dev-proc.c b/drivers/acpi/drivers/video/dev-proc.c
index 710d731..9a93059 100644
--- a/drivers/acpi/drivers/video/dev-proc.c
+++ b/drivers/acpi/drivers/video/dev-proc.c
@@ -13,4 +13,168 @@
 #include <acpi/driver.h>
 #include "video.h"
 
-acpi_driver_proc_none(video);
+
+static int read_info(struct seq_file * seq, void * offset)
+{
+	struct acpi_dev * ad = seq->private;
+	struct acpi_video_dev * vd = dev_get_drvdata(&ad->dev);
+
+	seq_printf(seq, "device_id:     %#04x\n", vd->v_id.v_device_id);
+	seq_printf(seq, "type:          %s\n", video_dev_string(vd));
+	seq_printf(seq, "known by bios: %s\n", 
+		   vd->v_id.v_bios_detect ? "yes" : "no");
+
+	return 0;
+}
+
+static int open_info(struct inode * inode, struct file * file)
+{
+	return single_open(file, read_info, PDE(inode)->data);
+}
+
+
+static int read_state(struct seq_file * seq, void * offset)
+{
+	struct acpi_dev * ad = seq->private;
+	struct acpi_video_dev * vd = dev_get_drvdata(&ad->dev);
+	u32 output_state, graphics_state;
+	int ret = 0;
+
+	if (vd->v_hotkey) {
+		ret = video_dev_get_state(vd, &output_state, &graphics_state);
+		if (!ret) {
+			seq_printf(seq, "state:     %#02x\n", output_state);
+			seq_printf(seq, "query:     %#02x\n", graphics_state);
+		}
+	} else {
+		seq_printf(seq, "state:     <not supported>\n");	
+		seq_printf(seq, "query:     <not supported>\n");
+	}
+	return ret;
+}
+
+static ssize_t write_state(struct file *file, const char __user * buffer,
+			   size_t count, loff_t * ppos)
+{
+	struct seq_file * m = file->private_data;
+	struct acpi_dev * ad = m->private;
+	struct acpi_video_dev * vd = dev_get_drvdata(&ad->dev);
+
+	unsigned long state;
+	char str[12] = "";
+	char * end;
+	int ret;
+
+	if (count < 1 || count >= sizeof(str))
+		return -EINVAL;
+
+	if (copy_from_user(str, buffer, count))
+		return -EFAULT;
+
+	state = strtoul(str, &end, 0);
+	if (*end != '\0')
+		return -EINVAL;
+
+	/*
+	 * Mask off invalid values
+	 */
+	state &= 0xc0000001;
+
+	ret = video_dev_set_state(vd, state);
+
+	return ret == 0 ? count : ret;
+}
+
+static int open_state(struct inode * inode, struct file * file)
+{
+	return single_open(file, read_state, PDE(inode)->data);
+}
+
+
+static int read_EDID(struct seq_file * seq, void * offset)
+{
+	struct acpi_dev * ad = seq->private;
+	struct acpi_video_dev * vd = dev_get_drvdata(&ad->dev);
+	char * buffer;
+	size_t len;
+	int ret;
+	int i;
+
+	ret = video_dev_edid(vd, &buffer, &len);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < len; i++)
+		seq_putc(seq, buffer[i]);
+
+	kfree(buffer);
+	return 0;
+}
+
+static int open_EDID(struct inode * inode, struct file * file)
+{
+	return single_open(file, read_EDID, PDE(inode)->data);
+}
+
+
+static int read_brightness(struct seq_file * seq, void * offset)
+{
+	struct acpi_dev * ad = seq->private;
+	struct acpi_video_dev * vd = dev_get_drvdata(&ad->dev);
+	int i;
+
+	if (vd->v_br) {
+		seq_printf(seq, "levels: ");
+		for (i = 0; i < vd->v_br_num; i++)
+			seq_printf(seq, " %d", vd->v_br_levels[i]);
+		seq_printf(seq, "\n");
+		seq_printf(seq, "current: %d\n", vd->v_br_current);
+	} else
+		seq_printf(seq, "query:     <not supported>\n");
+	return 0;
+}
+
+static ssize_t write_brightness(struct file *file, const char __user * buffer,
+				size_t count, loff_t * ppos)
+{
+	struct seq_file * m = file->private_data;
+	struct acpi_dev * ad = m->private;
+	struct acpi_video_dev * vd = dev_get_drvdata(&ad->dev);
+
+	unsigned long level;
+	char str[12] = "";
+	char * end;
+	int ret;
+
+	if (!vd->v_lcd)
+		return -EIO;
+
+	if (count < 1 || count >= sizeof(str))
+		return -EINVAL;
+
+	if (copy_from_user(str, buffer, count))
+		return -EFAULT;
+
+	level = strtoul(str, &end, 0);
+	if (*end != '\0')
+		return -EINVAL;
+
+	ret = video_dev_set_lcd(vd, level);
+
+	return ret == 0 ? count : ret;
+}
+
+static int open_brightness(struct inode * inode, struct file * file)
+{
+	return single_open(file, read_brightness, PDE(inode)->data);
+}
+
+
+static struct acpi_proc_file video_files[] = {
+	proc_file_ro(info),
+	proc_file_ro(EDID),
+	proc_file_rw(state),
+	proc_file_rw(brightness),
+};
+
+acpi_driver_proc(video);
---
0.99.9.GIT