Hi,
Dne ponedeljek, 15. maj 2017 ob 08:31:22 CEST je Maxime Ripard napisal(a):
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.
AFAIK, H3 and newer SoCs with TV out have two additional registers for hot plug detection. Here are named SUNXI_TVE_AUTO_DETECT_CFG0 and SUNXI_TVE_AUTO_DETECT_CFG1 and they are somewhat explained in R40 manual.
I'm not sure if this changes reliability a lot or not.
Best regards, Jernej