1 From a9b3500bd14609750a2337e866e1df62627c1bac Mon Sep 17 00:00:00 2001
2 From: Imre Deak <imre.deak@nokia.com>
3 Date: Mon, 20 Apr 2009 14:55:33 +0200
4 Subject: [PATCH] DSS2: add sysfs entry for seting the rotate type
6 This can help in utilizing VRAM memory better. Since with VRFB rotation
7 we waste a lot of physical memory due to the VRFB HW design, provide the
8 possibility to turn it off and free the extra memory for the use by other
11 drivers/video/omap2/omapfb/omapfb-sysfs.c | 42 ++++++++++++++++++++++++++++-
12 1 files changed, 41 insertions(+), 1 deletions(-)
14 diff --git a/drivers/video/omap2/omapfb/omapfb-sysfs.c b/drivers/video/omap2/omapfb/omapfb-sysfs.c
15 index 2c88718..4e3da42 100644
16 --- a/drivers/video/omap2/omapfb/omapfb-sysfs.c
17 +++ b/drivers/video/omap2/omapfb/omapfb-sysfs.c
18 @@ -43,6 +43,46 @@ static ssize_t show_rotate_type(struct device *dev,
19 return snprintf(buf, PAGE_SIZE, "%d\n", ofbi->rotation_type);
22 +static ssize_t store_rotate_type(struct device *dev,
23 + struct device_attribute *attr,
24 + const char *buf, size_t count)
26 + struct fb_info *fbi = dev_get_drvdata(dev);
27 + struct omapfb_info *ofbi = FB2OFB(fbi);
28 + struct omapfb2_device *fbdev = ofbi->fbdev;
29 + enum omap_dss_rotation_type rot_type;
32 + rot_type = simple_strtoul(buf, NULL, 0);
34 + if (rot_type != OMAP_DSS_ROT_DMA && rot_type != OMAP_DSS_ROT_VRFB)
40 + if (rot_type == ofbi->rotation_type)
44 + if (ofbi->region.size)
47 + ofbi->rotation_type = rot_type;
50 + * Since the VRAM for this FB is not allocated at the moment we don't need to
51 + * do any further parameter checking at this point.
56 + omapfb_unlock(fbdev);
62 static ssize_t show_mirror(struct device *dev,
63 struct device_attribute *attr, char *buf)
65 @@ -327,7 +367,7 @@ static ssize_t show_virt(struct device *dev,
68 static struct device_attribute omapfb_attrs[] = {
69 - __ATTR(rotate_type, S_IRUGO, show_rotate_type, NULL),
70 + __ATTR(rotate_type, S_IRUGO | S_IWUSR, show_rotate_type, store_rotate_type),
71 __ATTR(mirror, S_IRUGO | S_IWUSR, show_mirror, store_mirror),
72 __ATTR(size, S_IRUGO | S_IWUSR, show_size, store_size),
73 __ATTR(overlays, S_IRUGO | S_IWUSR, show_overlays, store_overlays),