[RFC,20/60] drm/i915/dg1: Update comp master/slave relationships for PHYs
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Message ID 20200710115757.290984-21-matthew.auld@intel.com
State New
Headers show
Series
  • DG1 LMEM enabling
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Commit Message

Matthew Auld July 10, 2020, 11:57 a.m. UTC
From: Matt Roper <matthew.d.roper@intel.com>

As with RKL, DG1's PHY C acts as a comp master for PHY D.

Bspec: 49291
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
---
 drivers/gpu/drm/i915/display/intel_combo_phy.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch
diff mbox series

diff --git a/drivers/gpu/drm/i915/display/intel_combo_phy.c b/drivers/gpu/drm/i915/display/intel_combo_phy.c
index f6d7f807b884..f10c96d1ec39 100644
--- a/drivers/gpu/drm/i915/display/intel_combo_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_combo_phy.c
@@ -243,14 +243,14 @@  static bool phy_is_master(struct drm_i915_private *dev_priv, enum phy phy)
 	 *
 	 * ICL,TGL:
 	 *   A(master) -> B(slave), C(slave)
-	 * RKL:
+	 * RKL,DG1:
 	 *   A(master) -> B(slave)
 	 *   C(master) -> D(slave)
 	 *
 	 * We must set the IREFGEN bit for any PHY acting as a master
 	 * to another PHY.
 	 */
-	if (IS_ROCKETLAKE(dev_priv) && phy == PHY_C)
+	if ((IS_DG1(dev_priv) || IS_ROCKETLAKE(dev_priv)) && phy == PHY_C)
 		return true;
 
 	return phy == PHY_A;