drm/i915/casf: Disable CASF with joiner

Disable CASF with joiner as it is not supported
in hardware.

v2: Replace dmesg_WARN with drm_dbg_kms. [Jani]
v3: Modify commit message. [Suraj]

Signed-off-by: Nemesa Garg <nemesa.garg@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patch.msgid.link/20260115113948.641822-1-nemesa.garg@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_casf.c b/drivers/gpu/drm/i915/display/intel_casf.c
index 95339b496f241f78ddd7c47a98a7f6d7324298ac..0fe4398a1a4e3bae338f3aaa6f23fa692a1ce80b 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_casf.c
+++ b/drivers/gpu/drm/i915/display/intel_casf.c
@@ -116,6 +116,12 @@ int intel_casf_compute_config(struct intel_crtc_state *crtc_state)
                return 0;
        }
 
+       /* CASF with joiner not supported in hardware */
+       if (crtc_state->joiner_pipes) {
+               drm_dbg_kms(display->drm, "CASF not supported with joiner\n");
+               return -EINVAL;
+       }
+
        crtc_state->hw.casf_params.casf_enable = true;
 
        /*