diff options
Diffstat (limited to 'meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0044-DSS2-add-sysfs-entry-for-seting-the-rotate-type.patch')
| -rw-r--r-- | meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0044-DSS2-add-sysfs-entry-for-seting-the-rotate-type.patch | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0044-DSS2-add-sysfs-entry-for-seting-the-rotate-type.patch b/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0044-DSS2-add-sysfs-entry-for-seting-the-rotate-type.patch new file mode 100644 index 0000000000..32def9e8d5 --- /dev/null +++ b/meta/recipes-kernel/linux/linux-omap-2.6.29/dss2/0044-DSS2-add-sysfs-entry-for-seting-the-rotate-type.patch @@ -0,0 +1,76 @@ +From a9b3500bd14609750a2337e866e1df62627c1bac Mon Sep 17 00:00:00 2001 +From: Imre Deak <imre.deak@nokia.com> +Date: Mon, 20 Apr 2009 14:55:33 +0200 +Subject: [PATCH] DSS2: add sysfs entry for seting the rotate type + +This can help in utilizing VRAM memory better. Since with VRFB rotation +we waste a lot of physical memory due to the VRFB HW design, provide the +possibility to turn it off and free the extra memory for the use by other +planes for example. +--- + drivers/video/omap2/omapfb/omapfb-sysfs.c | 42 ++++++++++++++++++++++++++++- + 1 files changed, 41 insertions(+), 1 deletions(-) + +diff --git a/drivers/video/omap2/omapfb/omapfb-sysfs.c b/drivers/video/omap2/omapfb/omapfb-sysfs.c +index 2c88718..4e3da42 100644 +--- a/drivers/video/omap2/omapfb/omapfb-sysfs.c ++++ b/drivers/video/omap2/omapfb/omapfb-sysfs.c +@@ -43,6 +43,46 @@ static ssize_t show_rotate_type(struct device *dev, + return snprintf(buf, PAGE_SIZE, "%d\n", ofbi->rotation_type); + } + ++static ssize_t store_rotate_type(struct device *dev, ++ struct device_attribute *attr, ++ const char *buf, size_t count) ++{ ++ struct fb_info *fbi = dev_get_drvdata(dev); ++ struct omapfb_info *ofbi = FB2OFB(fbi); ++ struct omapfb2_device *fbdev = ofbi->fbdev; ++ enum omap_dss_rotation_type rot_type; ++ int r; ++ ++ rot_type = simple_strtoul(buf, NULL, 0); ++ ++ if (rot_type != OMAP_DSS_ROT_DMA && rot_type != OMAP_DSS_ROT_VRFB) ++ return -EINVAL; ++ ++ omapfb_lock(fbdev); ++ ++ r = 0; ++ if (rot_type == ofbi->rotation_type) ++ goto out; ++ ++ r = -EBUSY; ++ if (ofbi->region.size) ++ goto out; ++ ++ ofbi->rotation_type = rot_type; ++ ++ /* ++ * Since the VRAM for this FB is not allocated at the moment we don't need to ++ * do any further parameter checking at this point. ++ */ ++ ++ r = count; ++out: ++ omapfb_unlock(fbdev); ++ ++ return r; ++} ++ ++ + static ssize_t show_mirror(struct device *dev, + struct device_attribute *attr, char *buf) + { +@@ -327,7 +367,7 @@ static ssize_t show_virt(struct device *dev, + } + + static struct device_attribute omapfb_attrs[] = { +- __ATTR(rotate_type, S_IRUGO, show_rotate_type, NULL), ++ __ATTR(rotate_type, S_IRUGO | S_IWUSR, show_rotate_type, store_rotate_type), + __ATTR(mirror, S_IRUGO | S_IWUSR, show_mirror, store_mirror), + __ATTR(size, S_IRUGO | S_IWUSR, show_size, store_size), + __ATTR(overlays, S_IRUGO | S_IWUSR, show_overlays, store_overlays), +-- +1.5.6.5 + |