diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-03-13 18:34:05 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-03-13 18:34:05 -0700 |
commit | 480e035fc4c714fb5536e64ab9db04fedc89e910 (patch) | |
tree | 01341ee43abe7ecb8efb4e7bbbb1c3b3b50f7ec8 /Documentation/gpu/amdgpu/display | |
parent | e5e038b7ae9da96b93974bf072ca1876899a01a3 (diff) | |
parent | 119b225f01e4d3ce974cd3b4d982c76a380c796d (diff) | |
download | linux-480e035fc4c714fb5536e64ab9db04fedc89e910.tar.gz linux-480e035fc4c714fb5536e64ab9db04fedc89e910.tar.bz2 linux-480e035fc4c714fb5536e64ab9db04fedc89e910.zip |
Merge tag 'drm-next-2024-03-13' of https://gitlab.freedesktop.org/drm/kernel
Pull drm updates from Dave Airlie:
"Highlights are usual, more AMD IP blocks for future hw, i915/xe
changes, Displayport tunnelling support for i915, msm YUV over DP
changes, new tests for ttm, but its mostly a lot of stuff all over the
place from lots of people.
core:
- EDID cleanups
- scheduler error handling fixes
- managed: add drmm_release_action() with tests
- add ratelimited drm debug print
- DPCD PSR early transport macro
- DP tunneling and bandwidth allocation helpers
- remove built-in edids
- dp: Avoid AUX transfers on powered-down displays
- dp: Add VSC SDP helpers
cross drivers:
- use new drm print helpers
- switch to ->read_edid callback
- gem: add stats for shared buffers plus updates to amdgpu, i915, xe
syncobj:
- fixes to waiting and sleeping
ttm:
- add tests
- fix errno codes
- simply busy-placement handling
- fix page decryption
media:
- tc358743: fix v4l device registration
video:
- move all kernel parameters for video behind CONFIG_VIDEO
sound:
- remove <drm/drm_edid.h> include from header
ci:
- add tests for msm
- fix apq8016 runner
efifb:
- use copy of global screen_info state
vesafb:
- use copy of global screen_info state
simplefb:
- fix logging
bridge:
- ite-6505: fix DP link-training bug
- samsung-dsim: fix error checking in probe
- samsung-dsim: add bsh-smm-s2/pro boards
- tc358767: fix regmap usage
- imx: add i.MX8MP HDMI PVI plus DT bindings
- imx: add i.MX8MP HDMI TX plus DT bindings
- sii902x: fix probing and unregistration
- tc358767: limit pixel PLL input range
- switch to new drm_bridge_read_edid() interface
panel:
- ltk050h3146w: error-handling fixes
- panel-edp: support delay between power-on and enable; use put_sync
in unprepare; support Mediatek MT8173 Chromebooks, BOE NV116WHM-N49
V8.0, BOE NV122WUM-N41, CSO MNC207QS1-1 plus DT bindings
- panel-lvds: support EDT ETML0700Z9NDHA plus DT bindings
- panel-novatek: FRIDA FRD400B25025-A-CTK plus DT bindings
- add BOE TH101MB31IG002-28A plus DT bindings
- add EDT ETML1010G3DRA plus DT bindings
- add Novatek NT36672E LCD DSI plus DT bindings
- nt36523: support 120Hz timings, fix includes
- simple: fix display timings on RK32FN48H
- visionox-vtdr6130: fix initialization
- add Powkiddy RGB10MAX3 plus DT bindings
- st7703: support panel rotation plus DT bindings
- add Himax HX83112A plus DT bindings
- ltk500hd1829: add support for ltk101b4029w and admatec 9904370
- simple: add BOE BP082WX1-100 8.2" panel plus DT bindungs
panel-orientation-quirks:
- GPD Win Mini
amdgpu:
- Validate DMABuf imports in compute VMs
- Add RAS ACA framework
- PSP 13 fixes
- Misc code cleanups
