Re: [PATCH] drm/i915/display/lspcon: Increase LSPCON mode settle timeout

[Jani Nikula]

On Thu, 15 Sep 2022, Pablo Ceballos <pceballos@xxxxxxxxxx> wrote:
> On some devices the Parade PS175 takes more than 400ms to settle in PCON
> mode.

Got any bug report with more info, or any other details to back this up?
This is kind of thin. What's the 800 ms based on?

BR,
Jani.


>
> Signed-off-by: Pablo Ceballos <pceballos@xxxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/display/intel_lspcon.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c b/drivers/gpu/drm/i915/display/intel_lspcon.c
> index 15d59de8810e..b4cbade13ee5 100644
> --- a/drivers/gpu/drm/i915/display/intel_lspcon.c
> +++ b/drivers/gpu/drm/i915/display/intel_lspcon.c
> @@ -166,7 +166,7 @@ static enum drm_lspcon_mode lspcon_wait_mode(struct intel_lspcon *lspcon,
>  	drm_dbg_kms(&i915->drm, "Waiting for LSPCON mode %s to settle\n",
>  		    lspcon_mode_name(mode));
>  
> -	wait_for((current_mode = lspcon_get_current_mode(lspcon)) == mode, 400);
> +	wait_for((current_mode = lspcon_get_current_mode(lspcon)) == mode, 800);
>  	if (current_mode != mode)
>  		drm_err(&i915->drm, "LSPCON mode hasn't settled\n");

-- 
Jani Nikula, Intel Open Source Graphics Center