From: Gustavo Sousa <gustavo.sousa@intel.com>
Date: Wed, 5 Nov 2025 14:06:57 +0000 (-0300)
Subject: drm/i915/xe3p_lpd: Add CDCLK table
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=af28e607fc754a2c5ef9ce72e0045b6952b4f3ad;p=thirdparty%2Fkernel%2Flinux.git

drm/i915/xe3p_lpd: Add CDCLK table

Add CDCLK table for Xe3p_LPD.

Just as with Xe3_LPD, we don't need to send voltage index info in the
PMDemand message, so we are able to re-use xe3lpd_cdclk_funcs.

With the new CDCLK table, we also need to update the maximum CDCLK value
returned by intel_update_max_cdclk().

Bspec: 68861, 68863
Reviewed-by: Matt Atwood <matthew.s.atwood@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patch.msgid.link/20251103-xe3p_lpd-basic-enabling-v3-8-00e87b510ae7@intel.com
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
---

diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
index 50dca70a0665c..aeaa62ee6ad72 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -1534,6 +1534,41 @@ static const struct intel_cdclk_vals xe3lpd_cdclk_table[] = {
 	{}
 };
 
+static const struct intel_cdclk_vals xe3p_lpd_cdclk_table[] = {
+	{ .refclk = 38400, .cdclk = 151200, .ratio = 21, .waveform = 0xa4a4 },
+	{ .refclk = 38400, .cdclk = 176400, .ratio = 21, .waveform = 0xaa54 },
+	{ .refclk = 38400, .cdclk = 201600, .ratio = 21, .waveform = 0xaaaa },
+	{ .refclk = 38400, .cdclk = 226800, .ratio = 21, .waveform = 0xad5a },
+	{ .refclk = 38400, .cdclk = 252000, .ratio = 21, .waveform = 0xb6b6 },
+	{ .refclk = 38400, .cdclk = 277200, .ratio = 21, .waveform = 0xdbb6 },
+	{ .refclk = 38400, .cdclk = 302400, .ratio = 21, .waveform = 0xeeee },
+	{ .refclk = 38400, .cdclk = 327600, .ratio = 21, .waveform = 0xf7de },
+	{ .refclk = 38400, .cdclk = 352800, .ratio = 21, .waveform = 0xfefe },
+	{ .refclk = 38400, .cdclk = 378000, .ratio = 21, .waveform = 0xfffe },
+	{ .refclk = 38400, .cdclk = 403200, .ratio = 21, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 422400, .ratio = 22, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 441600, .ratio = 23, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 460800, .ratio = 24, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 480000, .ratio = 25, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 499200, .ratio = 26, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 518400, .ratio = 27, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 537600, .ratio = 28, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 556800, .ratio = 29, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 576000, .ratio = 30, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 595200, .ratio = 31, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 614400, .ratio = 32, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 633600, .ratio = 33, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 652800, .ratio = 34, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 672000, .ratio = 35, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 691200, .ratio = 36, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 710400, .ratio = 37, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 729600, .ratio = 38, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 748800, .ratio = 39, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 768000, .ratio = 40, .waveform = 0xffff },
+	{ .refclk = 38400, .cdclk = 787200, .ratio = 41, .waveform = 0xffff },
+	{}
+};
+
 static const int cdclk_squash_len = 16;
 
 static int cdclk_squash_divider(u16 waveform)
@@ -3560,7 +3595,9 @@ static int intel_compute_max_dotclk(struct intel_display *display)
  */
 void intel_update_max_cdclk(struct intel_display *display)
 {
-	if (DISPLAY_VERx100(display) >= 3002) {
+	if (DISPLAY_VER(display) >= 35) {
+		display->cdclk.max_cdclk_freq = 787200;
+	} else if (DISPLAY_VERx100(display) >= 3002) {
 		display->cdclk.max_cdclk_freq = 480000;
 	} else if (DISPLAY_VER(display) >= 30) {
 		display->cdclk.max_cdclk_freq = 691200;
@@ -3911,7 +3948,10 @@ static const struct intel_cdclk_funcs i830_cdclk_funcs = {
  */
 void intel_init_cdclk_hooks(struct intel_display *display)
 {
-	if (DISPLAY_VER(display) >= 30) {
+	if (DISPLAY_VER(display) >= 35) {
+		display->funcs.cdclk = &xe3lpd_cdclk_funcs;
+		display->cdclk.table = xe3p_lpd_cdclk_table;
+	} else if (DISPLAY_VER(display) >= 30) {
 		display->funcs.cdclk = &xe3lpd_cdclk_funcs;
 		display->cdclk.table = xe3lpd_cdclk_table;
 	} else if (DISPLAY_VER(display) >= 20) {