- Replay fixes
- Atom interpretor PS, WS bounds checking
- DML2 fixes
- Audio fixes
- DCN 3.5 Z state fixes
- Remove deprecated ida_simple usage
- UBSAN fixes
- RAS fixes
- Enable seq64 infrastructure
- DC color block enablement
- Documentation updates
- DC documentation updates
- DMCUB updates
- ATHUB 4.1 support
- LSDMA 7.0 support
- JPEG DPG support
- IH 7.0 support
- HDP 7.0 support
- VCN 5.0 support
- SMU 13.0.6 updates
- NBIO 7.11 updates
- SDMA 6.1 updates
- MMHUB 3.3 updates
- DCN 3.5.1 support
- NBIF 6.3.1 support
- VPE 6.1.1 support
amdkfd:
- Validate DMABuf imports in compute VMs
- SVM fixes
- Trap handler updates and enhancements
- Fix cache size reporting
- Relocate the trap handler
radeon:
- Atom interpretor PS, WS bounds checking
- Misc code cleanups
xe:
- new query for GuC submission version
- Remove unused persistent exec_queues
- Add vram frequency sysfs attributes
- Add the flag XE_VM_BIND_FLAG_DUMPABLE
- Drop pre-production workarounds
- Drop kunit tests for unsupported platforms
- Start pumbling SR-IOV support with memory based interrupts for VF
- Allow to map BO in GGTT with PAT index corresponding to XE_CACHE_UC
to work with memory based interrupts
- Add GuC Doorbells Manager as prep work SR-IOV
- Implement additional workarounds for xe2 and MTL
- Program a few registers according to perfomance guide spec for Xe2
- Fix remaining 32b build issues and enable it back
- Fix build with CONFIG_DEBUG_FS=n
- Fix warnings from GuC ABI headers
- Introduce Relay Communication for SR-IOV for VF <-> GuC <-> PF
- Release mmap mappings on rpm suspend
- Disable mid-thread preemption when not properly supported by
hardware
- Fix xe_exec by reserving extra fence slot for CPU bind
- Fix xe_exec with full long running exec queue
- Canonicalize addresses where needed for Xe2 and add to devcoredum
- Toggle USM support for Xe2
- Only allow 1 ufence per exec / bind IOCTL
- Add GuC firmware loading for Lunar Lake
- Add XE_VMA_PTE_64K VMA flag
i915:
- Add more ADL-N PCI IDs
- Enable fastboot also on older platforms
- Early transport for panel replay and PSR
- New ARL PCI IDs
- DP TPS4 PHY test pattern support
- Unify and improve VSC SDP for PSR and non-PSR cases
- Refactor memory regions and improve debug logging
- Rework global state serialization
- Remove unused CDCLK divider fields
- Unify HDCP connector logging format
- Use display instead of graphics version in display code
- Move VBT and opregion debugfs next to the implementation
- Abstract opregion interface, use opaque type
- MTL fixes
- HPD handling fixes
- Add GuC submission interface version query
- Atomically invalidate userptr on mmu-notifier
- Update handling of MMIO triggered reports
- Don't make assumptions about intel_wakeref_t type
- Extend driver code of Xe_LPG to Xe_LPG+
- Add flex arrays to struct i915_syncmap
- Allow for very slow HuC loading
- DP tunneling and bandwidth allocation support
msm:
- Correct bindings for MSM8976 and SM8650 platforms
- Start migration of MDP5 platforms to DPU driver
- X1E80100 MDSS support
- DPU:
- Improve DSC allocation, fixing several important corner cases
- Add support for SDM630/SDM660 platforms
- Simplify dpu_encoder_phys_ops
- Apply fixes targeting DSC support with a single DSC encoder
