This series adds support for the Tegra2x's display peripheral. This supports the LCD display on Seaboard and we use this to enable console output in U-Boot on the LCD.
Configuration is via the device tree. Proposed bindings are included in this series.
I looked at the message "[RFC 4/4] drm: Add NVIDIA Tegra support" on device-tree-discuss. There does not seem to be any conclusion for now.
While I agree EDID is convenient for machines I would prefer to provide a user-friendly way of selecting LCD settings as well, with EDID more as a fallback and auto-detection when available.
To improve performance two optimisations are offered:
1. The LCD frame buffer is cached, with the cache being flushed after each newline sent to putc(), and in a few other situations. This dramatically increases performance (around 10x). This requires a few additions to the ARM cache support.
2. The console supports scrolling in steps of more than 1 line. This speeds up scrolling output considerably, particularly commands like 'printenv' which display a lot of output. This requires a new CONFIG and a change to the console_scrollup() function.
Changes in v2: - Add new patch to use const in pinmux_config_pingroup/table() - Add nvidia prefix to device tree properties - Align tegra display using new CONFIG_LCD_ALIGNMENT feature - Put the LCD cache flush logic into lcd_putc() instead of lcd_puts() - Update LCD driver to deal with new fdt bindings - Update seaboard LCD definitions for new fdt binding - Use a more generic config CONFIG_LCD_ALIGNMENT for lcd alignment - Use const where possible in funcmux
Mayuresh Kulkarni (1): tegra: Enable display/lcd support on Seaboard
Simon Glass (17): Add gpio_request() to asm-generic header fdt: Add debugging to fdtdec_get_int/addr() fdt: Add function to look up a phandle's register address fdt: Add header guard to fdtdec.h tegra: Use const for pinmux_config_pingroup/table() tegra: Add display support to funcmux tegra: fdt: Add LCD definitions for Tegra tegra: Add support for PWFM tegra: Add LCD driver tegra: Add LCD support to Nvidia boards arm: Add control over cachability of memory regions lcd: Add CONFIG_LCD_ALIGNMENT to select frame buffer alignment lcd: Add support for flushing LCD fb from dcache after update tegra: Align LCD frame buffer to section boundary tegra: Support control of cache settings for LCD tegra: fdt: Add LCD definitions for Seaboard lcd: Add CONSOLE_SCROLL_LINES option to speed console
Wei Ni (1): tegra: Add SOC support for display/lcd
README | 16 + arch/arm/cpu/armv7/cache_v7.c | 11 + arch/arm/cpu/armv7/tegra2/Makefile | 1 + arch/arm/cpu/armv7/tegra2/display.c | 271 +++++++++++ arch/arm/cpu/armv7/tegra2/funcmux.c | 39 ++ arch/arm/cpu/armv7/tegra2/pinmux.c | 4 +- arch/arm/cpu/armv7/tegra2/pwfm.c | 40 ++ arch/arm/dts/tegra20.dtsi | 25 + arch/arm/include/asm/arch-tegra2/dc.h | 544 +++++++++++++++++++++++ arch/arm/include/asm/arch-tegra2/display.h | 133 ++++++ arch/arm/include/asm/arch-tegra2/pinmux.h | 4 +- arch/arm/include/asm/arch-tegra2/pwfm.h | 54 +++ arch/arm/include/asm/system.h | 30 ++ arch/arm/lib/cache-cp15.c | 62 +++- board/nvidia/common/board.c | 21 +- board/nvidia/dts/tegra2-seaboard.dts | 21 + common/cmd_echo.c | 3 +- common/lcd.c | 84 +++- doc/device-tree-bindings/video/nvidia-video.txt | 88 ++++ drivers/video/Makefile | 1 + drivers/video/tegra.c | 392 ++++++++++++++++ include/asm-generic/gpio.h | 9 + include/configs/seaboard.h | 12 +- include/configs/tegra2-common.h | 3 + include/fdtdec.h | 17 + include/lcd.h | 11 + lib/fdtdec.c | 34 ++- 27 files changed, 1891 insertions(+), 39 deletions(-) create mode 100644 arch/arm/cpu/armv7/tegra2/display.c create mode 100644 arch/arm/cpu/armv7/tegra2/pwfm.c create mode 100644 arch/arm/include/asm/arch-tegra2/dc.h create mode 100644 arch/arm/include/asm/arch-tegra2/display.h create mode 100644 arch/arm/include/asm/arch-tegra2/pwfm.h create mode 100644 doc/device-tree-bindings/video/nvidia-video.txt create mode 100644 drivers/video/tegra.c