[PATCH 2/2] drm/i915/cx0: Set ssc_enabled for c20 too

[Suraj Kandpal]

ssc_enabled does not get set for c20 phy legacy native rates.
This means SSC for MPLLB for legacy rates and UHBR 13.5 is never
set. This patch makes sure we set ssc_enabled for both c10 and c20.

Signed-off-by: Suraj Kandpal <suraj.kandpal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_cx0_phy.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
index 3fd959a2773c..a0ae0be77c55 100644
--- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
@@ -2033,21 +2033,27 @@ intel_c10pll_tables_get(struct intel_crtc_state *crtc_state,
 	return NULL;
 }
 
-static void intel_c10pll_update_pll(struct intel_crtc_state *crtc_state,
+static void intel_cx0pll_update_ssc(struct intel_crtc_state *crtc_state,
 				    struct intel_encoder *encoder)
 {
 	struct intel_display *display = to_intel_display(encoder);
 	struct intel_cx0pll_state *pll_state = &crtc_state->dpll_hw_state.cx0pll;
-	int i;
 
 	if (intel_crtc_has_dp_encoder(crtc_state)) {
 		if (intel_panel_use_ssc(display)) {
 			struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-
 			pll_state->ssc_enabled =
 				(intel_dp->dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5);
 		}
 	}
+}
+
+static void intel_c10pll_update_pll(struct intel_crtc_state *crtc_state,
+				    struct intel_encoder *encoder)
+{
+	struct intel_display *display = to_intel_display(encoder);
+	struct intel_cx0pll_state *pll_state = &crtc_state->dpll_hw_state.cx0pll;
+	int i;
 
 	if (pll_state->ssc_enabled)
 		return;
@@ -2067,6 +2073,8 @@ static int intel_c10pll_calc_state(struct intel_crtc_state *crtc_state,
 	if (!tables)
 		return -EINVAL;
 
+	intel_cx0pll_update_ssc(crtc_state, encoder);
+
 	for (i = 0; tables[i]; i++) {
 		if (crtc_state->port_clock == tables[i]->clock) {
 			crtc_state->dpll_hw_state.cx0pll.c10 = *tables[i];
@@ -2319,6 +2327,8 @@ static int intel_c20pll_calc_state(struct intel_crtc_state *crtc_state,
 	if (!tables)
 		return -EINVAL;
 
+	intel_cx0pll_update_ssc(crtc_state, encoder);
+
 	for (i = 0; tables[i]; i++) {
 		if (crtc_state->port_clock == tables[i]->clock) {
 			crtc_state->dpll_hw_state.cx0pll.c20 = *tables[i];
-- 
2.34.1