- Apply fixes for HCTL_EN timing configuration
- X1E80100 support
- Add support for YUV420 over DP
- GPU:
- fix sc7180 UBWC config
- fix a7xx LLC config
- new gpu support: a305B, a750, a702
- machine support: SM7150 (different power levels than other a618)
- a7xx devcoredump support
habanalabs:
- configure IRQ affinity according to NUMA node
- move HBM MMU page tables inside the HBM
- improve device reset
- check extended PCIe errors
ivpu:
- updates to firmware API
- refactor BO allocation
imx:
- use devm_ functions during init
hisilicon:
- fix EDID includes
mgag200:
- improve ioremap usage
- convert to struct drm_edid
- Work around PCI write bursts
nouveau:
- disp: use kmemdup()
- fix EDID includes
- documentation fixes
qaic:
- fixes to BO handling
- make use of DRM managed release
- fix order of remove operations
rockchip:
- analogix_dp: get encoder port from DT
- inno_hdmi: support HDMI for RK3128
- lvds: error-handling fixes
ssd130x:
- support SSD133x plus DT bindings
tegra:
- fix error handling
tilcdc:
- make use of DRM managed release
v3d:
- show memory stats in debugfs
- Support display MMU page size
vc4:
- fix error handling in plane prepare_fb
- fix framebuffer test in plane helpers
virtio:
- add venus capset defines
vkms:
- fix OOB access when programming the LUT
- Kconfig improvements
vmwgfx:
- unmap surface before changing plane state
- fix memory leak in error handling
- documentation fixes
- list command SVGA_3D_CMD_DEFINE_GB_SURFACE_V4 as invalid
- fix null-pointer deref in execbuf
- refactor display-mode probing
- fix fencing for creating cursor MOBs
- fix cursor-memory lifetime
xlnx:
- fix live video input for ZynqMP DPSUB
lima:
- fix memory leak
loongson:
- fail if no VRAM present
meson:
- switch to new drm_bridge_read_edid() interface
renesas:
- add RZ/G2L DU support plus DT bindings
mxsfb:
- Use managed mode config
sun4i:
- HDMI: updates to atomic mode setting
mediatek:
- Add display driver for MT8188 VDOSYS1
- DSI driver cleanups
- Filter modes according to hardware capability
- Fix a null pointer crash in mtk_drm_crtc_finish_page_flip
etnaviv:
- enhancements for NPU and MRT support"
* tag 'drm-next-2024-03-13' of https://gitlab.freedesktop.org/drm/kernel: (1420 commits)
drm/amd/display: Removed redundant @ symbol to fix kernel-doc warnings in -next repo
drm/amd/pm: wait for completion of the EnableGfxImu message
drm/amdgpu/soc21: add mode2 asic reset for SMU IP v14.0.1
drm/amdgpu: add smu 14.0.1 support
drm/amdgpu: add VPE 6.1.1 discovery support
drm/amdgpu/vpe: add VPE 6.1.1 support
drm/amdgpu/vpe: don't emit cond exec command under collaborate mode
drm/amdgpu/vpe: add collaborate mode support for VPE
drm/amdgpu/vpe: add PRED_EXE and COLLAB_SYNC OPCODE
drm/amdgpu/vpe: add multi instance VPE support
drm/amdgpu/discovery: add nbif v6_3_1 ip block
drm/amdgpu: Add nbif v6_3_1 ip block support
drm/amdgpu: Add pcie v6_1_0 ip headers (v5)
drm/amdgpu: Add nbif v6_3_1 ip headers (v5)
arch/powerpc: Remove <linux/fb.h> from backlight code
macintosh/via-pmu-backlight: Include <linux/backlight.h>
fbdev/chipsfb: Include <linux/backlight.h>
drm/etnaviv: Restore some id values
drm/amdkfd: make kfd_class constant
drm/amdgpu: add ring timeout information in devcoredump
...
