[Intel-gfx] [PATCH] drm/i915: disable FBC if its pipe is fused off

[Luca Coelho]

In newer hardware, the FBCs are associated with their pipes, so if the
pipe is fused off, it means that the FBC is not available either.  We
already disable FBC A if pipe A is fused off, but the other FBCs were
not handled.

Currently we only have FBC A and FBC B, but for consistency, add FBC C
and D as well and disable them all accordingly, when their respective
pipes are fused off.

Signed-off-by: Luca Coelho <luciano.coelho at intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.h | 2 ++
 drivers/gpu/drm/i915/intel_device_info.c | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.h b/drivers/gpu/drm/i915/display/intel_fbc.h
index 4adb98afe6ff..6720ec8ee8a2 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.h
+++ b/drivers/gpu/drm/i915/display/intel_fbc.h
@@ -20,6 +20,8 @@ struct intel_plane_state;
 enum intel_fbc_id {
 	INTEL_FBC_A,
 	INTEL_FBC_B,
+	INTEL_FBC_C,
+	INTEL_FBC_D,
 
 	I915_MAX_FBCS,
 };
diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index 2018eaaa45f5..b45ffa6e9406 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -459,16 +459,19 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
 		if (dfsm & SKL_DFSM_PIPE_B_DISABLE) {
 			runtime->pipe_mask &= ~BIT(PIPE_B);
 			runtime->cpu_transcoder_mask &= ~BIT(TRANSCODER_B);
+			runtime->fbc_mask &= ~BIT(INTEL_FBC_B);
 		}
 		if (dfsm & SKL_DFSM_PIPE_C_DISABLE) {
 			runtime->pipe_mask &= ~BIT(PIPE_C);
 			runtime->cpu_transcoder_mask &= ~BIT(TRANSCODER_C);
+			runtime->fbc_mask &= ~BIT(INTEL_FBC_C);
 		}
 
 		if (DISPLAY_VER(dev_priv) >= 12 &&
 		    (dfsm & TGL_DFSM_PIPE_D_DISABLE)) {
 			runtime->pipe_mask &= ~BIT(PIPE_D);
 			runtime->cpu_transcoder_mask &= ~BIT(TRANSCODER_D);
+			runtime->fbc_mask &= ~BIT(INTEL_FBC_D);
 		}
 
 		if (dfsm & SKL_DFSM_DISPLAY_HDCP_DISABLE)
-- 
2.37.2