Merge tag 'drm-misc-next-2021-07-16' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for v5.15:

UAPI Changes:

Cross-subsystem Changes:
- udmabuf: Add support for mapping hugepages
- Add dma-buf stats to sysfs.
- Assorted fixes to fbdev/omap2.
- dma-buf: Document DMA_BUF_IOCTL_SYNC
- Improve dma-buf non-dynamic exporter expectations better.
- Add module parameters for dma-buf size and list limit.
- Add HDMI codec support to vc4, to replace vc4's own codec.
- Document dma-buf implicit fencing rules.
- dma_resv_test_signaled test_all handling.

Core Changes:
- Extract i915's eDP backlight code into DRM helpers.
- Assorted docbook updates.
- Rework drm_dp_aux documentation.
- Add support for the DP aux bus.
- Shrink dma-fence-chain slightly.
- Add alloc/free helpers for dma-fence-chain.
- Assorted fixes to TTM., drm/of, bridge
- drm_gem_plane_helper_prepare/cleanup_fb is now the default for gem drivers.
- Small fix for scheduler completion.
- Remove use of drm_device.irq_enabled.
- Print the driver name to dmesg when registering framebuffer.
- Export drm/gem's shadow plane handling, and use it in vkms.
- Assorted small fixes.

Driver Changes:
- Add eDP backlight to nouveau.
- Assorted fixes and cleanups to nouveau, panfrost, vmwgfx, anx7625,
  amdgpu, gma500, radeon, mgag200, vgem, vc4, vkms, omapdrm.
- Add support for Samsung DB7430, Samsung ATNA33XC20, EDT ETMV570G2DHU,
  EDT ETM0350G0DH6, Innolux EJ030NA panels.
- Fix some simple pannels missing bus_format and connector types.
- Add mks-guest-stats instrumentation support to vmwgfx.
- Merge i915-ttm topic branch.
- Make s6e63m0 panel use Mipi-DBI helpers.
- Add detect() supoprt for AST.
- Use interrupts for hotplug on vc4.
- vmwgfx is now moved to drm-misc-next, as sroland is no longer a maintainer for now.
- vmwgfx now uses copies of vmware's internal device headers.
- Slowly convert ti-sn65dsi83 over to atomic.
- Rework amdgpu dma-resv handling.
- Fix virtio fencing for planes.
- Ensure amdgpu can always evict to SYSTEM.
- Many drivers fixed for implicit fencing rules.
- Set default prepare/cleanup fb for tiny, vram and simple helpers too.
- Rework panfrost gpu reset and related serialization.
- Update VKMS todo list.
- Make bochs a tiny gpu driver, and use vram helper.
- Use linux irq interfaces instead of drm_irq in some drivers.
- Add support for Raspberry Pi Pico to GUD.

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

# gpg: Signature made Fri 16 Jul 2021 21:06:04 AEST
# gpg:                using RSA key B97BD6A80CAC4981091AE547FE558C72A67013C3
# gpg: Good signature from "Maarten Lankhorst <maarten.lankhorst@linux.intel.com>" [expired]
# gpg:                 aka "Maarten Lankhorst <maarten@debian.org>" [expired]
# gpg:                 aka "Maarten Lankhorst <maarten.lankhorst@canonical.com>" [expired]
# gpg: Note: This key has expired!
# Primary key fingerprint: B97B D6A8 0CAC 4981 091A  E547 FE55 8C72 A670 13C3
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/444811c3-cbec-e9d5-9a6b-9632eda7962a@linux.intel.com

2 files changed, 39 insertions, 12 deletions

diff --git a/Documentation/gpu/drm-uapi.rst b/Documentation/gpu/drm-uapi.rst
index 04bdc7a91d53..7e51dd40bf6e 100644
--- a/Documentation/gpu/drm-uapi.rst
+++ b/Documentation/gpu/drm-uapi.rst
@@ -457,6 +457,19 @@ Userspace API Structures
 .. kernel-doc:: include/uapi/drm/drm_mode.h
    :doc: overview
 
+.. _crtc_index:
+
+CRTC index
+----------
+
+CRTC's have both an object ID and an index, and they are not the same thing.
+The index is used in cases where a densely packed identifier for a CRTC is
+needed, for instance a bitmask of CRTC's. The member possible_crtcs of struct
+drm_mode_get_plane is an example.
+
+DRM_IOCTL_MODE_GETRESOURCES populates a structure with an array of CRTC ID's,
+and the CRTC index is its position in this array.
+
 .. kernel-doc:: include/uapi/drm/drm.h
    :internal:
 
diff --git a/Documentation/gpu/vkms.rst b/Documentation/gpu/vkms.rst
index 2c9b376da5ca..941f0e7e5eef 100644
--- a/Documentation/gpu/vkms.rst
+++ b/Documentation/gpu/vkms.rst
@@ -98,9 +98,17 @@ with VKMS maintainers.
 IGT better support
 ------------------
 
-- Investigate: (1) test cases on kms_plane that are failing due to timeout on
-  capturing CRC; (2) when running kms_flip test cases in sequence, some
-  successful individual test cases are failing randomly.
+Debugging:
+
+- kms_plane: some test cases are failing due to timeout on capturing CRC;
+
+- kms_flip: when running test cases in sequence, some successful individual
+  test cases are failing randomly; when individually, some successful test
+  cases display in the log the following error::
+
+  [drm:vkms_prepare_fb [vkms]] ERROR vmap failed: -4
+
+Virtual hardware (vblank-less) mode:
 
 - VKMS already has support for vblanks simulated via hrtimers, which can be
   tested with kms_flip test; in some way, we can say that VKMS already mimics
@@ -116,7 +124,17 @@ Add Plane Features
 
 There's lots of plane features we could add support for:
 
-- Real overlay planes, not just cursor.
+- Multiple overlay planes. [Good to get started]
+
+- Clearing primary plane: clear primary plane before plane composition (at the
+  start) for correctness of pixel blend ops. It also guarantees alpha channel
+  is cleared in the target buffer for stable crc. [Good to get started]
+
+- ARGB format on primary plane: blend the primary plane into background with
+  translucent alpha.
+
+- Support when the primary plane isn't exactly matching the output size: blend
+  the primary plane into the black background.
 
 - Full alpha blending on all planes.
 
@@ -129,13 +147,8 @@ There's lots of plane features we could add support for:
   cursor api).
 
 For all of these, we also want to review the igt test coverage and make sure
-all relevant igt testcases work on vkms.
-
-Prime Buffer Sharing
---------------------
-
-- Syzbot report - WARNING in vkms_gem_free_object:
-  https://syzkaller.appspot.com/bug?extid=e7ad70d406e74d8fc9d0
+all relevant igt testcases work on vkms. They are good options for internship
+project.
 
 Runtime Configuration
 ---------------------
@@ -153,7 +166,7 @@ module. Use/Test-cases:
   the refresh rate.
 
 The currently proposed solution is to expose vkms configuration through
-configfs.  All existing module options should be supported through configfs
+configfs. All existing module options should be supported through configfs
 too.
 
 Writeback support
@@ -162,6 +175,7 @@ Writeback support
 - The writeback and CRC capture operations share the use of composer_enabled
   boolean to ensure vblanks. Probably, when these operations work together,
   composer_enabled needs to refcounting the composer state to proper work.
+  [Good to get started]
 
 - Add support for cloned writeback outputs and related test cases using a
   cloned output in the IGT kms_writeback.