Diffstat (limited to 'Documentation/gpu/amdgpu/display')
-rw-r--r-- | Documentation/gpu/amdgpu/display/dcn-blocks.rst | 78 | ||||
-rw-r--r-- | Documentation/gpu/amdgpu/display/display-contributing.rst | 168 | ||||
-rw-r--r-- | Documentation/gpu/amdgpu/display/display-manager.rst | 3 | ||||
-rw-r--r-- | Documentation/gpu/amdgpu/display/index.rst | 78 |
4 files changed, 317 insertions, 10 deletions
diff --git a/Documentation/gpu/amdgpu/display/dcn-blocks.rst b/Documentation/gpu/amdgpu/display/dcn-blocks.rst new file mode 100644 index 000000000000..a3fbd3ea028b --- /dev/null +++ b/Documentation/gpu/amdgpu/display/dcn-blocks.rst @@ -0,0 +1,78 @@ +========== +DCN Blocks +========== + +In this section, you will find some extra details about some of the DCN blocks +and the code documentation when it is automatically generated. + +DCHUBBUB +-------- + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h + :doc: overview + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h + :export: + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h + :internal: + +HUBP +---- + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h + :doc: overview + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h + :export: + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h + :internal: + +DPP +--- + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h + :doc: overview + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h + :export: + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h + :internal: + +MPC +--- + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h + :doc: overview + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h + :export: + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h + :internal: + +OPP +--- + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/opp.h + :doc: overview + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/opp.h + :export: + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/opp.h + :internal: + +DIO +--- + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h + :doc: overview + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h + :export: + +.. kernel-doc:: drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h + :internal: diff --git a/Documentation/gpu/amdgpu/display/display-contributing.rst b/Documentation/gpu/amdgpu/display/display-contributing.rst new file mode 100644 index 000000000000..fdb2bea01d53 --- /dev/null +++ b/Documentation/gpu/amdgpu/display/display-contributing.rst @@ -0,0 +1,168 @@ +.. _display_todos: + +============================== +AMDGPU - Display Contributions +============================== + +First of all, if you are here, you probably want to give some technical +contribution to the display code, and for that, we say thank you :) + +This page summarizes some of the issues you can help with; keep in mind that +this is a static page, and it is always a good idea to try to reach developers +in the amdgfx or some of the maintainers. Finally, this page follows the DRM +way of creating a TODO list; for more information, check +'Documentation/gpu/todo.rst'. + +Gitlab issues +============= + +Users can report issues associated with AMD GPUs at: + +- https://gitlab.freedesktop.org/drm/amd + +Usually, we try to add a proper label to all new tickets to make it easy to +filter issues. If you can reproduce any problem, you could help by adding more +information or fixing the issue. + +Level: diverse + +IGT +=== + +`IGT`_ provides many integration tests that can be run on your GPU. We always +want to pass a large set of tests to increase the test coverage in our CI. If +you wish to contribute to the display code but are unsure where a good place +is, we recommend you run all IGT tests and try to fix any failure you see in +your hardware. Keep in mind that this failure can be an IGT problem or a kernel +issue; it is necessary to analyze case-by-case. + +Level: diverse + +.. _IGT: https://gitlab.freedesktop.org/drm/igt-gpu-tools + +Compilation +=========== + +Fix compilation warnings +------------------------ + +Enable the W1 or W2 warning level in the kernel compilation and try to fix the +issues on the display side. + +Level: Starter + +Fix compilation issues when using um architecture +------------------------------------------------- + +Linux has a User-mode Linux (UML) feature, and the kernel can be compiled to +the **um** architecture. Compiling for **um** can bring multiple advantages +from the test perspective. We currently have some compilation issues in this +area that we need to fix. + +Level: Intermediate + +Code Refactor +============= + +Add prefix to DC functions to improve the debug with ftrace +----------------------------------------------------------- + +The