Hello,
This patchset adds support for the Solomon Systech SSD2828 bridge chip, which is used to convert parallel LCD interface into MIPI DSI interface and drive MIPI LCD display in some tablets. In particular, this allows to have a working LCD display in my Allwinner A31s based MSI Primo81 tablet.
The core of the SSD2828 support code is generic and should work with any SoC (as long as the hardware supports the standard u-boot GPIO API). It also does not have any hardcoded assumptions about the MSI Primo81 display and should be able to drive any MIPI LCD panel (as long as the number of data lanes and the bitrate per lane is provided in the config struct). The code tries to follow the standard power-up sequence described in the SSD2828 datasheet. However it has been tested only on my MSI Primo81 tablet so far.
The sunxi specific part includes a small glue code in the sunxi display driver and the defconfig update for the MSI Primo81 tablet.
This can be applied after http://lists.denx.de/pipermail/u-boot/2015-January/200753.html 'sunxi: video: Add lvds support' patchset to the 'next' branch in the u-boot-sunxi repository.
And here is a bonus picture :-) http://linux-sunxi.org/File:MSI_Primo81_and_LCD_support_in_u-boot.jpg
Siarhei Siamashka (8): sunxi: axp221: Add ELDO[1-3] support include: Add header file with MIPI DSI constants from the Linux kernel video: Add support for SSD2828 (parallel LCD to MIPI bridge) video: sunxi: Hook up SSD2828 with the sunxi video driver sun6i: Add LCD display support for MSI Primo81 tablet video: ssd2828: Allow using 'pclk' as the PLL clock source video: sunxi: Switch from 'tx_clk' to 'pclk' for SSD2828 video: ssd2828: Use MIPI DCS commands to retrieve the LCD panel id
board/sunxi/Kconfig | 60 +++++ board/sunxi/board.c | 1 + configs/MSI_Primo81_defconfig | 9 + drivers/power/Kconfig | 10 + drivers/power/axp221.c | 51 ++++ drivers/video/Makefile | 1 + drivers/video/ssd2828.c | 575 ++++++++++++++++++++++++++++++++++++++++ drivers/video/ssd2828.h | 128 +++++++++ drivers/video/sunxi_display.c | 3 + drivers/video/sunxi_lcd_panel.c | 37 +++ drivers/video/sunxi_lcd_panel.h | 3 + include/axp221.h | 9 + include/mipi_display.h | 130 +++++++++ 13 files changed, 1017 insertions(+) create mode 100644 drivers/video/ssd2828.c create mode 100644 drivers/video/ssd2828.h create mode 100644 include/mipi_display.h