drm/i915/casf: Extract scaler_has_casf()

Extract a small helper to determine if the scaler supports
the sharpness filter or not.

Reviewed-by: Michał Grzelak <michal.grzelak@intel.com>
Reviewed-by: Nemesa Garg <nemesa.garg@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20260407175244.19654-5-ville.syrjala@linux.intel.com

diff --git a/drivers/gpu/drm/i915/display/skl_scaler.c b/drivers/gpu/drm/i915/display/skl_scaler.c
index e9fe5c0bf6ffa3f50c1d9f0c38f1664c6fd4feee..525afd7361957199c211f6bc6fea6338e89503d2 100644 (file)
--- a/drivers/gpu/drm/i915/display/skl_scaler.c
+++ b/drivers/gpu/drm/i915/display/skl_scaler.c
@@ -323,19 +323,24 @@ int skl_update_scaler_plane(struct intel_crtc_state *crtc_state,
                                 need_scaler);
 }
 
+static bool scaler_has_casf(struct intel_display *display, int scaler_id)
+{
+       return HAS_CASF(display) && scaler_id == 1;
+}
+
 static int intel_allocate_scaler(struct intel_crtc_scaler_state *scaler_state,
                                 struct intel_crtc *crtc,
                                 struct intel_plane_state *plane_state,
                                 bool casf_scaler)
 {
+       struct intel_display *display = to_intel_display(crtc);
        int i;
 
        for (i = 0; i < crtc->num_scalers; i++) {
                if (scaler_state->scalers[i].in_use)
                        continue;
 
-               /* CASF needs second scaler */
-               if (!plane_state && casf_scaler && i != 1)
+               if (casf_scaler && !scaler_has_casf(display, i))
                        continue;
 
                scaler_state->scalers[i].in_use = true;
@@ -982,8 +987,7 @@ void skl_scaler_get_config(struct intel_crtc_state *crtc_state)
 
                id = i;
 
-               /* Read CASF regs for second scaler */
-               if (HAS_CASF(display) && id == 1)
+               if (scaler_has_casf(display, i))
                        intel_casf_sharpness_get_config(crtc_state);
 
                if (!crtc_state->pch_pfit.casf.enable)