Ftrace debug feature (check 'Documentation/trace/ftrace.rst') is a +fantastic way to check the code path when developers try to make sense of a +bug. Ftrace provides a filter mechanism that can be useful when the developer +has some hunch of which part of the code can cause the issue; for this reason, +if a set of functions has a proper prefix, it becomes easy to create a good +filter. Additionally, prefixes can improve stack trace readability. + +The DC code does not follow some prefix rules, which makes the Ftrace filter +more complicated and reduces the readability of the stack trace. If you want +something simple to start contributing to the display, you can make patches for +adding prefixes to DC functions. To create those prefixes, use part of the file +name as a prefix for all functions in the target file. Check the +'amdgpu_dm_crtc.c` and `amdgpu_dm_plane.c` for some references. However, we +strongly advise not to send huge patches changing these prefixes; otherwise, it +will be hard to review and test, which can generate second thoughts from +maintainers. Try small steps; in case of double, you can ask before you put in +effort. We recommend first looking at folders like dceXYZ, dcnXYZ, basics, +bios, core, clk_mgr, hwss, resource, and irq. + +Level: Starter + +Reduce code duplication +----------------------- + +AMD has an extensive portfolio with various dGPUs and APUs that amdgpu +supports. To maintain the new hardware release cadence, DCE/DCN was designed in +a modular design, making the bring-up for new hardware fast. Over the years, +amdgpu accumulated some technical debt in the code duplication area. For this +task, it would be a good idea to find a tool that can discover code duplication +(including patterns) and use it as guidance to reduce duplications. + +Level: Intermediate + +Make atomic_commit_[check|tail] more readable +--------------------------------------------- + +The functions responsible for atomic commit and tail are intricate and +extensive. In particular `amdgpu_dm_atomic_commit_tail` is a long function and +could benefit from being split into smaller helpers. Improvements in this area +are more than welcome, but keep in mind that changes in this area will affect +all ASICs, meaning that refactoring requires a comprehensive verification; in +other words, this effort can take some time for validation. + +Level: Advanced + +Documentation +============= + +Expand kernel-doc +----------------- + +Many DC functions do not have a proper kernel-doc; understanding a function and +adding documentation is a great way to learn more about the amdgpu driver and +also leave an outstanding contribution to the entire community. + +Level: Starter + +Beyond AMDGPU +============= + +AMDGPU provides features that are not yet enabled in the userspace. This +section highlights some of the coolest display features, which could be enabled +with the userspace developer helper. + +Enable underlay +--------------- + +AMD display has this feature called underlay (which you can read more about at +'Documentation/GPU/amdgpu/display/mpo-overview.rst') which is intended to +save power when playing a video. The basic idea is to put a video in the +underlay plane at the bottom and the desktop in the plane above it with a hole +in the video area. This feature is enabled in ChromeOS, and from our data +measurement, it can save power. + +Level: Unknown + +Adaptive Backlight Modulation (ABM) +----------------------------------- + +ABM is a feature that adjusts the display panel's backlight level and pixel +values depending on the displayed image. This power-saving feature can be very +useful when the system starts to run off battery; since this will impact the +display output fidelity, it would be good if this option was something that +users could turn on or off. + +Level: Unknown + + +HDR & Color management & VRR +---------------------------- + +HDR, Color Management, and VRR are huge topics and it's hard to put these into +concise ToDos. If you are interested in this topic, we recommend checking some +blog posts from the community developers to better understand some of the +specific challenges and people working on the subject. If anyone wants to work +on some particular part, we can try to help with some basic guidance. Finally, +keep in mind that we already have some kernel-doc in place for those areas. + +Level: Unknown diff --git a/Documentation/gpu/amdgpu/display/display-manager.rst b/Documentation/gpu/amdgpu/display/display-manager.rst index be2651ecdd7f..67a811e6891f 100644 --- a/Documentation/gpu/amdgpu/display/display-manager.rst +++ b/Documentation/gpu/amdgpu/display/display-manager.rst @@ -132,9 +132,6 @@ The DRM blend mode and its elements are then mapped by AMDGPU display manager (MPC), as follows: .. