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inxi-graphics updates, added debugger for switcherooctl
This commit is contained in:
Harald Hope
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commit
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2 changed files with 185 additions and 0 deletions
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@ -71,6 +71,7 @@ MONITOR DATA
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wayland_data()
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GRAPHICS HARDWARE
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CARD RAM
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DISPLAY CLASS
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================================================================================
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DISPLAY API
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@ -3993,6 +3994,189 @@ ip/hd-display-transmitter-controller
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/usr/lib/xorg-server/Xorg.wrap: Only console users are allowed to run the X server
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https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=863891
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========================================
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DISPLAY CLASS
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----------------------------------------
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Resource:
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https://www.dmtf.org/sites/default/files/standards/documents/DSP1075_1.0.0.pdf
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https://ics.uci.edu/~harris/ics216/pci/PCI_22.pdf
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https://stackoverflow.com/questions/41658094/what-is-the-difference-between-
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display-controller-and-vga-compatible-controller
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"* VGA compatible controller, Intel integrated GPU: Controls the display monitor &
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the HDMI port.
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* Display controller AMD discrete GPU: This PCI connected device can be used to
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render specific things, like games, or some other apps. This is known as
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"Hardware Acceleration" with GPU. This probably cannot drive the monitor
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display, I guess because no such physical connections exist from it which can
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control the display / HDMI. Desktop GPUs have their on video output ports."
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The primary PCI class is: 03h: Display Controller.
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There are 4 classes. It is not easy to understand or find docs on what these
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really are.
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----------------------------------------
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MUXED/MUXLESS - ports, no port for renderer
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----------------------------------------
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----------------------------------------
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https://www.kernel.org/doc/html/v4.20/gpu/vga-switcheroo.html
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vga_switcheroo is the Linux subsystem for laptop hybrid graphics. These come in
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two flavors:
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muxed: Dual GPUs with a multiplexer chip to switch outputs between GPUs.
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muxless: Dual GPUs but only one of them is connected to outputs. The other one
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is merely used to offload rendering, its results are copied over PCIe into the
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framebuffer. On Linux this is supported with DRI PRIME. Hybrid graphics started
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to appear in the late Naughties and were initially all muxed. Newer laptops
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moved to a muxless architecture for cost reasons. A notable exception is the
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MacBook Pro which continues to use a mux. Muxes come with varying capabilities:
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Some switch only the panel, others can also switch external displays. Some
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switch all display pins at once while others can switch just the DDC lines. (To
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allow EDID probing for the inactive GPU.) Also, muxes are often used to cut
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power to the discrete GPU while it is not used.
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/sys/kernel/debug/vgaswitcheroo/switch
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Values:
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* OFF: Power off the device not in use.
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* ON: Power on the device not in use.
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* IGD: Switch to the integrated graphics device. Power on the integrated GPU if
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necessary, power off the discrete GPU. Prerequisite is that no user space
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processes (e.g. Xorg, alsactl) have opened device files of the GPUs or the audio
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client. If the switch fails, the user may invoke lsof(8) or fuser(1) on
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/dev/dri/ and /dev/snd/controlC1 to identify processes blocking the switch.
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* DIS: Switch to the discrete graphics device.
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* DIGD: Delayed switch to the integrated graphics device. This will perform the
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switch once the last user space process has closed the device files of the GPUs
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and the audio client.
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* DDIS: Delayed switch to the discrete graphics device.
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* MIGD: Mux-only switch to the integrated graphics device. Does not remap
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console or change the power state of either gpu. If the integrated GPU is
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currently off, the screen will turn black. If it is on, the screen will show
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whatever happens to be in VRAM. Either way, the user has to blindly enter the
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command to switch back.
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* MDIS: Mux-only switch to the discrete graphics device.
