[U-Boot] [linux-sunxi] Re: [PATCH] sunxi: Add Gemei G9 (Allwinner A10/sun4i) tablet

[Siarhei Siamashka]

On Tue, 20 Jan 2015 15:43:31 +0100
Hans de Goede <hdegoede at redhat.com> wrote:

> Hi,
> 
> On 19-01-15 21:16, Priit Laes wrote:
> > Gemei G9 is an A10 based tablet, with 1G RAM, 16G NAND, 1024x768
> > IPS LCD display, stereo speakers, 1.3MP front camera and 5 MP
> > rear camera, 8000mAh battery, GT901 2+1 touchscreen, Bosch BMA250
> > accelerometer and RTL8188CUS USB wifi. It also has MicroSD slot,
> > miniHDMI, 1 x MicroUSB OTG port and 1 x MicroUSB host port and
> > 3.5mm headphone jack.
> > More details are available at: http://linux-sunxi.org/Gemei_G9
> >
> > Signed-off-by: Priit Laes <plaes at plaes.org>
> 
> Thanks, queued up in u-boot-sunxi/next for merging into v2015.04
> 
> Regards,
> 
> Hans
> 
> > ---
> >   board/sunxi/MAINTAINERS          |  5 +++++
> >   configs/sunxi_Gemei_G9_defconfig | 20 ++++++++++++++++++++
> >   2 files changed, 25 insertions(+)
> >   create mode 100644 configs/sunxi_Gemei_G9_defconfig

[...]

> > +CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:18,pclk_khz:100000,le:799,ri:260,up:15,lo:16,hs:1,vs:1,sync:3,vmode:0"
> > +CONFIG_VIDEO_LCD_PANEL_LVDS=y
> > +CONFIG_VIDEO_LCD_POWER="PH8"
> > +CONFIG_VIDEO_LCD_BL_EN="PH7"
> > +CONFIG_VIDEO_LCD_BL_PWM="PB2"

We have already talked with plaes on IRC yesterday, just now bringing it
here. I have finally updated the http://linux-sunxi.org/LCD page to add
LVDS panels data and now for Gemei_G9 we have the following settings
there:

CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:24,pclk_khz:100000,le:799,ri:260,up:15,lo:16,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
# warning: unsupported 'lcd_lvds_mode' : 1
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"
CONFIG_VIDEO_LCD_BL_PWM="PB2"

It's good that lcd_lvds_mode=1 apparently works without problems, while
this was not fully expected according to
    http://lists.denx.de/pipermail/u-boot/2015-January/200168.html

Also confirming whether 18-bit or 24-bit is the correct color
depth would be a good idea. This tablet has 'lcd_frm = 1' and
'lcd_lvds_bitwidth = 0' in fex.

-- 
Best regards,
Siarhei Siamashka