designware_dsi

Namespaces

Enumerations

enum class DpiColorComponentMapping : uint8_t
Name Value Comments
k16BitR5G6B5Config1 0b0000

Known as "16-Bit Config 1" in the databook.
k16BitR5G6B5Config2 0b0001

Known as "16-Bit Config 2" in the databook.
k16BitR5G6B5Config3 0b0010

Known as "16-Bit Config 3" in the databook.
k18BitR6G6B6Config1 0b0011

Known as "18-Bit Config 1" in the databook.
k18BitR6G6B6Config2 0b0100

Known as "18-Bit Config 2" in the databook.
k24BitR8G8B8 0b0101

Known as "24-Bits" in the databook.
k20BitYcbcr422 0b0110

Known as "20-Bit YCbCr 4:2:2 Loosely Packed" in the databook.
It requires 2 clock cycles to transmit two contiguous pixels.
k24BitYcbcr422 0b0111

Known as "24-Bit YCbCr 4:2:2" in the databook.
It requires 2 clock cycles to transmit two contiguous pixels.
k16BitYcbcr422 0b1000

Known as "16-Bit YCbCr 4:2:2" in the databook.
It requires 2 clock cycles to transmit two contiguous pixels.
k30BitR10G10B10 0b1001

Known as "30-Bit" in the databook.
k36BitR12G12B12 0b1010

Known as "36-Bit" in the databook.
It requires 2 clock cycles to transmit one pixel.
k12BitYcbcr420 0b1011

Known as "12-Bit YCbCr 4:2:0" in the databook.
kDsc24Compressed 0b1100

Known as "DSC24 compress data" in the databook.

Defines the mapping between RGB / YCbCr components and the pins on the DPI

interface.

The mapping between color components and DPI interface pins is documented

in DSI Host Databook, Section 2.3.2 "Enabling DPI", Figure 2-2 "Location of

Color Components in an Extension of DPI-2 Pixel Interface", page 42.

The enum values are used by the DPI_COLOR_CODING register fields to

distinguish the DPI color formats:

DSI Host Databook, Section 5.1.5 "DPI_COLOR_CODING", page 195.

Defined at line 28 of file ../../src/graphics/display/lib/designware-dsi/dpi-interface-config.h

Records

Functions

  • int32_t DphyLaneByteRateToDpiPixelRateRatio (int64_t dphy_data_lane_bytes_per_second, int64_t dpi_pixel_rate_hz)

    The ratio of MIPI D-PHY data lane byte transmission rate (bytes per

    second) to the MIPI DPI pixel rate (Hz).

    The DPI pixel rate must be divisble by the D-PHY data lane byte transmission

    rate, and the quotient must be

    >= kMinDphyLaneByteRateToDpiPixelClockFrequencyRatio and

    <

    = kMaxDphyLaneByteRateToDpiPixelClockFrequencyRatio.

    Defined at line 31 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

  • int32_t DpiPixelToDphyLaneByteClockCycle (int32_t pixels, int64_t dpi_pixel_rate_hz, int64_t dphy_data_lane_bytes_per_second)

    Amount of time it takes to transmit a number of pixels across the DPI

    interface between the display engine frontend and the DesignWare DSI

    host controller.

    The result is expressed in D-PHY lane byte clock cycles, which is the

    number of bytes that can be transmitted on a D-PHY data lane in High Speed

    mode.

    `pixels` must be >= 0 and

    <

    = 2^23 - 1.

    The DPI pixel rate (Hz) must be divisble by the D-PHY data lane byte

    transmission rate (bytes per second), and the quotient must be

    >= kMinDphyLaneByteRateToDpiPixelClockFrequencyRatio and

    <

    = kMaxDphyLaneByteRateToDpiPixelClockFrequencyRatio.

    Defined at line 61 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

  • bool IsValidDpiVideoTiming (const display::DisplayTiming & timing, int64_t dphy_data_lane_bytes_per_second)

    Returns whether the given `timing` is valid for the DesignWare DSI Host

    Controller's DPI interface input when the D-PHY the Controller connects

    to is configured to transmit at `dphy_data_lane_bytes_per_second` in High

    Speed mode.

