search for: ps176

...p.c does, it's the first time I ever looked at amdgpu code. Two notes on CEC-Tunneling-over-AUX: 1) You need to be very careful about which USB-C/DP/mini-DP to HDMI adapters you buy. Only a few support this feature correctly today. Known chipsets that support this are Parade PS175 & PS176 and MegaChips 2900. Unfortunately almost all Parade-based adapters do not hook up the HDMI CEC pin to the chip, making them useless for this. The Parade reference design was only recently changed to hook up this pin, so perhaps this situation will change for new Parade-based adapters...

...unctional change in patch 5 as pointed out by Harry Wentland. Two notes on CEC-Tunneling-over-AUX: 1) You need to be very careful about which USB-C/DP/mini-DP to HDMI adapters you buy. Only a few support this feature correctly today. Known chipsets that support this are Parade PS175 & PS176 and MegaChips 2900. Unfortunately almost all Parade-based adapters do not hook up the HDMI CEC pin to the chip, making them useless for this. The Parade reference design was only recently changed to hook up this pin, so perhaps this situation will change for new Parade-based adapters...

...rm_dp_cec.c index 1407b13a8d5d..8a718f85079a 100644 --- a/drivers/gpu/drm/drm_dp_cec.c +++ b/drivers/gpu/drm/drm_dp_cec.c @@ -16,7 +16,9 @@ * here. Quite a few active (mini-)DP-to-HDMI or USB-C-to-HDMI adapters * have a converter chip that supports CEC-Tunneling-over-AUX (usually the * Parade PS176), but they do not wire up the CEC pin, thus making CEC - * useless. + * useless. Note that MegaChips 2900-based adapters appear to have good + * support for CEC tunneling. Those adapters that I have tested using + * this chipset all have the CEC line connected. * * Sadly there is no way for thi...

...rm_dp_cec.c index 1407b13a8d5d..8a718f85079a 100644 --- a/drivers/gpu/drm/drm_dp_cec.c +++ b/drivers/gpu/drm/drm_dp_cec.c @@ -16,7 +16,9 @@ * here. Quite a few active (mini-)DP-to-HDMI or USB-C-to-HDMI adapters * have a converter chip that supports CEC-Tunneling-over-AUX (usually the * Parade PS176), but they do not wire up the CEC pin, thus making CEC - * useless. + * useless. Note that MegaChips 2900-based adapters appear to have good + * support for CEC tunneling. Those adapters that I have tested using + * this chipset all have the CEC line connected. * * Sadly there is no way for thi...

...ase contact me. I can't test this myself, but I can assist. Two notes on CEC-Tunneling-over-AUX: 1) You need to be very careful about which USB-C/DP/mini-DP to HDMI adapters you buy. Only a few support this feature correctly today. Known chipsets that support this are Parade PS175 & PS176 and MegaChips 2900. Unfortunately almost all Parade-based adapters do not hook up the HDMI CEC pin to the chip, making them useless for this. The Parade reference design was only recently changed to hook up this pin, so perhaps this situation will change for new Parade-based adapters...

...time I ever looked at amdgpu code. > > Two notes on CEC-Tunneling-over-AUX: > > 1) You need to be very careful about which USB-C/DP/mini-DP to HDMI > adapters you buy. Only a few support this feature correctly today. > Known chipsets that support this are Parade PS175 & PS176 and > MegaChips 2900. Unfortunately almost all Parade-based adapters > do not hook up the HDMI CEC pin to the chip, making them useless > for this. The Parade reference design was only recently changed > to hook up this pin, so perhaps this situation will change for >...