Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted

Pull media updates from Mauro Carvalho Chehab:

 - v4l2-core: added ISP statistics support and per-block validation

 - v4l2-core: Allow unknown HDR10 white point and luminance

 - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor

 - New codec: Milos: VPU v2.0 codec support

 - isp driver: gained support for Dreamchip RPPX1 ISP framework

 - vsp1 driver: gained support for RZ/T2H and RZ/N2H

 - Novalake driver: gained CVS support for new NVL hardware

 - dvb-core: fix feed leak on failed DMX_ADD_PID

 - several driver fixes, cleanups and minor improvements

* tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits)
  media: ipu-bridge: check all DMI entries when overriding sensor rotation
  media: v4l2-async: avoid deleting unlinked ASC entry on link error
  media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement
  media: intel/ipu6: fix async notifier cleanup leak on parse error
  media: staging/ipu7: fix async notifier UAF on probe error path
  media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
  media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
  media: rcar-isp: Fix VSPX reference leaks
  media: rcar-isp: Release ISPCORE resources
  media: i2c: imx415: Release runtime PM reference on VBLANK error
  media: i2c: imx415: Return test pattern write errors
  media: renesas: vsp1: Declare index variables in for loop statement
  media: renesas: vsp1: Make reset control optional to support platforms without a reset line
  media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs
  media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs
  media: nxp: imx8-isi: Add additional 32-bit RGB format support
  media: nxp: imx8-isi: Add 16-bit raw Bayer format support
  media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams
  media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks
  media: nxp: imx8-isi: Correct color map between V4L2 and ISI
  ...

2 files changed, 92 insertions, 0 deletions

diff --git a/Documentation/gpu/amdgpu/gc/index.rst b/Documentation/gpu/amdgpu/gc/index.rst
new file mode 100644
index 000000000..b6b583c9d
--- /dev/null
+++ b/Documentation/gpu/amdgpu/gc/index.rst
@@ -0,0 +1,54 @@
+.. _amdgpu-gc:
+
+========================================
+ drm/amdgpu - Graphics and Compute (GC)
+========================================
+
+The relationship between the CPU and GPU can be described as the
+producer-consumer problem, where the CPU fills out a buffer with operations
+(producer) to be executed by the GPU (consumer). The requested operations in
+the buffer are called **Command Packets**, which can be summarized as a
+compressed way of transmitting command information to the graphics controller.
+
+The component that acts as the front end between the CPU and the GPU is called
+**Command Processor (CP)**. This component is responsible for providing greater
+flexibility to the **Graphics and Compute (GC)** since CP makes it possible to
+program various aspects of the GPU pipeline. CP also coordinates the
+communication between the CPU and GPU via a mechanism named **Ring Buffers**,
+where the CPU appends information to the buffer while the GPU removes
+operations. CP is also responsible for handling **Indirect Buffers (IB)**.
+
+For reference, internally the CP consists of several sub-blocks (CPC - CP
+compute, CPG - CP graphics, and CPF - CP fetcher). Some of these acronyms
+appear in register names, but this is more of an implementation detail and not
+something that directly impacts driver programming or debugging.
+
+Graphics (GFX) and Compute Microcontrollers
+-------------------------------------------
+
+GC is a large block, and as a result, it has multiple firmware associated with
+it. Some of them are:
+
+CP (Command Processor)
+    The name for the hardware block that encompasses the front end of the
+    GFX/Compute pipeline. Consists mainly of a bunch of microcontrollers
+    (PFP, ME, CE, MEC). The firmware that runs on these microcontrollers
+    provides the driver interface to interact with the GFX/Compute engine.
+
+    MEC (MicroEngine Compute)
+        This is the microcontroller that controls the compute queues on the
+        GFX/compute engine.
+
+    MES (MicroEngine Scheduler)
+        This is the engine for managing queues. For more details check
+        :ref:`MicroEngine Scheduler (MES) <amdgpu-mes>`.
+
+RLC (RunList Controller)
+    This is another microcontroller in the GFX/Compute engine. It handles
+    power management related functionality within the GFX/Compute engine.
+    The name is a vestige of old hardware where it was originally added
+    and doesn't really have much relation to what the engine does now.
+
+.. toctree::
+
+   mes.rst
diff --git a/Documentation/gpu/amdgpu/gc/mes.rst b/Documentation/gpu/amdgpu/gc/mes.rst
new file mode 100644
index 000000000..b99eb211b
--- /dev/null
+++ b/Documentation/gpu/amdgpu/gc/mes.rst
@@ -0,0 +1,38 @@
+.. _amdgpu-mes:
+
+=============================
+ MicroEngine Scheduler (MES)
+=============================
+
+.. note::
+   Queue and ring buffer are used as a synonymous.
+
+.. note::
+   This section assumes that you are familiar with the concept of Pipes, Queues, and GC.
+   If not, check :ref:`GFX, Compute, and SDMA Overall Behavior<pipes-and-queues-description>`
+   and :ref:`drm/amdgpu - Graphics and Compute (GC) <amdgpu-gc>`.
+
+Every GFX has a pipe component with one or more hardware queues. Pipes can
+switch between queues depending on certain conditions, and one of the
+components that can request a queue switch to a pipe is the MicroEngine
+Scheduler (MES). Whenever the driver is initialized, it creates one MQD per
+hardware queue, and then the MQDs are handed to the MES firmware for mapping
+to:
+
+1. Kernel Queues (legacy): This queue is statically mapped to HQDs and never
+   preempted. Even though this is a legacy feature, it is the current default, and
+   most existing hardware supports it. When an application submits work to the
+   kernel driver, it submits all of the application command buffers to the kernel
+   queues. The CS IOCTL takes the command buffer from the applications and
+   schedules them on the kernel queue.
+
+2. User Queues: These queues are dynamically mapped to the HQDs. Regarding the
+   utilization of User Queues, the userspace application will create its user
+   queues and submit work directly to its user queues with no need to IOCTL for
+   each submission and no need to share a single kernel queue.
+
+In terms of User Queues, MES can dynamically map them to the HQD. If there are
+more MQDs than HQDs, the MES firmware will preempt other user queues to make
+sure each queues get a time slice; in other words, MES is a microcontroller
+that handles the mapping and unmapping of MQDs into HQDs, as well as the
+priorities and oversubscription of MQDs.