Signed-off-by: Louis Chauvet <[email protected]>
---
drivers/gpu/drm/vkms/vkms_configfs.c | 75 ++++++++++++++++++++++++++++++++++++
1 file changed, 75 insertions(+)
diff --git a/drivers/gpu/drm/vkms/vkms_configfs.c
b/drivers/gpu/drm/vkms/vkms_configfs.c
index
ef9a00c41b7b030d0d60ffe078809f9799539f40..a1ddf25ab6f882ae1857bc82fb4b4a425b6d287d
100644
--- a/drivers/gpu/drm/vkms/vkms_configfs.c
+++ b/drivers/gpu/drm/vkms/vkms_configfs.c
@@ -355,6 +355,79 @@ static ssize_t plane_default_color_encoding_store(struct
config_item *item,
return count;
}
+static ssize_t plane_supported_formats_show(struct config_item *item, char
*page)
+{
+ struct vkms_config_plane *plane =
plane_item_to_vkms_configfs_plane(item)->vkms_config_plane;
+ struct vkms_configfs_device *vkms_configfs =
plane_item_to_vkms_configfs_device(item);
+
+ page[0] = '\0';
+
+ scoped_guard(mutex, &vkms_configfs->lock)
+ {
+ for (int i = 0; i < plane->supported_formats_count; i++) {
+ char tmp[6] = { 0 };
+ const ssize_t ret = snprintf(tmp, ARRAY_SIZE(tmp),
"%.*s\n",
+
(int)sizeof(plane->supported_formats[i]),
+ (char
*)&plane->supported_formats[i]);
+ if (ret < 0)
+ return ret;
+ /* Limitation of ConfigFS attributes, an attribute
can't be bigger than PAGE_SIZE */
+ if (ret + strlen(page) > PAGE_SIZE - 1)
+ return -ENOMEM;
+ strncat(page, tmp, ARRAY_SIZE(tmp));
+ }
+ }
+
+ return strlen(page);
+}
+
+static ssize_t plane_supported_formats_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct vkms_config_plane *plane =
plane_item_to_vkms_configfs_plane(item)->vkms_config_plane;
+ struct vkms_configfs_device *vkms_configfs =
plane_item_to_vkms_configfs_device(item);
+ int ret = 0;
+ int ptr = 0;
+
+ scoped_guard(mutex, &vkms_configfs->lock)
+ {
+ while (ptr < count) {
+ if (page[ptr] == '+') {
+ char tmp[4] = { ' ', ' ', ' ', ' ' };
+
+ memcpy(tmp, &page[ptr + 1], min(sizeof(tmp),
count - (ptr + 1)));
+ if (tmp[0] == '*') {
+ ret =
vkms_config_plane_add_all_formats(plane);
+ if (ret)
+ return ret;
+ ptr += 1;
+ } else {
+ ret =
vkms_config_plane_add_format(plane, *(int *)tmp);
+ if (ret)
+ return ret;
+ ptr += 4;
+ }
+ } else if (page[ptr] == '-') {
+ char tmp[4] = { ' ', ' ', ' ', ' ' };
+
+ memcpy(tmp, &page[ptr + 1], min(sizeof(tmp),
count - (ptr + 1)));
+ if (tmp[0] == '*') {
+
vkms_config_plane_remove_all_formats(plane);
+ ptr += 1;
+ } else {
+ vkms_config_plane_remove_format(plane,
*(int *)tmp);
+
+ ptr += 4;
+ }
+ }
+ /* Skip anything that is not a + or a - */
+ ptr += 1;
+ }
+ }
+
+ return count;
+}
+
CONFIGFS_ATTR(plane_, type);
CONFIGFS_ATTR(plane_, supported_rotations);
CONFIGFS_ATTR(plane_, default_rotation);
@@ -362,6 +435,7 @@ CONFIGFS_ATTR(plane_, color_range);
CONFIGFS_ATTR(plane_, default_color_range);
CONFIGFS_ATTR(plane_, supported_color_encoding);
CONFIGFS_ATTR(plane_, default_color_encoding);
+CONFIGFS_ATTR(plane_, supported_formats);
static struct configfs_attribute *plane_attrs[] = {
&plane_attr_type,
@@ -371,6 +445,7 @@ static struct configfs_attribute *plane_attrs[] = {
&plane_attr_default_color_range,
&plane_attr_supported_color_encoding,
&plane_attr_default_color_encoding,
+ &plane_attr_supported_formats,
NULL,
};
--
2.47.0
