* and set up an initial configuration using the detected hardware, drivers
* should call drm_fb_helper_single_add_all_connectors() followed by
* drm_fb_helper_initial_config().
+ *
+ * If &drm_framebuffer_funcs ->dirty is set, the
+ * drm_fb_helper_{cfb,sys}_{write,fillrect,copyarea,imageblit} functions will
+ * accumulate changes and schedule &drm_fb_helper ->dirty_work to run right
+ * away. This worker then calls the dirty() function ensuring that it will
+ * always run in process context since the fb_*() function could be running in
+ * atomic context. If drm_fb_helper_deferred_io() is used as the deferred_io
+ * callback it will also schedule dirty_work with the damage collected from the
+ * mmap page writes.
*/
/**
if (!fb_helper_connector)
return -ENOMEM;
+ drm_connector_reference(connector);
fb_helper_connector->connector = connector;
fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
return 0;
}
EXPORT_SYMBOL(drm_fb_helper_add_one_connector);
-static void remove_from_modeset(struct drm_mode_set *set,
- struct drm_connector *connector)
-{
- int i, j;
-
- for (i = 0; i < set->num_connectors; i++) {
- if (set->connectors[i] == connector)
- break;
- }
-
- if (i == set->num_connectors)
- return;
-
- for (j = i + 1; j < set->num_connectors; j++) {
- set->connectors[j - 1] = set->connectors[j];
- }
- set->num_connectors--;
-
- /*
- * TODO maybe need to makes sure we set it back to !=NULL somewhere?
- */
- if (set->num_connectors == 0) {
- set->fb = NULL;
- drm_mode_destroy(connector->dev, set->mode);
- set->mode = NULL;
- }
-}
-
int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
struct drm_connector *connector)
{
if (i == fb_helper->connector_count)
return -EINVAL;
fb_helper_connector = fb_helper->connector_info[i];
+ drm_connector_unreference(fb_helper_connector->connector);
for (j = i + 1; j < fb_helper->connector_count; j++) {
fb_helper->connector_info[j - 1] = fb_helper->connector_info[j];
fb_helper->connector_count--;
kfree(fb_helper_connector);
- /* also cleanup dangling references to the connector: */
- for (i = 0; i < fb_helper->crtc_count; i++)
- remove_from_modeset(&fb_helper->crtc_info[i].mode_set, connector);
-
return 0;
}
EXPORT_SYMBOL(drm_fb_helper_remove_one_connector);
{
int i;
- for (i = 0; i < helper->connector_count; i++)
+ for (i = 0; i < helper->connector_count; i++) {
+ drm_connector_unreference(helper->connector_info[i]->connector);
kfree(helper->connector_info[i]);
+ }
kfree(helper->connector_info);
for (i = 0; i < helper->crtc_count; i++) {
kfree(helper->crtc_info[i].mode_set.connectors);
kfree(helper->crtc_info);
}
+static void drm_fb_helper_dirty_work(struct work_struct *work)
+{
+ struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper,
+ dirty_work);
+ struct drm_clip_rect *clip = &helper->dirty_clip;
+ struct drm_clip_rect clip_copy;
+ unsigned long flags;
+
+ spin_lock_irqsave(&helper->dirty_lock, flags);
+ clip_copy = *clip;
+ clip->x1 = clip->y1 = ~0;
+ clip->x2 = clip->y2 = 0;
+ spin_unlock_irqrestore(&helper->dirty_lock, flags);
+
+ helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, &clip_copy, 1);
+}
+
/**
* drm_fb_helper_prepare - setup a drm_fb_helper structure
* @dev: DRM device
const struct drm_fb_helper_funcs *funcs)
{
INIT_LIST_HEAD(&helper->kernel_fb_list);
+ spin_lock_init(&helper->dirty_lock);
+ INIT_WORK(&helper->dirty_work, drm_fb_helper_dirty_work);
+ helper->dirty_clip.x1 = helper->dirty_clip.y1 = ~0;
helper->funcs = funcs;
helper->dev = dev;
}
}
EXPORT_SYMBOL(drm_fb_helper_unlink_fbi);
+static void drm_fb_helper_dirty(struct fb_info *info, u32 x, u32 y,
+ u32 width, u32 height)
+{
+ struct drm_fb_helper *helper = info->par;
+ struct drm_clip_rect *clip = &helper->dirty_clip;
+ unsigned long flags;
+
+ if (!helper->fb->funcs->dirty)
+ return;
+
+ spin_lock_irqsave(&helper->dirty_lock, flags);
+ clip->x1 = min_t(u32, clip->x1, x);
+ clip->y1 = min_t(u32, clip->y1, y);
+ clip->x2 = max_t(u32, clip->x2, x + width);
+ clip->y2 = max_t(u32, clip->y2, y + height);
+ spin_unlock_irqrestore(&helper->dirty_lock, flags);
+
+ schedule_work(&helper->dirty_work);
+}
+
+/**
+ * drm_fb_helper_deferred_io() - fbdev deferred_io callback function
+ * @info: fb_info struct pointer
+ * @pagelist: list of dirty mmap framebuffer pages
+ *
+ * This function is used as the &fb_deferred_io ->deferred_io
+ * callback function for flushing the fbdev mmap writes.
