[Intel-gfx] [PATCH 2/2] drm/i915/tgl: Update cdclk voltage level settings

[Matt Roper]

A recent bspec update added an extra voltage level that we didn't have
on ICL and new criteria for selecting the level.

Bspec: 49208
Cc: José Roberto de Souza <jose.souza at intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa at intel.com>
Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/i915/display/intel_cdclk.c | 19 ++++++++++++++++++-
 drivers/gpu/drm/i915/display/intel_ddi.c   |  4 +++-
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
index 7154a2288310..55b5dd169c51 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -1295,6 +1295,18 @@ static u8 ehl_calc_voltage_level(int cdclk)
 		return 0;
 }
 
+static u8 tgl_calc_voltage_level(int cdclk)
+{
+	if (cdclk > 556800)
+		return 3;
+	else if (cdclk > 326400)
+		return 2;
+	else if (cdclk > 312000)
+		return 1;
+	else
+		return 0;
+}
+
 static void cnl_readout_refclk(struct drm_i915_private *dev_priv,
 			       struct intel_cdclk_config *cdclk_config)
 {
@@ -2711,7 +2723,12 @@ void intel_update_rawclk(struct drm_i915_private *dev_priv)
  */
 void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv)
 {
-	if (IS_ELKHARTLAKE(dev_priv)) {
+	if (INTEL_GEN(dev_priv) >= 12) {
+		dev_priv->display.set_cdclk = bxt_set_cdclk;
+		dev_priv->display.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
+		dev_priv->display.calc_voltage_level = tgl_calc_voltage_level;
+		dev_priv->cdclk.table = icl_cdclk_table;
+	} else if (IS_ELKHARTLAKE(dev_priv)) {
 		dev_priv->display.set_cdclk = bxt_set_cdclk;
 		dev_priv->display.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
 		dev_priv->display.calc_voltage_level = ehl_calc_voltage_level;
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index ff638fc6e3f5..08a66b8a25cf 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -4206,7 +4206,9 @@ static bool intel_ddi_is_audio_enabled(struct drm_i915_private *dev_priv,
 void intel_ddi_compute_min_voltage_level(struct drm_i915_private *dev_priv,
 					 struct intel_crtc_state *crtc_state)
 {
-	if (IS_ELKHARTLAKE(dev_priv) && crtc_state->port_clock > 594000)
+	if (INTEL_GEN(dev_priv) >= 12 && crtc_state->port_clock > 594000)
+		crtc_state->min_voltage_level = 2;
+	else if (IS_ELKHARTLAKE(dev_priv) && crtc_state->port_clock > 594000)
 		crtc_state->min_voltage_level = 3;
 	else if (INTEL_GEN(dev_priv) >= 11 && crtc_state->port_clock > 594000)
 		crtc_state->min_voltage_level = 1;
-- 
2.24.1