    Defined at line 128 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

Variables

const int kMinSupportedDphyDataLaneCount

Defined at line 18 of file ../../src/graphics/display/lib/designware-dsi/dphy-interface-config.h

const int32_t kMinDphyLaneByteRateToDpiPixelRateRatio

Defined at line 21 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

const int kMaxSupportedDphyDataLaneCount

Defined at line 22 of file ../../src/graphics/display/lib/designware-dsi/dphy-interface-config.h

const int32_t kMaxDphyLaneByteRateToDpiPixelRateRatio

Defined at line 22 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

const int32_t kMaxHighSpeedByteClockToEscapeClockFrequencyRatio

Defined at line 26 of file ../../src/graphics/display/lib/designware-dsi/dphy-interface-config.h

const int32_t kMinPossibleMaxDataLaneHsToLpTransitionDurationLaneByteClockCycles

Defined at line 30 of file ../../src/graphics/display/lib/designware-dsi/dphy-interface-config.h

const int32_t kMaxPossibleMaxDataLaneHsToLpTransitionDurationLaneByteClockCycles

Defined at line 31 of file ../../src/graphics/display/lib/designware-dsi/dphy-interface-config.h

const int32_t kMinPossibleMaxDataLaneLpToHsTransitionDurationLaneByteClockCycles

Defined at line 35 of file ../../src/graphics/display/lib/designware-dsi/dphy-interface-config.h

const int32_t kMaxPossibleMaxDataLaneLpToHsTransitionDurationLaneByteClockCycles

Defined at line 36 of file ../../src/graphics/display/lib/designware-dsi/dphy-interface-config.h

const int32_t kMinPossibleMaxClockLaneHsToLpTransitionDurationLaneByteClockCycles

Defined at line 40 of file ../../src/graphics/display/lib/designware-dsi/dphy-interface-config.h

const int32_t kMaxPossibleMaxClockLaneHsToLpTransitionDurationLaneByteClockCycles

Defined at line 41 of file ../../src/graphics/display/lib/designware-dsi/dphy-interface-config.h

const int32_t kMinPossibleMaxClockLaneLpToHsTransitionDurationLaneByteClockCycles

Defined at line 45 of file ../../src/graphics/display/lib/designware-dsi/dphy-interface-config.h

const int32_t kMaxPossibleMaxClockLaneLpToHsTransitionDurationLaneByteClockCycles

Defined at line 46 of file ../../src/graphics/display/lib/designware-dsi/dphy-interface-config.h

const int32_t kMaxHorizontalSyncWidthPx

Defined at line 71 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

const int32_t kMaxHorizontalBackPorchPx

Defined at line 72 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

const int32_t kMaxHorizontalTotalPx

Defined at line 73 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

const int32_t kMaxPossibleMaxVerticalBlankEscapeModeCommandSizeBytes

Defined at line 75 of file ../../src/graphics/display/lib/designware-dsi/dpi-interface-config.h

const int32_t kMaxPossibleMaxVerticalActiveEscapeModeCommandSizeBytes

Defined at line 79 of file ../../src/graphics/display/lib/designware-dsi/dpi-interface-config.h

const int32_t kMaxHorizontalSyncTimeLaneByteClockCycles

Defined at line 80 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

const int32_t kMaxHorizontalBackPorchTimeLaneByteClockCycles

Defined at line 87 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

const int32_t kMaxHorizontalTotalTimeLaneByteClockCycles

Defined at line 94 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

const int32_t kMaxVerticalActiveLines

Defined at line 101 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

const int32_t kMaxVerticalFrontPorchLines

Defined at line 108 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

const int32_t kMaxVerticalSyncWidthLines

Defined at line 115 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h

const int32_t kMaxVerticalBackPorchLines

Defined at line 122 of file ../../src/graphics/display/lib/designware-dsi/dpi-video-timing.h