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h - :doc: mpc-overview - -.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h :functions: mpcc_blnd_cfg Therefore, the blending configuration for a single MPCC instance on the MPC diff --git a/Documentation/gpu/amdgpu/display/index.rst b/Documentation/gpu/amdgpu/display/index.rst index f8a4f53d70d8..f0c342e00a39 100644 --- a/Documentation/gpu/amdgpu/display/index.rst +++ b/Documentation/gpu/amdgpu/display/index.rst @@ -7,18 +7,80 @@ drm/amd/display - Display Core (DC) AMD display engine is partially shared with other operating systems; for this reason, our Display Core Driver is divided into two pieces: -1. **Display Core (DC)** contains the OS-agnostic components. Things like +#. **Display Core (DC)** contains the OS-agnostic components. Things like hardware programming and resource management are handled here. -2. **Display Manager (DM)** contains the OS-dependent components. Hooks to the - amdgpu base driver and DRM are implemented here. +#. **Display Manager (DM)** contains the OS-dependent components. Hooks to the + amdgpu base driver and DRM are implemented here. For example, you can check + display/amdgpu_dm/ folder. + +------------------ +DC Code validation +------------------ + +Maintaining the same code base across multiple OSes requires a lot of +synchronization effort between repositories and exhaustive validation. In the +DC case, we maintain a tree to centralize code from different parts. The shared +repository has integration tests with our Internal Linux CI farm, and we run a +comprehensive set of IGT tests in various AMD GPUs/APUs (mostly recent dGPUs +and APUs). Our CI also checks ARM64/32, PPC64/32, and x86_64/32 compilation +with DCN enabled and disabled. + +When we upstream a new feature or some patches, we pack them in a patchset with +the prefix **DC Patches for <DATE>**, which is created based on the latest +`amd-staging-drm-next <https://gitlab.freedesktop.org/agd5f/linux>`_. All of +those patches are under a DC version tested as follows: + +* Ensure that every patch compiles and the entire series pass our set of IGT + test in different hardware. +* Prepare a branch with those patches for our validation team. If there is an + error, a developer will debug as fast as possible; usually, a simple bisect + in the series is enough to point to a bad change, and two possible actions + emerge: fix the issue or drop the patch. If it is not an easy fix, the bad + patch is dropped. +* Finally, developers wait a few days for community feedback before we merge + the series. + +It is good to stress that the test phase is something that we take extremely +seriously, and we never merge anything that fails our validation. Follows an +overview of our test set: + +#. Manual test + * Multiple Hotplugs with DP and HDMI. + * Stress test with multiple display configuration changes via the user interface. + * Validate VRR behaviour. + * Check PSR. + * Validate MPO when playing video. + * Test more than two displays connected at the same time. + * Check suspend/resume. + * Validate FPO. + * Check MST. +#. Automated test + * IGT tests in a farm with GPUs and APUs that support DCN and DCE. + * Compilation validation with the latest GCC and Clang from LTS distro. + * Cross-compilation for PowerPC 64/32, ARM 64/32, and x86 32. + +In terms of test setup for CI and manual tests, we usually use: + +#. The latest Ubuntu LTS. +#. In terms of userspace, we only use fully updated open-source components + provided by the distribution official package manager. +#. Regarding IGT, we use the latest code from the upstream. +#. Most of the manual tests are conducted in the GNome but we also use KDE. + +Notice that someone from our test team will always reply to the cover letter +with the test report. + +-------------- +DC Information +-------------- The display pipe is responsible for "scanning out" a rendered frame from the GPU memory (also called VRAM, FrameBuffer, etc.) to a display. In other words, it would: -1. Read frame information from memory; -2. Perform required transformation; -3. Send pixel data to sink devices. +#. Read frame information from memory; +#. Perform required transformation; +#. Send pixel data to sink devices. If you want to learn more about our driver details, take a look at the below table of content: @@ -26,7 +88,9 @@ table of content: .. toctree:: display-manager.rst - dc-debug.rst dcn-overview.rst + dcn-blocks.rst mpo-overview.rst + dc-debug.rst + display-contributing.rst dc-glossary.rst |