Merge tag 'drm-misc-next-2021-03-03' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for 5.13:

UAPI Changes:

Cross-subsystem Changes:

Core Changes:
  - %p4cc printk format modifier
  - atomic: introduce drm_crtc_commit_wait, rework atomic plane state
    helpers to take the drm_commit_state structure
  - dma-buf: heaps rework to return a struct dma_buf
  - simple-kms: Add plate state helpers
  - ttm: debugfs support, removal of sysfs

Driver Changes:
  - Convert drivers to shadow plane helpers
  - arc: Move to drm/tiny
  - ast: cursor plane reworks
  - gma500: Remove TTM and medfield support
  - mxsfb: imx8mm support
  - panfrost: MMU IRQ handling rework
  - qxl: rework to better handle resources deallocation, locking
  - sun4i: Add alpha properties for UI and VI layers
  - vc4: RPi4 CEC support
  - vmwgfx: doc cleanup

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20210303100600.dgnkadonzuvfnu22@gilmour

1 files changed, 56 insertions, 10 deletions

diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 338650abd267..0dd43882fe7c 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -50,10 +50,8 @@
  * &struct drm_plane (possibly as part of a larger structure) and registers it
  * with a call to drm_universal_plane_init().
  *
- * The type of a plane is exposed in the immutable "type" enumeration property,
- * which has one of the following values: "Overlay", "Primary", "Cursor" (see
- * enum drm_plane_type). A plane can be compatible with multiple CRTCs, see
- * &drm_plane.possible_crtcs.
+ * Each plane has a type, see enum drm_plane_type. A plane can be compatible
+ * with multiple CRTCs, see &drm_plane.possible_crtcs.
  *
  * Each CRTC must have a unique primary plane userspace can attach to enable
  * the CRTC. In other words, userspace must be able to attach a different
@@ -73,6 +71,58 @@
  *
  * DRM planes have a few standardized properties:
  *
+ * type:
+ *     Immutable property describing the type of the plane.
+ *
+ *     For user-space which has enabled the &DRM_CLIENT_CAP_ATOMIC capability,
+ *     the plane type is just a hint and is mostly superseded by atomic
+ *     test-only commits. The type hint can still be used to come up more
+ *     easily with a plane configuration accepted by the driver.
+ *
+ *     The value of this property can be one of the following:
+ *
+ *     "Primary":
+ *         To light up a CRTC, attaching a primary plane is the most likely to
+ *         work if it covers the whole CRTC and doesn't have scaling or
+ *         cropping set up.
+ *
+ *         Drivers may support more features for the primary plane, user-space
+ *         can find out with test-only atomic commits.
+ *
+ *         Some primary planes are implicitly used by the kernel in the legacy
+ *         IOCTLs &DRM_IOCTL_MODE_SETCRTC and &DRM_IOCTL_MODE_PAGE_FLIP.
+ *         Therefore user-space must not mix explicit usage of any primary
+ *         plane (e.g. through an atomic commit) with these legacy IOCTLs.
+ *
+ *     "Cursor":
+ *         To enable this plane, using a framebuffer configured without scaling
+ *         or cropping and with the following properties is the most likely to
+ *         work:
+ *
+ *         - If the driver provides the capabilities &DRM_CAP_CURSOR_WIDTH and
+ *           &DRM_CAP_CURSOR_HEIGHT, create the framebuffer with this size.
+ *           Otherwise, create a framebuffer with the size 64x64.
+ *         - If the driver doesn't support modifiers, create a framebuffer with
+ *           a linear layout. Otherwise, use the IN_FORMATS plane property.
+ *
+ *         Drivers may support more features for the cursor plane, user-space
+ *         can find out with test-only atomic commits.
+ *
+ *         Some cursor planes are implicitly used by the kernel in the legacy
+ *         IOCTLs &DRM_IOCTL_MODE_CURSOR and &DRM_IOCTL_MODE_CURSOR2.
+ *         Therefore user-space must not mix explicit usage of any cursor
+ *         plane (e.g. through an atomic commit) with these legacy IOCTLs.
+ *
+ *         Some drivers may support cursors even if no cursor plane is exposed.
+ *         In this case, the legacy cursor IOCTLs can be used to configure the
+ *         cursor.
+ *
+ *     "Overlay":
+ *         Neither primary nor cursor.
+ *
+ *         Overlay planes are the only planes exposed when the
+ *         &DRM_CLIENT_CAP_UNIVERSAL_PLANES capability is disabled.
+ *
  * IN_FORMATS:
  *     Blob property which contains the set of buffer format and modifier
  *     pairs supported by this plane. The blob is a struct
@@ -719,12 +769,8 @@ static int __setplane_check(struct drm_plane *plane,
 	ret = drm_plane_check_pixel_format(plane, fb->format->format,
 					   fb->modifier);
 	if (ret) {
-		struct drm_format_name_buf format_name;
-
-		DRM_DEBUG_KMS("Invalid pixel format %s, modifier 0x%llx\n",
-			      drm_get_format_name(fb->format->format,
-						  &format_name),
-			      fb->modifier);
+		DRM_DEBUG_KMS("Invalid pixel format %p4cc, modifier 0x%llx\n",
+			      &fb->format->format, fb->modifier);
 		return ret;
 	}