+ */
+void drm_fb_helper_deferred_io(struct fb_info *info,
+ struct list_head *pagelist)
+{
+ unsigned long start, end, min, max;
+ struct page *page;
+ u32 y1, y2;
+
+ min = ULONG_MAX;
+ max = 0;
+ list_for_each_entry(page, pagelist, lru) {
+ start = page->index << PAGE_SHIFT;
+ end = start + PAGE_SIZE - 1;
+ min = min(min, start);
+ max = max(max, end);
+ }
+
+ if (min < max) {
+ y1 = min / info->fix.line_length;
+ y2 = min_t(u32, DIV_ROUND_UP(max, info->fix.line_length),
+ info->var.yres);
+ drm_fb_helper_dirty(info, 0, y1, info->var.xres, y2 - y1);
+ }
+}
+EXPORT_SYMBOL(drm_fb_helper_deferred_io);
+
/**
* drm_fb_helper_sys_read - wrapper around fb_sys_read
* @info: fb_info struct pointer
ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf,
size_t count, loff_t *ppos)
{
- return fb_sys_write(info, buf, count, ppos);
+ ssize_t ret;
+
+ ret = fb_sys_write(info, buf, count, ppos);
+ if (ret > 0)
+ drm_fb_helper_dirty(info, 0, 0, info->var.xres,
+ info->var.yres);
+
+ return ret;
}
EXPORT_SYMBOL(drm_fb_helper_sys_write);
const struct fb_fillrect *rect)
{
sys_fillrect(info, rect);
+ drm_fb_helper_dirty(info, rect->dx, rect->dy,
+ rect->width, rect->height);
}
EXPORT_SYMBOL(drm_fb_helper_sys_fillrect);
const struct fb_copyarea *area)
{
sys_copyarea(info, area);
+ drm_fb_helper_dirty(info, area->dx, area->dy,
+ area->width, area->height);
}
EXPORT_SYMBOL(drm_fb_helper_sys_copyarea);
const struct fb_image *image)
{
sys_imageblit(info, image);
+ drm_fb_helper_dirty(info, image->dx, image->dy,
+ image->width, image->height);
}
EXPORT_SYMBOL(drm_fb_helper_sys_imageblit);
const struct fb_fillrect *rect)
{
cfb_fillrect(info, rect);
+ drm_fb_helper_dirty(info, rect->dx, rect->dy,
+ rect->width, rect->height);
}
EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect);
const struct fb_copyarea *area)
{
cfb_copyarea(info, area);
+ drm_fb_helper_dirty(info, area->dx, area->dy,
+ area->width, area->height);
}
EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea);
const struct fb_image *image)
{
cfb_imageblit(info, image);
+ drm_fb_helper_dirty(info, image->dx, image->dy,
+ image->width, image->height);
}
EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit);
int n, int width, int height)
{
int c, o;
- struct drm_device *dev = fb_helper->dev;
struct drm_connector *connector;
const struct drm_connector_helper_funcs *connector_funcs;
struct drm_encoder *encoder;
if (modes[n] == NULL)
return best_score;
- crtcs = kzalloc(dev->mode_config.num_connector *
+ crtcs = kzalloc(fb_helper->connector_count *
sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
if (!crtcs)
return best_score;
if (score > best_score) {
best_score = score;
memcpy(best_crtcs, crtcs,
- dev->mode_config.num_connector *
+ fb_helper->connector_count *
sizeof(struct drm_fb_helper_crtc *));
}
}
* cmdline option.
*
* The other option is to just disable fbdev emulation since very likely the
- * first modest from userspace will crash in the same way, and is even easier to
- * debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0
+ * first modeset from userspace will crash in the same way, and is even easier
+ * to debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0
* kernel cmdline option.
*
* RETURNS:
* hotplug interrupt).
*
* Note that drivers may call this even before calling
- * drm_fb_helper_initial_config but only aftert drm_fb_helper_init. This allows
+ * drm_fb_helper_initial_config but only after drm_fb_helper_init. This allows
* for a race-free fbcon setup and will make sure that the fbdev emulation will
* not miss any hotplug events.
*
projects / cascardo / linux.git / blobdiff