> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Jouni
> Högander
> Sent: Monday, May 29, 2023 6:30 PM
> To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> Subject: [PATCH] drm/i915: Use 18 fast wake fast wake AUX sync
> len
>
> HW default for wake sync pulses is 18. 10 precarge and 8 preamble. There is
> no reason to change this especially as it is causing problems with certain eDP
> panels.
>
> Signed-off-by: Jouni Högander <jouni.hogander@xxxxxxxxx>
> Fixes: 605f7c731333 ("drm/i915: Fix fast wake AUX sync len")
> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/8475
> ---
> drivers/gpu/drm/i915/display/intel_dp_aux.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c
> b/drivers/gpu/drm/i915/display/intel_dp_aux.c
> index 0c27db8ae4f1..197c6e81db14 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_aux.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c
> @@ -129,7 +129,7 @@ static int intel_dp_aux_sync_len(void)
>
> static int intel_dp_aux_fw_sync_len(void) {
> - int precharge = 16; /* 10-16 */
> + int precharge = 10; /* 10-16 */
Is this change required in intel_dp_aux_sync_len() as well?
Thanks and Regards,
Arun R Murthy
--------------------
> int preamble = 8;
>
> return precharge + preamble;
> --
> 2.34.1
