[PATCH v4 3/7] drm/i915/xe3lpd: Disable HDCP Line Rekeying for Xe3

[Matt Atwood <matthew.s.atwood@intel.com>]

From: Suraj Kandpal <suraj.kandpal@intel.com>

We need to disable HDCP Line Rekeying for Xe3 when we are using an HDMI
encoder.

v2: add additional definition instead of function, commit message typo
fix and update.
v3: restore lost conditional from v2.
v4: subject line and subject message updated, fix the if ladder order,
fix the bit definition order.

Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Matt Atwood <matthew.s.atwood@intel.com>
---
 drivers/gpu/drm/i915/display/intel_hdcp.c | 10 +++++++---
 drivers/gpu/drm/i915/i915_reg.h           |  1 +
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index ed6aa87403e2..70dfc9d4d6ac 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -43,14 +43,18 @@ intel_hdcp_disable_hdcp_line_rekeying(struct intel_encoder *encoder,
 		return;
 
 	if (DISPLAY_VER(display) >= 14) {
-		if (IS_DISPLAY_VER_STEP(display, IP_VER(14, 0), STEP_D0, STEP_FOREVER))
-			intel_de_rmw(display, MTL_CHICKEN_TRANS(hdcp->cpu_transcoder),
-				     0, HDCP_LINE_REKEY_DISABLE);
+		if (DISPLAY_VER(display) >= 30)
+			intel_de_rmw(display,
+				     TRANS_DDI_FUNC_CTL(display, hdcp->cpu_transcoder),
+				     0, XE3_TRANS_DDI_HDCP_LINE_REKEY_DISABLE);
 		else if (IS_DISPLAY_VER_STEP(display, IP_VER(14, 1), STEP_B0, STEP_FOREVER) ||
 			 IS_DISPLAY_VER_STEP(display, IP_VER(20, 0), STEP_B0, STEP_FOREVER))
 			intel_de_rmw(display,
 				     TRANS_DDI_FUNC_CTL(display, hdcp->cpu_transcoder),
 				     0, TRANS_DDI_HDCP_LINE_REKEY_DISABLE);
+		else if (IS_DISPLAY_VER_STEP(display, IP_VER(14, 0), STEP_D0, STEP_FOREVER))
+			intel_de_rmw(display, MTL_CHICKEN_TRANS(hdcp->cpu_transcoder),
+				     0, HDCP_LINE_REKEY_DISABLE);
 	}
 }
 
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 89e4381f8baa..8d758947f301 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3817,6 +3817,7 @@ enum skl_power_gate {
 #define  TRANS_DDI_PVSYNC		(1 << 17)
 #define  TRANS_DDI_PHSYNC		(1 << 16)
 #define  TRANS_DDI_PORT_SYNC_ENABLE	REG_BIT(15)
+#define  XE3_TRANS_DDI_HDCP_LINE_REKEY_DISABLE	REG_BIT(15)
 #define  TRANS_DDI_EDP_INPUT_MASK	(7 << 12)
 #define  TRANS_DDI_EDP_INPUT_A_ON	(0 << 12)
 #define  TRANS_DDI_EDP_INPUT_A_ONOFF	(4 << 12)
-- 
2.45.0