[Intel-gfx] [PATCH] drm/i915/rkl: Add new cdclk table

[Matt Roper]

A recent bspec update has provided a new cdclk table for RKL.  All of
the cdclk values are the same as those we've been using on ICL, TGL,
etc., but we obtain them by doubling both the PLL ratio and CD2X divider
numbers.

Bspec: 49202
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 | 32 +++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
index 7b46330fa69c..c449d28d0560 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -1233,6 +1233,30 @@ static const struct intel_cdclk_vals icl_cdclk_table[] = {
 	{}
 };
 
+static const struct intel_cdclk_vals rkl_cdclk_table[] = {
+	{ .refclk = 19200, .cdclk = 172800, .divider = 4, .ratio =  36 },
+	{ .refclk = 19200, .cdclk = 192000, .divider = 4, .ratio =  40 },
+	{ .refclk = 19200, .cdclk = 307200, .divider = 4, .ratio =  64 },
+	{ .refclk = 19200, .cdclk = 326400, .divider = 8, .ratio = 136 },
+	{ .refclk = 19200, .cdclk = 556800, .divider = 4, .ratio = 116 },
+	{ .refclk = 19200, .cdclk = 652800, .divider = 4, .ratio = 136 },
+
+	{ .refclk = 24000, .cdclk = 180000, .divider = 4, .ratio =  30 },
+	{ .refclk = 24000, .cdclk = 192000, .divider = 4, .ratio =  32 },
+	{ .refclk = 24000, .cdclk = 312000, .divider = 4, .ratio =  52 },
+	{ .refclk = 24000, .cdclk = 324000, .divider = 8, .ratio = 108 },
+	{ .refclk = 24000, .cdclk = 552000, .divider = 4, .ratio =  92 },
+	{ .refclk = 24000, .cdclk = 648000, .divider = 4, .ratio = 108 },
+
+	{ .refclk = 38400, .cdclk = 172800, .divider = 4, .ratio = 18 },
+	{ .refclk = 38400, .cdclk = 192000, .divider = 4, .ratio = 20 },
+	{ .refclk = 38400, .cdclk = 307200, .divider = 4, .ratio = 32 },
+	{ .refclk = 38400, .cdclk = 326400, .divider = 8, .ratio = 68 },
+	{ .refclk = 38400, .cdclk = 556800, .divider = 4, .ratio = 58 },
+	{ .refclk = 38400, .cdclk = 652800, .divider = 4, .ratio = 68 },
+	{}
+};
+
 static int bxt_calc_cdclk(struct drm_i915_private *dev_priv, int min_cdclk)
 {
 	const struct intel_cdclk_vals *table = dev_priv->cdclk.table;
@@ -2823,7 +2847,13 @@ u32 intel_read_rawclk(struct drm_i915_private *dev_priv)
  */
 void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv)
 {
-	if (INTEL_GEN(dev_priv) >= 12) {
+	if (IS_ROCKETLAKE(dev_priv)) {
+		dev_priv->display.set_cdclk = bxt_set_cdclk;
+		dev_priv->display.bw_calc_min_cdclk = skl_bw_calc_min_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 = rkl_cdclk_table;
+	} else if (INTEL_GEN(dev_priv) >= 12) {
 		dev_priv->display.set_cdclk = bxt_set_cdclk;
 		dev_priv->display.bw_calc_min_cdclk = skl_bw_calc_min_cdclk;
 		dev_priv->display.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
-- 
2.24.1