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

[Nemesa Garg <nemesa.garg@intel.com>]

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]
v4: Swap old_state and new_state param[Ankit]
v5: In disable fn move win_sz after sharpness_ctl.

Signed-off-by: Nemesa Garg <nemesa.garg@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_casf.c    | 30 ++++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_casf.h    |  2 ++
 drivers/gpu/drm/i915/display/intel_display.c | 26 +++++++++++++++++
 3 files changed, 58 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_casf.c b/drivers/gpu/drm/i915/display/intel_casf.c
index 0e52fd83b772..7f6407d6034e 100644
--- a/drivers/gpu/drm/i915/display/intel_casf.c
+++ b/drivers/gpu/drm/i915/display/intel_casf.c
@@ -258,3 +258,33 @@ 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, SKL_PS_CTRL(crtc->pipe, 1), 0);
+	intel_de_write(display, SKL_PS_WIN_POS(crtc->pipe, 1), 0);
+	intel_de_write(display, SHARPNESS_CTL(crtc->pipe), 0);
+	intel_de_write(display, SKL_PS_WIN_SZ(crtc->pipe, 1), 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 1b2e848a1705..e76265e874bc 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -1038,6 +1038,24 @@ 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 *old_crtc_state,
+				 const struct intel_crtc_state *new_crtc_state)
+{
+	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
 
@@ -1188,6 +1206,9 @@ 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))
@@ -6726,6 +6747,11 @@ 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));
-- 
2.25.1