Re: [PATCH 6/6] Documentation/gpu: Add DC glossary

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On Mon, Nov 29, 2021 at 3:48 PM <ydirson@xxxxxxx> wrote:
>
> Hi Rodrigo,
>
> That will really be helpful!
>
> I know drawing the line is a difficult problem (and can even make things
> harder when searching), but maybe it would make sense to keep generic
> acronyms not specific to amdgpu in a separate list.  I bet a number of
> them would be useful in the scope of other drm drivers (e.g. CRTC, DCC,
> MST), and some are not restricted to the drm subsystem at all (e.g. FEC,
> LUT), but still have value as not necessarily easy to look up.
>
> Maybe "DC glossary" should just be "Glossary", since quite some entries
> help to read adm/amdgpu/ too.  Which brings me to the result of my recent
> searches as suggested entries:
>
>  KIQ (Kernel Interface Queue), MQD (memory queue descriptor), HQD (hardware
>  queue descriptor), EOP (still no clue :)
>
> Maybe some more specific ones just to be spelled out in clear where they
> are used ?  KCQ (compute queue?), KGQ (gfx queue?)

Kernel Compute Queue and Kernel Graphics Queue.

Alex

>
> More suggestions inlined.
>
> Best regards,
> --
> Yann
>
> > On Thu, Nov 25, 2021 at 10:40 AM Rodrigo Siqueira
> > <Rodrigo.Siqueira@xxxxxxx> wrote:
> > >
> > > In the DC driver, we have multiple acronyms that are not obvious
> > > most of
> > > the time. This commit introduces a DC glossary in order to make it
> > > easier to navigate through our driver.
> > >
> > > Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx>
> > > ---
> > >  Documentation/gpu/amdgpu-dc/amdgpu-dc.rst   |   2 +-
> > >  Documentation/gpu/amdgpu-dc/dc-glossary.rst | 257
> > >  ++++++++++++++++++++
> > >  2 files changed, 258 insertions(+), 1 deletion(-)
> > >  create mode 100644 Documentation/gpu/amdgpu-dc/dc-glossary.rst
> > >
> > > diff --git a/Documentation/gpu/amdgpu-dc/amdgpu-dc.rst
> > > b/Documentation/gpu/amdgpu-dc/amdgpu-dc.rst
> > > index 2e45e83d9a2a..15405c43786a 100644
> > > --- a/Documentation/gpu/amdgpu-dc/amdgpu-dc.rst
> > > +++ b/Documentation/gpu/amdgpu-dc/amdgpu-dc.rst
> > > @@ -26,4 +26,4 @@ table of content:
> > >     amdgpu-dcn-overview.rst
> > >     amdgpu-dm.rst
> > >     amdgpu-dc-debug.rst
> > > -
> > > +   dc-glossary.rst
> > > diff --git a/Documentation/gpu/amdgpu-dc/dc-glossary.rst
> > > b/Documentation/gpu/amdgpu-dc/dc-glossary.rst
> > > new file mode 100644
> > > index 000000000000..48698fc1799f
> > > --- /dev/null
> > > +++ b/Documentation/gpu/amdgpu-dc/dc-glossary.rst
> > > @@ -0,0 +1,257 @@
> > > +===========
> > > +DC Glossary
> > > +===========
> > > +
> > > +.. glossary::
> > > +
> > > +    ABM
> > > +      Adaptive Backlight Modulation
> > > +
> > > +    APU
> > > +      Accelerated Processing Unit
> > > +
> > > +    ASIC
> > > +      Application-Specific Integrated Circuit
> > > +
> > > +    ASSR
> > > +      Alternate Scrambler Seed Reset
> > > +
> > > +    AZ
> > > +      Azalia (HD audio DMA engine)
> > > +
> > > +    BPC
> > > +      Bits Per Colour/Component
> > > +
> > > +    BPP
> > > +      Bits Per Pixel
> > > +
> > > +    Clocks
> > > +      * PCLK: Pixel Clock
> > > +      * SYMCLK: Symbol Clock
> > > +      * SOCCLK: GPU Engine Clock
> > > +      * DISPCLK: Display Clock
> > > +      * DPPCLK: DPP Clock
> > > +      * DCFCLK: Display Controller Fabric Clock
> > > +      * REFCLK: Real Time Reference Clock
> > > +      * PPLL: Pixel PLL
> > > +      * FCLK: Fabric Clock
> > > +      * MCLK: Memory Clock
> > > +      * CPLIB: Content Protection Library
> >
> > CPLIB is not a clock.  It should be split out as its own item.
> >
> > > +
> > > +    CRC
> > > +      Cyclic Redundancy Check
> > > +
> > > +    CRTC
> > > +      Cathode Ray Tube Controller - commonly called "Controller" -
> > > Generates
> > > +      raw stream of pixels, clocked at pixel clock
> > > +
> > > +    CVT
> > > +      Coordinated Video Timings
> > > +
> > > +    DAL
> > > +      Display Abstraction layer
>
> I recall this as the old name for DC, maybe this should be mentioned ?
>
> > > +
> > > +    DC (Software)
> > > +      Display Core
> > > +
> > > +    DC (Hardware)
> > > +      Display Controller
> > > +
> > > +    DCC
