[Intel-gfx] [PATCH v2 05/20] drm/i915: Make skl_compute_dbuf_slices() behave consistently for all platforms

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Currently skl_compute_dbuf_slices() returns 0 for any inactive pipe on
icl+, but returns BIT(S1) on pre-icl for any pipe (whether it's active or
not). Let's make the behaviour consistent and always return 0 for any
inactive pipe.

Cc: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a2e78969c0df..640f4c4fd508 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4408,7 +4408,7 @@ static u8 skl_compute_dbuf_slices(const struct intel_crtc_state *crtc_state,
 	 * For anything else just return one slice yet.
 	 * Should be extended for other platforms.
 	 */
-	return BIT(DBUF_S1);
+	return active_pipes & BIT(pipe) ? BIT(DBUF_S1) : 0;
 }
 
 static u64
-- 
2.24.1