DRM: add mode setting support
Add mode setting support to the DRM layer.
This is a fairly big chunk of work that allows DRM drivers to provide
full output control and configuration capabilities to userspace. It was
motivated by several factors:
- the fb layer's APIs aren't suited for anything but simple
configurations
- coordination between the fb layer, DRM layer, and various userspace
drivers is poor to non-existent (radeonfb excepted)
- user level mode setting drivers makes displaying panic & oops
messages more difficult
- suspend/resume of graphics state is possible in many more
configurations with kernel level support
This commit just adds the core DRM part of the mode setting APIs.
Driver specific commits using these new structure and APIs will follow.
Co-authors: Jesse Barnes <jbarnes@virtuousgeek.org>, Jakob Bornecrantz <jakob@tungstengraphics.com>
Contributors: Alan Hourihane <alanh@tungstengraphics.com>, Maarten Maathuis <madman2003@gmail.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c
index ea7f9e5..5ca132a 100644
--- a/drivers/gpu/drm/drm_stub.c
+++ b/drivers/gpu/drm/drm_stub.c
@@ -57,6 +57,14 @@
int ret;
int base = 0, limit = 63;
+ if (type == DRM_MINOR_CONTROL) {
+ base += 64;
+ limit = base + 127;
+ } else if (type == DRM_MINOR_RENDER) {
+ base += 128;
+ limit = base + 255;
+ }
+
again:
if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
DRM_ERROR("Out of memory expanding drawable idr\n");
@@ -362,12 +370,28 @@
printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
goto err_g2;
}
- if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
- goto err_g2;
- if (dev->driver->load)
- if ((ret = dev->driver->load(dev, ent->driver_data)))
+ if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+ ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
+ if (ret)
+ goto err_g2;
+ }
+
+ if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
+ goto err_g3;
+
+ if (dev->driver->load) {
+ ret = dev->driver->load(dev, ent->driver_data);
+ if (ret)
goto err_g3;
+ }
+
+ /* setup the grouping for the legacy output */
+ if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+ ret = drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group);
+ if (ret)
+ goto err_g3;
+ }
list_add_tail(&dev->driver_item, &driver->device_list);