f1aafdcd42
For some unknown reason we may get SYNC_LOST errors from the display subsystem at initialization time if we don't sleep before resetting the DSS. See the source (dss.c) for more comments. However, 50ms is quite long time to sleep, and with some configurations the SYNC_LOST may never happen, so this patch creates a Kconfig option to disable the sleep. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
140 lines
3.8 KiB
Plaintext
140 lines
3.8 KiB
Plaintext
menuconfig OMAP2_DSS
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tristate "OMAP2+ Display Subsystem support (EXPERIMENTAL)"
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depends on ARCH_OMAP2PLUS
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help
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OMAP2+ Display Subsystem support.
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if OMAP2_DSS
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config OMAP2_VRAM_SIZE
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int "VRAM size (MB)"
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range 0 32
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default 0
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help
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The amount of SDRAM to reserve at boot time for video RAM use.
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This VRAM will be used by omapfb and other drivers that need
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large continuous RAM area for video use.
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You can also set this with "vram=<bytes>" kernel argument, or
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in the board file.
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config OMAP2_DSS_DEBUG_SUPPORT
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bool "Debug support"
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default y
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help
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This enables debug messages. You need to enable printing
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with 'debug' module parameter.
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config OMAP2_DSS_COLLECT_IRQ_STATS
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bool "Collect DSS IRQ statistics"
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depends on OMAP2_DSS_DEBUG_SUPPORT
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default n
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help
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Collect DSS IRQ statistics, printable via debugfs.
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The statistics can be found from
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<debugfs>/omapdss/dispc_irq for DISPC interrupts, and
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<debugfs>/omapdss/dsi_irq for DSI interrupts.
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config OMAP2_DSS_DPI
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bool "DPI support"
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default y
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help
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DPI Interface. This is the Parallel Display Interface.
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config OMAP2_DSS_RFBI
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bool "RFBI support"
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default n
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help
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MIPI DBI support (RFBI, Remote Framebuffer Interface, in Texas
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Instrument's terminology).
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DBI is a bus between the host processor and a peripheral,
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such as a display or a framebuffer chip.
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See http://www.mipi.org/ for DBI spesifications.
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config OMAP2_DSS_VENC
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bool "VENC support"
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default y
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help
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OMAP Video Encoder support for S-Video and composite TV-out.
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config OMAP4_DSS_HDMI
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bool "HDMI support"
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depends on ARCH_OMAP4
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default y
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help
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HDMI Interface. This adds the High Definition Multimedia Interface.
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See http://www.hdmi.org/ for HDMI specification.
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config OMAP2_DSS_SDI
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bool "SDI support"
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depends on ARCH_OMAP3
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default n
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help
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SDI (Serial Display Interface) support.
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SDI is a high speed one-way display serial bus between the host
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processor and a display.
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config OMAP2_DSS_DSI
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bool "DSI support"
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depends on ARCH_OMAP3
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default n
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help
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MIPI DSI (Display Serial Interface) support.
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DSI is a high speed half-duplex serial interface between the host
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processor and a peripheral, such as a display or a framebuffer chip.
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See http://www.mipi.org/ for DSI spesifications.
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config OMAP2_DSS_USE_DSI_PLL
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bool "Use DSI PLL for PCLK (EXPERIMENTAL)"
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default n
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depends on OMAP2_DSS_DSI
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help
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Use DSI PLL to generate pixel clock. Currently only for DPI output.
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DSI PLL can be used to generate higher and more precise pixel clocks.
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config OMAP2_DSS_FAKE_VSYNC
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bool "Fake VSYNC irq from manual update displays"
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default n
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help
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If this is selected, DSI will generate a fake DISPC VSYNC interrupt
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when DSI has sent a frame. This is only needed with DSI or RFBI
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displays using manual mode, and you want VSYNC to, for example,
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time animation.
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config OMAP2_DSS_MIN_FCK_PER_PCK
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int "Minimum FCK/PCK ratio (for scaling)"
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range 0 32
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default 0
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help
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This can be used to adjust the minimum FCK/PCK ratio.
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With this you can make sure that DISPC FCK is at least
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n x PCK. Video plane scaling requires higher FCK than
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normally.
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If this is set to 0, there's no extra constraint on the
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DISPC FCK. However, the FCK will at minimum be
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2xPCK (if active matrix) or 3xPCK (if passive matrix).
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Max FCK is 173MHz, so this doesn't work if your PCK
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is very high.
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config OMAP2_DSS_SLEEP_BEFORE_RESET
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bool "Sleep 50ms before DSS reset"
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default y
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help
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For some unknown reason we may get SYNC_LOST errors from the display
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subsystem at initialization time if we don't sleep before resetting
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the DSS. See the source (dss.c) for more comments.
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However, 50ms is quite long time to sleep, and with some
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configurations the SYNC_LOST may never happen, so the sleep can
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be disabled here.
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endif
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