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----------------------------------------
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Mrmazda found this in his systems, two, 1 with discrete nvidia, both with intel
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igpu:
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# pinxi -Gaz --vs --zl --hostname
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pinxi 3.3.28-18 (2023-08-08)
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Graphics:
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Device-1: Intel 82865G Integrated Graphics vendor: Dell driver: i915
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v: kernel arch: Gen-2 process: Intel 130nm built: 2002-03 ports:
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active: none empty: VGA-2 bus-ID: 00:02.0 chip-ID: 8086:2572
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class-ID: 0380
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Device-2: NVIDIA NV5 [Riva TNT2 Model 64 / Pro] driver: nouveau v: kernel
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non-free: series: 71.86.xx status: legacy (EOL) last: release: 71.86.15
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kernel: 2.6.38 xorg: 1.7 arch: Fahrenheit code: NVx
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process: TSMC 220-350nm built: 1998-2000 ports: active: VGA-1 empty: none
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bus-ID: 01:08.0 chip-ID: 10de:002d class-ID: 0300
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# pinxi -Gaz --vs --zl --hostname
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pinxi 3.3.30-07 (2023-10-18)
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Graphics:
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Device-1: Intel 82865G Integrated Graphics vendor: Dell driver: i915
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v: kernel arch: Gen-2 process: Intel 130nm built: 2002-03 ports:
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active: VGA-1 empty: none bus-ID: 00:02.0 chip-ID: 8086:2572
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class-ID: 0300
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They're originally twin Dell GX270 PCs, but one remains Intel onboard only,
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while the other has added an AGP NV. The Intel's ID is 380 when coupled with NV
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card. Both above are from booting Tumbleweed, but pinxi run a year ago. Now in
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TW and in Debian, the onboard doesn't show in pinxi when the NV is present:
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# pinxi -Gaz --vs --zl --hostname # Bullseye
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pinxi 3.3.34-04 (2024-05-06)
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Graphics:
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Device-1: NVIDIA NV34 [GeForce FX 5200] driver: nouveau v: kernel non-free:
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series: 173.14.xx status: legacy (EOL~2013-12-xx) last: release: 173.14.39
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kernel: 3.12 xorg: 1.15 arch: Rankine code: NV3x process: 130-150nm
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built: 2003-2005 ports: active: DVI-I-1,VGA-1 empty: TV-1 bus-ID: 01:00.0
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chip-ID: 10de:0322 class-ID: 0300
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Display: x11 server: X.Org v: 1.20.11 compositor: Twin v: 3.0 driver: X:
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# pinxi -Ga --vs
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pinxi 3.3.35-02 (2024-08-03)
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Graphics:
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Device-1: NVIDIA NV34 [GeForce FX 5200] driver: nouveau v: kernel non-free:
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series: 173.14.xx status: legacy (EOL~2013-12-xx) last: release: 173.14.39
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kernel: 3.12 xorg: 1.15 arch: Rankine code: NV3x process: 130-150nm
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built: 2003-2005 ports: active: DVI-I-1,VGA-1 empty: TV-1 bus-ID: 01:00.0
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chip-ID: 10de:0322 class-ID: 0300
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Display: x11 server: X.Org v: 21.1.12 compositor: kwin driver: X:
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----------------------------------------
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0300: VGA Compatible Controller
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----------------------------------------
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This is what most normal video cards show as. It has nothing to do with VGA
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ports phyically, I believe HDMI, DisplayPort, etc, without VGA ports, will show
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as this class. This is basically the default.
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Unknown if machine learning gpus show as this, but I suspect they do.
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----------------------------------------
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0301: XGA Controller
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----------------------------------------
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https://en.wikipedia.org/wiki/Extended_Graphics_Array#:~:text=The%20eXtended%
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20Graphics%20Array%20(usually,successor%20to%20the%208514%2FA.
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The eXtended Graphics Array (usually called XGA) is a graphics card manufactured
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by IBM and introduced for the IBM PS/2 line of personal computers in 1990 as a
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successor to the 8514/A.
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Have not seen one of these in the wild, but it is probably an enhanced version
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of VGA controllers. Probably obsolete?
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----------------------------------------
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0302: 3D Controller
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----------------------------------------
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So far seen only in Intel + Nvidia Optimus laptops. Assumption is the Nvidia
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gpu does not have a discreet port, but runs through the Intel, but that's not
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a fact, just a guess.
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https://lore.kernel.org/lkml/c2cdc3ca-20de-0133-b198-1118fcea7902@loongson.cn/
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Sub-Class 02h is for controllers that have hardware support for 3D
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operations and are not VGA compatible.
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----------------------------------------
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0380: Other Display Controller
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----------------------------------------
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https://www.reddit.com/r/Amd/comments/12pmc67/
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amd_dgpu_igpu_any_benefits_or_features/
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This is a catchall bucket. On laptops with amd igpu and dgpu, integrated and
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discrete, that is, an APU and a standalone, that thread suggests that those
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machines have a port for each controller.
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Seen igpu and second as 0380 so it's not clear what it means.
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https://lore.kernel.org/lkml/20230613030151.216625-3-15330273260@189.cn/
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https://lore.kernel.org/lkml/f08b6a76-6c90-b59b-ff43-c779ef759d09@loongson.cn/
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>>> For an example, nvidia render only GPU typically has 0x0380.
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>> PCI_CLASS_DISPLAY_3D and PCI_CLASS_DISPLAY_OTHER are used to annotate
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>> the render-only GPU.
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>> Nowadays, the 'VGA devices' here is stand for the Graphics card
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>>
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>> which is capable of display something on the screen.
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----------------------------------------
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----------------------------------------
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================================================================================
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--------------------------------------------------------------------------------
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1
pinxi
1
pinxi
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@ -2018,6 +2018,7 @@ sub display_data {
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['swaymsg','-t get_tree'],
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['swaymsg','-t get_workspaces -p'],
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['swaymsg','-t get_workspaces -r'],
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['switcherooctl','list'],
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['twin','--version'], # TDE
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['vainfo',''],
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['vdpauinfo',''],
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