[PATCH v3 4/4] drm/i915/alpm: Alpm aux wake configuration for lnl

[Murthy, Arun R]

> -----Original Message-----
> From: Hogander, Jouni <jouni.hogander at intel.com>
> Sent: Tuesday, January 30, 2024 4:42 PM
> To: intel-gfx at lists.freedesktop.org
> Cc: Murthy, Arun R <arun.r.murthy at intel.com>; Hogander, Jouni
> <jouni.hogander at intel.com>
> Subject: [PATCH v3 4/4] drm/i915/alpm: Alpm aux wake configuration for lnl
> 
> Lunarlake has some configurations in ALPM_CTL register for legacy ALPM as
> well. Write these.
> 
> Bspec: 71477
> 
> v2: move version check to lnl_alpm_configure
> 
> Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
> ---
Reviewed-by: Arun R Murthy <arun.r.murthy at intel.com>

Thanks and Regards,
Arun R Murthy
--------------------

>  drivers/gpu/drm/i915/display/intel_psr.c | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> b/drivers/gpu/drm/i915/display/intel_psr.c
> index 7aedda0ca2d2..72cadad09db5 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -1554,6 +1554,21 @@ static void wm_optimization_wa(struct intel_dp
> *intel_dp,
>  			     wa_16013835468_bit_get(intel_dp), 0);  }
> 
> +static void lnl_alpm_configure(struct intel_dp *intel_dp) {
> +	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> +	enum transcoder cpu_transcoder = intel_dp->psr.transcoder;
> +	struct intel_psr *psr = &intel_dp->psr;
> +
> +	if (DISPLAY_VER(dev_priv) < 20)
> +		return;
> +
> +	intel_de_write(dev_priv, ALPM_CTL(cpu_transcoder),
> +		       ALPM_CTL_EXTENDED_FAST_WAKE_ENABLE |
> +		       ALPM_CTL_ALPM_ENTRY_CHECK(psr-
> >alpm_parameters.check_entry_lines) |
> +
> +ALPM_CTL_EXTENDED_FAST_WAKE_TIME(psr-
> >alpm_parameters.fast_wake_lines))
> +;
> +}
> +
>  static void intel_psr_enable_source(struct intel_dp *intel_dp,
>  				    const struct intel_crtc_state *crtc_state)  {
> @@ -1619,6 +1634,8 @@ static void intel_psr_enable_source(struct intel_dp
> *intel_dp,
>  			     intel_dp->psr.psr2_sel_fetch_enabled ?
>  			     IGNORE_PSR2_HW_TRACKING : 0);
> 
> +	lnl_alpm_configure(intel_dp);
> +
>  	/*
>  	 * Wa_16013835468
>  	 * Wa_14015648006
> --
> 2.34.1