[PATCH 09/10] drm/i915/display: Enable/disable casf

[Nautiyal, Ankit K]

On 4/2/2025 6:26 PM, Nemesa Garg wrote:
> To enable or disable the sharpness check the
> casf_enable flag. While enabling the sharpness
> write the programmable coefficients, sharpness
> register bits and also enable the scaler.
> Load the filter lut value which needs to be done
> one time while enabling the sharpness.
>
> v2: Introduce casf_enable here[Ankit]
> v3: Use is_disabling in casf_disabling[Ankit]
>
> Signed-off-by: Nemesa Garg <nemesa.garg at intel.com>
> Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
> ---
>   drivers/gpu/drm/i915/display/intel_casf.c    | 27 ++++++++++++++++++++
>   drivers/gpu/drm/i915/display/intel_casf.h    |  2 ++
>   drivers/gpu/drm/i915/display/intel_display.c | 26 +++++++++++++++++++
>   3 files changed, 55 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_casf.c b/drivers/gpu/drm/i915/display/intel_casf.c
> index 91ed12210e60..ce2f7fed33bb 100644
> --- a/drivers/gpu/drm/i915/display/intel_casf.c
> +++ b/drivers/gpu/drm/i915/display/intel_casf.c
> @@ -251,3 +251,30 @@ void intel_casf_scaler_compute_config(struct intel_crtc_state *crtc_state)
>   					      filter_coeff[i]);
>   	}
>   }
> +
> +void intel_casf_enable(struct intel_crtc_state *crtc_state)
> +{
> +	struct intel_display *display = to_intel_display(crtc_state);
> +	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> +	u32 sharpness_ctl;
> +
> +	intel_filter_lut_load(crtc, crtc_state);
> +
> +	intel_casf_write_coeff(crtc_state);
> +
> +	sharpness_ctl = FILTER_EN | FILTER_STRENGTH(crtc_state->hw.casf_params.strength);
> +
> +	sharpness_ctl |= crtc_state->hw.casf_params.win_size;
> +
> +	intel_de_write(display, SHARPNESS_CTL(crtc->pipe), sharpness_ctl);
> +
> +	skl_scaler_setup_casf(crtc_state);
> +}
> +
> +void intel_casf_disable(const struct intel_crtc_state *crtc_state)
> +{
> +	struct intel_display *display = to_intel_display(crtc_state);
> +	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> +
> +	intel_de_write(display, SHARPNESS_CTL(crtc->pipe), 0);
> +}
> diff --git a/drivers/gpu/drm/i915/display/intel_casf.h b/drivers/gpu/drm/i915/display/intel_casf.h
> index 026a2b8348df..301a9fbd930f 100644
> --- a/drivers/gpu/drm/i915/display/intel_casf.h
> +++ b/drivers/gpu/drm/i915/display/intel_casf.h
> @@ -18,5 +18,7 @@ void intel_filter_lut_load(struct intel_crtc *crtc,
>   			   const struct intel_crtc_state *crtc_state);
>   void intel_casf_scaler_compute_config(struct intel_crtc_state *crtc_state);
>   bool intel_casf_needs_scaler(const struct intel_crtc_state *crtc_state);
> +void intel_casf_enable(struct intel_crtc_state *crtc_state);
> +void intel_casf_disable(const struct intel_crtc_state *crtc_state);
>   
>   #endif /* __INTEL_CASF_H__ */
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index db82da523323..c75dbd0ca329 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -1036,6 +1036,24 @@ static bool audio_disabling(const struct intel_crtc_state *old_crtc_state,
>   		 memcmp(old_crtc_state->eld, new_crtc_state->eld, MAX_ELD_BYTES) != 0);
>   }
>   
> +static bool intel_casf_enabling(const struct intel_crtc_state *new_crtc_state,
> +				const struct intel_crtc_state *old_crtc_state)
> +{
> +	if (!new_crtc_state->hw.active)
> +		return false;
> +
> +	return is_enabling(hw.casf_params.casf_enable, old_crtc_state, new_crtc_state);
> +}
> +
> +static bool intel_casf_disabling(const struct intel_crtc_state *new_crtc_state,
> +				 const struct intel_crtc_state *old_crtc_state)

I think there is typo here, we are passing old_crtc_state first and 
new_crtc_state second.

Missed to point this earlier. Need to fix this.


Regards,

Ankit

> +{
> +	if (!new_crtc_state->hw.active)
> +		return false;
> +
> +	return is_disabling(hw.casf_params.casf_enable, old_crtc_state, new_crtc_state);
> +}
> +
>   #undef is_disabling
>   #undef is_enabling
>   
> @@ -1185,6 +1203,9 @@ static void intel_pre_plane_update(struct intel_atomic_state *state,
>   	if (audio_disabling(old_crtc_state, new_crtc_state))
>   		intel_encoders_audio_disable(state, crtc);
>   
> +	if (intel_casf_disabling(old_crtc_state, new_crtc_state))
> +		intel_casf_disable(new_crtc_state);
> +
>   	intel_drrs_deactivate(old_crtc_state);
>   
>   	if (hsw_ips_pre_update(state, crtc))
> @@ -6718,6 +6739,11 @@ static void intel_pre_update_crtc(struct intel_atomic_state *state,
>   			intel_vrr_set_transcoder_timings(new_crtc_state);
>   	}
>   
> +	if (intel_casf_enabling(new_crtc_state, old_crtc_state))
> +		intel_casf_enable(new_crtc_state);
> +	else if (new_crtc_state->hw.casf_params.strength != old_crtc_state->hw.casf_params.strength)
> +		intel_casf_update_strength(new_crtc_state);
> +
>   	intel_fbc_update(state, crtc);
>   
>   	drm_WARN_ON(display->drm, !intel_display_power_is_enabled(display, POWER_DOMAIN_DC_OFF));