On Tue, Mar 27, 2018 at 09:48:23AM +0200, Arnd Bergmann wrote:

On Tue, Mar 27, 2018 at 4:21 AM, Guo Ren [off-list ref] wrote:

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On Mon, Mar 26, 2018 at 03:16:31PM +0200, Arnd Bergmann wrote:

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+CONFIG_CFG80211=y
+CONFIG_CFG80211_DEBUGFS=y
+CONFIG_CFG80211_WEXT=y

I would guess you want IPV6 but not WEXT here.

Gx6605s devlepment board support usb-wifi.
Perhaps WEXT is needed by iwconfig or iwlist? So I just enable it.
However, I'll consider to remove it.

I think it's only for backwards compatibility with old versions of
those tools. There are some older drivers that use WEXT as the
native interface, but CFG80211 based drivers have a netlink
interface.

Thx for remind. I'll check.

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+CONFIG_FB=y
+CONFIG_FB_TILEBLITTING=y
+CONFIG_FB_SIMPLE=y
+CONFIG_BACKLIGHT_LCD_SUPPORT=y
+# CONFIG_LCD_CLASS_DEVICE is not set
+# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
+CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y
+CONFIG_LOGO=y
+# CONFIG_LOGO_LINUX_MONO is not set
+# CONFIG_LOGO_LINUX_VGA16 is not set

For new platforms, using the DRM subsystem is the recommend
way to do graphics, it mostly replaces the framebuffer subsystem
here.

These used by:
https://github.com/c-sky/addons-linux/tree/master/addons/drivers/video/fbdev/nationalchip

I'll consider the DRM subsystem.

It used to be rather hard to write a new DRM driver, but that has
improved a lot recently. You might be able to fit your driver into
drivers/gpu/drm/tinydrm/, or maybe do something a bit more complex
like drivers/gpu/drm/pl111/ or drivers/gpu/drm/stm/.

For this patchset, I won't upstream the fbdev driver. I'll remove the
CONFIG_FB in defconfig first.

Thx for remind about the develop-tips, and it's very helpful.

Best Regards
 Guo Ren