[PATCH 05/23] drm/xe/xe3p_lpm: Stop reading the CTC_MODE register

[Lucas De Marchi <lucas.demarchi@intel.com>]

From: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>

CTC_MODE register is removed by Xe3p.  Stop reading that register on
Xe3p and later platforms.

Bspec: 62395
Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
---
 drivers/gpu/drm/xe/xe_gt_clock.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_gt_clock.c b/drivers/gpu/drm/xe/xe_gt_clock.c
index 4f011d1573c65..26052710be8a7 100644
--- a/drivers/gpu/drm/xe/xe_gt_clock.c
+++ b/drivers/gpu/drm/xe/xe_gt_clock.c
@@ -57,6 +57,10 @@ static void read_crystal_clock(struct xe_gt *gt, u32 rpm_config_reg, u32 *freq,
 
 static void check_ctc_mode(struct xe_gt *gt)
 {
+	/* CTC_MODE register is removed by Xe3p */
+	if (GT_VER(gt) >= 35)
+		return;
+
 	/*
 	 * CTC_MODE[0] = 1 is definitely not supported for Xe2 and later
 	 * platforms.  In theory it could be a valid setting for pre-Xe2

-- 
2.51.0