Re: [U-Boot] [linux-sunxi] Re: [PATCH 3/3] sunxi: video: Add H3/H5 TV out driver

On Sat, May 13, 2017 at 11:14:00PM +0800, Chen-Yu Tsai wrote:

...

...

...

+static int sunxi_tve_get_plug_in_status(void) +{

•   struct sunxi_tve_reg * const tve =
  

•           (struct sunxi_tve_reg *)SUNXI_TVE0_BASE;
  

•   u32 status;
  

•   status = readl(&tve->auto_detect_status) &
  

•           SUNXI_TVE_AUTO_DETECT_STATUS_MASK(0);
  

•   return status == SUNXI_TVE_AUTO_DETECT_STATUS_CONNECTED;
  

So TVE is now capable of hpd checking, right?

Is is a feature that exists in A10/A13/A20 or is it new in H3?

AFAIK this is also available in the earlier SoCs. Maxime mentioned that it was unreliable though.

This was supposed to be there, but those registers were undocumented. It would be nice to try to see if it works.

Maxime