> > > +      Delta Colour Compression
> > > +
> > > +    DCE
> > > +      Display Controller Engine
> > > +
> > > +    DCHUB
> > > +      Display Controller Hub
> > > +
> > > +    ARB
> > > +      Arbiter
> > > +
> > > +    VTG
> > > +      Vertical Timing Generator
> > > +
> > > +    DCN
> > > +      Display Core Next
> > > +
> > > +    DCCG
> > > +      Display Clock Generator block
> > > +
> > > +    DDC
> > > +      Display Data Channel
> > > +
> > > +    DFS
> > > +      Digital Frequency Synthesizer
> > > +
> > > +    DIO
> > > +      Display IO
> > > +
> > > +    DPP
> > > +      Display Pipes and Planes
> > > +
> > > +    DSC
> > > +      Display Stream Compression (Reduce the amount of bits to
> > > represent pixel
> > > +      count while at the same pixel clock)
> > > +
> > > +    dGPU
> > > +      discrete GPU
> > > +
> > > +    DMIF
> > > +      Display Memory Interface
> > > +
> > > +    DML
> > > +      Display Mode Library
> > > +
> > > +    DMCU
> > > +      Display Micro Controller Unit
> > > +
> > > +    DMCUB
> > > +      Display Micro-Controller Unit, version B
> >
> > Make Micro Controller vs. Micro-Controller consistent for these.
> >
> > > +
> > > +    DPCD
> > > +      DisplayPort Configuration Data
> > > +
> > > +    DPM(S)
> > > +      Display Power Management (Signaling)
> > > +
> > > +    DRR
> > > +      Dynamic Refresh Rate
> > > +
> > > +    DWB
> > > +      Display writeback
> > > +
> > > +    ECP
> > > +      Enhanced Content Protection
> > > +
> > > +    FB
> > > +      Frame Buffer
> > > +
> > > +    FBC
> > > +      Frame Buffer Compression
> > > +
> > > +    FEC
> > > +      Forward Error Correction
> > > +
> > > +    FRL
> > > +      Fixed Rate Link
> > > +
> > > +    GCO
> > > +      Graphical Controller Object
> > > +
> > > +    GMC
> > > +      Graphic Memory Controller
> > > +
> > > +    GSL
> > > +      Global Swap Lock
> > > +
> > > +    iGPU
> > > +      integrated GPU
> > > +
> > > +    IH
> > > +      Interrupt Handler
> > > +
> > > +    ISR
> > > +      Interrupt Service Request
> > > +
> > > +    ISV
> > > +      Independent Software Vendor
> > > +
> > > +    KMD
> > > +      Kernel Mode Driver
> > > +
> > > +    LB
> > > +      Line Buffer
> > > +
> > > +    LFC
> > > +      Low Framerate Compensation
> > > +
> > > +    LTTPR
> > > +      Link Training Tunable Phy Repeater
> > > +
> > > +    LUT
> > > +      Lookup Table
> > > +
> > > +    MALL
> > > +      Memory Access at Last Level
> > > +
> > > +    MC
> > > +      Memory Controller
> > > +
> > > +    MPC
> > > +      Multiple pipes and plane combine
> > > +
> > > +    MPO
> > > +      Multi Plane Overlay
> > > +
> > > +    MST
> > > +      Multi Stream Transport
> > > +
> > > +    NBP State
> > > +      Northbridge Power State
> > > +
> > > +    NBIO
> > > +      North Bridge Input/Output
> > > +
> > > +    ODM
> > > +      Output Data Mapping
> > > +
> > > +    OPM
> > > +      Output Protection Manager
> > > +
> > > +    OPP
> > > +      Output Plane Processor
> > > +
> > > +    OPTC
> > > +      Output Pipe Timing Combiner
> > > +
> > > +    OTG
> > > +      Output Timing Generator
> > > +
> > > +    PCON
> > > +      Power Controller
> > > +
> > > +    PGFSM
> > > +      Power Gate Finite State Machine
> > > +
> > > +    PPLib
> > > +      PowerPlay Library
> >
> > Maybe say that powerplay is the power management component.
> >
> > > +
> > > +    PSR
> > > +      Panel Self Refresh
> > > +
> > > +    SCL
> > > +      Scaler
> > > +
> > > +    SDP
> > > +      Scalable Data Port
> > > +
> > > +    SMU
> > > +      System Management Unit
> > > +
> > > +    SLS
> > > +      Single Large Surface
> > > +
> > > +    SST
> > > +      Single Stream Transport
> > > +
> > > +    TMDS
> > > +      Transition-Minimized Differential Signaling
> > > +
> > > +    TMZ
> > > +      Trusted Memory Zone
> > > +
> > > +    TTU
> > > +      Time to Underflow
> > > +
> > > +    VRR
> > > +      Variable Refresh Rate
> > > +
> > > +    UVD
> > > +      Unified Video Decoder
> > > +
> > > +    VCE
> > > +      Video Compression Engine
> > > +
> > > +    VCN
> > > +      Video Codec Next
> > > --
> > > 2.25.1
> > >
> >



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